[MEncoder-users] converting a 59.940 FPS avi into a 23.976 FPS one

[D Richard Felker III]

On Sat, Jan 29, 2005 at 06:31:23AM +0100, Tetsuo Yokozuka wrote:
> Hello,
> 
> I have a 720p (yes, *progressive*) MPEG2 avi file at 59.940 FPS ripped
> from HDTV, and I would like to convert it into an XviD avi file at
> 23.976 FPS. I have read the man page, as well as the HTML doc, but I'm
> confused. I can't find a way to do that without the video getting
> choppy. While I'm at it, does it matter that the resulting FPS rate be
> exactly 23.976, or could I convert the video to exactly 24 or 25 FPS
> just as well?

well first of all we need to know more about the source. this is very
strange source. is it really 60 (59.94) distinct, progressive frames
per second? or are some of them duplicated, perhaps in a 3:2 telecine
pattern but without the interlacing? unless it's some sort of
telecine, you most certainly should not convert to 23.976 fps. this
will just make the video choppy. if keeping the full framerate is not
possible, i would strongly recommend dropping to exactly half
(30000/1001, aka 29.97) rather than strange values.

rich