379 lines
20 KiB
HTML
379 lines
20 KiB
HTML
|
||
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
|
||
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
||
<html xmlns="http://www.w3.org/1999/xhtml">
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
<title>HLS — Shaka Packager documentation</title>
|
||
<link rel="stylesheet" href="../_static/sphinxdoc_new.css" type="text/css" />
|
||
<link rel="stylesheet" href="../_static/pygments.css" type="text/css" />
|
||
<link rel="stylesheet" href="../_static/table_styling.css" type="text/css" />
|
||
<script type="text/javascript">
|
||
var DOCUMENTATION_OPTIONS = {
|
||
URL_ROOT: '../',
|
||
VERSION: '',
|
||
COLLAPSE_INDEX: false,
|
||
FILE_SUFFIX: '.html',
|
||
HAS_SOURCE: true,
|
||
SOURCELINK_SUFFIX: '.txt'
|
||
};
|
||
</script>
|
||
<script type="text/javascript" src="../_static/jquery.js"></script>
|
||
<script type="text/javascript" src="../_static/underscore.js"></script>
|
||
<script type="text/javascript" src="../_static/doctools.js"></script>
|
||
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
|
||
<link rel="index" title="Index" href="../genindex.html" />
|
||
<link rel="search" title="Search" href="../search.html" />
|
||
<link rel="next" title="Live" href="live.html" />
|
||
<link rel="prev" title="DASH" href="dash.html" />
|
||
</head>
|
||
<body>
|
||
<div class="related" role="navigation" aria-label="related navigation">
|
||
<h3>Navigation</h3>
|
||
<ul>
|
||
<li class="right" style="margin-right: 10px">
|
||
<a href="../genindex.html" title="General Index"
|
||
accesskey="I">index</a></li>
|
||
<li class="right" >
|
||
<a href="live.html" title="Live"
|
||
accesskey="N">next</a> |</li>
|
||
<li class="right" >
|
||
<a href="dash.html" title="DASH"
|
||
accesskey="P">previous</a> |</li>
|
||
<li class="nav-item nav-item-0"><a href="../index.html">Shaka Packager documentation</a> »</li>
|
||
<li class="nav-item nav-item-1"><a href="tutorials.html" accesskey="U">Tutorials</a> »</li>
|
||
</ul>
|
||
</div>
|
||
<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
|
||
<div class="sphinxsidebarwrapper">
|
||
<h3><a href="../index.html">Table Of Contents</a></h3>
|
||
<ul>
|
||
<li><a class="reference internal" href="#">HLS</a><ul>
|
||
<li><a class="reference internal" href="#synopsis">Synopsis</a></li>
|
||
<li><a class="reference internal" href="#examples">Examples</a></li>
|
||
<li><a class="reference internal" href="#configuration-options">Configuration options</a><ul>
|
||
<li><a class="reference internal" href="#hls-specific-stream-descriptor-fields">HLS specific stream descriptor fields</a></li>
|
||
<li><a class="reference internal" href="#hls-options">HLS options</a></li>
|
||
<li><a class="reference internal" href="#segment-template-formatting">Segment template formatting</a></li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
|
||
<h4>Previous topic</h4>
|
||
<p class="topless"><a href="dash.html"
|
||
title="previous chapter">DASH</a></p>
|
||
<h4>Next topic</h4>
|
||
<p class="topless"><a href="live.html"
|
||
title="next chapter">Live</a></p>
|
||
<div role="note" aria-label="source link">
|
||
<h3>This Page</h3>
|
||
<ul class="this-page-menu">
|
||
<li><a href="../_sources/tutorials/hls.rst.txt"
|
||
rel="nofollow">Show Source</a></li>
|
||
</ul>
|
||
</div>
|
||
<div id="searchbox" style="display: none" role="search">
|
||
<h3>Quick search</h3>
|
||
<form class="search" action="../search.html" method="get">
|
||
<div><input type="text" name="q" /></div>
|
||
<div><input type="submit" value="Go" /></div>
|
||
<input type="hidden" name="check_keywords" value="yes" />
|
||
<input type="hidden" name="area" value="default" />
|
||
</form>
|
||
</div>
|
||
<script type="text/javascript">$('#searchbox').show(0);</script>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="document">
|
||
<div class="documentwrapper">
|
||
<div class="bodywrapper">
|
||
<div class="body" role="main">
|
||
|
||
<div class="section" id="hls">
|
||
<h1>HLS<a class="headerlink" href="#hls" title="Permalink to this headline">¶</a></h1>
|
||
<p>HTTP Live Streaming (also known as HLS) is an HTTP-based media streaming
