by Qyot27 » Mon Jan 28, 2008 4:58 am
SMPlayer>>>>>>>>>>>>>VLC on Windows
Or the CCCP (manually, this would probably just require installing a recent build of ffdshow-tryouts and configuring it for H.264 and the MPEG-4 ASP variants and for AAC audio, Haali's Media Splitter, and VSFilter, although I think they include some other stuff in there too - for most MP4 or MKV files it would be those three I just listed though).
On OSX, you have VLC, mplayer (the official one, from just looking around most Mac-centric forks of the project tend to be outdated), the Perian QT component, and there's another QT component that properly handles what Perian doesn't, can't remember what it is but I did see it linked to on doom9.
On Linux, definitely mplayer (or SMPlayer, considering they're virtually the same, except for the GUI).