docs: Update plugins cache
authorThibault Saunier <tsaunier@igalia.com>
Tue, 9 Jun 2020 19:31:56 +0000 (15:31 -0400)
committerThibault Saunier <tsaunier@igalia.com>
Wed, 10 Jun 2020 14:40:56 +0000 (10:40 -0400)
docs/plugins/gst_plugins_cache.json

index 762dab5..27f522f 100644 (file)
@@ -36,7 +36,7 @@
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
@@ -48,7 +48,7 @@
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
@@ -60,7 +60,7 @@
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "1024",
                         "max": "8192",
                         "min": "64",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "dvi (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstADPCMEncLayout",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "40000000",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4000",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "5000",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "6000",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "5",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "vbr (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAV1EncEndUsageMode",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "25",
                         "max": "1000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "8",
                         "max": "16",
                         "min": "8",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "8",
                         "max": "16",
                         "min": "8",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAV1EncResizeMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "8",
                         "max": "16",
                         "min": "8",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "8",
                         "max": "16",
                         "min": "8",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "63",
                         "max": "63",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAV1EncSuperresMode",
                         "writable": true
                         "default": "63",
                         "max": "63",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "256",
                         "max": "-1",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "6",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "6",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "25",
                         "max": "1000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4800",
                         "max": "-1",
                         "min": "18",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "5000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "1400",
                         "max": "-1",
                         "min": "28",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "96",
                         "max": "127",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "65535",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "-1",
                         "max": "65535",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-rtp-payload-stats, clock-rate=(uint)0, running-time=(guint64)18446744073709551615, seqnum=(uint)0, timestamp=(uint)0, ssrc=(uint)0, pt=(uint)96, seqnum-offset=(uint)0, timestamp-offset=(uint)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "-1",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "15",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "1.79769e+308",
                         "min": "-1.79769e+308",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "default": "0",
                         "max": "1.79769e+308",
                         "min": "-1.79769e+308",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "1.79769e+308",
                         "min": "-1.79769e+308",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "default": "1",
                         "max": "1.79769e+308",
                         "min": "-1.79769e+308",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "1000000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": false
                         "default": "0",
                         "max": "1000000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "64",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstValueArray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "manual (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAudioMixMatrixModeType",
                         "writable": true
                         "default": "0",
                         "max": "64",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "657930",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "fade (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAudioVisualizerShader",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "dots (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSpaceScopeStyle",
                         "writable": true
                         "default": "657930",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "fade (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAudioVisualizerShader",
                         "writable": true
                         "default": "657930",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "fade (1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstAudioVisualizerShader",
                         "writable": true
                         "default": "657930",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "fade (1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstAudioVisualizerShader",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "dots (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWaveScopeStyle",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gpointer",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
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-                        "mutable": "playing",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
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-                        "mutable": "playing",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
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-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "127",
                         "max": "127",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "700",
                         "max": "2000",
                         "min": "300",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": true
                         "default": "45",
                         "max": "150",
                         "min": "10",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1024",
                         "max": "-1",
                         "min": "1",
-                        "mutable": "playing",
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                         "type": "guint",
                         "writable": true
                         "default": "1024",
                         "max": "-1",
                         "min": "1",
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                         "readable": true,
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                         "writable": true
                         "default": "6",
                         "max": "9",
                         "min": "1",
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                         "writable": true
                         "default": "1024",
                         "max": "-1",
                         "min": "1",
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                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "ANY",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstCaps",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "type": "GstElement",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "type": "GstElement",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
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                         "type": "GstElement",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "(none)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstCamFlags",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "default": "ANY",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "gchararray",
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                         "max": "3.40282e+38",
                         "min": "1",
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": false,
                         "default": "mode-image (1)",
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                         "readable": true,
                         "type": "GstCameraBin2Mode",
                         "writable": true
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                         "controllable": false,
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                         "default": "ANY",
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                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstEncodingProfile",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "ANY",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": false
                         "default": "1",
                         "max": "10",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "10",
                         "max": "3.40282e+38",
                         "min": "1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "mode-image (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCameraBin2Mode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "ANY",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "default": "1",
                         "max": "3.40282e+38",
                         "min": "1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "120",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "1",
                         "max": "63",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "center (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCeaCcOverlayWinHPos",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "zero (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAggregatorStartTimeSelection",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "255",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "30",
                         "max": "180",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstColorEffectsPreset",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "perceptual (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstLcmsIntent",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "cached (2)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstLcmsLookupMethod",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "localhost:5555",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "63",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "30",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gint",
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                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
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                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
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                         "default": "localhost:5555",
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                         "min": "0",
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                         "max": "-1",
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                         "default": "localhost:5555",
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                         "min": "0",
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                         "max": "9223372036854775807",
                         "min": "-1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "default": "NULL",
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                         "max": "2147483647",
                         "min": "0",
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                         "construct-only": false,
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                         "default": "0",
                         "max": "63",
                         "min": "0",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "controllable": false,
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-                        "mutable": "playing",
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                         "construct-only": false,
                         "controllable": false,
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                         "min": "0",
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                         "max": "2147483647",
                         "min": "0",
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                         "max": "9223372036854775807",
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                         "max": "-1",
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                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GStrv",
                         "writable": true
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                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "request-headers;",
-                        "mutable": "playing",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "2.0 (2)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstCurlHttpVersionType",
                         "writable": true
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                         "controllable": false,
                         "default": "true",
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                         "max": "3600",
                         "min": "0",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "GStreamer curlhttpsrc libcurl/<curl-version>",
-                        "mutable": "playing",
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                         "construct-only": false,
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                         "controllable": false,
                         "default": "localhost:5555",
-                        "mutable": "playing",
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                         "max": "18446744073709551615",
