[MPlayer-users] DivX/XviD qpel decoding

[Corey Hickey]

Jakub Misak wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hi,
> 
> I noticed that MPlayer with libavcodec can't properly decode video encoded 
> with DivX 5.1 (possibly XviD, too) and Qpel. There are some slightly 
> distorted "waves" in some parts of the picture, which disappear with the next 
> keyframe. It's quite subtle and noticeable only in some particular places, 
> but the artifacts are not there with the DivX 5.0.5 decoder.
> 
> I'm using MPlayer 1.0-pre2 (couldn't try CVS as it doesn't compile on my 
> machine), I tried all -lavdopts bug, er, ec, idct (0-7) options mentioned in 
> the man page, but nothing helps, in fact some of the suggested DivX/XviD qpel 
> bug options cause chroma smearing. Are there any hidden undocumented lavc 
> decoding workarounds or is it a bug? I've uploaded a short sample to 
> mplayerhq.hu/MPlayer/incoming - the DivX51-Qpel files.
> 

You should probably forward this to the ffmpeg-devel list:
ffmpeg-devel at lists.sourceforge.net

-Corey