[MPlayer-users] How to grab two different frames at 1 and 2 seconds.

RC cooleyr at gmail.com
Sun Oct 28 02:23:10 CEST 2007

On Sun, 28 Oct 2007 00:01:12 +0900
"PaulM" <paulm at uusoftware.com> wrote:

> I assume I should get 4 different frames at positions 1,2,3 and 4. But
> that's wrong. For some reason I got the same frames which are
> absolutely equal. I got a different frame starting from 5th second
> only. Why is it so? 

Because -ss can only seek to the nearest keyframe, and your video file
has one keyframe every 5 seconds or so.

You can use something like -vf framestep to approximate what you want.

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