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1 <html>
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2
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3 <head>
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4 <title>vorbis - datatype - ovectl_ratemanage_arg</title>
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5 <link rel=stylesheet href="style.css" type="text/css">
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6 </head>
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7
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8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
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9 <table border=0 width=100%>
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10 <tr>
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11 <td><p class=tiny>libvorbisenc documentation</p></td>
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12 <td align=right><p class=tiny>libvorbisenc version 1.3.2 - 20101101</p></td>
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13 </tr>
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14 </table>
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15
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16 <h1>ovectl_ratemanage_arg</h1>
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17
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18 <p><i>declared in "vorbis/vorbisenc.h"</i></p>
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19
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20 <p>
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21
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22 The ovectl_ratemanage_arg structure is used with <a
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23 href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> and the OV_ECTL_RATEMANAGE_GET,
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24 OV_ECTL_RATEMANAGE_SET, OV_ECTL_RATEMANAGE_AVG,
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25 OV_ECTL_RATEMANAGE_HARD calls in order to query and modify specifics
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26 of the encoder's bitrate management configuration. Note that this is
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27 a deprecated interface; please use vorbis_encode_ctl() with the <a
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28 href="ovectl_ratemanage2_arg.html">ovectl_ratemanage2_arg</a> struct
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29 and OV_ECTL_RATEMANAGE2_GET and OV_ECTL_RATEMANAGE2_SET calls in new
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30 code.
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31
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32 <p>
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33
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34 <table border=0 width=100% color=black cellspacing=0 cellpadding=7>
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35 <tr bgcolor=#cccccc>
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36 <td>
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37 <pre><b>struct ovectl_ratemanage_arg {
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38 int management_active;
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39
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40 long bitrate_hard_min;
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41 long bitrate_hard_max;
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42 double bitrate_hard_window;
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43
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44 long bitrate_av_lo;
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45 long bitrate_av_hi;
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46 double bitrate_av_window;
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47 double bitrate_av_window_center;
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48 };</b></pre>
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49 </td>
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50 </tr>
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51 </table>
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52
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53 <h3>Relevant Struct Members</h3>
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54 <dl>
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55
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56 <dt><i>management_active</i></dt>
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57 <dd>nonzero if bitrate management is active</dd>
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58
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59 <dt><i>bitrate_hard_min</i></dt>
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60 <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>
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61 <dt><i>bitrate_hard_max</i></dt>
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62 <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>
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63 <dt><i>bitrate_hard_window</i></dt>
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64 <dd>the window period (in seconds) used to regulate the hard bitrate minimum and maximum</dd>
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65
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66 <dt><i>bitrate_av_lo</i></dt>
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67 <dd>soft lower limit (in kilobits per second) below which the average bitrate tracker will start nudging the bitrate higher.</dd>
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68 <dt><i>bitrate_av_hi</i></dt>
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69 <dd>soft upper limit (in kilobits per second) above which the average bitrate tracker will start nudging the bitrate lower.</dd>
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70 <dt><i>bitrate_av_window</i></dt>
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71 <dd>the window period (in seconds) used to regulate the average bitrate minimum and maximum.</dd>
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72 <dt><i>bitrate_av_window_center</i></dt>
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73 <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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74
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75 </dl>
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76
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77
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78 <br><br>
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79 <hr noshade>
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80 <table border=0 width=100%>
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81 <tr valign=top>
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82 <td><p class=tiny>copyright © 2000-2010 Xiph.Org</p></td>
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83 <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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84 </tr><tr>
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85 <td><p class=tiny>libvorbisenc documentation</p></td>
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86 <td align=right><p class=tiny>libvorbisenc version 1.3.2 - 20101101</p></td>
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87 </tr>
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88 </table>
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89
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90 </body>
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91
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92 </html>
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