[Ffmpeg-devel] VP3 decoding issue

[Michael Niedermayer]

Hi

On Tue, Oct 25, 2005 at 04:24:08PM -0600, Mike Melanson wrote:
> Derk-Jan Hartman wrote:
> >On 12-okt-2005, at 21:52, matthieu castet wrote:
> >
> >>Derk-Jan Hartman wrote:
> >>
> >>>Apparently a while ago VP3 decoding stopped working in VLC and  ffmpeg.
> >>>http://sidekick.student.utwente.nl/videolan/VP3-Artifact.mov
> >>>
> >>Server returned 403: Forbidden ....
> >>
> >>
> >>Does it play fine with vp3 binary decoder.
> >>If it works with previous version of ffmpeg, could you find which  
> >>commit break it ?
> >
> >
> >All my VP3 NSV streams that i tested are broken, and I traced the bug  
> >to vp3.c 1.51 -> 1.52
> >
> >revision 1.52
> >date: 2005/05/17 23:39:23;  author: melanson;  state: Exp;  lines:  +45 -11
> >use VLCs for in place of get_fragment_run_length(), get_mode_code(), and
> >get_motion_vector_vlc()
> >
> >Something there broke vp3 on MacOS X PPC.
> >Anyone could help me getting any further from this point?
> 
> 	I made those changes (as the CVS notes). I remember validating the 
> changes extensively. Is it possible that the PPC's VLC readers are 
> messed up? Some weird optimizations that are not returning the correct 
> numbers?

maybe compare the output when TRACE is defined on PPC and X86
note, TRACE should output ALOT of detail about what the the bitstream reader
reads

[...]

-- 
Michael