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Topic: Open source codecs and containers

	codecs [Video Wiki] (Site not responding. Last check: 2007-10-20)
		The best know non-proprietary open source container format is probably.OGG which would normally be used for theora video and vorbis audio althought it can contain any codec.
		While DivX is closed source and is designed to run on the Windows operating system, XviD is open source and runs on multiple platforms, including Windows, Mac OS and GNU/Linux.
		Open and free, Theora is a codec being developed by the Xiph.org Foundation as part of their Ogg project.
	video.indymedia.org /wiki/doku.php?id=codecs (1292 words)

	Editorial:Codecs - Anime-Wiki.org
		In the MS Windows sense, a codec is just a simple library that plugs into the operating system so that DirectShow and other simple WAPI-based media players have a way to decode and play back a number of varied formats for audio and video without the expentidure of writing decoders for these formats from scratch.
		A Free, open source audio codec developed by the Xiph.org foundation, Vorbis has come out to the top to be one of the top codecs for low-bitrate applications (for 64Kib/sec and up) in quality, and, in many cases, speed.
		Codecs that are today free could suddenly disappear or become too expensive for anyone not in a major video processing company to afford - barring entry to the market to startup companies and keeping the common man from making and releasing his own video.
	www.anime-wiki.org /index.php/Editorial:Codecs (4939 words)

	Codec - Wikipedia, the free encyclopedia
		Codecs (in the modern, software sense) encode a stream or signal for transmission, storage or encryption and decode it for viewing or editing.
		Codecs are often used in videoconferencing and streaming media applications.
		There are lossless codecs as well, but for most purposes the almost imperceptible increase in quality is not worth the considerable increase in data size.
	en.wikipedia.org /wiki/Codecs (594 words)

	Democratizing the Archive: An Open Interface for Mediation - MetavidWiki
		Open Secrets republishes their analysis for a small fee[33], this publication does not impede the availability of the source data[34].
		The strict adherence to free and open source software may be a limiting factor for other projects which are not operating under the praxis of open source but seek to emulate portions of the metavid project.
		The selection of theora is not designed to enforce open source purism on users of the archive; this would limit the accessibility and be contrary to the goals of the praxis we have adopted rather we aim to make the archive accessible as possible while not sacrificing transparency and accessibility to the archives construction.
	metavid.ucsc.edu /wiki/index.php/Democratizing_the_Archive:_An_Open_Interface_for_Mediation (9905 words)

	DivX (Linux Reviews)
		It is one of several codecs commonly associated with ripping, where audio and video multimedia are transferred to a hard disk and transcoded.
		The Microsoft codec, which originally required that the compressed output be put in an ASF file, was altered to allow other containers such as AVI.
		An open source version of the codecâ”called OpenDivXÂ®â”was released by DivX in early 2001, and this version served as the basis for the open source Xvid codec, the source code of which is largely maintained by Xvid Solutions.
	linuxreviews.org /dictionary/DivX (2272 words)

	Active Streaming Format with Microsoft NetShow -- MIND September 1997
		A number of codecs come preinstalled with Windows and any user who downloads and installs the NetShow Player helper application is given several more during installation, but you can't assume every user will have the codec they need to decode your ASF content.
		The codec installation control's constructor determines whether the platform is Windows 95 or Windows NT and uses an appropriate mechanism to check for the presence of the Cinepak codec.
		Under the Codecs tab you will see a list of the codecs used by the objects within the ASF data and whether the codecs are installed on your computer.
	www.microsoft.com /mind/0997/netshow/netshow.asp (6928 words)

	Xbox Media Center (Site not responding. Last check: 2007-10-20)
		The first is a ported version of the open source cross-platform player, MPlayer, which is known for playing proprietary media-formats without having to pay license fees.
		XBMC handles all codecs and containers normally supported by MPlayer (all FFmpeg supported codecs and also several external ones with the help of proprietary DLL-files: RealMedia, QuickTime, WMV9/WMA9, VP4/5/6), and the sources are synced at regular intervals.
		This core support all the FFmpeg codecs, and in addition the MPEG-2 video codec, and the audio codecs DTS and AC3 (based on the open source libraries, libmpeg2, libdca, and liba52 respectively).
	www.tocatch.info /en/XBMC.htm (1655 words)

	p2pnet.net \| news \| The Good, the Bad and the Ugly (Site not responding. Last check: 2007-10-20)
		Though the standard is open, the format is patented and there's a royalty for commercial use.
		With open standards, media files can be viewed on windows, linux and the other unix varients, macos, someone will probably port a player to run on mobiles.
		Open media formats such as Vorbis audio compression, xvid video and the OGG and OGM containers have the potential to ensure anyone can safely make and distribute multimedia content without worrying about licensing issues.
	www.p2pnet.net /article/7885 (883 words)

