[FFmpeg-trac] #7778(avcodec:new): Visual artifacts when decoding with h264_cuvid
FFmpeg
trac at avcodec.org
Sat Mar 9 20:28:02 EET 2019
#7778: Visual artifacts when decoding with h264_cuvid
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Reporter: Ilya87 | Owner:
Type: defect | Status: new
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: cuvid | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by philipl):
I can see the artifacts with cuvid in mpv too. It's not a big surprise,
given the limitations in the nvidia parser. As hleppkes says, you should
use nvdec. I'm not sure if ffplay supports hwaccels - at least I can't see
how to activate them.
I'd recommend using a real media player like mpv if you want to play back
the file (of course, `ffmpeg` can do hwaccel decoding for transcoding
purposes, etc).
`ffmpeg -hwaccel nvdec -hwaccel_output_format cuda <etc>`
Separately, I don't understand what 420 subsampling in a high444p profile
file means - the nvidia decoder definitely can't handle actual 444
subsampling.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7778#comment:6>
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