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                         "default": "0",
                         "max": "4294967",
                         "min": "0",
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                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "default": "30",
                         "max": "-1",
                         "min": "2",
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                         "default": "0/1",
                         "max": "2147483647/1",
                         "min": "0/1",
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                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "10s",
-                        "mutable": "playing",
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                         "type": "gchararray",
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "default": "2000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "dash.mpd",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "type": "gchararray",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "ts (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstDashSinkMuxerType",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "gboolean",
                         "writable": true
                         "default": "15",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "true",
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                         "default": "true",
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                         "type": "gboolean",
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                         "default": "4096",
                         "max": "-1",
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                         "type": "guint",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "sha1 (1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstChecksumSinkHash",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "18446744073709551615",
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                         "max": "18446744073709551615",
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                         "type": "GstStructure",
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                         "construct-only": false,
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                         "max": "2147483647",
                         "min": "1",
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                         "max": "2147483647",
                         "min": "1",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "default (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstClockSelectClockId",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "memory+meta+timestamps+flags",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstBufferCopyFlags",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "mem (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCompareMethod",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "1.79769e+308",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "sha1 (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GChecksumType",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "not-linked (-1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstFlowReturn",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "overlay-composition+crop",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstFakeVideoSinkAllocationMetaFlags",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "5000000",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "15000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstFakeSinkStateError",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "500",
                         "max": "2147483647",
                         "min": "1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "default": "-1",
                         "max": "1.79769e+308",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gdouble",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "1.79769e+308",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gdouble",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstElement",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1000",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
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                         "type": "gchararray",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "20000000",
                         "max": "9223372036854775807",
                         "min": "-1",
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                         "type": "gint64",
                         "writable": true
                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
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                         "type": "gint64",
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                         "default": "40000000",
                         "max": "18446744073709551614",
                         "min": "0",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
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                         "default": "5",
                         "max": "2147483647",
                         "min": "1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "2 (2)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkAudioChannels",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkAudioConnection",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "1000000000",
                         "max": "18446744073709551614",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "22",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "half (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkDuplexMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "default": "255",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "off (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkKeyerMode",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "20000000",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "ntsc (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkModes",
                         "writable": true
                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rp188any (3)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkTimecodeFormat",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "8bit-yuv (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkVideoFormat",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "5",
                         "max": "2147483647",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkConnection",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "half (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkDuplexMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkModes",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": false
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rp188any (3)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkTimecodeFormat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDecklinkVideoFormat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "closed (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDtlsConnectionState",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "2",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "0",
                         "max": "1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "closed (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDtlsConnectionState",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstBuffer",
                         "writable": false
                         "default": "0",
                         "max": "2",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "0",
                         "max": "1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "closed (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDtlsConnectionState",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "closed (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstDtlsConnectionState",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "0",
                         "max": "16",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "GstDvbSrcDelsys",
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                         "default": "VBR encoding (1)",
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                         "default": "Normal block type (0)",
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                         "type": "GstSample",
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                         "default": "0",
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                         "max": "18446744073709551615",
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                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GValueArray",
                         "writable": true
                         "default": "2",
                         "max": "64",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "raw (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstAudioParseFormat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "44100",
                         "max": "2147483647",
                         "min": "1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "s16le (4)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstAudioFormat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "i420 (2)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstVideoFormat",
                         "writable": true
                         "default": "25/1",
                         "max": "2147483647/1",
                         "min": "0/1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstFraction",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "240",
                         "max": "2147483647",
                         "min": "0",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0,76800,96000",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "1/1",
                         "max": "100/1",
                         "min": "1/100",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstFraction",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "320,160,160",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "320",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "50000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "192000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": false
                         "default": "0",
                         "max": "1000",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "10",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "default": "1",
                         "max": "10",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "200",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Samples (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-comp-delay-monomode",
                         "writable": true
                         "default": "0",
                         "max": "192000",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": true
                         "default": "20",
                         "max": "60",
                         "min": "-60",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "1000",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "default": "1",
                         "max": "10",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "50000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "192000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": false
                         "default": "0",
                         "max": "1000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "10",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "1",
                         "max": "10",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "200",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Samples (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-comp-delay-stereomode",
                         "writable": true
                         "default": "0",
                         "max": "192000",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "20",
                         "max": "60",
                         "min": "-60",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "1000",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "default": "1",
                         "max": "10",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "0",
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                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "0",
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                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "50000",
                         "min": "0",
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                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "50000",
                         "min": "0",
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                         "writable": false
                         "default": "0",
                         "max": "192000",
                         "min": "0",
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                         "writable": false
                         "default": "0",
                         "max": "192000",
                         "min": "0",
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                         "writable": false
                         "default": "0",
                         "max": "1000",
                         "min": "0",
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                         "default": "0",
                         "max": "1000",
                         "min": "0",
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                         "default": "0",
                         "max": "10",
                         "min": "0",
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                         "default": "0",
                         "max": "10",
                         "min": "0",
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                         "default": "1",
                         "max": "10",
                         "min": "0",
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                         "writable": true
