HTTP Live Streaming 2nd Edition
draft-pantos-hls-rfc8216bis-05

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Informational                                             R. Pantos, Ed.
Internet-Draft                                                Apple Inc.
Obsoletes: 8216 (if approved)                         September 23, 2019
Intended status: Informational
Expires: March 26, 2020

                    HTTP Live Streaming 2nd Edition
                     draft-pantos-hls-rfc8216bis-05

Abstract

   This document obsoletes RFC 8216.  It describes a protocol for
   transferring unbounded streams of multimedia data.  It specifies the
   data format of the files and the actions to be taken by the server
   (sender) and the clients (receivers) of the streams.  It describes
   version 8 of this protocol.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on March 26, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Pantos                   Expires March 26, 2020                 [Page 1]
Internet-Draft       HTTP Live Streaming 2nd Edition      September 2019

   This Informational Internet Draft is submitted as an RFC Editor
   Contribution and/or non-IETF Document (not as a Contribution, IETF
   Contribution, nor IETF Document) in accordance with BCP 78 and BCP
   79.

Table of Contents

   1.  Introduction to HTTP Live Streaming . . . . . . . . . . . . .   5
   2.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Media Segments  . . . . . . . . . . . . . . . . . . . . . . .   7
     3.1.  Supported Media Segment Formats . . . . . . . . . . . . .   7
     3.2.  MPEG-2 Transport Streams  . . . . . . . . . . . . . . . .   8
     3.3.  Fragmented MPEG-4 . . . . . . . . . . . . . . . . . . . .   8
     3.4.  Packed Audio  . . . . . . . . . . . . . . . . . . . . . .   9
     3.5.  WebVTT  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.6.  IMSC Subtitles  . . . . . . . . . . . . . . . . . . . . .  10
   4.  Playlists . . . . . . . . . . . . . . . . . . . . . . . . . .  11
     4.1.  Definition of a Playlist  . . . . . . . . . . . . . . . .  11
     4.2.  Attribute Lists . . . . . . . . . . . . . . . . . . . . .  12
     4.3.  Variable Substitution . . . . . . . . . . . . . . . . . .  13
     4.4.  Playlist Tags . . . . . . . . . . . . . . . . . . . . . .  14
       4.4.1.  Basic Tags  . . . . . . . . . . . . . . . . . . . . .  14
         4.4.1.1.  EXTM3U  . . . . . . . . . . . . . . . . . . . . .  14
         4.4.1.2.  EXT-X-VERSION . . . . . . . . . . . . . . . . . .  14
       4.4.2.  Media Segment Tags  . . . . . . . . . . . . . . . . .  15
         4.4.2.1.  EXTINF  . . . . . . . . . . . . . . . . . . . . .  15
         4.4.2.2.  EXT-X-BYTERANGE . . . . . . . . . . . . . . . . .  15
         4.4.2.3.  EXT-X-DISCONTINUITY . . . . . . . . . . . . . . .  16
         4.4.2.4.  EXT-X-KEY . . . . . . . . . . . . . . . . . . . .  16
         4.4.2.5.  EXT-X-MAP . . . . . . . . . . . . . . . . . . . .  18
         4.4.2.6.  EXT-X-PROGRAM-DATE-TIME . . . . . . . . . . . . .  19
         4.4.2.7.  EXT-X-GAP . . . . . . . . . . . . . . . . . . . .  20
         4.4.2.8.  EXT-X-BITRATE . . . . . . . . . . . . . . . . . .  20
       4.4.3.  Media Metadata Tags . . . . . . . . . . . . . . . . .  20
         4.4.3.1.  EXT-X-DATERANGE . . . . . . . . . . . . . . . . .  20
           4.4.3.1.1.  Mapping SCTE-35 into EXT-X-DATERANGE  . . . .  22
       4.4.4.  Media Playlist Tags . . . . . . . . . . . . . . . . .  24
         4.4.4.1.  EXT-X-TARGETDURATION  . . . . . . . . . . . . . .  24
         4.4.4.2.  EXT-X-MEDIA-SEQUENCE  . . . . . . . . . . . . . .  25
         4.4.4.3.  EXT-X-DISCONTINUITY-SEQUENCE  . . . . . . . . . .  25
         4.4.4.4.  EXT-X-ENDLIST . . . . . . . . . . . . . . . . . .  26
         4.4.4.5.  EXT-X-PLAYLIST-TYPE . . . . . . . . . . . . . . .  26