ada@www /tmp $ mplayer -vc help | grep -i msmpeg
ffdivx      ffmpeg    working   FFmpeg DivX ;-) (MSMPEG-4 v3)  [msmpeg4]
ffmp42      ffmpeg    working   FFmpeg MSMPEG-4 v2  [msmpeg4v2]
ffmp41      ffmpeg    working   FFmpeg MSMPEG-4 v1  [msmpeg4v1]
divxds      dshow     working   DivX ;-) (MSMPEG-4 v3)  [divx_c32.ax]
divx        vfw       working   DivX ;-) (MSMPEG-4 v3)  [divxc32.dll]