Am 23.09.2019 um 14:45 schrieb RazrFalcon:
Hi!
I have a 240FPS video made by GoPro and I'm looking for a way to gradually
change a video framerate. If I want to simply slow down a video I can use:
ffmpeg -i raw.mp4 -filter_complex "[v:0]setpts=8*PTS" -r 30 out.mp4
and it works fine. But when I'm trying to use a "variable" framerate like
this:
ffmpeg -i raw.mp4 -filter_complex "[v:0]setpts='lerp(2,8,T/5)*PTS'" -r 30
out.mp4
(5 is a video duration in seconds)
the resulting video stutters a lot.
Is there are a correct way to smoothly change the framerate using some
curve/function?
Have a look at this posting where a totally different approach is described:
http://ffmpeg.org/pipermail/ffmpeg-user/2017-June/036310.html
Michael
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