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MIME Type Registration of RTP Payload Formats
RFC 3555

Document type: RFC - Proposed Standard (July 2003; No errata)
Obsoleted by RFC 4855, RFC 4856
Updated by RFC 4629, RFC 3625
Document stream: IETF
Last updated: 2013-03-02
Other versions: plain text, pdf, html

IETF State: (None)
Consensus: Unknown
Document shepherd: No shepherd assigned

IESG State: RFC 3555 (Proposed Standard)
Responsible AD: Allison Mankin
IESG Note: Responsible: RFC Editor
Send notices to: <csp@csperkins.org>, <magnus.westerlund@ericsson.com>

Network Working Group                                          S. Casner
Request for Comments: 3555                                 Packet Design
Category: Standards Track                                     P. Hoschka
                                                           W3C/INRIA/MIT
                                                               July 2003

             MIME Type Registration of RTP Payload Formats

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

   This document defines the procedure to register RTP Payload Formats
   as audio, video or other MIME subtype names.  This is useful in a
   text-based format or control protocol to identify the type of an RTP
   transmission.  This document also registers all the RTP payload
   formats defined in the RTP Profile for Audio and Video Conferences as
   MIME subtypes.  Some of these may also be used for transfer modes
   other than RTP.

Table of Contents

   1. Introduction ..................................................  2
      1.1. IANA Considerations ......................................  2
      1.2. Terminology ..............................................  3
   2. Procedure For Registering MIME Types for RTP Payload Types ....  3
   3. Mapping to SDP Parameters .....................................  5
   4. Registrations for "Audio/Video Profile" .......................  6
      4.1. Audio Type Registrations .................................  6
      4.2. Video Type Registrations ................................. 30
   5. Security Considerations ....................................... 42
   6. Normative References .......................................... 43
   7. Authors' Addresses ............................................ 44
   8. Full Copyright Statement ...................................... 45

Casner & Hoschka            Standards Track                     [Page 1]
RFC 3555     MIME Type Registration of RTP Payload Formats     July 2003

1. Introduction

   The MIME registration procedure described in RFC 2048 [1] was
   originally designed for transport of multimedia information via
   asynchronous Internet mail, but the MIME namespace now provides
   identification for other transport modes as well.  This document
   defines the procedure to register MIME subtype names for use with the
   Real-time Transport Protocol (RTP), RFC 3550 [2], to identify RTP
   payload formats.

   This document also registers all the RTP payload formats defined in
   the RTP Profile for Audio and Video Conferences, RFC 3551 [3], as
   MIME subtypes under the "audio" and "video" MIME types.

1.1. IANA Considerations

   This document registers the following MIME subtypes:

      audio/DVI4
      audio/G722
      audio/G723
      audio/G726-16
      audio/G726-24
      audio/G726-32
      audio/G726-40
      audio/G728
      audio/G729
      audio/G729D
      audio/G729E
      audio/GSM
      audio/GSM-EFR
      audio/L8
      audio/L16
      audio/LPC
      audio/MPA
      audio/PCMA
      audio/PCMU
      audio/QCELP
      audio/RED
      audio/VDVI
      video/BT656
      video/CelB
      video/JPEG
      video/H261
      video/H263
      video/H263-1998
      video/H263-2000
      video/MPV

Casner & Hoschka            Standards Track                     [Page 2]
RFC 3555     MIME Type Registration of RTP Payload Formats     July 2003

      video/MP2T
      video/MP1S
      video/MP2P
      video/BMPEG
      video/nv

   MIME subtype audio/L16 has already been registered via RFC 2586 for
   transports other than RTP.  That registration is incorporated here
   and augmented with additional information for RTP transport.

1.2. Terminology

   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 [4] and
   indicate requirement levels for implementations compliant with this
   specification.

2. Procedure For Registering MIME Types for RTP Payload Types

   Registering an RTP payload type as a MIME type follows the same
   procedures as described in RFC 2048 and uses the registration

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