MPlayer is a movie player for Linux (runs on many other Unices, and non-x86 CPUs, see the documentation). It plays most MPEG, VOB, AVI, Ogg/OGM, VIVO, ASF/WMA/WMV, QT/MOV/MP4, FLI, RM, NuppelVideo, YUV4MPEG, FILM, RoQ, PVA files, supported by many native, XAnim, and Win32 DLL codecs. You can watch VideoCD, SVCD, DVD, 3ivx, DivX 3/4/5 and even WMV movies, too (without the avifile library).
Requires libmad,
lzo [pkg],
lame [pkg],
faac [pkg], cdparanoia, libungif, fribidi, x11, gtk+2, atk, pango, aalib, sdl, arts, esound, audiofile, and
jack [pkg].