	Free-Codecs.com :: Guides : What you need to know about codecs
		A container format is a computer file format that can contain various types of data, compressed in a manner of standardized codecs.
		The container file is used to be able to identify and interleave (set a value on how often the audio and video streams are "synchronized") the different data types.
		Codecs may also be able to transcode from one digital format to another; for example, from PCM audio to MP3 audio.
	www.free-codecs.com /guides/What_you_need_to_know_about_codecs.htm (519 words)

	NewsForge: The Online Newspaper for Linux and Open Source
		Any open source software project that assists educational or not-for-profit ventures is eligible to be nominated, and self-nominations are allowed.
		One of the best ways you can participate in the free and open source software (FOSS) revolution is by helping to test software and reporting bugs and issues to project developers to help them improve their code.
		When you start learning the source code of an unfamiliar project, you don't have the knowledge of its structure or the meaning of specific functions, classes, and units in the project.
	www.newsforge.com (2266 words)

	Open source codecs and containers - Wikipedia, the free encyclopedia
		This is a listing of open-source multimedia codecs and container formats.
		That doesn't necessarily mean that further restrictions (such as software patents) don't exist for these codecs and formats, which is the case for many of them, like MP3.
		Note that codec is software, not a format — for example, video produced with the XviD and FFmpeg MPEG-4 codecs is MPEG-4 ASP video.
	en.wikipedia.org /wiki/Open_source_codecs_and_containers (219 words)

	Kingsley Idehen's Blog Data Space
		The representation may be limited to the description of some or all of the elements contained within the source or may include information regarding the narrative relationship that these elements have both to the media and to each other.
		And the next open source movements—which will be as much about open standards as about code—will be a lot harder for the incumbents to exploit.
		XSPF is an open standard for playlists, and MusicBrainz is an alternative to the proprietary (and originally effectively stolen) database that Gracenote licenses.
	www.openlinksw.com /blog/~kidehen/index.vspx?page=&cat=91 (8021 words)

	Savannah Administration - Tasks: task #3957, Submission of Perplex Library [Savannah]
		'Open' should be a red-flag word as the file formats are just open frameworks in which to transport chunks of data encoded with proprietary algorithms.
		We will be reviewing the cvs code in a month to check if the source files contain appropriate copyright notice and permission-to-copy statements at the beginning of every file of source code.
		The goal for the project's first version is to provide a workable demuxing API that can be adapted to many existing open source multimedia projects.
	savannah.gnu.org /task/?3957 (846 words)

	Technologies For Building Open-Source Massively Multiplayer Games
		Open Source and Free Software have so far failed to make inroads into the games industry, where intellectual property is still seen as essential for successful business.
		In a co-operative open source or free software project, it is often difficult to match the resources of a well funded proprietary project, so an approach to development must be taken that ensures that most effective use can be made of the resources available, and work is reused wherever possible.
		Other codecs are preferred for efficient network transport, but Bach can be used when snooping the network traffic for debugging purposes is desirable.
	www.worldforge.org /project/articles/tech4osmmg (3700 words)

	Computer Vision Source Code
		Open Source, FREE for academic AND commercial use.
		Source code for the AcquireNowClient application is included, and can be used by customers as a base for their own imaging applications.
		Modular Flow Scheduling Middleware is an open source implementation of a generic, modular, extensible software architecture for dataflow processing of datastreams.
	www-2.cs.cmu.edu /afs/cs/project/cil/ftp/html/txtv-source.html (9824 words)

	[No title]
		I realize that Real's codecs themselves aren't and never will be open source, but since since those (and others) containers are specifically designed to be able to contain any type of video & audio, then why not allow Real, as well.
		Only that it opens up possibilities, which was the exact same reason the source itself was opened up.
		The architecture on which matroska is based on is a kind of binary version of XML and very flexible, to be able to extend the format for the future, but this is mainly necessary because of the very strict rules to put any kind of content into matroska files.
	lists.helixcommunity.org /pipermail/open-licensing/2003-June.txt (4814 words)

	Van Hoek Software REALbasic Plugins
		Because it is the screen a transfer codec is in principle not required.
		A codec emulator is provided, which does not do much interesting other then providing a funny transfer of the image(s) when the pixel depth is other than 32.
		Those datafields mostly contain MacOS "toolbox" types we cannot easily provide in the RB environment that then are used in other methods.
	homepage.mac.com /vanhoek (5562 words)

	13 - Multimedia
		The reason for this is that my audio device has an AC'97 codec, which uses only 5 bits for volume control, leading to only 32 possible values.
		Some of the lossless audio formats may be played without the need for third party software, provided they contain the uncompressed digital samples in chunks of bytes.
		A good example is the free, open and unpatented Ogg Vorbis format.
	www.openbsd.org /faq/faq13.html (6245 words)

