video-transition: Make sure crossfade output never contains alpha

Otherwise it would get mixed with lower layers, which is totally
unexpected.

Fixes T7773

Differential Revision: https://phabricator.freedesktop.org/D1764

diff --git a/ges/ges-video-transition.c b/ges/ges-video-transition.c
index 3d4b3ff..6f430f3 100644 (file)
--- a/ges/ges-video-transition.c
+++ b/ges/ges-video-transition.c
@@ -350,7 +350,6 @@ ges_video_transition_create_element (GESTrackElement * object)
       oconv, NULL);
 
   mixer = ges_smart_mixer_new (NULL);
-  g_object_set (GES_SMART_MIXER (mixer)->mixer, "background", 3, NULL);
   GES_SMART_MIXER (mixer)->disable_zorder_alpha = TRUE;
   gst_bin_add (GST_BIN (topbin), mixer);