[FFmpeg-user] Convert to 24p

[Carl Eugen Hoyos]

Thomas Worth <dev <at> rarevision.com> writes:

> > What you need is MEncoder's pullup filter.
> > Unfortunately, it does not yet work in FFmpeg, help on this issue is very
> > welcome!
> 
> You wouldn't use this to convert 25 fps to 23.976 fps for DVD. All
> (good) standards conversions with progressive material are done 1:1,
> only the audio is re-timed. Frame counts between PAL and NTSC DVDs
> should always be the same. This is why the running times of European
> versions of American movies are always slightly shorter.

The problem you describe - playing 24000/1001 material at 25fps and similar -
exists of course.

The more common (and significantly older and more often reported) problem with
framerates is playback of telecined material on a computer. This shows terrible
artefacts and needs the pullup filter to be solved.

(I suspect "Frame counts between PAL and NTSC DVDs should always be the same" is
wrong or misleading, but I live in PAL country so the problem does not really
affect me.)

Carl Eugen