vorbis/doc/vorbisfile/ov_bitrate.html

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   4 <title>Vorbisfile - function - ov_bitrate</title>
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  11 <td><p class=tiny>Vorbisfile documentation</p></td>
  12 <td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
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  16 <h1>ov_bitrate</h1>
  17
  18 <p><i>declared in "vorbis/vorbisfile.h";</i></p>
  19
  20 <p>This function returns the average bitrate for the specified logical bitstream.  This may be different from the <a href=ov_info.html>ov_info->nominal_bitrate</a> value, as it is based on the actual average for this bitstream if the file is seekable.
  21 <p>Nonseekable files will return the nominal bitrate setting or the average of the upper and lower bounds, if any of these values are set.
  22 <p>
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  28 <pre><b>
  29 long ov_bitrate(OggVorbis_File *vf,int i);
  30 </b></pre>
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  35 <h3>Parameters</h3>
  36 <dl>
  37 <dt><i>vf</i></dt>
  38 <dd>A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile
  39 functions.</dd>
  40 <dt><i>i</i></dt>
  41 <dd>Link to the desired logical bitstream.  For nonseekable files, this argument is ignored.  To retrieve the bitrate for the entire bitstream, this parameter should be set to -1.</dd>
  42 </dl>
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  44
  45 <h3>Return Values</h3>
  46 <blockquote>
  47 <li>OV_EINVAL indicates that an invalid argument value was submitted or that the stream represented by <tt>vf</tt> is not open.</li>
  48 <li>OV_FALSE means the call returned a 'false' status, which in this case most likely indicates that the file is nonseekable and the upper, lower, and nominal bitrates were unset.
  49 <li><i>n</i> indicates the bitrate for the given logical bitstream or the entire
  50    physical bitstream.  If the file is open for random (seekable) access, it will
  51    find the *actual* average bitrate.  If the file is streaming (nonseekable), it
  52    returns the nominal bitrate (if set) or else the average of the
  53    upper/lower bounds (if set).</li>
  54 </blockquote>
  55 <p>
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  62 <td><p class=tiny>copyright &copy; 2000-2010 Xiph.Org</p></td>
  63 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td>
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  65 <td><p class=tiny>Vorbisfile documentation</p></td>
  66 <td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
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