<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Context options</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="oggvorbis.constants.html">Predefined Constants</a></div>
<div class="next" style="text-align: right; float: right;"><a href="oggvorbis.examples.html">Examples</a></div>
<div class="up"><a href="book.oggvorbis.html">oggvorbis</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="oggvorbis.contexts" class="chapter">
<h1>Context options</h1>
<table class="doctable table">
<caption><strong>OGG/Vorbis tuning options</strong></caption>
<thead>
<tr>
<th>Option</th>
<th>Definition</th>
<th>Relevance</th>
<th>Default</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>pcm_mode</td>
<td>PCM byte encoding used. See constants below.</td>
<td>Read / Write</td>
<td><strong><code>OGGVORBIS_PCM_S16_LE</code></strong></td>
</tr>
<tr>
<td>rate</td>
<td>PCM Sampling rate. Measured in Hz.</td>
<td>Write only</td>
<td><strong><code>44100</code></strong></td>
</tr>
<tr>
<td>bitrate</td>
<td>
Vorbis Average Bitrate Encoding / Variable Bitrate Encoding.
Measured in bps (ABR) or Quality level (VBR: 0.0 to 1.0).
128000 ABR is rough equal to 0.4 VBR.
</td>
<td>Write only</td>
<td><strong><code>128000</code></strong></td>
</tr>
<tr>
<td>channels</td>
<td>Number of PCM channels. 1 == Mono, 2 == Stereo.</td>
<td>Write only</td>
<td><strong><code>2</code></strong></td>
</tr>
<tr>
<td>serialno</td>
<td>
Serial Number of stream within file. Must be unique within file.
Because of the potential to select a duplicate serial number within
a chained file, make efforts to manually assign unique numbers when
encoding.
</td>
<td>Write only</td>
<td><em class="emphasis">Random</em></td>
</tr>
<tr>
<td>comments</td>
<td>
Associative array of file comments.
Will be translated to <em>strtoupper($name) . "=$value"</em>.
Note: This context option is not available in oggvorbis-0.1
</td>
<td>Write only</td>
<td><em>array('ENCODER' => 'PHP/OggVorbis, http://pear.php.net/oggvorbis')</em></td>
</tr>
</tbody>
</table>
</div>
<hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="oggvorbis.constants.html">Predefined Constants</a></div>
<div class="next" style="text-align: right; float: right;"><a href="oggvorbis.examples.html">Examples</a></div>
<div class="up"><a href="book.oggvorbis.html">oggvorbis</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
