[Bug 669959] New: Switching from an automatic crossfade transition to another type does not work

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=669959
  GStreamer | gst-editing-services | git

           Summary: Switching from an automatic crossfade transition to
                    another type does not work
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-editing-services
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: nekohayo at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


So, I implemented transitions in a branch of pitivi:
https://github.com/nekohayo/pitivi/commits/transitions

I think my code is correct since, with the latest commit, GES returns False
instead of an error when calling set_transition_type.