[Ffmpeg-devel] Re: Raw h261 broken

Michael Niedermayer michaelni
Mon Aug 21 03:25:18 CEST 2006


On Mon, Aug 21, 2006 at 01:56:22AM +0200, Baptiste Coudurier wrote:
> Hi
> Diego Biurrun wrote:
> >> [...]
> >>
> >> btw do these decode correctly with any (binary) decoder?
> > 
> > lotr.mov plays correctly in QT 7.0.0 and 7.1.2 on Mac OS X.  I found a
> > H.261 decoder in the QT DLLs with the help of Compn on IRC that worked
> > flawlessly on x86 Linux with MPlayer's native demuxer, but it fails with
> > libavformat.  So lotr.mov should be a valid file, but the libavformat
> > MOV demuxer is still buggy about it.
> Yes. Qt binary codecs with lavf demuxer wont work in mplayer since
> vd_qtvideo.c passes whole 'stsd' atom to codec. demuxer_mov.c stores
> whole 'stsd' atom in ImageDesc which is passed to qt codec.

libmpdemux/demux_lavf should initalize everything so binary codecs work
if it does not its buggy

> > [...]
> I don't know if lavf demuxer reports wrong size since it reports what is
> stored in mov file, quicktime also says 320x200.

H.261 supports 2 sizes 176x144 and 352x288 so it cant be 320x200

> Maybe it is a decoder problem ?

very possible

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In the past you could go to a library and read, borrow or copy any book
Today you'd get arrested for mere telling someone where the library is

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