rfc9559v4.txt		rfc9559.txt
	Internet Engineering Task Force (IETF) S. Lhomme		Internet Engineering Task Force (IETF) S. Lhomme
	Request for Comments: 9559		Request for Comments: 9559
	Updates: 8794 M. Bunkus		Updates: 8794 M. Bunkus
	Category: Standards Track		Category: Standards Track
	ISSN: 2070-1721 D. Rice		ISSN: 2070-1721 D. Rice
	May 2024		June 2024
	Matroska Media Container Format Specification		Matroska Media Container Format Specification
	Abstract		Abstract
	This document defines the Matroska audiovisual data container		This document defines the Matroska audiovisual data container
	structure, including definitions of its structural elements,		structure, including definitions of its structural elements,
	terminology, vocabulary, and application.		terminology, vocabulary, and application.
	This document updates RFC 8794 to permit the use of a previously		This document updates RFC 8794 to permit the use of a previously
	skipping to change at line 6047 ¶		skipping to change at line 6047 ¶
	Element IDs are described in Section 5 of [RFC8794], with the changes		Element IDs are described in Section 5 of [RFC8794], with the changes
	in [Err7189] and [Err7191].		in [Err7189] and [Err7191].
	One-octet Matroska Element IDs (range 0x80-0xFE) are to be allocated		One-octet Matroska Element IDs (range 0x80-0xFE) are to be allocated
	according to the "RFC Required" policy [RFC8126].		according to the "RFC Required" policy [RFC8126].
	Two-octet Matroska Element IDs (range 0x407F-0x7FFE) are to be		Two-octet Matroska Element IDs (range 0x407F-0x7FFE) are to be
	allocated according to the "Specification Required" policy [RFC8126].		allocated according to the "Specification Required" policy [RFC8126].
			Two-octet Matroska Element IDs between 0x0100 and 0x407E are not
			valid for use as an Element ID.
	Three-octet (range 0x203FFF-0x3FFFFE) and four-octet Matroska Element		Three-octet (range 0x203FFF-0x3FFFFE) and four-octet Matroska Element
	IDs (range 0x101FFFFF-0x1FFFFFFE) are to be allocated according to		IDs (range 0x101FFFFF-0x1FFFFFFE) are to be allocated according to
	the "First Come First Served" policy [RFC8126].		the "First Come First Served" policy [RFC8126].
			Three-octet Matroska Element IDs between 0x010000 and 0x203FFE are
			not valid for use as an Element ID.
			Four-octet Matroska Element IDs between 0x01000000 and 0x101FFFFE are
			not valid for use as an Element ID.
	The allowed values in the "Matroska Element IDs" registry are similar		The allowed values in the "Matroska Element IDs" registry are similar
	to the ones found in the "EBML Element IDs" registry defined in		to the ones found in the "EBML Element IDs" registry defined in
	Section 17.1 of [RFC8794].		Section 17.1 of [RFC8794].
	EBML Element IDs defined for the EBML Header -- as defined in		EBML Element IDs defined for the EBML Header -- as defined in
	Section 17.1 of [RFC8794] -- MUST NOT be used as Matroska Element		Section 17.1 of [RFC8794] -- MUST NOT be used as Matroska Element
	IDs.		IDs.
	Given the scarcity of one-octet Element IDs, they should only be		Given the scarcity of one-octet Element IDs, they should only be
	created to save space for elements found many times in a file (for		created to save space for elements found many times in a file (for
	skipping to change at line 6295 ¶		skipping to change at line 6304 ¶
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0xFA | ReferencePriority | RFC 9559, |		| 0xFA | ReferencePriority | RFC 9559, |
	| | | Section 5.1.3.5.4 |		| | | Section 5.1.3.5.4 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0xFB | ReferenceBlock | RFC 9559, |		| 0xFB | ReferenceBlock | RFC 9559, |
	| | | Section 5.1.3.5.5 |		| | | Section 5.1.3.5.5 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0xFD | ReferenceVirtual | Reclaimed (RFC 9559, |		| 0xFD | ReferenceVirtual | Reclaimed (RFC 9559, |
	| | | Appendix A.4) |		| | | Appendix A.4) |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
			| 0xFF | Reserved | RFC 9559 |
			+------------+-----------------------------+----------------------+
	| 0x41A4 | BlockAddIDName | RFC 9559, |		| 0x41A4 | BlockAddIDName | RFC 9559, |
	| | | Section 5.1.4.1.17.2 |		| | | Section 5.1.4.1.17.2 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x41E4 | BlockAdditionMapping | RFC 9559, |		| 0x41E4 | BlockAdditionMapping | RFC 9559, |
	| | | Section 5.1.4.1.17 |		| | | Section 5.1.4.1.17 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x41E7 | BlockAddIDType | RFC 9559, |		| 0x41E7 | BlockAddIDType | RFC 9559, |
