DOCS/zh/sound.html

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  11
  12
  13 <H3><A NAME="audio">2.3.2 ÒôÆµÊä³öÉè±¸</A></H3>
  14
  15 <H4><A NAME="sync">2.3.2.1 ÒôÆµ/ÊÓÆµÍ¬²½</A></H4>
  16
  17 <P>MPlayerµÄÒôÆµ½Ó¿Ú³ÆÎª<I>libao2</I>¡£ËüÄ¿Ç°°üº¬ÕâÐ©Çý¶¯£º</P>
  18
  19 <DL>
  20   <DT>oss</DT>
  21   <DD>OSS(ioctl)Çý¶¯(Ö§³ÖÓ²¼þAC3Êä³ö)</DD>
  22
  23   <DT>sdl</DT>
  24   <DD>SDLÇý¶¯(Ö§³Ö<B>ESD</B>£¬<B>ARTS</B>Ö®ÀàµÄÒôÆµÊØ»¤½ø³Ì)</DD>
  25
  26   <DT>nas</DT>
  27   <DD>NAS(Network Audio System)Çý¶¯</DD>
  28
  29   <DT>alsa5</DT>
  30   <DD>±¾µØµÄALSA 0.5Çý¶¯</DD>
  31
  32   <DT>alsa9</DT>
  33   <DD>±¾µØµÄALSA 0.9Çý¶¯(Ö§³ÖÓ²¼þAC3Êä³ö)</DD>
  34
  35   <DT>sun</DT>
  36   <DD>BSDºÍSolaris8ÓÃ»§µÄSUNÒôÆµÇý¶¯(<CODE>/dev/audio</CODE>)</DD>
  37
  38   <DT>arts</DT>
  39   <DD>±¾µØµÄARTSÇý¶¯(Ö÷ÒªÕë¶ÔKDEÓÃ»§)</DD>
  40
  41   <DT>esd</DT>
  42   <DD>±¾µØµÄESDÇý¶¯(Ö÷ÒªÕë¶ÔGNOMEÓÃ»§)</DD>
  43 </DL>
  44
  45 <P>LinuxÏÂµÄÉù¿¨Çý¶¯ÓÐ¼æÈÝÎÊÌâ¡£ÕâÊÇÒòÎªMPlayerÊ¹ÓÃÒ»¸ö<EM>ÕýÈ·</EM>±àÂëµÄÉù¿¨Çý¶¯ÄÚ½¨µÄÌØÐÔÀ´ÊµÏÖÒôÆµ/ÊÓÆµÍ¬²½¡£ÒÅº¶µÄÊÇÓÐÐ©Çý¶¯µÄ×÷Õß
  46 ²»ÔÚºõÕâ¸ö¹¦ÄÜ£¬ËüÔÚ²¥·ÅMP3ºÍÊµÏÖÉùÒôÐ§¹ûÊ±²¢²»ÐèÒª¡£</P>
  47
  48 <P>±ðµÄÃ½Ìå²¥·ÅÆ÷±ÈÈç<A HREF="http://avifile.sourceforge.net">aviplay</A>»òÕß<A
  49 HREF="http://xine.sourceforge.net">xine</A>¿ÉÄÜÔÚÕâÐ©Çý¶¯ÉÏ¹¤×÷Ã»ÓÐÎÊÌâÒòÎªËûÃÇÊ¹ÓÃÄÚ²¿¼ÆÊ±Æ÷µÄ¡°¼òµ¥¡±·½·¨¡£
  50 ²âÊÔ±íÃ÷ËûÃÇµÄ·½·¨Ã»ÓÐMPlayerµÄ·½·¨ÓÐÐ§ÂÊ¡£</P>
  51
  52 <P>Ê¹ÓÃÒ»¸öÕýÈ·±àÖÆµÄÒôÆµÇý¶¯µÄÊ±ºòMPlayer½«ÓÀÔ¶²»»á²úÉúÒôÆµÏà¹ØµÄA/V²»Í¬²½£¬³ý·ÇÄãµÄÎÄ¼þÖÆ×÷µÄÏàµ±Ôã¸â¡£(man pageÀïÃæÓÐ½â¾öµÄ°ì·¨)¡£</P>
  53
  54 <P>Èç¹ûÄãÅöÇÉÓöµ½Ò»¸ö²»ºÃµÄÒôÆµÇý¶¯£¬³¢ÊÔÊ¹ÓÃ<CODE>-autosync</CODE>Ñ¡Ïî£¬ËüÓ¦¸Ã¿ÉÒÔ½â¾öÄãµÄÎÊÌâ¡£ÏêÏ¸µÄÐÅÏ¢²Î¼ûman page¡£</P>
