VLC

VLC is a media player/converter program which may be of use in moving video and audio files from one format to another. It is free and open source, and has an orange and white striped construction cone as its icon. It is available for a number of platforms, including Windows, Mac, and Linux.

Formats supported
(can vary by platform)

Video

 * Cinepak
 * Dirac
 * DivX (1/2/3/4/5/6)
 * DVD
 * H.264
 * MPEG (1/2/4)
 * OGG (Theora)
 * QuickTime
 * WMV (1/2/3/9)

Audio

 * AC3
 * ADPCM
 * ALAC
 * Amiga Module
 * ATRAC
 * CD
 * DTS
 * FLAC
 * Impulse Tracker module
 * LPCM
 * MIDI 3
 * MLP
 * Monkey's Audio
 * MP3
 * MP4 (AAC)
 * Musepack
 * Ogg (Vorbis)
 * QCELP
 * QuickTime
 * Real Audio
 * Scream Tracker 3 module
 * Speex
 * True Audio (TTA)
 * Wavpack
 * WMA 1/2/3

Links

 * Official site with downloads
 * Installing VLC might void your Dell speaker warranty!