	| | | Section 5.1.4.1.17.3 |		| | | Section 5.1.4.1.17.3 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x41ED | BlockAddIDExtraData | RFC 9559, |		| 0x41ED | BlockAddIDExtraData | RFC 9559, |
	skipping to change at line 6751 ¶		skipping to change at line 6762 ¶
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x78B5 | OutputSamplingFrequency | RFC 9559, |		| 0x78B5 | OutputSamplingFrequency | RFC 9559, |
	| | | Section 5.1.4.1.29.2 |		| | | Section 5.1.4.1.29.2 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x7BA9 | Title | RFC 9559, |		| 0x7BA9 | Title | RFC 9559, |
	| | | Section 5.1.2.12 |		| | | Section 5.1.2.12 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x7D7B | ChannelPositions | Reclaimed (RFC 9559, |		| 0x7D7B | ChannelPositions | Reclaimed (RFC 9559, |
	| | | Appendix A.27) |		| | | Appendix A.27) |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
			| 0x7FFF | Reserved | RFC 9559 |
			+------------+-----------------------------+----------------------+
	| 0x22B59C | Language | RFC 9559, |		| 0x22B59C | Language | RFC 9559, |
	| | | Section 5.1.4.1.19 |		| | | Section 5.1.4.1.19 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x22B59D | LanguageBCP47 | RFC 9559, |		| 0x22B59D | LanguageBCP47 | RFC 9559, |
	| | | Section 5.1.4.1.20 |		| | | Section 5.1.4.1.20 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x23314F | TrackTimestampScale | RFC 9559, |		| 0x23314F | TrackTimestampScale | RFC 9559, |
	| | | Section 5.1.4.1.15 |		| | | Section 5.1.4.1.15 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x234E7A | DefaultDecodedFieldDuration | RFC 9559, |		| 0x234E7A | DefaultDecodedFieldDuration | RFC 9559, |
	skipping to change at line 6802 ¶		skipping to change at line 6815 ¶
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x3CB923 | PrevUUID | RFC 9559, |		| 0x3CB923 | PrevUUID | RFC 9559, |
	| | | Section 5.1.2.3 |		| | | Section 5.1.2.3 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x3E83BB | NextFilename | RFC 9559, |		| 0x3E83BB | NextFilename | RFC 9559, |
	| | | Section 5.1.2.6 |		| | | Section 5.1.2.6 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x3EB923 | NextUUID | RFC 9559, |		| 0x3EB923 | NextUUID | RFC 9559, |
	| | | Section 5.1.2.5 |		| | | Section 5.1.2.5 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
			| 0x3FFFFF | Reserved | RFC 9559 |
			+------------+-----------------------------+----------------------+
	| 0x1043A770 | Chapters | RFC 9559, |		| 0x1043A770 | Chapters | RFC 9559, |
	| | | Section 5.1.7 |		| | | Section 5.1.7 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x114D9B74 | SeekHead | RFC 9559, |		| 0x114D9B74 | SeekHead | RFC 9559, |
	| | | Section 5.1.1 |		| | | Section 5.1.1 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x1254C367 | Tags | RFC 9559, |		| 0x1254C367 | Tags | RFC 9559, |
	| | | Section 5.1.8 |		| | | Section 5.1.8 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x1549A966 | Info | RFC 9559, |		| 0x1549A966 | Info | RFC 9559, |
	skipping to change at line 6829 ¶		skipping to change at line 6844 ¶
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x1941A469 | Attachments | RFC 9559, |		| 0x1941A469 | Attachments | RFC 9559, |
	| | | Section 5.1.6 |		| | | Section 5.1.6 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x1C53BB6B | Cues | RFC 9559, |		| 0x1C53BB6B | Cues | RFC 9559, |
	| | | Section 5.1.5 |		| | | Section 5.1.5 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
	| 0x1F43B675 | Cluster | RFC 9559, |		| 0x1F43B675 | Cluster | RFC 9559, |
	| | | Section 5.1.3 |		| | | Section 5.1.3 |
	+------------+-----------------------------+----------------------+		+------------+-----------------------------+----------------------+
			| 0x1FFFFFFF | Reserved | RFC 9559 |
			+------------+-----------------------------+----------------------+
	Table 54: Initial Contents of "Matroska Element IDs" Registry		Table 54: Initial Contents of "Matroska Element IDs" Registry
	27.2. Chapter Codec IDs Registry		27.2. Chapter Codec IDs Registry
	IANA has created a new registry called the "Matroska Chapter Codec		IANA has created a new registry called the "Matroska Chapter Codec
	IDs" registry. The values correspond to the unsigned integer		IDs" registry. The values correspond to the unsigned integer
	ChapProcessCodecID value described in Section 5.1.7.1.4.15.		ChapProcessCodecID value described in Section 5.1.7.1.4.15.
	To register a new Chapter Codec ID in this registry, one needs a		To register a new Chapter Codec ID in this registry, one needs a
End of changes. 7 change blocks.
	1 lines changed or deleted		18 lines changed or added
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