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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Major artifacts in mpeg2 vaapi hw decoding"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110257#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Major artifacts in mpeg2 vaapi hw decoding"
href="https://bugs.freedesktop.org/show_bug.cgi?id=110257">bug 110257</a>
from <span class="vcard"><a class="email" href="mailto:randrik@mail.ru" title="Andrew Randrianasulu <randrik@mail.ru>"> <span class="fn">Andrew Randrianasulu</span></a>
</span></b>
<pre>wasn't this fixed by
<a href="https://cgit.freedesktop.org/mesa/mesa/commit/?id=d507bcdcf26b417dea201090165af651253b6b11">https://cgit.freedesktop.org/mesa/mesa/commit/?id=d507bcdcf26b417dea201090165af651253b6b11</a>
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st/va: reverse qt matrix back to its original order
The quantiser matrix that VAAPI provides has been applied with inverse z-scan.
However, what we expect in MPEG2 picture description is the original order.
Therefore, we need to reverse it back to its original order.
Bugzilla: <a class="bz_bug_link
bz_status_NEW "
title="NEW - Major artifacts in mpeg2 vaapi hw decoding"
href="show_bug.cgi?id=110257">https://bugs.freedesktop.org/show_bug.cgi?id=110257</a>
Cc: <a href="mailto:mesa-stable@lists.freedesktop.org">mesa-stable@lists.freedesktop.org</a>
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I can only test with Cinelerra-GG, and my nv92 crad decodes 1080p25 mpeg2 very
slowly (video decoder clock problem) - but for me images were ok!</pre>
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