RFC 2424 (rfc2424) - Page 1 of 4


Content Duration MIME Header Definition



Alternative Format: Original Text Document



Network Working Group                                         G. Vaudreuil
Request for Comments: 2424                             Lucent Technologies
Category: Standards Track                                       G. Parsons
                                                          Northern Telecom
                                                            September 1998


                            Content Duration
                         MIME Header Definition

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 (1998).  All Rights Reserved.

Overview

   This document describes the MIME header Content-Duration that is
   intended for use with any timed media content (typically audio/* or
   video/*).

1.  Abstract

   This document describes the MIME header Content-Duration that is
   intended for use with any time varying media content (typically
   audio/* or video/*).  The length of time is represented in seconds
   without any units indication.

2. Content-Duration Header Field

   Time varying media contents, for example, a spoken voice message or a
   video clip, have an inherent time duration.  Many audio and video
   encodings may include their duration as header information or may
   allow accurate calculation based on the byte length of the data.
   However, it may be useful to present the time duration of the content
   in a MIME header to allow its simple determination without dealing
   with the actual content.







Vaudreuil & Parsons         Standards Track