[XviD-devel] Invalid stuffing bits and divx 5.0.3 qpel

[Christoph Lampert]

On Tue, 18 Mar 2003, Michael Niedermayer wrote:

> Hi
> 
> On Tuesday 18 March 2003 20:39, Michael Niedermayer wrote:
> > Hi
> >
> > On Tuesday 18 March 2003 19:59, b0b0l0l0 at free.fr wrote:
> > > En réponse à Christoph Lampert <chl at math.uni-bonn.de>:
> >
> > [...]
> >
> > > > At the end of VOP, BitstreamPadAlways() is required, if I remember
> > > > correctly.
> > >
> > > You're right.
> > >
> > > By the way, I've also noticed some problems with divx pro 5.0.3 qpel. The
> > > bitstream generated by divx with qpel enabled produces some chroma
> > > glitches once decoded with xvid or other mpeg4 codec (3ivx, momusys,
> > > etc). According to their changelog, they are supposed to comply with
> > > 14496-2 DCOR1 (N4740) but I can't manage to decode their stream with any
> > > decoders. Have you any
> >
> > ffdshow/ffmpeg/mplayer should decode it correctly, if not then upload a
> > sample file to ftp://mplayerhq.hu & tell me that u did
> 
> btw, IIRC its some chroma MV rounding bug in divx 503 which causes this

Do you have a sample? As far as I heard, DivXnetworks believes QPel chroma 
is finally handled correctly. 

gruel