[FFmpeg-user] Change fps from 50 to 25
Carl Eugen Hoyos
ceffmpeg at gmail.com
Sat Nov 12 15:30:38 EET 2022
Am Sa., 12. Nov. 2022 um 13:57 Uhr schrieb Cecil Westerhof via
ffmpeg-user <ffmpeg-user at ffmpeg.org>:
> Michael Koch <astroelectronic at t-online.de> writes:
> > Am 12.11.2022 um 12:39 schrieb Cecil Westerhof via ffmpeg-user:
> >> I have a few videos that have a 50 fps. But the computer I am playing
> >> them on cannot handle that properly. Can I use ffmpeg to change the
> >> fps to 25? While still having the same length.
> > sure, that's easy:
> > ffmpeg -i in.mp4 -r 25 out.mp4
> That really is easy. :-D
> I should add a '-preset veryfast'. That makes it go about three times
> as fast (on my system).
> But that still takes a lot of time. Maybe I ask something stupid, but
> would it be possible to drop every other frame and copy the rest?
Unfortunately not if your input is h264, that is technically not possible.
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