                         "default": "0",
                         "max": "200",
                         "min": "0",
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                         "writable": true
                         "default": "0",
                         "max": "200",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Samples (0)",
-                        "mutable": "playing",
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                         "type": "lsp-plug-in-plugins-lv2-comp-delay-x2-stereomode-l",
                         "writable": true
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                         "controllable": true,
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-                        "mutable": "playing",
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                         "writable": true
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                         "max": "192000",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
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                         "controllable": true,
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                         "controllable": true,
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                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
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                         "default": "0",
                         "max": "10000",
                         "min": "0",
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                         "default": "20",
                         "max": "60",
                         "min": "-60",
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                         "default": "20",
                         "max": "60",
                         "min": "-60",
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                         "max": "1000",
                         "min": "0",
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                         "writable": true
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                         "min": "0",
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                         "default": "BT48 (0)",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x16-msmode",
                         "writable": true
                         "default": "0",
                         "max": "192000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0.2",
                         "max": "1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "1",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "BT48 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x16-msslope",
                         "writable": true
                         "default": "0",
                         "max": "3.98107",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "3.98107",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "controllable": true,
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                         "controllable": true,
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                         "construct-only": false,
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                         "max": "1",
                         "min": "0.01585",
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                         "default": "0",
                         "max": "100",
                         "min": "-100",
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                         "construct-only": false,
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                         "construct-only": false,
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                         "default": "Off (0)",
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                         "min": "0.01585",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
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                         "controllable": true,
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "1",
                         "min": "0.01585",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "-100",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Off (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-lrfft",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
                         "controllable": true,
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Bands Left 0-15 (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-lrfsel",
                         "writable": true
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                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "controllable": true,
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                         "writable": true
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                         "writable": true
                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "controllable": true,
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                         "type": "gboolean",
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                         "default": "1",
                         "max": "1",
                         "min": "0.01585",
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                         "type": "gfloat",
                         "writable": true
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                         "controllable": true,
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Off (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-monofft",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Bands 0-15 (0)",
-                        "mutable": "playing",
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                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-monofsel",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "1",
                         "min": "0.01585",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "-100",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Off (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-msfft",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Bands Middle 0-15 (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-msfsel",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "controllable": true,
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                         "controllable": true,
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                         "writable": false
                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "default": "false",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "controllable": true,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "1",
                         "min": "0.01585",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "100",
                         "min": "-100",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Off (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-stereofft",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "Bands 0-15 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-graph-equalizer-x32-stereofsel",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "construct-only": false,
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "min": "0.01585",
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                         "max": "1",
                         "min": "0.01585",
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                         "default": "None (0)",
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                         "type": "lsp-plug-in-plugins-lv2-impulse-responses-monocs",
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                         "max": "10",
                         "min": "0",
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                         "min": "0.25119",
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                         "min": "0.25119",
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                         "min": "0.25119",
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                         "default": "32767 (6)",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-impulse-responses-monofft",
                         "writable": true
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                         "max": "10",
                         "min": "0",
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                         "default": "10000",
                         "max": "22000",
                         "min": "2000",
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                         "max": "10000",
                         "min": "0",
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                         "max": "55",
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                         "max": "10000",
                         "min": "0",
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                         "max": "10000",
                         "min": "0",
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                         "max": "1000",
                         "min": "10",
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                         "default": "off (0)",
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                         "writable": true
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                         "max": "100",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "None (0)",
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                         "writable": true
                         "default": "1",
                         "max": "10",
                         "min": "0",
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                         "max": "10",
                         "min": "0",
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                         "max": "1",
                         "min": "0",
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                         "max": "1",
                         "min": "0",
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                         "min": "0.25119",
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                         "max": "20",
                         "min": "0.1",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Herm Thin (1)",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-limiter-monomode",
                         "writable": true
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                         "max": "1",
                         "min": "0",
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                         "min": "0.25",
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                         "max": "10",
                         "min": "0",
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                         "min": "0.1",
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                         "construct-only": false,
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                         "default": "Herm Thin (1)",
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                         "max": "192000",
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                         "max": "2000",
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                         "default": "20",
                         "max": "2000",
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                         "max": "2000",
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                         "max": "2000",
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                         "default": "20",
                         "max": "2000",
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                         "max": "2000",
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                         "max": "2000",
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                         "construct-only": false,
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                         "default": "Split Left (0)",
-                        "mutable": "playing",
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                         "default": "20",
                         "max": "2000",
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                         "writable": true
                         "default": "20",
                         "max": "2000",
                         "min": "0",
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                         "default": "20",
                         "max": "2000",
                         "min": "0",
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                         "default": "20",
                         "max": "2000",
                         "min": "0",
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                         "default": "20",
                         "max": "2000",
                         "min": "0",
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                         "max": "2000",
                         "min": "0",
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                         "max": "2000",
                         "min": "0",
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                         "max": "2000",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Split Mid (0)",
-                        "mutable": "playing",
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                         "controllable": true,
                         "default": "x1 (0)",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-para-equalizer-x32-stereos-5",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "x1 (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-para-equalizer-x32-stereos-6",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "x1 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-para-equalizer-x32-stereos-7",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "x1 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-para-equalizer-x32-stereos-8",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "x1 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-para-equalizer-x32-stereos-9",