  55
  56 <P>Ò»Ð©ÌáÊ¾£º</P>
  57
  58 <UL>
  59   <LI>Èç¹ûÄãÓÐOSSÇý¶¯£¬ÏÈ³¢ÊÔ<CODE>-ao oss</CODE>(ÕâÊÇÄ¬ÈÏµÄ)¡£Èç¹ûÄãÓöµ½Ã«´Ì£¬Í£Ö¹»òÕßÈÎºÎ²»Õý³£µÄÊÂÇé£¬
  60 ³¢ÊÔ<CODE>-ao sdl</CODE>(×¢Òâ£ºÄãÐèÒª°²×°SDL¿âºÍÍ·ÎÄ¼þ)¡£Ðí¶àÇé¿öÏÂSDLµÄÒôÆµÇý¶¯¶¼»áÓÐ°ïÖú£¬Ò²Ö§³ÖESD(GNOME)£¬ARTS(KDE)¡£</LI>
  61   <LI>Èç¹ûÄãÊ¹ÓÃALSA 0.5µÄ°æ±¾£¬ÄÇÃ´Äã¼¸ºõ×ÜÊÇ²»µÃ²»Ê¹ÓÃ<CODE>-ao alsa5</CODE>£¬ÒòÎªALSA 0.5µÄOSS·ÂÕæºÜbuggy£¬
  62 »áµ¼ÖÂ<B>MPlayer±ÀÀ£</B>²¢³öÏÖÕâÑùµÄÐÅÏ¢£º<BR>
  63     <CODE>DEMUXER: Too many (945 in 8390980 bytes) video packets in the buffer!</CODE></LI>
  64   <LI>ÔÚSolarisÉÏ£¬ÓÃ<CODE>-ao sun</CODE>Ñ¡ÏîÑ¡ÔñÊ¹ÓÃSUNµÄÒôÆµÇý¶¯£¬·ñÔòÊÓÆµÒôÆµ¶¼ÎÞ·¨¹¤×÷¡£</LI>
  65   <LI>Èç¹û´ÓCD-ROMÉÏ²¥·ÅÊ±ÉùÒôÌøÔ¾£¬´ò¿ªIRQ unmasking£¬Ò²¾ÍÊÇÊ¹ÓÃÃüÁî<CODE>hdparm -u1 /dev/cdrom</CODE>(<CODE>man hdparm</CODE>)¡£Õâ
  66 Ò»°ãÀ´ËµÊ±ÓÐÒæµÄ£¬½øÒ»²½µÄÃèÊöÔÚ<A HREF="cd-dvd.html#drives">CD-ROM²¿·Ö</A>¡£</LI>
  67 </UL>
  68
  69
  70 <H4><A NAME="experiences">2.3.2.2 Éù¿¨ÌåÑé£¬ÍÆ¼ö</A></H4>
  71
  72 <P>LinuxÏÂµÄÉù¿¨Çý¶¯Ö÷ÒªÊÇ×ÔÓÉ°æ±¾µÄOSS¡£ÕâÐ©Çý¶¯ÔÚ2.5µÄ¿ª·¢Ê÷ÖÐÒÑ¾±»<A HREF="http://www.alsa-project.org">ALSA</A>(Advanced
  73   Linux Sound Architecture)È¡´ú£¬Èç¹ûÄãµÄ·¢ÐÐ°æÖÐ»¹Ã»ÓÐÊ¹ÓÃALSA£¬¶øÄãµÄÉù¿¨ÓÖÓÐÎÊÌâÄã¿ÉÄÜÓ¦¸ÃÊÔÊÔ¡£ALSAµÄÇý¶¯Ò»°ãÀ´Ëµ£¬ÔÚ
  74 ¼æÈÝÐÔ£¬±íÏÖºÍÌØÐÔ·½Ãæ¶¼±ÈOSSÒªºÃ£¬µ«Ò²ÓÐÐ©Éù¿¨Ö»ÓÐ<A HREF="http://www.opensound.com/">4Front Technologies</A>µÄÉÌÒµ°æ±¾µÄ
  75 OSSÇý¶¯²ÅÖ§³Ö£¬ËûÃÇÒ²Ö§³ÖÒ»Ð©·ÇLinuxÏµÍ³¡£</P>
  76
  77 <TABLE BORDER="1" WIDTH="100%">
  78
  79   <TR>
  80     <TH ROWSPAN="2"><B>Éù¿¨</B></TH>
  81     <TH COLSPAN="4"><B>Çý¶¯</B></TH>
  82     <TH ROWSPAN="2"><B>×î´ókHz</B></TH>
  83     <TH ROWSPAN="2"><B>×î´óÉùµÀÊý</B></TH>
