[xiph-commits] r6987 - websites/theora.org
nilesh at dactyl.lonelymoon.com
nilesh
Mon Jul 5 01:54:13 PDT 2004
Author: nilesh
Date: Mon Jul 5 01:54:13 2004
New Revision: 6987
Added:
websites/theora.org/theorafaq_old.html
Removed:
websites/theora.org/theorafaq.html
Log:
moved theorafaq.html to theorafaq_old.html
Deleted: websites/theora.org/theorafaq.html
===================================================================
--- websites/theora.org/theorafaq.html 2004-07-05 08:50:55 UTC (rev 6986)
+++ websites/theora.org/theorafaq.html 2004-07-05 08:54:12 UTC (rev 6987)
@@ -1,390 +0,0 @@
-<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 TRANSITIONAL//EN"
- "http://www.w3.org/TR/html4/loose.dtd">
-<html>
-<head>
-<title>theora.org :: FAQ</title>
-<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
-<style type="text/css">
- @import url(style.css);
-</style>
-</head>
-<body bgcolor="#666699" text="#000000">
-<table width="500" border="0" cellspacing="0" cellpadding="2" align="center">
- <tr>
- <td bgcolor="#000000">
- <table width="100%" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td bgcolor="#EEEEEE" align="left">
- <table width="100%" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td valign="top" align="left">
- <table border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td width="50" height="50" bgcolor="#444466" class="tl">
- </td>
- <td align="right" valign="top">
- <table border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td bgcolor="#9898BA" width="25" height="25" class="tl"> </td>
- </tr>
- </table>
- </td>
- </tr>
- <tr>
- <td valign="bottom">
- <table border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td bgcolor="#9898BA" width="25" height="25" class="tl"> </td>
- </tr>
- </table>
- </td>
- <td valign="bottom"> </td>
- </tr>
- </table>
- </td>
- <td valign="top" align="right">
- <table border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td class="nutrition" align="right">
- <!-- Title (HINT: Shorter is better.)
--->theora.org<!-- Close Title -->
- </td>
- </tr>
- <tr>
- <td align="right">
- <table border="0" cellspacing="0" cellpadding="0">
- <tr>
- <!-- Menu (HINT: Each item is inside a <td>.)-->
- <td class="menu"> <a
-href="http://www.theora.org">Home</a></td>
- <td class="menu"><a
-href="http://www.theora.org/theorafaq.html">FAQ</a></td>
- <td class="menu"><a
-href="http://www.theora.org/lists.html">Mailing Lists</a></td>
- <td class="menu"><a
-href="http://www.theora.org/svn.html">SVN</a></td>
- <td class="menu"><a
-href="http://www.theora.org/contact.html">Contact</a></td>
- <td class="menu"><a
-href="http://www.xiph.org">Xiph.org</a></td>
- <!-- Close Menu -->
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </td>
- </tr>
- <tr>
- <td bgcolor="#EEEEEE">
- <table width="100%" border="0" cellspacing="0" cellpadding="0">
- <tr>
- <td valign="top">
- <table width="100%" border="0" cellspacing="0" cellpadding="10">
- <tr>
- <td>
- <!-- Main Content -->
-<b>[ The Glorious Theora FAQ - Alpha Two Update ]</b><br>
-<p>
-There's more delicious Theora on the way, the first part of which is the
-newest addition here, the Theora Video Layer FAQ, written by your pal and
-mine, Dan Miller. --Ed
-<p>
-<b>[ Dan's Glorious Theora Video Layer FAQ ]</b>
-<p>
-<b>Q: Is the Theora bitstream identical to VP3?</b>
-<p>
-A: Yes and No. Theora is a superset of VP3, so VP3 streams (with minor
-syntactic modifications) can be made into Theora streams without
-recompression (but not vice versa)
-<p>
-<b>Q: What can Theora do that VP3 couldn't do?</b>
-<p>
-A: The major change from VP3 to Theora is architectural. VP3, like most
-codecs of today, makes certain assumptions about the nature of the
-material it compresses. These assumptions take the form of fixed sets of
-numeric values, such as quantization matrices, which control how different
-frequency components of the signal are handled, and token frequency
-tables, which control the efficiency of post-transform lossless coding.
-In Theora, we have leveraged the intrinsic flexibility of the Ogg
-multimedia framework to allow the encoder to modify these values
-appropriately for the material. This simple, powerful approach has
-already been proven effective in Vorbis, and will allow for a longer cycle
-of encoder optimization without requiring client-side updates.
-<p>
-<b>Q: How will I transition my old VP3 files to the new format?</b>
-<p>
-A: Because Theora is a 'superset' of VP3, tools can easily be created that
-will allow VP3 files to be losslessly transcoded into Ogg Theora format
-with no loss in quality.
-<p>
-<b>Q: Can I convert Ogg Theora files into VP3?</b>
-<p>
-A: Why would you want to do something stupid like that? Are you nuts?
-<p>
-<b>Q: How will Ogg Theora interoperate with [insert your favorite media
-architecture]?</b>
-<p>
-A: As the Ogg Vorbis format has gained acceptance, components have become
-available to play Ogg files on practically all of the major media players.
