[Bug 771427] gtksink and GtkStack issue

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=771427

--- Comment #1 from Emmanuel Pacaud <emmanuel.pacaud at lapp.in2p3.fr> ---
Created attachment 335515
  --> https://bugzilla.gnome.org/attachment.cgi?id=335515&action=edit
Screenshot showing the issue

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