[Bug 740222] libav: Video decoder maps buffer READ/WRITE instead of just WRITE

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740222
  GStreamer | gst-libav | 1.4.4

--- Comment #4 from Nicolas Dufresne (stormer) <nicolas.dufresne at collabora.co.uk> 2014-11-20 14:34:42 UTC ---
(In reply to comment #3)
> Also aviddec is potentially using the buffers for reference frames, which means
> that they must be readable. Just WRITE would be wrong here.

Though, it does not seem to keep it after the frame has been produces. Hence
why this large latency.

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