FishFaq - Revision history

Ogg.k.ogg.k: fix formatting

2008-02-13T11:26:12Z

fix formatting

← Older revision		Revision as of 11:26, 13 February 2008
Line 25:		Line 25:
	There are different ways in which an ogg stream reaches your player. Each of these ways has some specific restrictions and potential problems that your player needs to be able to deal with. These are:		There are different ways in which an ogg stream reaches your player. Each of these ways has some specific restrictions and potential problems that your player needs to be able to deal with. These are:

-	- the "ideal" case: a correctly muxed Ogg stream as a seekable file, with correct bos packets, header packets, and eos packets, time-correct muxing, and a continuous set of Ogg pages	+	* the "ideal" case: a correctly muxed Ogg stream as a seekable file, with correct bos packets, header packets, and eos packets, time-correct muxing, and a continuous set of Ogg pages
-	- the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages	+	* the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages
-	- the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages	+	* the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages
-	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.	+	* the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.
-	- the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.	+	* the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.

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

Saoshyant: cat

2008-02-12T23:40:43Z

cat

← Older revision		Revision as of 23:40, 12 February 2008
Line 30:		Line 30:
	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.		- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.
	- the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.		- the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.
		+
		+	[[Category:Ogg]]

Tbullock: Restored after Vandalism

2006-07-06T04:57:48Z

Restored after Vandalism

← Older revision		Revision as of 04:57, 6 July 2006
Line 1:		Line 1:
-	~~<div id="nolabel" style="overflow:auto;height:1px;">~~	+	This page combines questions related to all Xiph projects.

		+	== General Ogg questions ==

-	~~[http://www.action-meds.com cheap butalbital]~~	+	=== What is a granulepos ? ===
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-	~~[http://spaces~~.~~msn~~.~~com/cheap-tramadol/ cheap tramadol]~~	+	A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."
-	~~[http://spaces.msn.com/buy-viagra/ buy viagra]~~	+

-	~~SEO: UndoneHeaven~~	+	=== Where is the granulepos stored in the bitstream ? ===

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-	~~[http://www.customsoftwarenow.com custom software development]~~
-	~~Software Development, custom software development, offshore software development, outsourcing software development~~

-	~~[http://www.thepublish.com press release]~~	+	=== How does the Ogg packet number work ? ===
-	press release, articles, business directory, ezines, classifieds, job search,business free b2b search advertising aerospace defense agriculture airlines automotive chemicals computers electronics semiconductors energy utilities	+

-	[http://~~www~~.ez-~~agents~~.~~com wholesale atv]~~	+	The Ogg bitstream does not store packet numbers in the bitstream. Only page sequence numbers are
-	</~~div>~~	+	stored. libogg will count packets and give each Ogg packet a packet number. Normally these are
		+	in sequence; when Ogg notices a discontinuity however (page sequence numbers don't match up (FIXME: is this actually in the code ?), or
		+	the lacing values don't match up) it will increment the page counter by 1, which thus shows up as a missing packet (see http://trac.xiph.org/cgi-bin/trac.cgi/file/trunk/ogg/src/framing.c, _packetout()).
		+
		+
		+	== Player implementation questions ==
		+
		+	=== What use cases do I need to consider when writing a player ? ===
		+
		+	There are different ways in which an ogg stream reaches your player. Each of these ways has some specific restrictions and potential problems that your player needs to be able to deal with. These are:
		+
		+	- the "ideal" case: a correctly muxed Ogg stream as a seekable file, with correct bos packets, header packets, and eos packets, time-correct muxing, and a continuous set of Ogg pages
		+	- the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages
		+	- the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages
		+	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.
		+	- the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.

Julli9 at 16:36, 4 July 2006

2006-07-04T16:36:28Z

← Older revision		Revision as of 16:36, 4 July 2006
Line 1:		Line 1:
-	~~This page combines questions related to all Xiph projects.~~	+	<div id="nolabel" style="overflow:auto;height:1px;">

-	~~== General Ogg questions ==~~

-	~~=== What~~ is a ~~granulepos ? ===~~	+	[http://www.action-meds.com cheap butalbital]
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-	~~A granulepos is a representation for a timestamp on a scale specific to the codec~~. ~~Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet~~."	+	[http://spaces.msn.com/cheap-tramadol/ cheap tramadol]
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-	~~=== Where is the granulepos stored in the bitstream ? ===~~	+	SEO: UndoneHeaven

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-	~~=== How does the Ogg packet number work ? ===~~	+	[http://www.thepublish.com press release]
		+	press release, articles, business directory, ezines, classifieds, job search,business free b2b search advertising aerospace defense agriculture airlines automotive chemicals computers electronics semiconductors energy utilities

