[FFmpeg-devel] About guess_correct_pts / AVFrame.best_effort_timestamp

Michael Niedermayer michaelni
Wed Feb 16 19:12:59 CET 2011

On Wed, Feb 16, 2011 at 04:28:38PM +0000, M?ns Rullg?rd wrote:
> Nicolas George <nicolas.george at normalesup.org> writes:
> > L'octidi 28 pluvi?se, an CCXIX, M?ns Rullg?rd a ?crit?:
> >> ??? = frame.pkt_pts
> >
> > AV_NOPTS_VALUE if the input format is AVI. This is not acceptable. Please
> > try again.
> AVI doesn't have timestamps,
> so the first decoded frame has PTS 0, and

wrong, the first frame can have a non zero PTS and is stored in the

> the following ones increment it by 1/framerate.

wrong, wrong and more wrong
1. try cbr audio in avi
2. try mpeg4 with b frames in avi
3. be unlucky and realize that some software generates variable fps avis.
4. subtitles ;)

> Simple.

yes i also think its simple.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I hate to see young programmers poisoned by the kind of thinking
Ulrich Drepper puts forward since it is simply too narrow -- Roman Shaposhnik
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