                         "writable": true
                         "default": "1",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "3.98107",
                         "min": "0",
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                         "readable": true,
                         "type": "gfloat",
                         "writable": false
                         "default": "0",
                         "max": "3.98107",
                         "min": "0",
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                         "type": "gfloat",
                         "writable": false
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
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                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "construct-only": false,
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "false",
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                         "controllable": true,
                         "default": "false",
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                         "writable": true
                         "construct-only": false,
                         "controllable": true,
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                         "default": "false",
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                         "controllable": true,
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                         "construct-only": false,
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                         "default": "false",
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                         "controllable": true,
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                         "controllable": true,
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                         "default": "false",
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                         "default": "false",
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                         "default": "false",
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                         "max": "1",
                         "min": "6.3e-05",
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                         "default": "1000",
                         "max": "2000",
                         "min": "0",
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                         "max": "1",
                         "min": "6.3e-05",
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                         "max": "2000",
                         "min": "0",
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                         "max": "1000",
                         "min": "-1000",
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                         "max": "192000",
                         "min": "0",
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                         "default": "0",
                         "max": "60",
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                         "construct-only": false,
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                         "default": "RT20 (3)",
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                         "default": "LTI Auto (*.wav) (0)",
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                         "default": "Idle (0)",
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                         "default": "10",
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                         "default": "1000",
                         "max": "2000",
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                         "min": "6.3e-05",
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                         "min": "0",
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                         "max": "60",
                         "min": "0",
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                         "construct-only": false,
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                         "default": "RT20 (3)",
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                         "controllable": true,
                         "default": "LTI Auto (*.wav) (0)",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Idle (0)",
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                         "max": "60",
                         "min": "0",
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                         "max": "50",
                         "min": "1",
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                         "default": "-100",
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                         "min": "-100",
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                         "max": "100",
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                         "min": "-100",
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                         "max": "100",
                         "min": "-100",
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                         "default": "-25",
                         "max": "89",
                         "min": "-89",
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                         "default": "1",
                         "max": "100",
                         "min": "-100",
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                         "max": "100",
                         "min": "-100",
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                         "max": "100",
                         "min": "-100",
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                         "construct-only": false,
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                         "default": "0 (0)",
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                         "default": "None (0)",
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                         "type": "gboolean",
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                         "type": "gboolean",
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                         "type": "gboolean",
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                         "controllable": true,
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                         "default": "1 (2)",
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                         "default": "1 (2)",
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                         "default": "1 (2)",
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                         "type": "lsp-plug-in-plugins-lv2-room-builder-stereoscf-2",
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                         "type": "lsp-plug-in-plugins-lv2-room-builder-stereoscf-3",
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                         "default": "1 (2)",
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                         "type": "lsp-plug-in-plugins-lv2-room-builder-stereoscf-4",
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                         "default": "1 (2)",
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                         "construct-only": false,
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                         "default": "Any (0)",
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                         "controllable": true,
                         "default": "Any (0)",
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                         "default": "Any (0)",
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                         "default": "Any (0)",
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                         "default": "Any (0)",
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                         "default": "Cardioid (0)",
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                         "default": "Cardioid (0)",
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                         "default": "Cardioid (0)",
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                         "default": "Cardioid (0)",
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                         "min": "10",
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                         "default": "100",
                         "max": "1000",
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                         "default": "100",
                         "max": "1000",
                         "min": "10",
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                         "max": "1000",
                         "min": "10",
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                         "default": "100",
                         "max": "1000",
                         "min": "10",
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                         "default": "100",
                         "max": "1000",
                         "min": "10",
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                         "max": "1000",
                         "min": "10",
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                         "default": "1",
                         "max": "10",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "0-4 (0)",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-slap-delay-monolsel",
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                         "max": "200",
                         "min": "0",
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                         "max": "400",
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                         "max": "60",
                         "min": "-60",
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                         "default": "120",
                         "max": "360",
                         "min": "20",
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                         "controllable": true,
                         "default": "Pink noise (3)",
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                         "type": "lsp-plug-in-plugins-lv2-spectrum-analyzer-x1env",
                         "writable": true
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                         "controllable": true,
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                         "default": "0",
                         "max": "24000",
                         "min": "10",
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                         "construct-only": false,
                         "controllable": true,
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "1",
                         "min": "0",
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                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Analyzer (0)",
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                         "type": "lsp-plug-in-plugins-lv2-spectrum-analyzer-x1mode",
                         "writable": true
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                         "min": "0",
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                         "max": "1000",
                         "min": "0",
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                         "construct-only": false,
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                         "max": "1",
                         "min": "0",
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                         "default": "0",
                         "max": "100",
                         "min": "0",
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                         "default": "1",
                         "max": "1000",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
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                         "type": "lsp-plug-in-plugins-lv2-spectrum-analyzer-x1spm",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "4096 (2)",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "Hann (0)",
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                         "max": "1",
                         "min": "0.01585",
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                         "default": "Trigger (0)",
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                         "writable": true
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                         "type": "gboolean",
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                         "default": "0.25119",
                         "max": "10",
                         "min": "0",
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                         "writable": true
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                         "max": "10",
                         "min": "0",
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                         "writable": true
                         "default": "5",
                         "max": "20",
                         "min": "0",
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                         "default": "1.99526",
                         "max": "20",
                         "min": "0",
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                         "default": "0.01585",
                         "max": "20",
                         "min": "0",
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                         "default": "10",
                         "max": "100",
                         "min": "0",
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                         "default": "1",
                         "max": "10",
                         "min": "0",
