[Ffmpeg-devel] DAR and SAR FFmpeg option confusion
Tue Mar 13 19:00:26 CET 2007
On Tue, 2007-03-13 at 09:27 +0000, M?ns Rullg?rd wrote:
> > I see your point now and it does make sense. That said, I guess
> > my biggest concern would be that starting to demand DAR being 15:11
> > for 4:3 DV (or anything else for that matter) might be problematic from
> > a usability standpoint plus it might present a problem as far as
> > flagging 4:3 in various containers is concerned.
> > But I guess, if admitting DAR being 15:9 instead of 4:3 is our
> > official "party line" I would protest too loudly ;-)
> The problem with DV appears to be that it is outright lying about the
> aspect ratios.
What is lying in your opinion ? The codec ? The SPEC ? The
information presented here ?
Please be more specific.
Also, you say that its just DV, not really -- SVCD for example
would also have the same problem.
> Given two of DAR, SAR and size, the third can be
> easily calculated. The numbers you gave are inconsistent. We can't
> easily "fix" it as mathematics won't bend very easily.
Which numbers and why do you think they are inconsistent ? Once
again, please go read: http://www.mir.com/DMG/aspect.html and if
you find yourself in disagreement with what's written there then we
can talk about it meaningfully. The numbers Robert and I quoted are
very consistent with what's written as part of the resource mentioned
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