[Bug 745251] New: glvideomixer: corrupt video frames

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=745251

            Bug ID: 745251
           Summary: glvideomixer: corrupt video frames
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: vliaskov at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

gst-launch-1.0 playbin uri=file:///opt/Videos/test.avi
video-stream-combiner=glvideomixer

Result: Output video frames are corrupt (green lines across video)

This does not happen with default video-stream-combiner or with other
video-stream-combiner element (e.g. compositor works fine). It also does not
depend on video-sink (happens with glimagesink, xvimagesink or default sink
picked by playbin)

Tested with master from 26/5/2015

This behaviour is also reproducible with an application prototype (not shared
here because it's long, but maybe i could reduce it to a smaller test case if
needed). The application seamlessly plays video files, dynamically connecting
the next files's uridecodebin/queue pipeline to glvideomixer, when the prefious
file/pipeline has finished. In the application the corrupt frames are observed
afer the fist switch (so first file plays correctly, and only after switching
to 2nd file do we get the corrupt frames).

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