Free lossy video compression format / From Wikipedia, the free encyclopedia

Dear Wikiwand AI, let's keep it short by simply answering these key questions:

Can you list the top facts and stats about Theora?

Summarize this article for a 10 years old


Theora is a free lossy video compression format.[7] It is developed by the Xiph.Org Foundation and distributed without licensing fees alongside their other free and open media projects, including the Vorbis audio format and the Ogg container.

Quick facts: Filename extension, Internet media type,...
Filename extension
.ogv, .ogg
Internet media type
Initial release1 June 2004 (2004-06-01)[1]
Latest release
Theora I
16 March 2011[2]
Type of formatVideo coding format
Contained byOgg, Matroska
Extended fromVP3
Open format?Yes[3]
Free format?Yes[4]
Quick facts: Developer(s), Initial release, Stable release...
Initial release3 November 2008 (2008-11-03) (1.0)
Stable release
1.1.1 / 1 October 2009; 13 years ago (2009-10-01)[5]
Preview release
1.2.0 Alpha 1 / 24 September 2010; 13 years ago (2010-09-24)[6]
Written inC
Operating systemUnix-like (incl Linux, Mac OS X), Windows
TypeVideo codec, reference implementation
License3-clause BSD

The libtheora video codec is the reference implementation of the Theora video compression format being developed by the Xiph.Org Foundation.[8][9]

Theora is derived from the formerly proprietary VP3 codec, released into the public domain by On2 Technologies. It is broadly comparable in design and bitrate efficiency to MPEG-4 Part 2, early versions of Windows Media Video, and RealVideo while lacking some of the features present in some of these other codecs. It is comparable in open standards philosophy to the BBC's Dirac codec.

Theora is named after Theora Jones, Edison Carter's Controller on the Max Headroom television program.[10]