http://www.mplayerhq.hu/homepage/design7/dload.html
try that, download the codec pack too
best media player period, blows anything else away even proprietary stuff, its so good many software companies have been using a modified mencoder .dll in windows apps for re-encoding video
compile as usual, run ./configure --help first though, that way you can select some more options, might wanna install lame,TooLame,Xvid and anything else you might wanna use with it first, that way MPlayer can be compiled to use them