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<title>vorbis - datatype - ovectl_ratemanage_arg</title>
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<td><p class=tiny>libvorbisenc documentation</p></td>
<td align=right><p class=tiny>libvorbisenc version 1.3.2 - 20101101</p></td>
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<h1>ovectl_ratemanage_arg</h1>

<p><i>declared in "vorbis/vorbisenc.h"</i></p>

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The ovectl_ratemanage_arg structure is used with <a
href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> and the OV_ECTL_RATEMANAGE_GET,
OV_ECTL_RATEMANAGE_SET, OV_ECTL_RATEMANAGE_AVG,
OV_ECTL_RATEMANAGE_HARD calls in order to query and modify specifics
of the encoder's bitrate management configuration.  Note that this is
a deprecated interface; please use vorbis_encode_ctl() with the <a
href="ovectl_ratemanage2_arg.html">ovectl_ratemanage2_arg</a> struct
and OV_ECTL_RATEMANAGE2_GET and OV_ECTL_RATEMANAGE2_SET calls in new
code.

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<pre><b>struct ovectl_ratemanage_arg {
  int    management_active;

  long   bitrate_hard_min;
  long   bitrate_hard_max;
  double bitrate_hard_window;

  long   bitrate_av_lo;
  long   bitrate_av_hi;
  double bitrate_av_window;
  double bitrate_av_window_center;
};</b></pre>
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<h3>Relevant Struct Members</h3>
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<dt><i>management_active</i></dt>
<dd>nonzero if bitrate management is active</dd>

<dt><i>bitrate_hard_min</i></dt>
<dd>hard lower limit (in kilobits per second) below which the stream bitrate will never be allowed for any given bitrate_hard_window seconds of time.</dd>
<dt><i>bitrate_hard_max</i></dt>
<dd>hard upper limit (in kilobits per second) above which the stream bitrate will never be allowed for any given bitrate_hard_window seconds of time.</dd>
<dt><i>bitrate_hard_window</i></dt>
<dd>the window period (in seconds) used to regulate the hard bitrate minimum and maximum</dd>

<dt><i>bitrate_av_lo</i></dt>
<dd>soft lower limit (in kilobits per second) below which the average bitrate tracker will start nudging the bitrate higher.</dd>
<dt><i>bitrate_av_hi</i></dt>
<dd>soft upper limit (in kilobits per second) above which the average bitrate tracker will start nudging the bitrate lower.</dd>
<dt><i>bitrate_av_window</i></dt>
<dd>the window period (in seconds) used to regulate the average bitrate minimum and maximum.</dd>
<dt><i>bitrate_av_window_center</i></dt>
<dd>Regulates the relative centering of the average and hard windows; in libvorbis 1.0 and 1.0.1, the hard window regulation overlapped but followed the average window regulation.  In libvorbis 1.1 a bit-reservoir interface replaces the old windowing interface; the older windowing interface is simulated and this field has no effect.</dd>

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<td><p class=tiny>copyright &copy; 2000-2010 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a></p></td>
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<td><p class=tiny>libvorbisenc documentation</p></td>
<td align=right><p class=tiny>libvorbisenc version 1.3.2 - 20101101</p></td>
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author	Chris Cannam
date	Fri, 07 Feb 2020 11:51:13 +0000
parents	05aa0afa9217
children