[Bug 750865] gst-libav crash

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=750865

--- Comment #20 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> ---
All this is very suspicious. Note that the patch (with the context hack) seems
to make sense to me if not racy. Though, we are using parsers to effectively
avoid this situation. To me the bug is that the resolution change is unnoticed
by matroskademux and h264parse. If that file is invalid, it could be explained
by matroskademux fooling h264parse. If the stream is valid, then I suspect a
bug in the demuxer. If the demuxer don't know, there should be a way to ensure
h264parse will catch it up. In GStreamer we rarely rely on decoder to tell us
when the resolution have changed (because it's often racy with threading).

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