Hi everybody:
Here is the latest edition of Ogg Traffic. The HTML version is at
http://www.vorbis.com/ot/20030429.html
Enjoy!
-Carsten
<p>Ogg Traffic for Tuesday, April 29, 2003
[1]Carsten "Purple" Haese
April 29, 2003
_________________________________________________________________
Table of Contents
1. Status Updates
1.1. Monty
1.2. Stan Seibert
1.3. Michael Smith
1.4. Karl Heyes
1.5. Oddsock
2. Interesting Discussions
2.1. Appending an Ogg file to another
3. Recent Developments
3.1. Emmett Plant leaves Xiph.org
3.2. Independent Label considers going Vorbis
3.3. Theora support coming to Xine
3.4. Xiph.org News Feed
[2]Previous Issues of Ogg Traffic
1. Status Updates
1.1. Monty
Monty is continuing his crusade to reduce memory usage in Tremor to
the bare essentials. Most recently, he tackled the inverse MDCT. It is
now done fully in-place, without any working memory needed beyond the
buffer for the current window. He also reduced unnecessary memory
accesses, and the last stage of the MDCT now renders directly into the
PCM output buffer.
1.2. Stan Seibert
Stan is making good progress on Positron and its technical
documentation. It is not ready for public tinkering yet, but he
reports that it can successfully upload MP3 files to the Neuros.
1.3. Michael Smith
Mike committed more icecast bug fixes, added a helpful explanation to
the example configuration file, and committed a patch to support
aliasing, contributed by Paul Donohue.
1.4. Karl Heyes
Karl fixed a nasty off-by-one bug in libshout and continued to inject
sanity into the icecast autotools setup.
1.5. Oddsock
Oddsock cleaned up the icecast win32 build, added a console mode to
the icecast win32 version, and added support for sending "What's
Playing" information to the yp server.
2. Interesting Discussions
2.1. Appending an Ogg file to another
This question comes up once in a while, so I guess it's time to
provide a tiny How-To for appending an Ogg file to another. Dominic
Mueller [3]surmises in this message that it can't be as easy as
simply concatenating two Ogg files. Or can it?
The answer is a resounding, Yes, it is that easy! One key feature of
the Ogg container format is that you can append one song to another by
simple file concatenation. The result of such a concatenation is one
physical bitstream (i.e. one file) that contains two or more logical
bitstreams. Such constructs are allowed and encouraged by the
specification, and they are just one more example of why Ogg is really
cool technology.
As far as Dominic's worry about multiple Vorbis comments is concerned,
this is really no problem. Each logical bitstream does retain its
comments, but this is an asset, not a liability. A Vorbis player
program should display the comments for the current logical bitstream
and update its display to reflect the changes in comments from one
logical bitstream to the next. So if you have larger works that
consist of separate parts, you can rip and tag each part individually.
After concatenating the parts, you can listen to the work as a whole,
and the player will always tell you which part you're listening to!
3. Recent Developments
3.1. Emmett Plant leaves Xiph.org
The Xiph.org Foundation announced [4]in this press release the
termination of its contract with Emmett Plant, who acted as CEO of
Xiph.org since May 2002. Now that Xiph.org is a federal tax-exempt
non-profit organization under section 501(c)3, it needs to find a
better balance between private and public funding. Emmett's work was
very helpful in raising corporate awareness of Vorbis and in making
portable Vorbis support a reality, but Xiph.org must now refocus on
public interests.
3.2. Independent Label considers going Vorbis
[5]This message reports that [6]Fat Chuck's Music, an independent
music label that gives artists 100% of the profit from the sales of
their music, is considering moving to Ogg Vorbis as its official
format for online music distribution. This report is currently
unconfirmed, but if this is true, this is yet another step towards
broad public acceptance of Ogg Vorbis.
3.3. Theora support coming to Xine
[7]Andreas Heinchen informs us that he has begun, and almost
completed, adding support for [8]Theora to [9]Xine. Player support
is an important prerequisite for codec adoption, so Andreas' efforts
to integrate Theora into Xine are certainly appreciated. Good luck,
Andreas!
3.4. Xiph.org News Feed
Nathan has set up an RSS feed that will serve up all the latest
Xiph.org news. This feed can be aggregated into other web pages, or
you can use an RSS viewer (like e.g. Evolution's summary page) to get
Xiph.org news without a web browser. The feed is available at
[10]http://www.xiph.org/feeds/xiph.xml.
References
1. mailto:carsten@xiph.org
2. http://www.vorbis.com/ot/
3. http://www.xiph.org/archives/vorbis/200304/0106.html
4. http://www.xiph.org/press/2003/ceo/
5. http://www.xiph.org/archives/vorbis/200304/0117.html
6. http://www.fatchucks.com/z1.html
7. http://www.xiph.org/archives/theora/200304/0002.html
8. http://www.theora.org/
9. http://xine.sourceforge.net/
10. http://www.xiph.org/feeds/xiph.xml
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