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How to use FFmpeg to get a slow-motion video clip.

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Making a slow-motion clip from a video can be very useful to show off what is happening in a certain scene.

The example below will make a slow-motion clip from a video file. This would be another very useful FFmpeg tip.

> ffmpeg -i qS_lu5dKo9A2qoNW.mp4 -c:v libvpx -b:v 3200k -filter:v "setpts=2.0*PTS" -ss 00:00:03 -t 6.9 -an -sn -copyts -threads 4 slowmotion.webm

This example will slow down the framerate.

> ffmpeg -i qS_lu5dKo9A2qoNW.mp4 -c:v libvpx -b:v 3200k -filter:v fps=15 -t 6 -an -sn -copyts -threads 4 horsie4.webm

Both are very useful video manipulation ideas. Below is a slow-motion example I created using FFmpeg, this worked out quite well.


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