This package contain video codecs for popular proprietary formats not natively supported by mplayer.

ati vcr-2 video codec.
cinepak video codec
divx ;-) video codec, ver. 3.11
divx ;-) video codec, ver. 4.x
indeo video 3.2/4.1/5.0/4.1 quick/5.0 quick codecs.
intel 263 video codec.
microsoft mpeg-4 video codec, beta version 3.0.0.2700
morgan multimedia motion jpeg video codec.
quicktime
realaudio
realvideo 8
realvideo 9
windows media video 9
and more...