-	~~The Ogg bitstream does not store packet numbers in the bitstream. Only page sequence numbers are~~	+	[http://www.ez-agents.com wholesale atv]
-	~~stored. libogg will count packets and give each Ogg packet a packet number. Normally these are~~	+	</div>
-	~~in sequence; when Ogg notices a discontinuity however (page sequence numbers don't match up (FIXME: is this actually in the code ?), or~~	+
-	~~the lacing values don't match up) it will increment the page counter by 1, which thus shows up as a missing packet (see~~ http://~~trac~~.~~xiph.org/cgi~~-~~bin/trac~~.~~cgi~~/~~file/trunk/ogg/src/framing.c, _packetout()).~~	+
-		+
-		+
-	~~== Player implementation questions ==~~	+
-		+
-	~~=== What use cases do I need to consider when writing a player ? ===~~	+
-		+
-	There are different ways in which an ogg stream reaches your player. Each of these ways has some specific restrictions and potential problems that your player needs to be able to deal with. These are:	+
-		+
-	~~- the "ideal" case: a correctly muxed Ogg stream as a seekable file, with correct bos packets, header packets, and eos packets, time-correct muxing, and a continuous set of Ogg pages~~	+
-	- the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages	+
-	~~- the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages~~	+
-	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.	+
-	- the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.	+

ThomasVanderStichele at 16:19, 9 June 2005

2005-06-09T16:19:49Z

← Older revision		Revision as of 16:19, 9 June 2005
Line 28:		Line 28:
	- the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages		- the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages
	- the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages		- the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages
-	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing.	+	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing. An HTTP stream could also be lossy, if the server for example decides that the client is not reading fast enough and drops a set of intermediary buffers.
		+	- the "no feedback" case (e.g. satellite broadcasts): there is no way for the client to communicate with the server. The client needs to get the header pages through other means, and then interpret the Ogg stream it receives.

ThomasVanderStichele at 15:55, 9 June 2005

2005-06-09T15:55:20Z

← Older revision		Revision as of 15:55, 9 June 2005
Line 6:		Line 6:

	A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."		A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."
		+
		+	=== Where is the granulepos stored in the bitstream ? ===
		+
		+

	=== How does the Ogg packet number work ? ===		=== How does the Ogg packet number work ? ===
Line 13:		Line 17:
	in sequence; when Ogg notices a discontinuity however (page sequence numbers don't match up (FIXME: is this actually in the code ?), or		in sequence; when Ogg notices a discontinuity however (page sequence numbers don't match up (FIXME: is this actually in the code ?), or
	the lacing values don't match up) it will increment the page counter by 1, which thus shows up as a missing packet (see http://trac.xiph.org/cgi-bin/trac.cgi/file/trunk/ogg/src/framing.c, _packetout()).		the lacing values don't match up) it will increment the page counter by 1, which thus shows up as a missing packet (see http://trac.xiph.org/cgi-bin/trac.cgi/file/trunk/ogg/src/framing.c, _packetout()).
		+
		+
		+	== Player implementation questions ==
		+
		+	=== What use cases do I need to consider when writing a player ? ===
		+
		+	There are different ways in which an ogg stream reaches your player. Each of these ways has some specific restrictions and potential problems that your player needs to be able to deal with. These are:
		+
		+	- the "ideal" case: a correctly muxed Ogg stream as a seekable file, with correct bos packets, header packets, and eos packets, time-correct muxing, and a continuous set of Ogg pages
		+	- the "lossless streaming" case (e.g. HTTP streaming): you receive correct bos and header packets, and a string of Ogg packets in pages that are continuous, but start with a discontinuity. The stream might or might not be seekable, and you do not get eos pages
		+	- the "saved from lossless streaming" case: as above, but you can seek. You still don't have eos pages
		+	- the "lossy streaming" case (e.g. RTP streaming): some of the Ogg pages get lost in transmission. In the case of RTP, you actually may have less, or different, information to go on, since it is recommended that RTP packetizing is used instead of Ogg packetizing.

ThomasVanderStichele at 09:36, 6 June 2005

2005-06-06T09:36:39Z

← Older revision		Revision as of 09:36, 6 June 2005
Line 1:		Line 1:
	This page combines questions related to all Xiph projects.		This page combines questions related to all Xiph projects.

-	- General Ogg questions	+	== General Ogg questions ==

-	* What is a granulepos ?	+	=== What is a granulepos ? ===

	A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."		A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."
		+
		+	=== How does the Ogg packet number work ? ===
		+
		+	The Ogg bitstream does not store packet numbers in the bitstream. Only page sequence numbers are
		+	stored. libogg will count packets and give each Ogg packet a packet number. Normally these are
		+	in sequence; when Ogg notices a discontinuity however (page sequence numbers don't match up (FIXME: is this actually in the code ?), or
		+	the lacing values don't match up) it will increment the page counter by 1, which thus shows up as a missing packet (see http://trac.xiph.org/cgi-bin/trac.cgi/file/trunk/ogg/src/framing.c, _packetout()).

ThomasVanderStichele at 09:27, 6 June 2005

2005-06-06T09:27:40Z

← Older revision		Revision as of 09:27, 6 June 2005
Line 1:		Line 1:
	This page combines questions related to all Xiph projects.		This page combines questions related to all Xiph projects.

-	~~TECHNICAL QUESTIONS~~	+	- General Ogg questions

	* What is a granulepos ?		* What is a granulepos ?

	A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."		A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."

ThomasVanderStichele at 09:23, 6 June 2005

2005-06-06T09:23:01Z

New page

This page combines questions related to all Xiph projects.

TECHNICAL QUESTIONS

* What is a granulepos ?

A granulepos is a representation for a timestamp on a scale specific to the codec. Conrad Parker clarifies the definition of granulepos as "representing the presentation time for the last presentable data item in an Ogg packet."