[Mesa-dev] [PATCH 1/9] st/va: make the implementation thread save

Andy Furniss adf.lists at gmail.com
Mon Dec 21 13:25:47 PST 2015


Christian K├Ânig wrote:

>> Slightly unrelated question = with vaapi using mpeg2 do you get the
>> same result as vdpau or s/w?
>
> Well MPEG2 actually defines that the resulting image doesn't need to
> be 100% bit identical on all decoders. H.264 and others are way more
> strict regarding this.
>
> Do you also see actually visible artifacts as well?

In the vaapi case they are quite noticeable - too bad to be within some
sort of tolerance.

vdpau I wouldn't really notice without close inspection.

I am testing with mpv (git needed as release will default to s/w for
mpeg2 vaapi)

gstreamer omx hw dec produces the same artifacts as mpv vaapi.

(I have yet to test gstreamer vaapi on mpeg2 as I can't get it to work
with my samples - it works OK for vaapi + h264)



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