On Sun, May 31, 2015 at 14:38:02 +0200, Paul B Mahol wrote: > Dana 31. 5. 2015. 11:46 osoba "Steve" <[email protected]> napisala je:
> > At 25fps, dropping 1 frame would allow the the audio to be pitched/time > stretched by 4% and dropping 1 frame every 2 seconds would allow for 2% > See select and framestep filter documentation. (I may be wrong, but:) This isn't complete, the video won't play faster after dropping the frames, due to the timestamps of the retained frames. I think that after dropping one in N frames, you need to increase the speed using the setpts filter with a factor of (N-1)/N. setpts=24/25*PTS Just figuring this out from the top of my head, it's late. ;-) Moritz _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
