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175 lines
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<h3><a href="../index.html">Table Of Contents</a></h3>
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<ul>
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<li><a class="reference internal" href="#">Stream descriptors</a></li>
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<li><a class="reference internal" href="#hls-specific-stream-descriptor-fields">HLS specific stream descriptor fields</a></li>
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<div class="section" id="stream-descriptors">
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<h1>Stream descriptors<a class="headerlink" href="#stream-descriptors" title="Permalink to this headline">¶</a></h1>
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<p>There can be multiple <em>stream_descriptor</em> with input from the same “file” or
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multiple different “files”.</p>
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<p>Stream is of the form:</p>
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<div class="highlight-default"><div class="highlight"><pre><span></span><span class="p">{</span><span class="n">field</span><span class="p">}</span><span class="o">=</span><span class="p">{</span><span class="n">value</span><span class="p">}[,{</span><span class="n">field</span><span class="p">}</span><span class="o">=</span><span class="p">{</span><span class="n">value</span><span class="p">}]</span><span class="o">...</span>
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</pre></div>
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</div>
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<p>These are the available fields:</p>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field-odd field"><th class="field-name">input (in):</th><td class="field-body">input/source media “file” path, which can be regular files, pipes, udp
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streams. See <a class="reference internal" href="udp_file_options.html"><span class="doc">UDP file options</span></a> on additional options for UDP
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files.</td>
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</tr>
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<tr class="field-even field"><th class="field-name" colspan="2">stream_selector (stream):</th></tr>
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<tr class="field-even field"><td> </td><td class="field-body">Required field with value ‘audio’, ‘video’, ‘text’ or stream number (zero
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based).</td>
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</tr>
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<tr class="field-odd field"><th class="field-name">output (out):</th><td class="field-body">Required output file path (single file).</td>
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</tr>
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<tr class="field-even field"><th class="field-name">init_segment:</th><td class="field-body">initialization segment path (multiple file).</td>
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</tr>
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<tr class="field-odd field"><th class="field-name" colspan="2">segment_template (segment):</th></tr>
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<tr class="field-odd field"><td> </td><td class="field-body">Optional value which specifies the naming pattern for the segment files,
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and that the stream should be split into multiple files. Its presence should
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be consistent across streams. See
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<a class="reference internal" href="segment_template_formatting.html"><span class="doc">Segment template formatting</span></a>.</td>
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</tr>
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<tr class="field-even field"><th class="field-name">bandwidth (bw):</th><td class="field-body">Optional value which contains a user-specified content bit rate for the
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stream, in bits/sec. If specified, this value is propagated to (HLS)
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EXT-X-STREAM-INF:BANDWIDTH or (DASH) Representation@bandwidth and the
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$Bandwidth$ template parameter for segment names. If not specified, the
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bandwidth value is estimated from content bitrate. Note that it only affects
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the generated manifests/playlists; it has no effect on the media content
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itself.</td>
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</tr>
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<tr class="field-odd field"><th class="field-name" colspan="2">language (lang):</th></tr>
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<tr class="field-odd field"><td> </td><td class="field-body">Optional value which contains a user-specified language tag. If specified,
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this value overrides any language metadata in the input stream.</td>
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</tr>
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<tr class="field-even field"><th class="field-name" colspan="2">output_format (format):</th></tr>
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<tr class="field-even field"><td> </td><td class="field-body">Optional value which specifies the format of the output files (MP4 or WebM).
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If not specified, it will be derived from the file extension of the output
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file.</td>
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</tr>
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<tr class="field-odd field"><th class="field-name" colspan="2">skip_encryption=0|1:</th></tr>
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<tr class="field-odd field"><td> </td><td class="field-body">Optional. Defaults to 0 if not specified. If it is set to 1, no encryption
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of the stream will be made.</td>
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</tr>
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<tr class="field-even field"><th class="field-name" colspan="2">trick_play_factor (tpf):</th></tr>
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<tr class="field-even field"><td> </td><td class="field-body">Optional value which specifies the trick play, a.k.a. trick mode, stream
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sampling rate among key frames. If specified, the output is a trick play
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stream.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="section" id="hls-specific-stream-descriptor-fields">
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<h1>HLS specific stream descriptor fields<a class="headerlink" href="#hls-specific-stream-descriptor-fields" title="Permalink to this headline">¶</a></h1>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field-odd field"><th class="field-name">hls_name:</th><td class="field-body">Required for audio when outputting HLS. name of the output stream. This is
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not (necessarily) the same as output. This is used as the NAME attribute for
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EXT-X-MEDIA.</td>
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</tr>
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<tr class="field-even field"><th class="field-name">hls_group_id:</th><td class="field-body">Required for audio when outputting HLS. The group ID for the output stream.
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This is used as the GROUP-ID attribute for EXT-X-MEDIA.</td>
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</tr>
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<tr class="field-odd field"><th class="field-name">playlist_name:</th><td class="field-body">Required for HLS output. Name of the playlist for the stream. Usually ends
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with ‘.m3u8’.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="clearer"></div>
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</div>
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<div class="related" role="navigation" aria-label="related navigation">
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<h3>Navigation</h3>
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<ul>
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<li class="right" style="margin-right: 10px">
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<a href="../genindex.html" title="General Index"
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>index</a></li>
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<li class="nav-item nav-item-0"><a href="../index.html">Shaka Packager documentation</a> »</li>
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© Copyright 2017, Google.
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