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-Network Working Group L. Walleij
-Request for Comments: 3534 The Ogg Vorbis Community
-Category: Standards Track May 2003
-
-
- The application/ogg Media Type
-
-Status of this Memo
-
- This document specifies an Internet standards track protocol for the
- Internet community, and requests discussion and suggestions for
- improvements. Please refer to the current edition of the "Internet
- Official Protocol Standards" (STD 1) for the standardization state
- and status of this protocol. Distribution of this memo is unlimited.
-
-Copyright Notice
-
- Copyright (C) The Internet Society (2003). All Rights Reserved.
-
-Abstract
-
- The Ogg Bitstream Format aims at becoming a general, freely-available
- standard for transporting multimedia content across computing
- platforms and networks. The intention of this document is to define
- the MIME media type application/ogg to refer to this kind of content
- when transported across the Internet. It is the intention of the Ogg
- Bitstream Format developers that it be usable without intellectual
- property concerns.
-
-Conventions used in this Document
-
- The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
- "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
- document are to be interpreted as described in RFC 2119 [2].
-
-1. The Ogg Bitstream Format
-
- The Ogg Bitstream format has been developed as a part of a larger
- project aimed at creating a set of components for the coding and
- decoding of multimedia content (codecs) which are to be freely
- available and freely re-implementable both in software and in
- hardware for the computing community at large, including the Internet
- community.
-
- Raw packets from these codecs may be used directly by transport
- mechanisms that provide their own framing and packet-separation
- mechanisms (such as UDP datagrams).
-
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-
-
-Walleij Standards Track [Page 1]
-
-RFC 3534 The application/ogg Media Type May 2003
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- One such framing and content-separation mechanism is the real-time
- transport protocol (RTP). RTP allows the streaming of synchronous
- lossy data for broadcasting and similar purposes. If this function
- is desired then a separate RTP wrapping mechanism should be used. A
- wrapping mechanism is currently under development.
-
- For stream based storage (such as files) and transport (such as TCP
- streams or pipes), Ogg codecs use the Ogg Bitstream Format to provide
- framing/sync, sync recapture after error, landmarks during seeking,
- and enough information to properly separate data back into packets at
- the original packet boundaries without relying on decoding to find
- packet boundaries. The application/ogg MIME type refers to this kind
- of bitstreams, when no further knowledge of the bitstream content
- exists.
-
- The bitstream format in itself is documented in [1].
-
-2. Registration Information
-
- To: ietf-types@iana.org
-
- Subject: Registration of MIME media type application/ogg
-
- MIME media type name: application
-
- MIME subtype name: ogg
-
- Required parameters: none
-
- Optional parameters: none
-
- Encoding Considerations:
-
- The Ogg bitstream format is binary data, and must be encoded for
- non-binary transport; the Base64 encoding is suitable for Email.
- Binary encoding could also be used.
-
- Security Considerations:
-
- As the Ogg bitstream file is a container format and only a carrier of
- content (such as Vorbis audio) with a very rigid definition (see
- [1]), this format in itself is not more vulnerable than any other
- content framing mechanism. The main security consideration for the
- receiving application is to ensure that manipulated packages can not
- cause buffer overflows and the like. It is possible to encapsulate
- even executable content in the bitstream, so for such uses additional
- security considerations must be taken.
-
-
-
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-Walleij Standards Track [Page 2]
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-RFC 3534 The application/ogg Media Type May 2003
-
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- Ogg bitstream files are not signed or encrypted using any applicable
- encryption schemes. External security mechanisms must be added if
- content confidentiality and authenticity is to be achieved.
-
- Interoperability considerations:
-
- The Ogg bitstream format has proved to be widely implementable across
- different computing platforms. A broadly portable reference
- implementation is available under a BSD license.
-
- The Ogg bitstream format is not patented and can be implemented by
- third parties without patent considerations.
-
- Published specification:
-
- See [1].
-
- Applications which use this media type:
-
- Any application that implements the specification will be able to
- encode or decode Ogg bitstream files. Specifically, the format is
- supposed to be used by subcodecs that implement, for example, Vorbis
- audio.
