qtdemux: add depth for ProRes 4:4:4:4 variants if available

Might be 24bpp in case an alpha channel is coded but
the image is always opaque.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1061>

diff --git a/gst/isomp4/qtdemux.c b/gst/isomp4/qtdemux.c
index 9e15439..6ede64b 100644 (file)
--- a/gst/isomp4/qtdemux.c
+++ b/gst/isomp4/qtdemux.c
@@ -14507,12 +14507,24 @@ qtdemux_video_caps (GstQTDemux * qtdemux, QtDemuxStream * stream,
       caps =
           gst_caps_new_simple ("video/x-prores", "variant", G_TYPE_STRING,
           "4444", NULL);
+
+      /* 24 bits per sample = an alpha channel is coded but image is always opaque */
+      if (entry->bits_per_sample > 0) {
+        gst_caps_set_simple (caps, "depth", G_TYPE_INT, entry->bits_per_sample,
+            NULL);
+      }
       break;
     case FOURCC_ap4x:
       _codec ("Apple ProRes 4444 XQ");
       caps =
           gst_caps_new_simple ("video/x-prores", "variant", G_TYPE_STRING,
           "4444xq", NULL);
+
+      /* 24 bits per sample = an alpha channel is coded but image is always opaque */
+      if (entry->bits_per_sample > 0) {
+        gst_caps_set_simple (caps, "depth", G_TYPE_INT, entry->bits_per_sample,
+            NULL);
+      }
       break;
     case FOURCC_cfhd:
       _codec ("GoPro CineForm");