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                         "default": "0",
                         "max": "20",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "127",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "RMS (1)",
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                         "type": "lsp-plug-in-plugins-lv2-trigger-midi-monomode",
                         "writable": true
                         "construct-only": false,
                         "controllable": true,
                         "default": "B (11)",
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                         "readable": true,
                         "type": "lsp-plug-in-plugins-lv2-trigger-midi-mononote",
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                         "construct-only": false,
                         "controllable": true,
                         "default": "0 (2)",
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                         "writable": true
                         "default": "0",
                         "max": "192000",
                         "min": "0",
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                         "construct-only": false,
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                         "writable": true
                         "default": "1",
                         "max": "100",
                         "min": "0",
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                         "writable": true
                         "default": "20",
                         "max": "250",
                         "min": "0",
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                         "max": "20",
                         "min": "0",
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                         "max": "1",
                         "min": "0",
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                         "max": "100",
                         "min": "0",
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                         "min": "0",
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                         "max": "20",
                         "min": "0",
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                         "writable": true
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                         "max": "10",
                         "min": "0",
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                         "construct-only": false,
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                         "writable": true
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                         "writable": true
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                         "max": "10",
                         "min": "0",
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                         "max": "10",
                         "min": "0",
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                         "max": "20",
                         "min": "0",
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                         "min": "0",
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                         "min": "0",
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                         "min": "0",
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                         "min": "0",
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                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "100",
                         "max": "200",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "30",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "20",
                         "max": "40",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "20",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encAspect",
                         "writable": true
                         "default": "0",
                         "max": "2",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "1125",
                         "max": "40000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "4000",
                         "min": "20",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encFormat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encFramerate",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "-1 (-1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encInterlaceMode",
                         "writable": true
                         "default": "9",
                         "max": "11",
                         "min": "8",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "250",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "-1",
                         "max": "250",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "32",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encVideoNorm",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0 (-1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encPlaybackFieldOrders",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "9 (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstMpeg2encQuantisationMatrix",
                         "writable": true
                         "default": "100",
                         "max": "2500",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "31",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "10",
                         "min": "-4",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "2",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "gfloat",
                         "writable": true
                         "default": "3",
                         "max": "4",
                         "min": "1",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": true
                         "default": "2",
                         "max": "4",
                         "min": "1",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "10240",
                         "min": "0",
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                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "40",
                         "min": "-40",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "512",
                         "min": "0",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "700",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
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                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
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                         "type": "guint64",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "9000",
                         "max": "-1",
                         "min": "1",
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                         "type": "guint",
                         "writable": true
                         "default": "3600",
                         "max": "-1",
                         "min": "1",
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                         "type": "guint",
                         "writable": true
                         "default": "9000",
                         "max": "-1",
                         "min": "1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstStructure",
                         "writable": true
                         "default": "27000000",
                         "max": "-1",
                         "min": "1",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
                         "writable": true
                         "default": "9000",
                         "max": "-1",
                         "min": "1",
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                         "type": "guint",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "zero (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstAggregatorStartTimeSelection",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "max": "18446744073709551615",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "writable": true
                         "construct-only": false,
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                         "default": "false",
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                         "type": "gboolean",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "-1",
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                         "max": "-1",
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                         "max": "-1",
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                         "type": "guint",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
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                         "type": "GstStructure",
                         "writable": true
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                         "max": "-1",
                         "min": "1",
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                         "min": "0",
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                         "max": "-1",
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                         "max": "18446744073709551615",
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                         "construct-only": false,
                         "controllable": false,
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                         "type": "GstAggregatorStartTimeSelection",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "default": "0",
                         "max": "4000",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "mpeg-1 (0)",
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                         "type": "GstMplexFormat",
                         "writable": true
                         "default": "0",
                         "max": "15360",
                         "min": "0",
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                         "default": "1",
                         "max": "100",
                         "min": "1",
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                         "max": "16384",
                         "min": "256",
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                         "default": "500000000",
                         "max": "18446744073709551615",
                         "min": "100000000",
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                         "construct-only": false,
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                         "default": "NULL",
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                         "type": "gchararray",
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                         "controllable": false,
-                        "mutable": "playing",
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                         "type": "GstStructure",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
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                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "max": "3600",
                         "min": "0",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "type": "GStrv",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "http://localhost/",
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                         "type": "gboolean",
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                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
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                         "max": "3600",
                         "min": "0",
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                         "controllable": false,
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "GStreamer neonhttpsrc",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": false,
                         "default": "uniform (0)",
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                         "type": "GstNetSimDistribution",
                         "writable": true
                         "default": "0",
                         "max": "1",
                         "min": "0",
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                         "type": "gfloat",
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                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "default": "0",
                         "max": "1",
                         "min": "0",
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                         "default": "0",
                         "max": "1",
                         "min": "0",
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                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "default": "400",
                         "max": "2147483647",
                         "min": "-2147483648",
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                         "max": "2147483647",
                         "min": "-1",
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                         "max": "2147483647",
                         "min": "-2147483648",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
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                         "type": "gchararray",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "default": "40000000",
                         "max": "18446744073709551614",
                         "min": "1",
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                         "type": "guint64",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "default": "200000",
                         "max": "9223372036854775807",
                         "min": "1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
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                         "type": "gchararray",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
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                         "type": "gchararray",
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                         "default": "1000000000",
                         "max": "18446744073709551614",
