[MPlayer-users] mjpeg fps change

[RC]

On Sat, 15 Dec 2007 10:15:13 -0500
Alex <spam at twelve17.com> wrote:

> I would like to create a version of that file that plays at 1/2 the 
> speed (i.e. twice the length at 29.97 fps).  Preferably, I'd like the 
> frames to just be copied so that no re-compression is done.

-speed 0.5 -ovc copy

If you have an audio stream in the file as well, you'll have to reencode
it to change the speed.