1.1.1
/ 1 October 2009; 14 years ago (2009-10-01)[5]
Preview release
1.2.0 Alpha 1
/ 24 September 2010; 13 years ago (2010-09-24)[6]
Written in
C
Operating system
Unix-like (incl Linux, Mac OS X), Windows
Type
Video codec, reference implementation
License
3-clause BSD
Website
www.theora.org
Theora is a free lossy video compression format.[7] It was 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.
The libtheora video codec is the reference implementation of the Theora video compression format developed by the Xiph.Org Foundation.[8][9]
Theora was 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 it lacked 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 was named after Theora Jones, Edison Carter's Controller on the Max Headroom television program.[10]
^Giles, Ralph (1 June 2004). "Theora I bitstream freeze". theora-dev (Mailing list). Retrieved 25 September 2009.
^"Theora Specification" (PDF). Xiph.Org Foundation. 16 March 2011. Retrieved 31 January 2012.
^"PlayOgg! – FSF – Free Software Foundation". 17 March 2010. Retrieved 1 October 2013.
^"Theora FAQ". Xiph.org. 2016. Archived from the original on 26 September 2020. Retrieved 1 December 2021.
^"Theora 1.1.1 release". Xiph.Org Foundation. Retrieved 6 October 2009.
^"libtheora 1.2.0alpha1 release". Xiph.Org Foundation. September 2010. Retrieved 10 October 2010.
Theora is a free lossy video compression format. It was developed by the Xiph.Org Foundation and distributed without licensing fees alongside their other...
codec. On2 declared Theora to be the successor in VP3's lineage.[citation needed] Theora developers declared a freeze on the Theora I bitstream format...
Theora Stephens is an American hairdresser widely credited with a 1980 patent for "a more efficient pressing and curling iron." Another source says Stephens...
text (such as subtitles), and metadata. In the Ogg multimedia framework, Theora provides a lossy video layer. The audio layer is most commonly provided...
designer, actress, and television presenter. She is known for her roles as Theora Jones in Max Headroom and as Tina McGee in The Flash and the 2014 series...
Theora lubrica is a bivalve mollusc endemic to the Northwest Pacific, including northern Japan, southern Russia and Hong Kong. It was introduced into harbours...
Theora Hamblett (January 15, 1895 – March 6, 1977) was an American painter, one of the first Mississippi folk artists to achieve national prominence. Hamblett's...
over standard HTTP, video as WebM or Theora over HTTP, and MP3, AAC, and NSV over the SHOUTcast protocol. Theora, AAC, and NSV are only supported in version...
Belenois theora, the forest caper white, is a butterfly in the family Pieridae. It is found in Guinea, Liberia, Ivory Coast, Ghana, Togo, Benin, Nigeria...
length data. "Theora format specification" (PDF). (827 KB) Requires about 3 terabytes per uncompressed frame at maximum resolution (pg 37, Theora I Specification...
Theora mesopotamica is a species of saltwater and brackish water clam, a bivalve mollusk in the family Semelidae. This species is known from the northwestern...
GStreamer and GTK+. Thoggen can back up DVDs by re-encoding them using the Ogg Theora video codec. Thoggen is designed to be easy and straightforward to use....
convert the downloaded files to other file formats such as MP3, MPEG4, OGG Theora or WMV. It is published as free software under the terms of the GPL-3.0-or-later...
files. Opera 10.5 browser has support for Vorbis audio, WAVE PCM audio and Theora video. The game design software RPG Maker MV, released in October 2015,...
Theo (1928–2019) and Ora (1931–2021) Coster are the founders of Theora Concepts; they were a married Israeli couple and inventors of about 200 games and...
banner. Xiph.org is home to other free compression formats such as Vorbis, Theora, Speex and Opus. Version 1.3.0 was released on 26 May 2013, at which point...
support H.264, while Mozilla and Opera support Ogg Theora (now Google, Mozilla and Opera all support Theora and WebM with VP8). Microsoft, with the release...
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