#3020: FFmpeg should do framerate convert before scaling if (and only if) that
is
expected to be faster
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Reporter: kaifu.tang | Owner:
Type: enhancement | Status: open
Priority: normal | Component: FFmpeg
Version: git-master | Resolution:
Keywords: ffmpeg | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 1 |
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Comment (by kaifu.tang):
Replying to [comment:5 michael]:
> jpeg does not support yuv420, it uses yuvj420 which needs colorspace
convertion that msmpeg4 does not need.
> and scaling is done before framerate handling currently.
> You can force it to be done the other way around with -vf fps=0.2,scale
Thank you! michael.
I try testing it with your advice. This issue is resolved when frame rate
set be low. The colorspace conversion or scaling will be performance issue
if frame rate is unchange. Is it right?
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3020#comment:7>
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