|
||
communications protocol implemented by Apple Inc. as part of its QuickTime,
|
||
Safari, OS X, and iOS software. It resembles MPEG-DASH in that it works by
|
||
breaking the overall stream into a sequence of small HTTP-based file downloads,
|
||
each download loading one short chunk of an overall potentially unbounded
|
||
transport stream. As the stream is played, the client may select from a number
|
||
of different alternate streams containing the same material encoded at a variety
|
||
of data rates, allowing the streaming session to adapt to the available data
|
||
rate. At the start of the streaming session, HLS downloads an extended M3U
|
||
playlist containing the metadata for the various sub-streams which are
|
||
available.</p>
|
||
<p>Shaka Packager supports HLS content packaging. This tutorial covers HLS
|
||
packaging of VOD content without encryption. For live content packaging, see
|
||
<a class="reference internal" href="live.html"><span class="doc">Live</span></a>; for content encryption, see <a class="reference internal" href="drm.html"><span class="doc">DRM</span></a>; for full documentation,
|
||
see <a class="reference internal" href="../documentation.html"><span class="doc">Packager Documentation</span></a>.</p>
|
||
<div class="section" id="synopsis">
|
||
<h2>Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this headline">¶</a></h2>
|
||
<div class="highlight-default"><div class="highlight"><pre><span></span>$ packager <stream_descriptor> ... \
|
||
--hls_master_playlist_output <master_playlist_output_path> \
|
||
[Other HLS options] \
|
||
[Other options, e.g. DRM options, DASH options]
|
||
</pre></div>
|
||
</div>
|
||
<p>See <a class="reference internal" href="#hls-specific-stream-descriptor-fields">HLS specific stream descriptor fields</a> for the available HLS specific
|
||
stream descriptor fields.</p>
|
||
<p>See <a class="reference internal" href="#hls-options">HLS options</a> for the available HLS related options.</p>
|
||
<div class="admonition note">
|
||
<p class="first admonition-title">Note</p>
|
||
<p class="last">DASH and HLS options can both be specified to output DASH and HLS manifests
|
||
at the same time. Note that it works only for MP4 outputs.</p>
|
||
</div>
|
||
</div>
|
||
<div class="section" id="examples">
|
||
<h2>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h2>
|
||
<p>The examples below uses the H264 streams created in <a class="reference internal" href="encoding.html"><span class="doc">Media Encoding</span></a>.</p>
|
||
<ul>
|
||
<li><p class="first">TS output with elementary audio:</p>
|
||
<div class="highlight-default"><div class="highlight"><pre><span></span>$ packager \
|
||
'in=h264_baseline_360p_600.mp4,stream=audio,segment_template=audio/$Number$.aac,playlist_name=audio/main.m3u8,hls_group_id=audio,hls_name=ENGLISH' \
|
||
'in=input_text.vtt,stream=text,segment_template=text/$Number$.vtt,playlist_name=text/main.m3u8,hls_group_id=text,hls_name=ENGLISH' \
|
||
'in=h264_baseline_360p_600.mp4,stream=video,segment_template=h264_360p/$Number$.ts,playlist_name=h264_360p/main.m3u8,iframe_playlist_name=h264_360p/iframe.m3u8' \
|
||
'in=h264_main_480p_1000.mp4,stream=video,segment_template=h264_480p/$Number$.ts,playlist_name=h264_480p/main.m3u8,iframe_playlist_name=h264_480p/iframe.m3u8' \
|
||
'in=h264_main_720p_3000.mp4,stream=video,segment_template=h264_720p/$Number$.ts,playlist_name=h264_720p/main.m3u8,iframe_playlist_name=h264_720p/iframe.m3u8' \
|
||
'in=h264_high_1080p_6000.mp4,stream=video,segment_template=h264_1080p/$Number$.ts,playlist_name=h264_1080p/main.m3u8,iframe_playlist_name=h264_1080p/iframe.m3u8' \
|
||
--hls_master_playlist_output h264_master.m3u8
|
||
</pre></div>
|
||
</div>
|
||
</li>
|
||
</ul>
|
||
<p>The above packaging command creates five single track TS streams
|
||
(4 video, 1 audio) and HLS playlists, which describe the streams.</p>
|
||
<ul>
|
||
<li><p class="first">MP4 output is also supported:</p>
|
||
<div class="highlight-default"><div class="highlight"><pre><span></span>$ packager \
|
||
