[MPlayer-users] Re: OGM play back ?

[ChristianHJW]

TO : Mplayer-user ML
CC : MCF-General ML

"|TEcHNO|" <techno at punkt.pl> schrieb im Newsbeitrag
news:3D527337.6010407 at punkt.pl...
> Just wondering what .OGM file are for ?
> techno at punkt.pl


These are real OGG container files, see www.xiph.org for more information.
Ogg is a generic A/V container format and can contain more than 32 Billion
( forgot the precise number, forgive me ;-)  ) independant audio / video /
subtitles / idontknow streams.

While Ogg was used for containing the wonderful and excellent sounding
Vorbis audio streams first, many people are now swobing codec and container
and are calling 'Vorbis' streams 'Ogg' streams, being technically incorrect,
because Ogg is the container and can also contain a MP3 or PCM audio
strream, as well as one or more DivX, XviD video and subtitles streams.

The first tool to mux DivX video with Vorbis audio into an Ogg container was
created by Tobias Waldvogel for Windows ( http://tobias.everwicked.com ).
His muxer was created as a DirectShow Filter and had to be handled using
Graphedit on Windows. As many audio playback applications such as winamp
were registering the .ogg extension on Windows and trying to play the new
A/V Ogg streams and crashed on them it was decided in a historic chat (
Doom9, everwicked, Tobias, Ingo Ralf Blum and a few other important members
of the DivX scene participated here ) to use a new extention for A/V files,
being .ogm for 'Ogg Media'  .

Ogg had an incredible success and was quickly accepted by the more
experienced DivX users, mainly because many well-known MPEG4 sites like
www.doom9.org, www.powerdivx.com and www.everwicked.com were pushing it as a
replacement for good old, but outdated AVI. Mplayer was the first ( and only
? ) Linux player to have .ogm support, and meanwhile there are wonderful
tools for creating Oggs on Linux also, coded by Moritz Bunkus. First
incompatibilities between Windows and Linux version seem to be resolved now.

The Ogg container is currently the only format that can really contain
Vorbis audio together with XviD or DivX video, and Vorbis outperforms most
other audio codecs in the interesting bitrate range of 64 - 128 kbps, even
AAC and WMA, not to mention MP3.
( FYI : There was a pretty interesting blind ABX test of 64 kbps audio
codecs on hydrogenaudio.org : MP3Pro won, followed by Vorbis 1.0 !! )

A nice comparison between AVI, Ogg and MCF ( new format, not even alpha
stage now ) was created months ago by Ingo Ralf Blum and can be found here :
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/*checkout*/mcf/doc/container_
comparison.html?content-type=text/html .

Best regards

Christian
MCF development team

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