  84     <TH ROWSPAN="2"><B>×î´ó´ò¿ªÊý<FONT SIZE="-2"><A HREF=#note1>[1]</A></FONT></B></TH>
  85   </TR>
  86
  87   <TR>
  88     <TH><B>OSS/Free</B></TH>
  89     <TH><B>ALSA</B></TH>
  90     <TH><B>OSS/Pro</B></TH>
  91     <TH><B>ÆäËû</B></TH>
  92   </TR>
  93
  94   <TR>
  95     <TD><B>VIA°åÔØÐ¾Æ¬(via82cxxx)Ö»ÄÜ48kHz</B></TD>
  96         <TD><A HREF="http://sourceforge.net/project/showfiles.php?group_id=3242&amp;release_id=59602">via82cxxx_audio</A></TD>
  97         <TD>snd-via82xx</TD>
  98     <TD>&nbsp;</TD>
  99     <TD>&nbsp;</TD>
 100     <TD>4-48 kHz»òÕßÖ»ÄÜÊ¹ÓÃ48 kHz£¬È¡¾öÓÚÐ¾Æ¬</TD>
 101     <TD>&nbsp;</TD>
 102     <TD>&nbsp;</TD>
 103   </TR>
 104
 105   <TR>
 106     <TD><B>Aureal Vortex 2</B></TD>
 107     <TD>Ã»ÓÐ</TD>
 108         <TD>Ã»ÓÐ</TD>
 109         <TD>OK</TD>
 110         <TD><A HREF="http://aureal.sourceforge.net">Linux Aureal Drivers</A><BR>
 111         <A HREF="http://makacs.poliod.hu/~pontscho/aureal/au88xx-1.1.3.tar.bz2">»º³å´óÐ¡Ôö¼Óµ½32k</A></TD>
 112         <TD>48</TD>
 113         <TD>4.1</TD>
 114         <TD>5+</TD>
 115   </TR>
 116
 117   <TR>
 118     <TD><B>SB Live!</B></TD>
 119     <TD>Ä£Äâ·½Ê½OK£¬SPÓëDIF²»ÄÜ¹¤×÷</TD>
 120     <TD>¶¼OK</TD>
 121         <TD>¶¼OK</TD>
 122         <TD><A HREF="http://opensource.creative.com">CreativeµÄOSSÇý¶¯(Ö§³ÖSP/DIF)</A></TD>
 123     <TD>192</TD>
 124         <TD>4.0/5.1</TD>
 125     <TD>32</TD>
 126   </TR>
 127
 128   <TR>
 129     <TD><B>SB 128 PCI(es1371)</B></TD>
 130     <TD>OK</TD>
 131     <TD>?</TD>
 132     <TD>&nbsp;</TD>
 133     <TD>&nbsp;</TD>
 134     <TD>48</TD>
 135     <TD>Á¢ÌåÉù</TD>
