[theora] OGM Container?

Ralph Giles giles at xiph.org
Wed Oct 8 04:49:59 PDT 2003

On Wed, Oct 08, 2003 at 01:31:38PM +0200, Prodoc wrote:

> Can you tell me if OGM is the official name of the container used for 
> e.g. video?

No, the official name is Ogg and the recommended filename extension is 
.ogg for all Ogg bitstream files, regardless of content.

> If yes, where do the characters OGM stand for?

Ogg Movie? This extension was promulgated by a set of windows-oriented 
tools, originally to describe "DivX;-)" (beta mpeg-4) encoded video 
and Vorbis encoded audio in an Ogg container bitstream. Now I think the 
tools are more general.

See for example the *nix-oriented 'ogmtools' package 
<http://www.bunkus.org/videotools/ogmtools/> spun off from that project 
(and some experimental code from our cvs). It describes OGM as "Ogg 
media streams".

> Or is just OGG  the name of the container?

Just Ogg. We've never endorsed the .ogm extension or any other 
description of Ogg bitstreams.

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