#9771: Small MAX_SLICES makes d3d11va (AVC) not bitperfect and causes artifacts
(but not CUDA/NVDEC)
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Reporter: Balling | Owner: (none)
Type: defect | Status: open
Priority: important | Component: avcodec
Version: git-master | Resolution:
Keywords: d3d11va, | Blocked By:
h264, hwaccel, dxva2 |
Blocking: | Reproduced by developer: 1
Analyzed by developer: 1 |
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Comment (by Balling):
There is a limit in dxva2 decoder in nvidia driver, it cannot do
https://code.videolan.org/-/project/435/uploads/e52babf681e96f453a151d98a65942c8/coow1212l.mp4
sample, but d3d11 can do it.
There is no strict limit in sw decoder, MAX_SLICES 32 means nothing, as
there are 41 slices in https://github.com/wang-
bin/QtAV/files/1132086/example.zip and yet it works just fine with
software decoder and does not warn about anything.
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Ticket URL: <https://trac.ffmpeg.org/ticket/9771#comment:9>
FFmpeg <https://ffmpeg.org>
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