[Ffmpeg-devel] H.264 decoding bug

[Diego Biurrun]

On Fri, Jan 05, 2007 at 05:27:56PM -0800, Nicholas Schell wrote:
> http://lists.mplayerhq.hu/pipermail/ffmpeg-user/2007-January/006054.html
> I previously responded to ffmpeg-user with the above linked report,
> but did not know much about the problem at the time.
> 
> However now I have much more information which may be of help in
> solving the bug. Thanks to nk215 asking about my thread on the mplayer
> IRC channel, I know at least that other individuals on linux can
> confirm the blocking in the samples with current ffmpeg builds. Just
> as well he also found exactly which ffmpeg revision seems to cause the
> problem, r6578.
> 
> I compiled ffplay myself with mingw to confirm his results. Revision
> 6577 shows none of the blocking, but 6578 does. It appears exactly the
> same as the blocking in current in builds. Also if there were some
> qualms about whether the files could in fact be the problem because of
> an error on part of the H.264 encoder used, I tested each file with
> the JVT reference H.264 decoder. All three files were decoded
> flawlessly with no blocking at all. Not that it would matter but
> CoreAVC also has no issues with these files.
> 
> The sample files are now located here
> http://samples.mplayerhq.hu/V-codecs/H264/

I can confirm the blocking artifacts.

Diego