Ogg Media Types
RFC 5334

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• 07

Network Working Group                                       I. Goncalves
Request for Comments: 5334                                   S. Pfeiffer
Obsoletes: 3534                                            C. Montgomery
Category: Standards Track                                           Xiph
                                                          September 2008

                            Ogg Media Types

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.

Abstract

   This document describes the registration of media types for the Ogg
   container format and conformance requirements for implementations of
   these types.  This document obsoletes RFC 3534.

Table of Contents

   1.     Introduction  . . . . . . . . . . . . . . . . . . . . . . .  2
   2.     Changes Since RFC 3534  . . . . . . . . . . . . . . . . . .  2
   3.     Conformance and Document Conventions  . . . . . . . . . . .  3
   4.     Deployed Media Types and Compatibility  . . . . . . . . . .  3
   5.     Relation between the Media Types  . . . . . . . . . . . . .  5
   6.     Encoding Considerations . . . . . . . . . . . . . . . . . .  5
   7.     Security Considerations . . . . . . . . . . . . . . . . . .  6
   8.     Interoperability Considerations . . . . . . . . . . . . . .  7
   9.     IANA Considerations . . . . . . . . . . . . . . . . . . . .  7
   10.    Ogg Media Types . . . . . . . . . . . . . . . . . . . . . .  7
   10.1.  application/ogg . . . . . . . . . . . . . . . . . . . . . .  7
   10.2.  video/ogg . . . . . . . . . . . . . . . . . . . . . . . . .  8
   10.3.  audio/ogg . . . . . . . . . . . . . . . . . . . . . . . . .  9
   11.    Acknowledgements  . . . . . . . . . . . . . . . . . . . . . 10
   12.    Copying Conditions  . . . . . . . . . . . . . . . . . . . . 10
   13.    References  . . . . . . . . . . . . . . . . . . . . . . . . 11
   13.1.  Normative References  . . . . . . . . . . . . . . . . . . . 11
   13.2.  Informative References  . . . . . . . . . . . . . . . . . . 11

Goncalves, et al.           Standards Track                     [Page 1]
RFC 5334                    Ogg Media Types               September 2008

1.  Introduction

   This document describes media types for Ogg, a data encapsulation
   format defined by the Xiph.Org Foundation for public use.  Refer to
   "Introduction" in [RFC3533] and "Overview" in [Ogg] for background
   information on this container format.

   Binary data contained in Ogg, such as Vorbis and Theora, has
   historically been interchanged using the application/ogg media type
   as defined by [RFC3534].  This document obsoletes [RFC3534] and
   defines three media types for different types of content in Ogg to
   reflect this usage in the IANA media type registry, to foster
   interoperability by defining underspecified aspects, and to provide
   general security considerations.

   The Ogg container format is known to contain [Theora] or [Dirac]
   video, [Speex] (narrow-band and wide-band) speech, [Vorbis] or [FLAC]
   audio, and [CMML] timed text/metadata.  As Ogg encapsulates binary
   data, it is possible to include any other type of video, audio,
   image, text, or, generally speaking, any time-continuously sampled
   data.

   While raw packets from these data sources may be used directly by
   transport mechanisms that provide their own framing and packet-
   separation mechanisms (such as UDP datagrams or RTP), Ogg is a
   solution for stream based storage (such as files) and transport (such
   as TCP streams or pipes).  The media types defined in this document
   are needed to correctly identify such content when it is served over
   HTTP, included in multi-part documents, or used in other places where
   media types [RFC2045] are used.

2.  Changes Since RFC 3534

   o  The type "application/ogg" is redefined.

   o  The types "video/ogg" and "audio/ogg" are defined.

   o  New file extensions are defined.

   o  New Macintosh file type codes are defined.

   o  The codecs parameter is defined for optional use.

   o  The Ogg Skeleton extension becomes a recommended addition for
      content served under the new types.

Goncalves, et al.           Standards Track                     [Page 2]
RFC 5334                    Ogg Media Types               September 2008

3.  Conformance and Document Conventions

   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 BCP 14, [RFC2119] and
   indicate requirement levels for compliant implementations.
   Requirements apply to all implementations unless otherwise stated.