'in=h264_baseline_360p_600.mp4,stream=audio,init_segment=audio/init.mp4,segment_template=audio/$Number$.m4s,playlist_name=audio/main.m3u8,hls_group_id=audio,hls_name=ENGLISH' \
|
||
'in=input_text.vtt,stream=text,segment_template=text/$Number$.vtt,playlist_name=text/main.m3u8,hls_group_id=text,hls_name=ENGLISH' \
|
||
'in=h264_baseline_360p_600.mp4,stream=video,init_segment=h264_360p/init.mp4,segment_template=h264_360p/$Number$.m4s,playlist_name=h264_360p/main.m3u8,iframe_playlist_name=h264_360p/iframe.m3u8' \
|
||
'in=h264_main_480p_1000.mp4,stream=video,init_segment=h264_480p/init.mp4,segment_template=h264_480p/$Number$.m4s,playlist_name=h264_480p/main.m3u8,iframe_playlist_name=h264_480p/iframe.m3u8' \
|
||
'in=h264_main_720p_3000.mp4,stream=video,init_segment=h264_720p/init.mp4,segment_template=h264_720p/$Number$.m4s,playlist_name=h264_720p/main.m3u8,iframe_playlist_name=h264_720p/iframe.m3u8' \
|
||
'in=h264_high_1080p_6000.mp4,stream=video,init_segment=h264_1080p/init.mp4,segment_template=h264_1080p/$Number$.m4s,playlist_name=h264_1080p/main.m3u8,iframe_playlist_name=h264_1080p/iframe.m3u8' \
|
||
--hls_master_playlist_output h264_master.m3u8
|
||
</pre></div>
|
||
</div>
|
||
</li>
|
||
</ul>
|
||
<p>The above packaging command creates five groups of streams (each with an init
|
||
segment and a series of media segments) and HLS playlists, which describe the
|
||
streams.</p>
|
||
<ul>
|
||
<li><p class="first">Single file MP4 output is also supported:</p>
|
||
<div class="highlight-default"><div class="highlight"><pre><span></span>$ packager \
|
||
in=h264_baseline_360p_600.mp4,stream=audio,output=audio.mp4,playlist_name=audio.m3u8,hls_group_id=audio,hls_name=ENGLISH \
|
||
in=h264_baseline_360p_600.mp4,stream=video,output=h264_360p.mp4,playlist_name=h264_360p.m3u8 \
|
||
in=h264_main_480p_1000.mp4,stream=video,output=h264_480p.mp4,playlist_name=h264_480p.m3u8 \
|
||
in=h264_main_720p_3000.mp4,stream=video,output=h264_720p.mp4,playlist_name=h264_720p.m3u8 \
|
||
in=h264_high_1080p_6000.mp4,stream=video,output=h264_1080p.mp4,playlist_name=h264_1080p.m3u8 \
|
||
--hls_master_playlist_output h264_master.m3u8
|
||
</pre></div>
|
||
</div>
|
||
</li>
|
||
</ul>
|
||
<p>The above packaging command creates five single file MP4 streams and HLS
|
||
playlists, which describe the streams.</p>
|
||
<ul>
|
||
<li><p class="first">Single file MP4 output with DASH + HLS:</p>
|
||
<div class="highlight-default"><div class="highlight"><pre><span></span>$ packager \
|
||
in=h264_baseline_360p_600.mp4,stream=audio,output=audio.mp4,playlist_name=audio.m3u8,hls_group_id=audio,hls_name=ENGLISH \
|
||
in=h264_baseline_360p_600.mp4,stream=video,output=h264_360p.mp4,playlist_name=h264_360p.m3u8,iframe_playlist_name=h264_360p_iframe.m3u8 \
|
||
in=h264_main_480p_1000.mp4,stream=video,output=h264_480p.mp4,playlist_name=h264_480p.m3u8,iframe_playlist_name=h264_480p_iframe.m3u8 \
|
||
in=h264_main_720p_3000.mp4,stream=video,output=h264_720p.mp4,playlist_name=h264_720p.m3u8,iframe_playlist_name=h264_720p_iframe.m3u8 \
|
||
in=h264_high_1080p_6000.mp4,stream=video,output=h264_1080p.mp4,playlist_name=h264_1080p.m3u8,iframe_playlist_name=h264_1080p_iframe.m3u8 \
|
||
--hls_master_playlist_output h264_master.m3u8 \
|
||
--mpd_output h264.mpd
|
||
</pre></div>
|
||
</div>
|
||
</li>
|
||
</ul>
|
||
<p>The above packaging command creates five single file MP4 streams, and HLS
|
||
playlists as well as DASH manifests.</p>
|
||
</div>
|
||
<div class="section" id="configuration-options">
|
||
<h2>Configuration options<a class="headerlink" href="#configuration-options" title="Permalink to this headline">¶</a></h2>
|
||
<div class="section" id="hls-specific-stream-descriptor-fields">
|
||
<h3>HLS specific stream descriptor fields<a class="headerlink" href="#hls-specific-stream-descriptor-fields" title="Permalink to this headline">¶</a></h3>
|
||
<table class="docutils field-list" frame="void" rules="none">
|
||
<col class="field-name" />
|
||
<col class="field-body" />
|
||
<tbody valign="top">
|
||
<tr class="field-odd field"><th class="field-name">hls_name:</th><td class="field-body">Used for HLS audio to set the NAME attribute for EXT-X-MEDIA.
