rtspsrc: Strip keys from the fmtp that we use internally in our caps

Skip keys from the fmtp, which we already use ourselves for the
caps. Some software is adding random things like clock-rate into
the fmtp, and we would otherwise here set a string-typed clock-rate
in the caps... and thus fail to create valid RTP caps

https://bugzilla.gnome.org/show_bug.cgi?id=753009

diff --git a/gst/rtsp/gstrtspsrc.c b/gst/rtsp/gstrtspsrc.c
index 156ea27..3edb752 100644 (file)
--- a/gst/rtsp/gstrtspsrc.c
+++ b/gst/rtsp/gstrtspsrc.c
@@ -2152,6 +2152,11 @@ gst_rtspsrc_media_to_caps (gint pt, const GstSDPMedia * media)
       for (i = 0; pairs[i]; i++) {
         gchar *valpos;
         const gchar *val, *key;
+        gint j;
+        const gchar *reserved_keys[] =
+            { "media", "payload", "clock-rate", "encoding-name",
+          "encoding-params"
+        };
 
         /* the key may not have a '=', the value can have other '='s */
         valpos = strstr (pairs[i], "=");
@@ -2170,6 +2175,19 @@ gst_rtspsrc_media_to_caps (gint pt, const GstSDPMedia * media)
         }
         /* strip the key of spaces, convert key to lowercase but not the value. */
         key = g_strstrip (pairs[i]);
+
+        /* skip keys from the fmtp, which we already use ourselves for the
+         * caps. Some software is adding random things like clock-rate into
+         * the fmtp, and we would otherwise here set a string-typed clock-rate
+         * in the caps... and thus fail to create valid RTP caps
+         */
+        for (j = 0; j < G_N_ELEMENTS (reserved_keys); j++) {
+          if (g_ascii_strcasecmp (reserved_keys[i], key) == 0) {
+            key = "";
+            break;
+          }
+        }
+
         if (strlen (key) > 1) {
           tmp = g_ascii_strdown (key, -1);
           gst_structure_set (s, tmp, G_TYPE_STRING, val, NULL);