#11271: How to choose the best hwaccel?
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Reporter: Mads | Owner: (none)
Johansen |
Type: enhancement | Status: closed
Priority: normal | Component:
| undetermined
Version: git-master | Resolution: fixed
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by Balling):
> ("-f null" of FFmpeg already gives nothing, I believe)
It does not even work, it says
At least one output file must be specified
Did you even try it? Repeatedly trying
ffmpeg -hwaccel cuda -i example.h264 -an -c:v rawvideo -f null -
gives speed=37.7x maximium
ffmpeg -hwaccel cuda -i example.h264 -an -c:v rawvideo -f null NUL
gives speed= 38x
example.h264 file is here https://github.com/wang-
bin/QtAV/files/1132086/example.zip
it also switches to P0, BTW, as I said: 41% 37C P0 84W /
260W
in nvidia-smi
--
Ticket URL: <https://trac.ffmpeg.org/ticket/11271#comment:10>
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