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

[D Richard Felker III]

On Sat, Jan 29, 2005 at 12:24:24PM -0800, Trent Piepho wrote:
> On Sat, 29 Jan 2005, D Richard Felker III wrote:
> > 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
> 
> It's not that strange at all.  It's what ABC broadcasts all day long when they
> don't have native HD content.  It's NTSC upconverted from 480i-60000/1001 to
> 720p-60000/1001.  It could be telecined, but probably isn't.  

ok, then encoding at 29.97 (30000/1001) fps will do fine, i expect.

> Also, where did you get that 59.94 number, did you just type it in?  You
> chided me for using just three significant digits in an email message, and
> now you only use two?

it's just a name. i could call it 60, or 59.94, or whatever. the real
number is 60000/1001 if you're going to input it anywhere to mencoder,
but that's long to write when just discussing it.

rich