|
||
Defaults to the base of the playlist name.</td>
|
||
</tr>
|
||
<tr class="field-even field"><th class="field-name">hls_group_id:</th><td class="field-body">Used for HLS audio to set the GROUP-ID attribute for EXT-X-MEDIA.
|
||
Defaults to ‘audio’ if not specified.</td>
|
||
</tr>
|
||
<tr class="field-odd field"><th class="field-name">playlist_name:</th><td class="field-body">The HLS playlist file to create. Usually ends with ‘.m3u8’, and is
|
||
relative to hls_master_playlist_output (see below). If unspecified,
|
||
defaults to something of the form ‘stream_0.m3u8’, ‘stream_1.m3u8’,
|
||
‘stream_2.m3u8’, etc.</td>
|
||
</tr>
|
||
<tr class="field-even field"><th class="field-name" colspan="2">iframe_playlist_name:</th></tr>
|
||
<tr class="field-even field"><td> </td><td class="field-body">The optional HLS I-Frames only playlist file to create. Usually ends with
|
||
‘.m3u8’, and is relative to hls_master_playlist_output (see below). Should
|
||
only be set for video streams. If unspecified, no I-Frames only playlist is
|
||
created.</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<div class="section" id="hls-options">
|
||
<h3>HLS options<a class="headerlink" href="#hls-options" title="Permalink to this headline">¶</a></h3>
|
||
<table class="docutils option-list" frame="void" rules="none">
|
||
<col class="option" />
|
||
<col class="description" />
|
||
<tbody valign="top">
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--hls_master_playlist_output <var><file_path></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td>Output path for the master playlist for HLS. This flag must be used to
|
||
output HLS.</td></tr>
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--hls_base_url <var><url></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td>The base URL for the Media Playlists and media files listed in the
|
||
playlists. This is the prefix for the files.</td></tr>
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--hls_key_uri <var><uri></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td>The key uri for ‘identity’ and ‘com.apple.streamingkeydelivery’ (FairPlay)
|
||
key formats. Ignored if the playlist is not encrypted or not using the above
|
||
key formats.</td></tr>
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--hls_playlist_type <var><type></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td>VOD, EVENT, or LIVE. This defines the EXT-X-PLAYLIST-TYPE in the HLS
|
||
specification. For hls_playlist_type of LIVE, EXT-X-PLAYLIST-TYPE tag is
|
||
omitted.</td></tr>
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--time_shift_buffer_depth <var><seconds></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td>Guaranteed duration of the time shifting buffer for LIVE playlists, in
|
||
seconds.</td></tr>
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--preserved_segments_outside_live_window <var><num_segments></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td><p class="first">Segments outside the live window (defined by <cite>time_shift_buffer_depth</cite>
|
||
above) are automatically removed except for the most recent X segments
|
||
defined by this parameter. This is needed to accommodate latencies in
|
||
various stages of content serving pipeline, so that the segments stay
|
||
accessible as they may still be accessed by the player.</p>
|
||
<p class="last">The segments are not removed if the value is zero.</p>
|
||
</td></tr>
|
||
<tr><td class="option-group" colspan="2">
|
||
<kbd><span class="option">--default_language <var><language></var></span></kbd></td>
|
||
</tr>
|
||
<tr><td> </td><td>The first audio/text rendition in a group tagged with this language will
|
||
have ‘DEFAULT’ attribute set to ‘YES’. This allows the player to choose the
|
||
correct default language for the content.</td></tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<div class="section" id="segment-template-formatting">
|
||
<h3>Segment template formatting<a class="headerlink" href="#segment-template-formatting" title="Permalink to this headline">¶</a></h3>
|
||
<p>The implementation is based on <em>Template-based Segment URL construction</em>
|
||
described in ISO/IEC 23009-1:2014.</p>
|
||
<table border="1" class="styled-table docutils" id="id1">
|
||
<caption><span class="caption-text">Supported identifiers</span><a class="headerlink" href="#id1" title="Permalink to this table">¶</a></caption>
|
||
<colgroup>
|
||
<col width="19%" />
|
||
<col width="41%" />
|
||
<col width="41%" />
|
||
</colgroup>
|
||
<thead valign="bottom">
|
||
<tr class="row-odd"><th class="left-align head">$<Identifier>$</th>
|
||
<th class="left-align head">Substitution parameter</th>
|
||
<th class="left-align head">Format</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody valign="top">
|
||
<tr class="row-even"><td class="left-align">$$</td>
|
||
<td class="left-align">is an escape sequence, i.e.