-We expect a similar if not superior level of support for Ogg Theora.
-Developers wanted! (if you're interested, sign up for the
-theora-codecs at xiph.org mailing list).
-<p>
-<b>Q: This is great. When will it all be finished so I can use it right
-now, like this minute? Please?</b>
-<p>
-A: Ogg Theora was scheduled to go Beta (that means the bitstream is locked
-down, and all features are represented) in March of 2003. Obviously, that's
-slipped. Alpha 2 is
-going to be released shortly; but please remember that until Beta, there
-is no promise that files you encode will be supported in the final release.
-<p>
-<b>Q: So who cares about a new Alpha release?</b>
-<p>
-A: We encourage and depend on the open-source developer community to get
-involved early. We release Alpha builds to give these hearty souls a
-chance to see what's cooking, and perhaps to add some ingredients of their
-own. If you think you have the right stuff, please join the party at
-www.theora.org/lists.
-<p>
-<b>[ The Glorious Theora FAQ - Supplemental ]</b><br>
-<p>
-Hoo-boy, ever since the release of Theora Alpha One, we've gotten a lot of
-really great response, and we've got some more Frequently Asked Questions.
-For right now, we're going to leave the most time-relevant questions up
-here at the top of the FAQ page, and we'll sort them into the main
-document as needed at a later time. Let's get started!
-<p>
-<b>Q: What is an Alpha Release?</b>
-<p>
-A: Typically when software is created at a software company, it goes
-through a number of stages before it's released out to the world. You've
-probably heard of 'beta-testing' before. That's when people take code that
-has been deemed 'not quite ready' and are testing it out so that the
-authors can fix bugs where necessary.
-<p>
-'Alpha' code is strictly for internal development <i>only</i>, which is to
-say, 'No one sees this code, it's not even close to being done yet.' At
-the Xiph.org Foundation, we release everything we do so that people can
-help us move the codebase forward by reporting bugs and submitting
-patches. So, even 'Alpha' code needs to get out to the world.
-<p>
-<b>Q: Is Theora Final?</b>
-<p>
-A: Nope. When it is, we'll let you know.
-<p>
-<b>Q: Is there any way to use Theora on Microsoft Windows at this
-point?</b>
-<p>
-A: No. This is very early code, and we prefer Linux as our development
-platform. It would be unwise (and it would give the wrong impression) to
-package up the alpha code and port it to Windows, or anything other than
-our development platform. It's just too early.
-<p>
-<b>Q: Can I use Theora to encode stuff right now?</b>
-<p>
-A: Yes, but we strongly, <b>strongly</b> recommend against it, for
-<i>anything</i> but test-cases. This is not a full release in any sense of
-the word, it is simply a milestone, and if you start encoding things right
-away, there's a really good chance that it will break when you try to play
-it with tools we release when the final version is released.
-<p>
-And Now, On To The Rest:
-<p>
- <b>[ The Glorious Theora FAQ ]</b><br>
-<p>
-<p>
-<b>Q: What is Theora?</b>
-<p>
-A: Theora is Xiph.Org's first publicly released video codec, intended
-for use within the Ogg's project's Ogg multimedia streaming system.
-Theora is derived directly from On2's VP3 codec; Currently the two are
-nearly identical, varying only in framing headers, but Theora will
-diverge and improve from the main VP3 development lineage as time
-progresses.
-<p>
-<b>Q: Who's in charge of Theora
-development?</b> <p>
-A: The Xiph.org Foundation is the primary developer of Theora, but this
-is mainly an integration issue. The vp3 codec that serves as the base of
-Theora was written by a company called <a href="http://www.on2.com">On2
-Technologies</a>. Xiph.org
-will be
-responsible for all aspects of the development. On2 will provide
-both monetary and technical support to Xiph.org throughout the project. On2
-is also providing the source code of their implementation of the VP3 codec
-as well as some of their video tools.
-<p>
-<b>Q: Isn't vp3 a patented technology?</b>
-<p>
-A: Yes, some portions of the vp3 codec are covered by patents. However,
-the Xiph.org Foundation has negotiated an irrevocable free license to
-the vp3 codec for any purpose imaginable on behalf of the public. It is
-legal to use vp3 in any way you see fit (unless, of course, you're doing
-something illegal with it in your particular jurisdiction). You are free
-to download vp3, use it free of charge, implement it in a for-sale
-product, implement it in a free product, make changes to the
-source and distribute those changes, or print the source code out and
-wallpaper your spare room with it.
-<p>
-For more information, check the VP3 Legal Terms on the <a
-href="http://www.theora.org/svn.html">SVN</a> page.
-<p>
-<b>Q: What is the license for Theora?</b>
-<p>
-A: Theora (and all associated technologies released by the Xiph.org
-Foundation) is released to the public via a BSD-style license. It is
-completely free for commercial or noncommercial use. That means that
-commercial developers may independently write Theora software which is
-compatible with the specification for no charge and without restrictions of
-any kind.
-<p>
-<b>Q: What other video formats will Theora compete with?</b>
-<p>
-A: Given the quality and relatively low bitrate of Theora, it will be mostly
-competing with MPEG-4/DivX, Real, Windows Media, and other similar formats.