 136     <TD>2</TD>
 137   </TR>
 138
 139   <TR>
 140     <TD><B>SB AWE 64</B></TD>
 141     <TD>×î´ó44kHz</TD>
 142     <TD>48kHzÌýÆðÀ´ºÜÔã</TD>
 143     <TD>&nbsp;</TD>
 144     <TD>&nbsp;</TD>
 145     <TD>48</TD>
 146     <TD>&nbsp;</TD>
 147     <TD>&nbsp;</TD>
 148   </TR>
 149
 150   <TR>
 151     <TD><B>GUS PnP</B></TD>
 152     <TD>Ã»ÓÐ</TD>
 153     <TD>OK</TD>
 154     <TD>OK</TD>
 155     <TD>&nbsp;</TD>
 156     <TD>48</TD>
 157     <TD>&nbsp;</TD>
 158     <TD>&nbsp;</TD>
 159   </TR>
 160
 161   <TR>
 162     <TD><B>Gravis UltraSound ACE</B></TD>
 163     <TD>²»OK</TD>
 164     <TD>OK</TD>
 165     <TD>&nbsp;</TD>
 166     <TD>&nbsp;</TD>
 167     <TD>44</TD>
 168     <TD>&nbsp;</TD>
 169     <TD>&nbsp;</TD>
 170   </TR>
 171
 172   <TR>
 173     <TD><B>Gravis UltraSound MAX</B></TD>
 174     <TD>OK</TD>
 175     <TD>OK (?)</TD>
 176     <TD>&nbsp;</TD>
 177     <TD>&nbsp;</TD>
 178     <TD>48</TD>
 179     <TD>&nbsp;</TD>
 180     <TD>&nbsp;</TD>
 181   </TR>
 182
 183   <TR>
 184     <TD><B>ESS 688</B></TD>
 185     <TD>OK</TD>
 186     <TD>OK(?)</TD>
 187     <TD>&nbsp;</TD>
 188     <TD>&nbsp;</TD>
 189     <TD>48</TD>
 190     <TD>&nbsp;</TD>
 191     <TD>&nbsp;</TD>
 192   </TR>
 193
 194   <TR>
 195     <TD><B>C-MediaÉù¿¨(ÄÄÒ»ÖÖ£¿)</B></TD>
 196     <TD>²»OK(ÓÐßÐßÐÉù)(?)</TD>
 197     <TD>OK</TD>
 198     <TD>&nbsp;</TD>
 199     <TD>&nbsp;</TD>
 200     <TD>?</TD>
 201     <TD>&nbsp;</TD>
 202     <TD>&nbsp;</TD>
 203   </TR>
 204
 205   <TR>
 206     <TD><B>YamahaÉù¿¨(*ymf*)</B></TD>
 207     <TD>²»OK(?)(¿ÉÄÜÓ¦¸ÃÓÃ<CODE>-ao sdl</CODE>)</TD>
 208     <TD>Ö»ÓÐÊ¹ÓÃALSA 0.5µÄOSSÄ£Äâ<B>²¢Ê¹ÓÃ</B><CODE>-ao sdl</CODE>(!)(?)Ê±OK</TD>