                         "min": "0",
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                         "default": "40000",
                         "max": "9223372036854775807",
                         "min": "1",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstSample",
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                         "default": "10000",
                         "max": "9223372036854775807",
                         "min": "1",
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                         "type": "gint64",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "9223372036854775807",
                         "min": "-1",
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                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "default": "false",
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                         "type": "gboolean",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "skew (1)",
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                         "type": "GstAudioBaseSinkSlaveMethod",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "construct-only": false,
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                         "type": "gboolean",
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                         "default": "10000",
                         "max": "9223372036854775807",
                         "min": "1",
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                         "type": "gint64",
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                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "type": "gint",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "skew (2)",
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                         "type": "GstAudioBaseSrcSlaveMethod",
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                         "construct-only": false,
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                         "default": "1",
                         "max": "3.40282e+38",
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                         "default": "6",
                         "max": "2147483647",
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                         "default": "9",
                         "max": "2147483647",
                         "min": "1",
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                         "default": "350",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "25",
                         "max": "2147483647",
                         "min": "1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "chessboard (0)",
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                         "type": "GstCameraCalibrationPattern",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "max": "3.40282e+38",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "max": "1",
                         "min": "0",
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                         "max": "2147483647",
                         "min": "1",
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                         "construct-only": false,
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                         "min": "1",
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                         "default": "3",
                         "max": "7",
                         "min": "1",
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                         "max": "1.79769e+308",
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                         "min": "0",
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                         "default": "0",
                         "max": "1.79769e+308",
                         "min": "0",
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                         "default": "2147483647",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "3",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "3",
                         "max": "2147483647",
                         "min": "1",
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                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "1.79769e+308",
                         "min": "0",
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                         "type": "gdouble",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "gaussian (2)",
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                         "type": "GstCvSmoothTypeType",
                         "writable": true
                         "default": "2147483647",
                         "max": "2147483647",
                         "min": "0",
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                         "writable": true
                         "default": "3",
                         "max": "7",
                         "min": "1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "2147483647",
                         "min": "-1",
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                         "type": "gint",
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                         "default": "0",
                         "max": "2147483647",
                         "min": "-1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "single-panorama (0)",
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                         "type": "GstDewarpDisplayMode",
                         "writable": true
                         "default": "0",
                         "max": "1",
                         "min": "0",
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                         "type": "gdouble",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "bilinear (1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstDewarpInterpolationMode",
                         "writable": true
                         "default": "0",
                         "max": "1",
                         "min": "0",
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                         "default": "true",
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                         "type": "gboolean",
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                         "default": "0.5",
                         "max": "1",
                         "min": "0",
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                         "default": "1",
                         "max": "10",
                         "min": "0.1",
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                         "default": "0.5",
                         "max": "1",
                         "min": "0",
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                         "default": "1",
                         "max": "10",
                         "min": "0.1",
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                         "type": "gdouble",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "sgbm (1)",
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                         "type": "GstDisparityMethod",
                         "writable": true
                         "default": "3",
                         "max": "7",
                         "min": "3",
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                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "default": "50",
                         "max": "1000",
                         "min": "0",
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                         "default": "150",
                         "max": "1000",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "do-canny-pruning",
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                         "type": "GstOpencvFaceBlurFlags",
                         "writable": true
                         "default": "3",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "30",
                         "max": "2147483647",
                         "min": "0",
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                         "max": "2147483647",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "/usr/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml",
-                        "mutable": "playing",
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                         "construct-only": false,
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                         "type": "gboolean",
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                         "default": "1.25",
                         "max": "10",
                         "min": "1.1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "/usr/share/OpenCV/haarcascades/haarcascade_mcs_eyepair_small.xml",
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                         "construct-only": false,
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                         "default": "do-canny-pruning",
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                         "default": "3",
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                         "default": "/usr/share/OpenCV/haarcascades/haarcascade_mcs_mouth.xml",
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                         "default": "/usr/share/OpenCV/haarcascades/haarcascade_mcs_nose.xml",
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                         "default": "/usr/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml",
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                         "default": "1.25",
                         "max": "10",
                         "min": "1.1",
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                         "default": "every_frame (0)",
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                         "default": "1.6",
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                         "default": "5",
                         "max": "60",
                         "min": "1",
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                         "default": "10",
                         "max": "32",
                         "min": "8",
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                         "max": "32",
                         "min": "8",
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                         "default": "1",
                         "max": "60",
                         "min": "1",
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                         "construct-only": false,
                         "controllable": false,
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                         "max": "5",
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                         "controllable": false,
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                         "construct-only": false,
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                         "construct-only": false,
                         "controllable": false,
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                         "default": "0",
                         "max": "180",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
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                         "default": "0.5",
                         "max": "1",
                         "min": "0",
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                         "default": "0.01",
                         "max": "1",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
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                         "max": "255",
                         "min": "0",
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                         "default": "0",
                         "max": "255",
                         "min": "0",
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                         "default": "0",
                         "max": "255",
                         "min": "0",
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                         "default": "1",
                         "max": "5",
                         "min": "1",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "Opencv Text Overlay",
-                        "mutable": "playing",
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                         "type": "gchararray",
                         "writable": true
                         "default": "2",
                         "max": "2147483647",
                         "min": "0",
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                         "type": "gint",
                         "writable": true
                         "default": "1",
                         "max": "5",
                         "min": "1",
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                         "default": "50",
                         "max": "2147483647",
                         "min": "0",
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                         "default": "50",
                         "max": "2147483647",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "basic (0)",
-                        "mutable": "playing",
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                         "type": "GstRetinexMethod",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "writable": true
                         "default": "3",
                         "max": "4",
                         "min": "1",
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                         "default": "0.01",
                         "max": "1",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "mog2 (2)",
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                         "type": "GstSegmentationMethod",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "construct-only": false,
                         "controllable": false,
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                         "construct-only": false,