-
- Additional information:
-
- Magic number(s):
-
- In Ogg bitstream files, the first four bytes are 0x4f 0x67 0x67 0x53
- corresponding to the string "OggS".
-
- File extension: .ogg
-
- Macintosh File Type Code(s): OggS
-
- Object Identifier(s) or OID(s): none
-
- Person & email address to contact for further information:
-
- Questions about this proposal should be directed to Linus Walleij
- <triad@df.lth.se>. Technical questions about the Ogg bitstream
- standard may be asked on the mailing lists for the developer
- community. <http://www.xiph.org/archives/>
-
- Intended usage: COMMON
-
-
-
-
-
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-Walleij Standards Track [Page 3]
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-RFC 3534 The application/ogg Media Type May 2003
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-
- Author/Change controller:
-
- This document was written by Linus Walleij <triad@df.lth.se>.
- Changes to this document will either be handled by him, a
- representative of the Xiph.org, or the associated development
- communities.
-
- The Ogg bitstream format is controlled by the Xiph.org and the
- respective development communities.
-
-3. Security Considerations
-
- Security considerations are discussed in the security considerations
- clause of the MIME registration in section 2.
-
-4. Normative References
-
- [1] Pfeiffer, S., "The Ogg encapsulation format version 0", RFC
- 3533, May 2003.
-
- [2] Bradner, S., "Key words for use in RFCs to Indicate Requirement
- Levels", BCP 14, RFC 2119, March 1997.
-
-5. Intellectual Property Statement
-
- The IETF takes no position regarding the validity or scope of any
- intellectual property or other rights that might be claimed to
- pertain to the implementation or use of the technology described in
- this document or the extent to which any license under such rights
- might or might not be available; neither does it represent that it
- has made any effort to identify any such rights. Information on the
- IETF's procedures with respect to rights in standards-track and
- standards-related documentation can be found in BCP-11. Copies of
- claims of rights made available for publication and any assurances of
- licenses to be made available, or the result of an attempt made to
- obtain a general license or permission for the use of such
- proprietary rights by implementors or users of this specification can
- be obtained from the IETF Secretariat.
-
- The IETF invites any interested party to bring to its attention any
- copyrights, patents or patent applications, or other proprietary
- rights which may cover technology that may be required to practice
- this standard. Please address the information to the IETF Executive
- Director.
-
-
-
-
-
-
-
-Walleij Standards Track [Page 4]
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-RFC 3534 The application/ogg Media Type May 2003
-
-
-6. Author's Address
-
- Linus Walleij
- The Ogg Vorbis Community
- Master Olofs Vag 24
- Lund 224 66
- SE
-
- Phone: +46 703 193678
- EMail: triad@df.lth.se
- URI: http://www.xiph.org/
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-Walleij Standards Track [Page 5]
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-RFC 3534 The application/ogg Media Type May 2003
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-7. Full Copyright Statement
-
- Copyright (C) The Internet Society (2003). All Rights Reserved.
-
- This document and translations of it may be copied and furnished to
- others, and derivative works that comment on or otherwise explain it
- or assist in its implementation may be prepared, copied, published
- and distributed, in whole or in part, without restriction of any
- kind, provided that the above copyright notice and this paragraph are
- included on all such copies and derivative works. However, this
- document itself may not be modified in any way, such as by removing
- the copyright notice or references to the Internet Society or other
- Internet organizations, except as needed for the purpose of
- developing Internet standards in which case the procedures for
- copyrights defined in the Internet Standards process must be
- followed, or as required to translate it into languages other than
- English.
-
- The limited permissions granted above are perpetual and will not be
- revoked by the Internet Society or its successors or assigns.
-
- This document and the information contained herein is provided on an
- "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
- TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
- BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
- HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
- MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
-
-Acknowledgement
-
- Funding for the RFC Editor function is currently provided by the
- Internet Society.
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-Walleij Standards Track [Page 6]
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