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

[Rich Felker]

On Sun, Mar 12, 2006 at 02:58:07PM +0100, Erik Slagter wrote:
> 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,

No they're not. Why don't you learn why the number is 1000/1001 (and
this an _exact_ 1000/1001, not a nice approximation of some physical
quantity) by reading the history of NTSC rather than making ignorant
comments?

> I see both equally often.

Either you've never bothered to look at all, or this is a lie. You
never see 30001/1001 unless someone made a typo since it's totally
incorrect.

> Actually I
> think I don't even want to know which one is correct :-p

30000/1001 is correct of course.

Rich