[FFmpeg-user] Change fps from 50 to 25

Cecil Westerhof Cecil at decebal.nl
Sat Nov 12 14:57:10 EET 2022

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?

Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof

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