[Bug 767474] vaapidecode: video corruption with vp9 resolution changes

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=767474

--- Comment #4 from sreerenj <bsreerenj at gmail.com> ---
(In reply to Víctor Manuel Jáquez Leal from comment #3)
> According to this patch 
> 
> https://cgit.freedesktop.org/gstreamer/gstreamer-vaapi/commit/
> ?id=906a561c26578e17cae77be665934b498a814695
> 
> The VA-API spec says if the surfaces change, the context needs to be reset.
> 
> I wonder if this is something to be fixed in the driver, rather than
> work-arounded in gstreamer-vaapi.

Right now, all codecs except vp9 requires the context reset if surface size
changes . This is how driver implemented, i would say it is a limitation.
At the same time, AFAIK VP9 is the only codec which allows resolution change
even with out having a key/I frame before the change, and allowing
inter-prediction between the frames which are having different resolutions.

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