[FFmpeg-user] Convert to 24p

Bernd Butscheidt bbutscheidt at yahoo.de
Thu Oct 27 20:15:20 CEST 2011

>From: Thomas Worth <dev at rarevision.com>
>An: FFmpeg user questions and RTFMs <ffmpeg-user at ffmpeg.org>
>sent: 18:43 Donnerstag, 27.Oktober 2011 
>subject: Re: [FFmpeg-user] Convert to 24p
>A better option would be to map the frames 1:1 and time-stretch the
>audio to match instead. A change in audio speed over 1-2 frames per
>second is much less perceptible than a change in frame rate (and its
>jittery result).

I totally must agree.
Mplayer/ Mencoder provides the option -speed for doing a job like this. 
Even better, the option -scaletempo let you decide whether the change of speed change the audio pitch or not. With this, you can do a real speed up (Film to Pal) or speed down (Pal to Film) e.g. without dropping frames but, of course, change the running time of your video.

I'm not aware of ffmpeg being capable of doing such a thing by now. 

More information about the ffmpeg-user mailing list