                         "controllable": false,
                         "default": "hsv (0)",
-                        "mutable": "playing",
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                         "type": "GstSkindetectMethod",
                         "writable": true
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                         "controllable": false,
                         "default": "true",
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                         "default": "3",
                         "max": "5",
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                         "type": "GstOpenh264encComplexity",
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                         "default": "90",
                         "max": "-1",
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                         "type": "guint64",
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                         "max": "-1",
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-                        "mutable": "playing",
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                         "readable": true,
                         "type": "RC_MODES",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "n-slices (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstOpenh264EncSliceModes",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "camera (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "EUsageType",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "1",
                         "max": "10",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "6",
                         "max": "10",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "1",
                         "max": "2147483647",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "lrcp (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstOpenJPEGEncProgressionOrder",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483648",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483648",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "-1",
                         "max": "65535",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "-1",
                         "max": "65535",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstProxySink",
                         "writable": true
                         "default": "480",
                         "max": "18446744073709551615",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "10000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "10000000000",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-60",
                         "max": "70",
                         "min": "-70",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "/dev/dvd",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "65535",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "127.0.0.1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "65535",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "65535",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": false,
                         "type": "gchararray",
                         "writable": true
                         "default": "5900",
                         "max": "65535",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "3.3",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "65535",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "100",
                         "max": "32767",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "localhost",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "localhost:5004",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "broadcast (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstRistBondingMethodType",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0.05",
                         "max": "0.05",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "100",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "5004",
                         "max": "65534",
                         "min": "2",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "1200",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rist/x-sender-stats, sent-original-packets=(guint64)0, sent-retransmitted-packets=(guint64)0, session-stats=(GValueArray)< \"rist/x-sender-session-stats\\,\\ session-id\\=\\(int\\)0\\,\\ sent-original-packets\\=\\(guint64\\)0\\,\\ sent-retransmitted-packets\\=\\(guint64\\)0\\,\\ round-trip-time\\=\\(guint64\\)0\\;\" >;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0.0.0.0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0.0.0.0:5004",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0.05",
                         "max": "0.05",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                         "default": "7",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "100",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "1",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "5004",
                         "max": "65534",
                         "min": "2",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "1000",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "70",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rist/x-receiver-stats, dropped=(guint64)0, received=(guint64)0, recovered=(guint64)0, permanently-lost=(guint64)0, duplicates=(guint64)0, retransmission-requests-sent=(guint64)0, rtx-roundtrip-time=(guint64)0, session-stats=(GValueArray)< \"rist/x-receiver-session-stats\\,\\ session-id\\=\\(int\\)0\\,\\ rtp-from\\=\\(string\\)\\\"\\\"\\,\\ rtcp-from\\=\\(string\\)\\\"\\\"\\,\\ dropped\\=\\(guint64\\)0\\,\\ received\\=\\(guint64\\)0\\;\" >;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": false,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483647",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "3.40282e+38",
                         "min": "-3.40282e+38",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": false,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483647",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "3.40282e+38",
                         "min": "-3.40282e+38",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483647",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "3.40282e+38",
                         "min": "-3.40282e+38",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483647",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "3.40282e+38",
                         "min": "-3.40282e+38",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "120",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "live",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstRtmpAuthmod",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "LNX 10,0,32,18",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "localhost",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "rtmp://localhost/live/myStream",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "1935",
                         "max": "65535",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "20000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rtmp (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstRtmpScheme",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "GstRtmpConnectionStats, in-chunk-size=(uint)0, out-chunk-size=(uint)0, in-window-ack-size=(uint)0, out-window-ack-size=(uint)0, in-bytes-total=(guint64)0, out-bytes-total=(guint64)0, in-bytes-acked=(guint64)0, out-bytes-acked=(guint64)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "myStream",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "5",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "validate-all",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GTlsCertificateFlags",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "live",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstRtmpAuthmod",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "LNX 10,0,32,18",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "localhost",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rtmp://localhost/live/myStream",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "1935",
                         "max": "65535",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rtmp (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstRtmpScheme",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "GstRtmpConnectionStats, in-chunk-size=(uint)0, out-chunk-size=(uint)0, in-window-ack-size=(uint)0, out-window-ack-size=(uint)0, in-bytes-total=(guint64)0, out-bytes-total=(guint64)0, in-bytes-acked=(guint64)0, out-bytes-acked=(guint64)0;",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstStructure",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "myStream",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "5",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "validate-all",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GTlsCertificateFlags",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0.0.0.0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "5004",
                         "max": "65534",
                         "min": "2",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "64",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "1",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rtp://0.0.0.0:5004",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "0.0.0.0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "200",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "5004",
                         "max": "65534",
                         "min": "2",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "64",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "1",
                         "max": "255",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "rtp://0.0.0.0:5004",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "40000000",
                         "max": "9223372036854775807",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "200",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "10000000",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstSample",
                         "writable": false
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "default": "18446744073709551615",
                         "max": "9223372036854775807",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "416",
                         "max": "4095",
                         "min": "0",
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                         "default": "verdana 12",
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                         "max": "999",
                         "min": "100",
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                         "max": "153",
                         "min": "-1",
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                         "type": "gboolean",
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                         "default": "%%s\\n",
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                         "type": "GDateTime",
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                         "default": "150000000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "gboolean",
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                         "default": "250000000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "keep (1)",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
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                         "construct-only": false,
                         "controllable": false,
                         "default": "internal (0)",
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                         "default": "0",
                         "max": "2147483647",
                         "min": "-2147483648",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "default": "100",
                         "max": "100",
                         "min": "0",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "construct-only": false,
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                         "default": "NULL",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "controllable": false,
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                         "type": "GstEncodingProfile",
                         "writable": true
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                         "controllable": false,
                         "default": "NULL",
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                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "default": "32",
                         "max": "2147483647",
                         "min": "0",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "/dev/video0",
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                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
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                         "default": "",
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                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
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                         "default": "10",
                         "max": "3.40282e+38",
                         "min": "1",
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                         "type": "gfloat",
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                         "construct-only": false,
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                         "default": "false",
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                         "type": "gboolean",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "mode-video (2)",
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                         "readable": true,
                         "type": "GstCameraBin2Mode",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
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                         "default": "ANY",
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                         "type": "GstCaps",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
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                         "default": "true",
