Theora is a free, lossy video compression format believed to be patent unencumbered. Originally based on TrueMotion VP3 from On2 Technologies which released it to the free software community, it is developed by the Xiph.Org Foundation and is comparable to Xvid regarding compression efficiency. Most of the time is it found muxed with Vorbis audio in an Ogg container with the .ogv file extension.

It is used for the video tag of HTML5 in several browsers such as Mozilla Firefox, Google Chrome, Chromium, Opera, SeaMonkey and can also be viewed in Safari if the Xiph QuickTime Components are installed.

Related categories 3

Theora
Open video codec that can compete with MPEG-4 format. News, source-code, and FAQ.
ffmpeg2theora
Open source, command line converter to create Ogg Theora files. News, download links, examples.
Flossmanuals: Ogg Theora Cookbook
A free manual explaining the codec and the tools to cut, split, resize, convert and otherwise manipulate video files in this format.
Free Electrons: Ogg/Theora Video Mini Howto
A short tutorial explaining how to shoot, capture and convert videos to this format.
Streamnik
Provides a number of free applications for internet web streaming in the free Ogg Theora format. News, download links, documentation including screencasts.
Tagtheora
A simple Python script which can change metadata tags of an Ogg Theora file.
TheoraPlay
Free software library in C which aims to make decoding of this format easier.
Thoggen
Open source DVD backup and ripping utility for GNU/Linux that encodes in Theora. Documentation, screenshots, download links.
VideoBin
Hosting site for videos in Ogg Theora format, features an API and embedding in third party sites.
Videos for the Web with HTML 5 - an Introduction
The HTML5 video tag, browser support, converting videos into an HTML5 supported format.
[Cinema_Mozilla]
Last update:
March 20, 2016 at 5:15:02 UTC
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