Ogg Skeleton 3 - Revision history

Martin.leese: moved Ogg Skeleton to Ogg Skeleton 3: Generic name Ogg Skeleton should be redirect to latest version Ogg Skeleton 4

2010-11-23T20:24:02Z

moved Ogg Skeleton to Ogg Skeleton 3: Generic name Ogg Skeleton should be redirect to latest version Ogg Skeleton 4

← Older revision

Revision as of 20:24, 23 November 2010

Cpearce at 00:01, 22 November 2010

2010-11-22T00:01:23Z

← Older revision		Revision as of 00:01, 22 November 2010
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-	'''Ogg Skeleton''' provides structuring information for multitrack [[Ogg]] files. It is compatible with Ogg [[Theora]] and provides extra clues for synchronization and content negotiation such as language selection.	+	'''Ogg Skeleton 3.0''' provides structuring information for multitrack [[Ogg]] files. It is compatible with Ogg [[Theora]] and provides extra clues for synchronization and content negotiation such as language selection.
		+
		+	'''NOTE:''' ''The Ogg Skeleton format has been updated to [[Ogg Skeleton 4]], which includes a keyframe index to enable faster seeking. Encoding tools are recommended to use [[Ogg Skeleton 4]] in preference to version 3.0 where possible.''

	Ogg is a generic container format for time-continuous data streams, enabling interleaving of several tracks of frame-wise encoded content in a time-multiplexed manner. As an example, an Ogg physical bitstream could encapsulate several tracks of video encoded in Theora and multiple tracks of audio encoded in Speex or Vorbis or FLAC at the same time. A player that decodes such a bitstream could then, for example, play one video channel as the main video playback, alpha-blend another one on top of it (e.g. a caption track), play a main Vorbis audio together with several FLAC audio tracks simultaneously (e.g. as sound effects), and provide a choice of Speex channels (e.g. providing commentary in different languages). Such a file is generally possible to create with Ogg, it is however not possible to generically parse such a file, seek on it, understand what codecs are contained in such a file, and dynamically handle and play back such content.		Ogg is a generic container format for time-continuous data streams, enabling interleaving of several tracks of frame-wise encoded content in a time-multiplexed manner. As an example, an Ogg physical bitstream could encapsulate several tracks of video encoded in Theora and multiple tracks of audio encoded in Speex or Vorbis or FLAC at the same time. A player that decodes such a bitstream could then, for example, play one video channel as the main video playback, alpha-blend another one on top of it (e.g. a caption track), play a main Vorbis audio together with several FLAC audio tracks simultaneously (e.g. as sound effects), and provide a choice of Speex channels (e.g. providing commentary in different languages). Such a file is generally possible to create with Ogg, it is however not possible to generically parse such a file, seek on it, understand what codecs are contained in such a file, and dynamically handle and play back such content.

Ogg.k.ogg.k: Undo revision 12334 by Drivelol (Talk)

2010-09-21T22:12:29Z

Undo revision 12334 by Drivelol (Talk)

← Older revision		Revision as of 22:12, 21 September 2010
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	* the Annodex technology: [http://www.annodex.net/ annodex.net]		* the Annodex technology: [http://www.annodex.net/ annodex.net]
	* [http://www.kfish.org/software/hogg/ HOgg] (Haskell)		* [http://www.kfish.org/software/hogg/ HOgg] (Haskell)
-	* [http://www.freelancercareers.com/ freelance writing](C++)
	* ffmpeg2theora (with --skeleton)		* ffmpeg2theora (with --skeleton)
	* speexenc (with --skeleton) & speexdec		* speexenc (with --skeleton) & speexdec

Drivelol: /* Development */

2010-09-21T20:19:25Z

Development

← Older revision		Revision as of 20:19, 21 September 2010
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	* the Annodex technology: [http://www.annodex.net/ annodex.net]		* the Annodex technology: [http://www.annodex.net/ annodex.net]
	* [http://www.kfish.org/software/hogg/ HOgg] (Haskell)		* [http://www.kfish.org/software/hogg/ HOgg] (Haskell)
		+	* [http://www.freelancercareers.com/ freelance writing](C++)
	* ffmpeg2theora (with --skeleton)		* ffmpeg2theora (with --skeleton)
	* speexenc (with --skeleton) & speexdec		* speexenc (with --skeleton) & speexdec

