On Wed, May 26, 2010 at 07:18:20AM +0200, Guillaume wrote: > On a side note, I tried some other things to have it playing properly: > I manually edited the video file in hexa to replace the string SIPP by > xvid. Doing that made the video perfect with the current ubuntu > mplayer (MPlayer SVN-r1.0~rc3+svn20090426-4.4.3): fluid, no dropped > frame, no verbosity. This sounds like one of the Xvid bug-workarounds need to be enabled in the decoder. I think it is possible to force them with some -lavfdopts option for testing to figure out which it is. Possibly related to packed B-frames?