World Library  
Flag as Inappropriate
Email this Article

List of open-source codecs

Article Id: WHEBN0003005978
Reproduction Date:

Title: List of open-source codecs  
Author: World Heritage Encyclopedia
Language: English
Subject: OpenH264, Free software lists and comparisons, M4V
Publisher: World Heritage Encyclopedia

List of open-source codecs

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 codec 1
  • Audio codec 2
  • See also 3
  • References 4

Video codecs

  • x264H.264/MPEG-4 AVC implementation. x264 is not a codec (encoder/decoder); it is just an encoder (it cannot decode video).
  • OpenH264 – H.264 encoding and decoding
  • x265 – An encoder based on the High Efficiency Video Coding (HEVC/H.265) standard.
  • XvidMPEG-4 Part 2 codec, compatible with DivX
  • libvpxVP8 and VP9 implementation; formerly a proprietary codec developed by On2 Technologies, released by Google under a BSD-like license in May 2010.
  • FFmpeg codecs – Codecs in the libavcodec library from the FFmpeg project (FFV1, Snow, MPEG-1, MPEG-2, MPEG-4 part 2, MSMPEG-4, WMV2, SVQ1, MJPEG, HuffYUV and others). Decoders in the libavcodec (H.264, SVQ3, WMV3, VP3, Theora, Indeo, Dirac, Lagarith and others).
  • Lagarith – Video codec designed for strong lossless compression in RGB(A) colorspace (similar to ZIP/RAR/etc.)
  • libtheora – A reference implementation of the Theora format, based on VP3, part of the Ogg Project
  • Dirac as dirac-research, a wavelet based codec created by the BBC Research, and Schrödinger, an implementation developed by David Schleef.[1]
  • HuffyuvLossless codec from BenRG
  • High Efficiency Video Coding (HEVC or H.265) and VP9.

Audio codecs

  • Xiph.Org Foundation.
  • LAME – Lossy compression (MP3 format).
  • TooLAME/TwoLAME – Lossy compression (MP2 format).
  • Musepack – Lossy compression; based on MP2 format, with many improvements.
  • Xiph.Org Foundation. Deprecated in favour of Opus according to
  • CELT – Lossy compression for low-latency audio communication
  • Opus – The IETF standards-track successor to CELT.(Opus support is mandatory for WebRTC implementations.)
  • 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


  1. ^
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.