John Allard John Allard - 1 year ago 220
Bash Question

Extract list of specific frames using ffmpeg

I'm trying to use ffmpeg on a video to extract a list of specific frames, denoted by their frame numbers. So lets say I want to extract just one frame from 'test_video.mp4', frame number 150 to be exact. I can use the following command

ffmpeg -i test_video.mp4 -vf "select=gte(n\, 150)" -vframes 1 ~/test_image.jpg

But what if I want to exact a list of frames, such as
[100, 110, 127, 270, 300]
? I have been looking at this page ( and can see that there are ways to extract multiple frames based on parity of frame number, timestamps, etc, but I can't find the syntax for doing what I need to do.

Ideally I would extract the list of given frames under the naming convention
where the
is replaced by the given frame number, although a timestamp would also work.

Is there a way to do this?

Answer Source


ffmpeg -i in.mp4 -vf select='eq(n\,100)+eq(n\,184)+eq(n\,213)' -vsync 0 frames%d.jpg

FFmpeg is primarily a processor of timed video i.e. media with a cycle rate such as framerate or sample rate. It assumes that the output should be at the same rate as the source. If inadequate frames are supplied, it duplicates unless told not to. In this case, -vsync 0 which, in this case, tells it to suppress duplication.