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<title>libvorbisenc - function - vorbis_encode_init</title>
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<td><p class=tiny>libvorbisenc documentation</p></td>
<td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td>
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<h1>vorbis_encode_init</h1>
<p><i>declared in "vorbis/libvorbisenc.h";</i></p>
<p>This is the primary function within libvorbisenc for setting up managed bitrate modes.
<p>Before this function is called, the <a href="vorbis_info.html">vorbis_info</a> struct should be initialized by using vorbis_info_init() from the libvorbis API. After encoding, vorbis_info_clear should be called.
<p>The max_bitrate, nominal_bitrate, and min_bitrate settings are used to set constraints for the encoded file. This function uses these settings to select the appropriate encoding mode and set it up.
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<pre><b>
extern int vorbis_encode_init(<a href="vorbis_info.html">vorbis_info</a> *vi,
long channels,
long rate,
long max_bitrate,
long nominal_bitrate,
long min_bitrate);
</b></pre>
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<h3>Parameters</h3>
<dl>
<dt><i>vi</i></dt>
<dd>File pointer to an initialized <a href="vorbis_info.html">vorbis_info</a> struct.</dd>
<dt><i>channels</i></dt>
<dd>The number of channels to be encoded.</dd>
<dt><i>rate</i></dt>
<dd>The sampling rate of the source audio.</dd>
<dt><i>max_bitrate</i></dt>
<dd>Desired maximum bitrate (limit). -1 indicates unset.</dd>
<dt><i>nominal_bitrate</i></dt>
<dd>Desired average, or central, bitrate. -1 indicates unset.</dd>
<dt><i>min_bitrate</i></dt>
<dd>Desired minimum bitrate. -1 indicates unset.</dd>
</dl>
<h3>Return Values</h3>
<blockquote>
<li>
0 for success</li>
<li>less than zero for failure:</li>
<ul>
<li>OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.</li>
<li>OV_EINVAL - Invalid setup request, eg, out of range argument. </li>
<li>OV_EIMPL - Unimplemented mode; unable to comply with bitrate request.</li>
</ul>
</blockquote>
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<td><p class=tiny>copyright &copy; 2004 xiph.org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a><br><a href="mailto:team@vorbis.org">team@vorbis.org</a></p></td>
</tr><tr>
<td><p class=tiny>libvorbisenc documentation</p></td>
<td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td>
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