Theora is a relative new video file format from the people behind the Vorbis audio format, music files
with the extension .ogg. Theora files and Vorbis files use the same multimedia container format
(file format) called OGG, in windows sound files normally have the ogg extension while video files have
the .ogm extension
Theora is an open format, BSD-style license, that does not require royalty or licensing fees and can be used
freely in open source as well as comercial applications. Source code and binary files can be downloaded from the
xiph site. Compression and quality for Theora files is about the same as for DivX, MPEG-4
and other modern video compression formats.