[vorbis-dev] Re: Header structure for "video" stream ?
dan at on2.com
Fri Sep 6 08:11:57 PDT 2002
you may also want to check out the www.theora.org site (another xiph project), where we are defining a video /audio ogg bitstream based (initially at least) on the VP3 codec. This work should map cleanly to other codecs, and hopefully will become the canonical specification for including video in OGG.
From: ChristianHJW [mailto:christianhjw at users.sourceforge.net]
Sent: Fri 9/6/2002 9:13 AM
To: vorbis-dev at xiph.org
Subject: [vorbis-dev] Re: Header structure for "video" stream ?
"Philippe DUBY" <p.duby at asi.fr> schrieb im Newsbeitrag
news:18.104.22.168.2.20020906093146.0513c090 at mail.asi.fr...
> I am writing a tool that gives information on movie files
(http://avicodec.duby.info/) and I want to add ogg support.
> I have found full of information on ogg file format, vorbis file format,
but nothing on the "video" bitstreams that I can found in some ogg files
(with XVID movies mixed with vorbis audio for example).
> I can see that the "video" structe looks like this, but I'm searching
information on what I call Dummy fields :
> struct OGG_Video
the Ogg streams you found are not official Ogg streams, but a 'hack' created
by Tobias Waldvogel ( closed source ) and use a basic Directshow
implementation mainly targeted for Windows.
However, Moritz Bunkus has created suitable tools for Linux recently to be
found here : http://www.bunkus.org/videotools/ogmtools/index.html
He is a very nice and clever guy and obviously managed to reverse engineer
Tobias implementation ( maybe with Tobias' help ?? ), as the files created
on Linux are about 95% compatible with Tobias' Dshow filters for Windows (
some minor probs with order of audio streams ). He might be able to help you
i guess ....
Sites : http://mcf.sourceforge.net
MCF mailing lists : news://news.gmane.org
Soon : www.corecodec.com
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