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ffmpegHow to make slow motion video using optical flow method


ffmpeg -i in.mp4 -filter:v "setpts=2*PTS" tmp.mp4
ffmpeg -i tmp.mp4 -filter:v "minterpolate='mi_mode=mci:mc_mode=aobmc:vsbmc=1:fps=120'" out.mp4ctrl + c
-i in.mp4

input video file

-filter:v

apply specified video filter

setpts=2*PTS

setpts filter will slow down video speed to half of original speed

tmp.mp4

temporary slow video that needs to be improved

minterpolate

motion interpolation filter to smooth out temporary video

fps=120

frame rate for resulting video

out.mp4

resulting video file