MediaCoder is a free universal audio/video batch transcoder, putting together lots of excellent audio/video codecs and tools from the open source community into an all-in-one solution, capable of transcoding among different audio/video formats with many extra features.

Typical applications:
- Improving compression / reducing file size
- Converting from lossless/high-bitrate audio to low-bitrate audio to play with portable DAP
- Converting to device (mobile phone, PDA, MP4 player, PSP, VCD/DVD player)
- Extracting audio tracks from video clips
- Ripping CD/VCD/DVD

Supported source formats:
- Audio: MP3, OGG/Vorbis, AAC, MusePack, WMA, RealAudio, FLAC, WavPack, APE/APL, WAV
- Video: AVI (Xvid/DivX/H.264), MPEG1/2/4, QuickTime (mov), WMV/ASF, RealMedia (rmvb), MP4, Matroska (mkv)
CUE Sheets, CD, VCD, DVD

Supported target audio formats:
- Lossy: MP3, OGG/Vorbis, AAC, AAC+/Parametric Stereo, MusePack, WMA
- Lossless: FLAC, WavPack, Monkey's Audio (APE), WMA Lossless, WAV

Supported target video formats:
- H.264, Xvid, DivX 4/5, MPEG1/2/4, H.263 etc.

Supported target container formats:
- AVI, MPEG, Matroska, MP4, PMP (PSP Media Player Format)