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                         "default": "90",
                         "max": "100",
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                         "min": "0",
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                         "max": "2147483647",
                         "min": "0",
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                         "max": "2147483647",
                         "min": "0",
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                         "default": "10",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "64",
                         "min": "0",
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                         "default": "16",
                         "max": "2147483647",
                         "min": "1",
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                         "max": "2147483647",
                         "min": "1",
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                         "max": "2147483647",
                         "min": "0",
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                         "max": "2147483647",
                         "min": "0",
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                         "max": "1",
                         "min": "0",
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                         "max": "2147483647",
                         "min": "0",
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                         "max": "2147483647",
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                         "max": "2147483647",
                         "min": "1",
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                         "default": "0.3",
                         "max": "1",
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                         "max": "2147483647",
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                         "construct-only": false,
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                         "default": "MR660 (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstVoAmrWbEncBandMode",
                         "writable": true
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                         "controllable": false,
                         "default": "false",
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                         "default": "40000000",
                         "max": "9223372036854775807",
                         "min": "0",
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                         "type": "gboolean",
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                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
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                         "type": "GstVulkanDevice",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "controllable": false,
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                         "construct": false,
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                         "controllable": false,
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                         "type": "GstSample",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "readable": true,
                         "type": "guint64",
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                         "default": "5000000",
                         "max": "9223372036854775807",
                         "min": "-1",
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                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "default": "0/1",
                         "max": "2147483647/1",
                         "min": "0/1",
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                         "readable": true,
                         "type": "GstFraction",
                         "writable": true
                         "default": "15000000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "application/x-gst-base-sink-stats, average-rate=(double)0, dropped=(guint64)0, rendered=(guint64)0;",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstStructure",
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                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "type": "guint64",
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                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
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                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
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                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "green-magenta-dubois (0)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstVulkanStereoDownmix",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstVideoMultiviewFlags",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (-1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstVideoMultiviewMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstVideoMultiviewFlags",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (-1)",
-                        "mutable": "playing",
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                         "readable": true,
                         "type": "GstVideoMultiviewMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
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                         "type": "gboolean",
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                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
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                         "type": "GstVulkanInstance",
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                         "construct": false,
                         "construct-only": true,
                         "controllable": false,
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                         "readable": true,
                         "type": "GstVulkanPhysicalDevice",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
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                         "type": "guint",
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                         "construct": false,
                         "construct-only": true,
                         "controllable": false,
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                         "type": "GstVulkanInstance",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
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                         "type": "gchararray",
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                         "construct-only": false,
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                         "default": "true",
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                         "type": "gboolean",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
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                         "writable": true
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                         "controllable": false,
                         "default": "NULL",
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                         "construct-only": false,
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                         "default": "true",
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                         "controllable": false,
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                         "readable": true,
                         "type": "GstSample",
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                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "default": "5000000",
                         "max": "9223372036854775807",
                         "min": "-1",
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                         "default": "15000000",
                         "max": "18446744073709551615",
                         "min": "0",
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                         "construct-only": false,
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                         "default": "true",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "construct-only": false,
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                         "controllable": false,
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                         "type": "GstStructure",
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                         "construct-only": false,
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                         "default": "true",
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                         "max": "18446744073709551615",
                         "min": "0",
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                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
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                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "photo (2)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebpEncPreset",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "90",
                         "max": "100",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gfloat",
                         "writable": true
                         "default": "4",
                         "max": "6",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCBundlePolicy",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "new (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCPeerConnectionState",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSessionDescription",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSessionDescription",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCICE",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "new (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCICEConnectionState",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "new (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCICEGatheringState",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "all (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCICETransportPolicy",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSessionDescription",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSessionDescription",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSessionDescription",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSessionDescription",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "stable (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCSignalingState",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebRTCRTPTransceiver",
                         "writable": false
                         "construct": false,
                         "construct-only": false,
                         "controllable": false,
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "NiceAgent",
                         "writable": false
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "9",
                         "max": "90",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "moderate (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebrtcEchoSuppressionLevel",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "adaptive-digital (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebrtcGainControlMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "moderate (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebrtcNoiseSuppressionLevel",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "webrtcechoprobe0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "12",
                         "max": "255",
                         "min": "12",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "3",
                         "max": "31",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "10",
                         "max": "30",
                         "min": "10",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "low (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstWebrtcVoiceDetectionLikelihood",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "1024",
                         "max": "1073741823",
                         "min": "1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "steady (1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "NonstreamAudioOutputMode",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "default (2)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "NonstreamAudioSubsongMode",
                         "writable": true
                         "default": "4096",
                         "max": "-1",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "NULL",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "default": "-1",
                         "max": "2147483647",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "-9223372036854775808",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "0",
                         "max": "2147483647",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "none (-1)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstX265LogLevel",
                         "writable": true
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "default": "-1",
                         "max": "51",
                         "min": "-1",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "medium (6)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstX265SpeedPreset",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "ssim (2)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstX265Tune",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "auto (0)",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "GstYadifModes",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "false",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                         "construct-only": false,
                         "controllable": false,
                         "default": "true",
-                        "mutable": "playing",
+                        "mutable": "null",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true