List of open-source codecs

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This is a listing of open-source implementations of media formats—usually called codecs. Many of the codecs listed implement media formats that are restricted by patents and are henceforth not open formats. For example, x264 is a widely used open source implementation of the heavily patent encumbered MPEG-4 AVC media format.

Video codecs

Audio codecs

  • FLAC – Lossless codec developed by Xiph.Org Foundation.
  • LAME – Lossy compression (MP3 format).
  • TooLAME/TwoLAME – Lossy compression (MP2 format).
  • Musepack – Lossy compression; based on MP2 format, with many improvements.
  • Speex – Low bitrate compression, primarily voice; developed by Xiph.Org Foundation. Deprecated in favour of Opus according to www.speex.org.
  • CELT – Lossy compression for low-latency audio communication
  • Opus – The IETF standards-track successor to CELT.(Opus support is mandatory for WebRTC implementations.)
  • libvorbis – Lossy compression, implementation of the Vorbis format; developed by Xiph.Org Foundation.
  • iLBC – Low bitrate compression, primarily voice
  • iSAC – Low bitrate compression, primarily voice; (free when using the WebRTC codebase)
  • TTA – Lossless compression
  • WavPack – Hybrid lossy/lossless
  • Bonk – Hybrid lossy/lossless; supported by fre:ac (formerly BonkEnc)
  • Apple Lossless – Lossless compression (MP4)
  • Fraunhofer FDK AAC – Lossy compression (AAC)
  • FFmpeg codecs in the libavcodec library, e.g. AC-3, AAC, ADPCM, PCM, Apple Lossless, FLAC, WMA, Vorbis, MP2, etc.
  • FAAD2 – open-source decoder for Advanced Audio Coding. There is also FAAC, the same project's encoder, but it is proprietary (but still free of charge).
  • libgsm – Lossy compression (GSM 06.10)
  • opencore-amr – Lossy compression (AMR and AMR-WB)
  • liba52 – a free ATSC A/52 stream decoder (AC-3)
  • libdca – a free DTS Coherent Acoustics decoder
  • Codec2 - Lossy compression

See also

References

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