	Open source video codecs - Doom9's Forum
		Nicolas (the author of Rududu) said if he ever decided to stop working on the codec he would open the sources to the community so they could continue with it.
		About h.264, I believe the FFMPEG team have pretty much stopped development on their MPEG-4 ASP codec and are working on a h.264 encoder, but this is only what I've heard, so don't hold me to it.
		FFVFW is not just another mpeg4 codec, it contains a bunch of different codecs, including the most powerful lossless codec (FFV1) i've heard about (usually nearly 2 times better than huffyuv).
	forum.doom9.org /showthread.php?p=376298 (1102 words)

	FileForum \| Koepi's XviD Codec
		In response to the previous poster; from my understanding, when you play the same file using the xvid codec or using ffdshow there won't be much quality difference, because the quality is mainly determined by the way it was encoded, rather than the way you play it.
		The main difference is that using the divx codec, or especially the xvid codec, to play a file, takes a lot of CPU time, whereas using ffdshow (which can decode anything that divx or xvid, or a host of other codecs created) to play the file seems to use a lot less processing power.
		Additionally xvid is also open source and not bundled with a player or ads anything else.
	fileforum.betanews.com /detail.php3?fid=1043648426 (562 words)

	Unreal Media Server sample source code
		Developers are encouraged to write their own containers for their specific applications.
		Codecs quality differs for one-pass real-time live encoding and multiple passes files encoding.
		Codecs can be of two types: VBR (variable bitrate) and CBR (constant bitrate).
	www.umediaserver.net /source.html (3197 words)

	Playing Those Damn Videos on a Mac - OS X
		In this container all sorts of video and audio streams can be stored, most of which (like Sorenson etc.) were licensed by apple in order to try and gain a certain level of exclusivity for their container format, urging people to use Macs for video editing and to use Quicktime for playback.
		While Apple and Microsoft refuse to support competing codecs out of the box the open source community are trying to do just that thanks to the FFMpeg project and the various players which use this as the foundation for a multi-format, multi-codec player.
		These two players are both based on the open source FFmpeg project which means that their codec capabilities are essentially identical so exactly which player you choose can often be a matter of preference rather than their ability to play the files.
	www.animemusicvideos.org /guides/playback/playosx.html (2045 words)

	HOWTO Mencoder Introduction Guide - Gentoo Linux Wiki (Site not responding. Last check: 2007-10-20)
		The list of codecs to encode media is too long, but some open source ones are not included (FLAC and Theora, for example).
		Matroska is an open-source video container, similar to AVI, except that it has many more advanced options and settings that can be included in the metadata.
		Most codecs were developed from scratch to ensure best performances and high code reusability." Using lavc as your video codec gives you lots of options, including lots of formats you can encode to.
	gentoo-wiki.com /HOWTO_Mencoder_Introduction_Guide (3092 words)

	DataCompression.info - Source Code (Site not responding. Last check: 2007-10-20)
		The source code is free for academic, research and educational use as depicted in the Abel Public License (APL).
		The Open Compression Toolkit is a set of modular C++ classes and utilities for implementing and testing compression algorithms.
		This is an open source PDF renderer, which includes code that decompresses LZW data embedded in the PDF file.
	datacompression.info /SourceCode.shtml (8538 words)

	Hydrogenaudio Forums > Cog 0.01: A new open source audio player for OS X
		A free open source audio player for OS X has been released which...
		Allow for container and codec to be handled separately, else you will never be able to support modern containers like MP4 or matroska with all possible audio codecs in them.
		Being an open source project, I prefer that Cog uses open source libraries for the decoding.
	www.hydrogenaudio.org /forums/lofiversion/index.php/t34592.html (2336 words)

	Download FFDSHOW rev. 1046 (200700317) (open source) (Site not responding. Last check: 2007-10-20)
		Codec also features postprocessing capabilities, support for virtually all MPEG-4 video formats, support for various processor enhancements (such as SSE and MMX), etc. FFDSHOW is released as an open source software under GPL license agreement.
		This is an amazing little codec, would give it 10 stars if I could, can handle almost anything, and runs very smoothly in the backround.
		Powa, OGM and MKV are filters/containers, they are not codecs.
	www.filepedia.com /video_software/codecs_and_filters/ffdshow.cfm?view=all (2396 words)

	[Flac-users] Matroska open source A/V container format officially released
		Hi, i have the big pleasure to officially announce that the matroska multimedia container project has finally left alpha status and turned into public beta status last night.
		After almost 18 months of development, always in contact with developers from various other opensource projects in the multimedia environment, we were able to come up with a working specification for the container end of 2002.
		The matroska container is mainly aiming to replace the good old AVI, but it is also ment to be a powerful and open alternative to other, mainly proprietary, containers such as ASF, MP4, MOV, RM, MPX annd even MPEG.
	lists.xiph.org /pipermail/flac/2003-April/000175.html (682 words)

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