|
||
“$$” is replaced with a single
|
||
“$”.</td>
|
||
<td class="left-align">Not applicable.</td>
|
||
</tr>
|
||
<tr class="row-odd"><td class="left-align">$Number$</td>
|
||
<td class="left-align">This identifier is substitued
|
||
with the <em>number</em> of the
|
||
corresponding Segment.</td>
|
||
<td class="left-align"><p class="first">The format tag may be present.</p>
|
||
<p class="last">If no format tag is present, a
|
||
default format tag with
|
||
<em>width</em>=1 shall be used.</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="row-even"><td class="left-align">$Time$</td>
|
||
<td class="left-align">This identifier is substituted
|
||
with the value of the
|
||
<strong>SegmentTimeline@t</strong>
|
||
attribute for the Segment
|
||
being accessed. Either
|
||
$Number$ or $Time$ may be used
|
||
but not both at the same time.</td>
|
||
<td class="left-align"><p class="first">The format tag may be present.</p>
|
||
<p class="last">If no format tag is present, a
|
||
default format tag with
|
||
<em>width</em>=1 shall be used.</p>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<div class="admonition note">
|
||
<p class="first admonition-title">Note</p>
|
||
<p class="last">Identifiers $RepresentationID$ and $Bandwidth$ are not supported in this
|
||
version. Please file an <a class="reference external" href="https://github.com/google/shaka-packager/issues">issue</a> if you want it to be
|
||
supported.</p>
|
||
</div>
|
||
<p>In each URL, the identifiers shall be replaced by the substitution parameter
|
||
per the definition in the above table. Identifier matching is case-sensitive.</p>
|
||
<p>Each identifier may be suffixed, within the enclosing ‘$’ characters, with an
|
||
additional format tag aligned with the <em>printf</em> format tag as defined in IEEE
|
||
1003.1-2008 following this prototype:</p>
|
||
<div class="highlight-default"><div class="highlight"><pre><span></span><span class="o">%</span><span class="mi">0</span><span class="p">[</span><span class="n">width</span><span class="p">]</span><span class="n">d</span>
|
||
</pre></div>
|
||
</div>
|
||
<p>The <em>width</em> parameter is an unsigned integer that provides the minimum number
|
||
of characters to be printed. If the value to be printed is shorter than this
|
||
number, the result shall be padded with zeros. The value is not truncated even
|
||
if the result is larger.</p>
|
||
<p>Strings outside identifiers shall only contain characters that are permitted
|
||
within URLs according to RFC 3986.</p>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
</div>
|
||
<div class="clearer"></div>
|
||
</div>
|
||
<div class="related" role="navigation" aria-label="related navigation">
|
||
<h3>Navigation</h3>
|
||
<ul>
|
||
<li class="right" style="margin-right: 10px">
|
||
<a href="../genindex.html" title="General Index"
|
||
>index</a></li>
|
||
<li class="right" >
|
||
<a href="live.html" title="Live"
|
||
>next</a> |</li>
|
||
<li class="right" >
|
||
<a href="dash.html" title="DASH"
|
||
>previous</a> |</li>
|
||
<li class="nav-item nav-item-0"><a href="../index.html">Shaka Packager documentation</a> »</li>
|
||
<li class="nav-item nav-item-1"><a href="tutorials.html" >Tutorials</a> »</li>
|
||
</ul>
|
||
</div>
|
||
<div class="footer" role="contentinfo">
|
||
© Copyright 2017, Google.
|
||
Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.6.7.
|
||
</div>
|
||
</body>
|
||
</html> |