[Ffmpeg-devel] [ bug ] converting png to dv gives solid black

[Christian Iversen]

On Sunday 12 March 2006 15:35, M?ns Rullg?rd wrote:
> Erik Slagter <erik at slagter.name> writes:
> > On Sat, 2006-03-11 at 23:20 +0000, Dieter wrote:
> >> > > ffmpeg -i checkerboard_3x3_%d.png -r 30001/1001 -pix_fmt yuv411p
> >> > > tmp.dv
> >> >
> >> > A question unrelated to your problem:
> >> > Why not use -r 30000/1001 ? That's the official value for 29.97fps.
> >>
> >> Because that's what Erik recommended.
> >>
> >> Hmmmm... google finds a *lot* more hits for 30000 than for 30001.
> >
> > Besides the fact that either 30000/1001 and 30001/1001 are completely
> > stupid from a design point of view, I see both equally often. Actually I
> > think I don't even want to know which one is correct :-p
>
> The common frame rates are 24000/1001, 24, 25, 30000/1001, 30, 50,
> 60000/1001, and 60 fps.  30001/1001 is very unlikely to be correct.

Where do these /1001 come from, historically?

-- 
Regards,
Christian Iversen