1 <html> 2 3 <head> 4 <title>vorbis - datatype - ov_ectl_ratemanage_arg</title> 5 <link rel=stylesheet href="style.css" type="text/css"> 6 </head> 7 8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff"> 9 <table border=0 width=100%> 10 <tr> 11 <td><p class=tiny>libvorbisenc documentation</p></td> 12 <td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td> 13 </tr> 14 </table> 15 16 <h1>ov_ectl_ratemanage_arg</h1> 17 18 <p><i>declared in "vorbis/vorbisenc.h"</i></p> 19 20 <p> 21 22 The ov_ectl_ratemanage_arg structure is used with <a 23 href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> and the OV_ECTL_RATEMANAGE_GET, 24 OV_ECTL_RATEMANAGE_SET, OV_ECTL_RATEMANAGE_AVG, 25 OV_ECTL_RATEMANAGE_HARD calls in order to query and modify specifics 26 of the encoder's bitrate management configuration. Note that this is 27 a deprecated interface; please use vorbis_encode_ctl() with the <a 28 href="ov_ectl_ratemanage2_arg.html">ov_ectl_ratemanage2_arg</a> struct 29 and OV_ECTL_RATEMANAGE2_GET and OV_ECTL_RATEMANAGE2_SET calls in new 30 code. 31 32 <p> 33 34 <table border=0 width=100% color=black cellspacing=0 cellpadding=7> 35 <tr bgcolor=#cccccc> 36 <td> 37 <pre><b>struct ovectl_ratemanage_arg { 38 int management_active; 39 40 long bitrate_hard_min; 41 long bitrate_hard_max; 42 double bitrate_hard_window; 43 44 long bitrate_av_lo; 45 long bitrate_av_hi; 46 double bitrate_av_window; 47 double bitrate_av_window_center; 48 };</b></pre> 49 </td> 50 </tr> 51 </table> 52 53 <h3>Relevant Struct Members</h3> 54 <dl> 55 56 <dt><i>management_active</i></dt> 57 <dd>nonzero if bitrate management is active</dd> 58 59 <dt><i>bitrate_hard_min</i></dt> 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> 61 <dt><i>bitrate_hard_max</i></dt> 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> 63 <dt><i>bitrate_hard_window</i></dt> 64 <dd>the window period (in seconds) used to regulate the hard bitrate minimum and maximum</dd> 65 66 <dt><i>bitrate_av_lo</i></dt> 67 <dd>soft lower limit (in kilobits per second) below which the average bitrate tracker will start nudging the bitrate higher.</dd> 68 <dt><i>bitrate_av_hi</i></dt> 69 <dd>soft upper limit (in kilobits per second) above which the average bitrate tracker will start nudging the bitrate lower.</dd> 70 <dt><i>bitrate_av_window</i></dt> 71 <dd>the window period (in seconds) used to regulate the average bitrate minimum and maximum.</dd> 72 <dt><i>bitrate_av_window_center</i></dt> 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> 74 75 </dl> 76 77 78 <br><br> 79 <hr noshade> 80 <table border=0 width=100%> 81 <tr valign=top> 82 <td><p class=tiny>copyright © 2004 vorbis team</p></td> 83 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a><br><a href="mailto:team (a] vorbis.org">team (a] vorbis.org</a></p></td> 84 </tr><tr> 85 <td><p class=tiny>vorbisfile documentation</p></td> 86 <td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td> 87 </tr> 88 </table> 89 90 </body> 91 92 </html> 93
