[Bug 721148] [pitivi] GstVideoOverlay does not work with GTK 3.10's client-side window manager decorations

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=721148
  GStreamer | gst-plugins-base | 1.2.1

--- Comment #7 from Jean-François Fortin Tam <nekohayo at gmail.com> 2014-01-11 18:44:17 UTC ---
My guess is that this situation should be handled automatically by
gst/videooverlay, not sure applications should have to add this workaround*.

And if headerbar sets a RGBA visual, there must be a good reason no?



*: For what it's worth, I played a bit to try to translate your workaround
   in Python, but I probably did it incorrectly as it did not solve the issue
   on my end, the overlay stays black:

  system_visual = the_gtkdrawable_widget.get_screen().get_system_visual()
  if system_visual:
      the_gtkdrawable_widget.set_visual(system_visual)

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