Ogg

Ogg is a <a href="/facts/Digital_data/JChckAvr">digital</a> multimedia <a href="/facts/Container_format_(digital)/mSfwwdSA">container format</a> designed to provide for efficient <a href="/facts/Streaming_media/4rPhSq0Y">streaming</a> and manipulation of digital <a href="/facts/Multimedia/PtJteq27">multimedia</a>. It is maintained by the <a href="/facts/Xiph.Org_Foundation/HJCFzyyx">Xiph.Org Foundation</a> and is <a href="/facts/Free_file_format/TKcCW6mA">free</a> and <a href="/facts/Open_format/TKcCW6mA">open</a>, unrestricted by <a href="/facts/Software_patent/wI6RrYh3">software patents</a>. Its name is derived from "ogging", <a href="/facts/Jargon/eI6scBdF">jargon</a> from the computer game <a href="/facts/Netrek/EEGVMLcq">Netrek</a>.[better source needed]
The Ogg container format can <a href="/facts/Time-division_multiplexing/tv7bMh1v">multiplex</a> a number of independent <a href="/facts/Stream_(computing)/2jtBAp0U">streams</a> for <a href="/facts/Sound/DlKXlPuF">audio</a>, <a href="/facts/Video/F1AV8ben">video</a>, text (such as <a href="/facts/Subtitles/9srhQPhl">subtitles</a>), and <a href="/facts/Metadata/qt35z79C">metadata</a>. In the Ogg multimedia framework, <a href="/facts/Theora/RnlKRQBb">Theora</a> provides a <a href="/facts/Lossy/jHW7DDv3">lossy</a> video layer. The <a href="/facts/Audio_coding_format/qHAhppfD">audio layer</a> is most commonly provided by the music-oriented <a href="/facts/Vorbis/rqJDTF0T">Vorbis</a> <a href="/facts/Bitstream_format/CPuf17up">format</a> or its successor <a href="/facts/Opus_(audio_format)/VP4KuGre">Opus</a>. <a href="/facts/Lossless_compression/LS702KsN">Lossless</a> audio compression formats include <a href="/facts/FLAC/TbqpHlWy">FLAC</a>, and <a href="/facts/OggPCM/KF4j68N7">OggPCM</a>.
Until 2007, the .ogg <a href="/facts/Filename_extension/cJgfAym4">filename extension</a> was used for all files whose content used the Ogg container format. Since then, the Xiph.Org Foundation recommends that .ogg only be used for Ogg Vorbis audio files. Xiph.Org decided to create a new set of file extensions and media types to describe different types of content such as .oga for audio only files, .ogv for video with or without sound (including Theora), and .ogx for multiplexed Ogg.
Ogg's various <a href="/facts/Codec/C7b7Am8t">codecs</a> have been incorporated into a number of different free and <a href="/facts/Proprietary_software/9zcskxYL">proprietary</a> <a href="/facts/Media_player_(application_software)/AwtCuWfG">media players</a>, both commercial and non-commercial, as well as <a href="/facts/Portable_media_player/2yHdHHKv">portable media players</a> and <a href="/facts/GPS/DKVLnzF3">GPS</a> receivers from different manufacturers.
As of November 7, 2017, the current version of the Xiph.Org Foundation's reference implementation is libogg 1.3.3. Another version, libogg2, has been in development, but is awaiting a rewrite as of 2018. Both <a href="/facts/Library_(computing)/xRzL3P7q">software libraries</a> are <a href="/facts/Free_software/IaoVtJXn">free software</a>, released under the <a href="/facts/New_BSD_License/XLtmLp5x">New BSD License</a>. Ogg reference implementation was separated from Vorbis on September 2, 2000.

Ogg open-in-new

Ogg