-<p>
-<b>Q: Is Theora identical to On2's VP3?</b>
-<p>
-A: Theora will be almost entirely based upon the VP3 codec designed by On2.
-However, Theora video data will be delivered inside of the Ogg container
-format (with Vorbis for audio), so Ogg Theora files will not be the same
-as VP3 files. There also may be quite a few performance advantages to
-using Theora when 1.0 is complete; While our focus is integration, there
-will certainly be a lot of optimization involved, as well.
-<p>
-<b>Q: What if Xiph.org and On2 decide to break off their agreement?</b>
-<p>
-A: Because Theora is an Open Source project, the source code will continue to
-be available and development will continue. Users will still be protected
-from the On2 patents.
-<p>
-<b>Q: What about Tarkin?</b>
-<p>
-A: Tarkin is essentially a proof-of-concept wavelet-based codec. Its
-experimental nature means it will not be ready for general use for some
-time. VP3 is a high-quality codec that can meet today's video needs now, so
-Xiph.org will be focusing its efforts on Theora for the near future.
-<p>
-<b>Q: When will Theora be done?</b>
-<p>
-A: We nominally expect to be finished by the end of 2003. VP3 is a very mature
-video codec, so most of our effort is going into the Theora project.
-<p>
-<b>Q: Why the name 'Theora?'</b>
-<p>
-A: Like other Xiph.org Foundation codec projects such as Vorbis or
-Tarkin, Theora is named after a fictional character. Theora Jones was the
-name of Edison Carter's 'controller' on the television series Max
-Headroom. She was played by Amanda Pays.
-<p>
-<b>Q: How can I help with development?</b>
-<p>
-A: Head on over to the <a href="http://www.theora.org/svn.html">SVN</a>
-page to grab the codebase, and hack away! Post your contributions
-online, and tell us about it on the <a
-href="http://www.theora.org/lists.html">theora-dev</a> mailing list.
-<p>
-<b>Q: Who designed this website?</b>
-<p>
-A: This website is based on a design called 'Nutrition,' available for
-public download from <a href="http://www.oswd.org">Open Source Web
-Design</a>. The original author is known by the nickname of 'BrAInDeD-'.
-<p>
-<b>Q: Who is the webmaster of this site?</b>
-<p>
-A: That would be <a href="mailto:manuel at xiph.org">Manuel Lora</a>, the
-greatest webmaster on the face of the planet.
-<p>
-<b>Q: Who maintains The Glorious Theora FAQ?</b>
-<p>
-A: No one person at the moment. Send changes to the list if it needs them.
-It was originally written by Emmett Plant and Dan Miller.
-This FAQ wouldn't be here at all without
-the work of Slammin' Stan Seibert, to whom we are eternally grateful.
-<p>
-<b>Q: Okay, what the heck is the Xiph.org Foundation?</b>
-<p>
-A: The Xiph.org Foundation is a Delaware non-profit company devoted to
-producing, maintaining and supporting an open multimedia platform. Check
-out the Foundation's website at <a
-href="http://www.xiph.org">http://www.xiph.org</a>. You'll be glad you
-did!
-<p>
-<b>Q: You guys are so great! How can I donate to these amazing
-projects?</b>
-<p>
-A: Wow, thanks! You can find more information on donating to the Xiph.org
-Foundation by
-following <a href="http://www.xiph.org/ogg/vorbis/donate.html">
-this link</a>! Thanks in advance!
-<p>
-<b>Q: What music was listened to when this FAQ was first being
-written, back on June 8th?</b>
-<p>
-A: What a strange question. Emmett was listening to No Doubt's 'Rock
-Steady' album and Pink's 'Missundazstood,' and Manuel was
-listening to 'Who's Next,' by The Who.
-<p>
-<b>Q: When was this FAQ last updated?</b>
-<p>
-A: May 7, 2003. From London of all places.
-<p>
-<br>
-<p>
-<br>
-<p>
- <!-- Close Content -->
- </td>
- </tr>
- </table>
- <table border="0" cellspacing="0" cellpadding="3">
- <tr>
- <td class="bl" bgcolor="#777777" nowrap>
- <!-- Copyright (HINT: This is for decoration. You may change it to what you like.) -->
- This is <a
-href="http://www.opencontent.org">OpenContent</a>. Go nuts.
- <!-- Close Copyright -->
- </td>
- </tr>
- </table>
- </td>
- <td width="79" align="right" valign="bottom">
- <table border="0" cellspacing="0" cellpadding="0">
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- <td> </td>
- <td align="right">
- <table border="0" cellspacing="0" cellpadding="0">
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- <td bgcolor="#9898BA" width="25" height="25" class="brsmt"> </td>
- </tr>
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- <td bgcolor="#9898BA" width="25" height="25" class="brsmt"> </td>
- </tr>
- </table>
- </td>
- <td width="50" height="50" bgcolor="#444466" class="brsmt">
- </td>
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </td>
- </tr>
- </table>
- </td>
- </tr>
-</table>
-</body>
-</html>
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