[Ffmpeg-devel] Re: lavc mpeg4 with b frames in mov/mp4
Sat May 20 14:55:29 CEST 2006
> Michael Niedermayer wrote:
> > Hi
> > On Fri, May 19, 2006 at 10:44:37AM +0200, Baptiste Coudurier wrote:
> >> Hi
> >> While testing lavc mpeg4 in mov/mp4, I noticed that quicktime player
> >> does not play a stream with B frames;
> > elaorate please, what happens?
> Blank screen, as usual when quicktime player cannot decode the stream.
> >> ctts is correct though. Weird
> >> thing is that xvid streams are correctly played.
> > xvid encoded with ffmpeg -vcodec xvid?
> > [...]
> Yes. 'ctts' is wrong with xvid since pts are not correctly computed but
> still the picture is decoded.
till now quicktime didnt handle mpeg-4 asp (and therefore no b-frames), it
only handles simple profile
are you sure that in the xvid sample it really decodes also the b-frames (or
simply skips them)?
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