J^: /* Development */

2009-06-09T18:04:36Z

Development

← Older revision		Revision as of 18:04, 9 June 2009
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	* liboggz: [http://svn.annodex.net/liboggz/ liboggz svn] or [http://annodex.net/software/liboggz/ liboggz]		* liboggz: [http://svn.annodex.net/liboggz/ liboggz svn] or [http://annodex.net/software/liboggz/ liboggz]
	* the Annodex technology: [http://www.annodex.net/ annodex.net]		* the Annodex technology: [http://www.annodex.net/ annodex.net]
-	* [http://www.~~annodex~~.~~net/~conrad~~/software/hogg HOgg] (Haskell)	+	* [http://www.kfish.org/software/hogg/ HOgg] (Haskell)
	* ffmpeg2theora (with --skeleton)		* ffmpeg2theora (with --skeleton)
	* speexenc (with --skeleton) & speexdec		* speexenc (with --skeleton) & speexdec

Conrad: /* How to describe the logical bitstreams within an Ogg container? */ Correct description of granulerate use, and link to GranulePosAndSeeking

2008-12-04T21:42:56Z

How to describe the logical bitstreams within an Ogg container?: Correct description of granulerate use, and link to GranulePosAndSeeking

← Older revision		Revision as of 21:42, 4 December 2008
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	* other generic name-value fields that can provide meta information such as the language of a track or the video height and width		* other generic name-value fields that can provide meta information such as the language of a track or the video height and width
	* the number of header packets: this informs a parser about the number of actual header packets in an Ogg logical bitstream		* the number of header packets: this informs a parser about the number of actual header packets in an Ogg logical bitstream
-	* the granule rate: the granule rate represents the data rate in Hz at which content is sampled for the particular logical bitstream, ~~allowing~~ to ~~map~~ a granule ~~position~~ to time by calculating "~~granulepos~~ / granulerate"	+	* the granule rate: the granule rate represents the data rate in Hz at which content is sampled for the particular logical bitstream. Note that when using this to interpret timestamps, the granulepos of a data page must first be parsed to extract a granule value using the method described in [[GranulePosAndSeeking]]. This value can then be mapped to time by calculating "granules / granulerate".
	* the preroll: the number of past content packets to take into account when decoding the current Ogg page, which is necessary for seeking (vorbis has generally 2, speex 3)		* the preroll: the number of past content packets to take into account when decoding the current Ogg page, which is necessary for seeking (vorbis has generally 2, speex 3)
	* the granuleshift: the number of lower bits from the granulepos field that are used to provide position information for sub-seekable units (like the keyframe shift in theora)		* the granuleshift: the number of lower bits from the granulepos field that are used to provide position information for sub-seekable units (like the keyframe shift in theora)

Rillian: /* Specification */ Point clearly to the current specification

2008-11-26T02:13:31Z

Specification: Point clearly to the current specification

← Older revision		Revision as of 02:13, 26 November 2008
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	== Specification ==		== Specification ==
		+
		+	This is a motivation and design sketch.
		+	'''For the current specification see http://svn.annodex.net/standards/draft-pfeiffer-oggskeleton-current.txt'''

	=== How to describe the logical bitstreams within an Ogg container? ===		=== How to describe the logical bitstreams within an Ogg container? ===

Silvia: updated list of supported tools

2008-11-09T04:29:43Z

updated list of supported tools

← Older revision		Revision as of 04:29, 9 November 2008
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	* the Annodex technology: [http://www.annodex.net/ annodex.net]		* the Annodex technology: [http://www.annodex.net/ annodex.net]
	* [http://www.annodex.net/~conrad/software/hogg HOgg] (Haskell)		* [http://www.annodex.net/~conrad/software/hogg HOgg] (Haskell)
		+	* ffmpeg2theora (with --skeleton)
		+	* speexenc (with --skeleton) & speexdec
		+	* many more ...

	== External links ==		== External links ==

Silvia: added skeleton I-D

2008-08-05T04:21:36Z

added skeleton I-D

← Older revision		Revision as of 04:21, 5 August 2008
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	== External links ==		== External links ==

-	* Ogg Skeleton is described in more detail in the Annodex v3 ~~specification~~: [http://svn.annodex.net/standards/ I-D in svn] or [http://annodex.net/specifications.html I-D]	+	* Ogg Skeleton is described in more detail in the [http://svn.annodex.net/standards/draft-pfeiffer-oggskeleton-current.txt Skeleton I-D in svn]
		+	* Ogg Skeleton was originally specified in Annodex v3: [http://svn.annodex.net/standards/ I-D in svn] or [http://annodex.net/specifications.html I-D]


	[[Category:Ogg]]		[[Category:Ogg]]

Saoshyant: cat

2008-02-12T23:36:17Z

cat

← Older revision		Revision as of 23:36, 12 February 2008
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	* Ogg Skeleton is described in more detail in the Annodex v3 specification: [http://svn.annodex.net/standards/ I-D in svn] or [http://annodex.net/specifications.html I-D]		* Ogg Skeleton is described in more detail in the Annodex v3 specification: [http://svn.annodex.net/standards/ I-D in svn] or [http://annodex.net/specifications.html I-D]
		+
		+
		+	[[Category:Ogg]]