[FFmpeg-trac] #7542(avfilter:new): Low encoding performance depending on input method with filter complex
FFmpeg
trac at avcodec.org
Mon Nov 12 00:04:01 EET 2018
#7542: Low encoding performance depending on input method with filter complex
-------------------------------------+-------------------------------------
Reporter: | Owner:
daneelveloper | Status: new
Type: defect | Component: avfilter
Priority: normal | Resolution:
Version: git-master | Blocked By:
Keywords: | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 1 |
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Comment (by daneelveloper):
In this examples I'm splitting the input clip ''(1920x1080, 29.97 fps,
h264 video, aac audio 48000khz stereo. Audio negligible)'' into two
separate inputs.
Speed values as reported by ffmpeg.exe (4.0.2)
This one runs at 4.15x speed.
{{{
ffmpeg -i input.mp4 -filter_complex
"split[v0][v1],[v0][v1]blend=extremity" -c:v mpeg4 -y output.mp4
}}}
And the next just goes up to 1.65x speed.
{{{
ffmpeg -filter_complex
"movie=input.mp4,split[v0][v1];[v0][v1]blend=extremity" -c:v mpeg4 -y
output.mp4
}}}
In the second example it's obvious the slowness comes from movie filter
but it also states that split filter derived inputs won't improve speed.
Thank you.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7542#comment:4>
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