 209     <TD>&nbsp;</TD>
 210     <TD>&nbsp;</TD>
 211     <TD>?</TD>
 212     <TD>&nbsp;</TD>
 213     <TD>&nbsp;</TD>
 214   </TR>
 215
 216   <TR>
 217     <TD><B>Ê¹ÓÃenvy24Ð¾Æ¬µÄÉù¿¨(±ÈÈçTerratec EWS88MT)</B></TD>
 218     <TD>?</TD>
 219     <TD>?</TD>
 220     <TD>OK</TD>
 221     <TD>&nbsp;</TD>
 222     <TD>?</TD>
 223     <TD>&nbsp;</TD>
 224     <TD>&nbsp;</TD>
 225   </TR>
 226
 227   <TR>
 228     <TD><B>PCÑïÉùÆ÷»òÕßDAC</B></TD>
 229     <TD>OK</TD>
 230     <TD>none</TD>
 231     <TD>&nbsp;</TD>
 232     <TD><A HREF="http://www.geocities.com/stssppnn/pcsp.html">Linux PCÑïÉùÆ÷µÄOSSÇý¶¯</a></TD>
 233     <TD>Çý¶¯¿ÉÒÔÄ£Äâµ½44.1£¬¿ÉÄÜ¸ü¸ß¡£</TD>
 234     <TD>µ¥ÉùµÀ</TD>
 235     <TD>1</TD>
 236   </TR>
 237
 238 </TABLE>
 239
 240 <P><A NAME="note1"><B>[1]</B></A>£º¿ÉÒÔ<I>Í¬Ê±</B>Ê¹ÓÃÕâ¸öÉè±¸µÄ³ÌÐò¸öÊý¡£</P>
 241
 242 <P>¶ÔÕâ¸öÎÄ¼þµÄ·´À¡ÊÇÊÜ»¶ÓµÄ¡£Çë¸æËßÎÒÃÇÄãµÄÉù¿¨ÊÇÈçºÎÓëMPlayer¹²Í¬¹¤×÷µÄ¡£</P>
 243
 244 <H4><A NAME="af">2.3.2.3 Audio filters</A></H4>
 245
 246 <P>ÀÏµÄÒôÆµ²å¼þ±»ÐÂµÄÒôÆµÂË¾µ²ãÈ¡´úÁË¡£ÒôÆµÂË¾µÓÃÀ´ÔÚÉùÒôµ½´ïÉù¿¨Ö®Ç°¸Ä±äÉùÒôÊý¾ÝµÄÊôÐÔ¡£¼¤»îºÍ¹Ø±ÕÂË¾µÍ¨³£ÊÇ×Ô¶¯µÄµ«Ò²¿ÉÒÔÇ¿ÖÆ¡£
 247 µ±ÒôÆµÊý¾ÝµÄÊôÐÔÓëÉù¿¨ÒªÇóµÄ²»Í¬Ê±¾Í»á¼¤»îÂË¾µ£¬²»ÐèÒªÊ±¾Í»á¹Ø±Õ¡£<CODE>-af filter1,filter2,...</CODE>Ñ¡ÏîÓÃÀ´È¡´úÂË¾µµÄÄ¬ÈÏÐÐÎª
 248 »òÕß²åÈë²»ÄÜ×Ô¶¯²åÈëµÄÂË¾µ¡£ÂË¾µ½«°´ÕÕËüÃÇÔÚ¶ººÅ·Ö¸ôµÄÁÐ±íÖÐ³öÏÖµÄË³ÐòÔËÐÐ¡£</P>
 249
 250 <P>ÀýÈç:<BR>
 251   &nbsp;&nbsp;<CODE>mplayer -af resample,pan movie.avi </CODE></P>
 252
 253 <P>ÉùÒô½«ÏÈÍ¨¹ýresampleÂË¾µÈ»ºóÍ¨¹ýpanÂË¾µ¡£×¢ÒâÁÐ±íÖÐ²»ÄÜ°üº¬ÈÎºÎ¿Õ¸ñ£¬·ñÔòËü½«»áÊ§°Ü¡£</P>
 254
 255 <P>ÂË¾µÍ¨³£ÓÐÑ¡ÏîÓÃÀ´¸Ä±äËûÃÇµÄÐÐÎª¡£ÕâÐ©Ñ¡ÏîÔÚÏÂÃæµÄÕÂ½Ú»áÏêÏ¸µÄ½âÊÍ¡£µ±Ñ¡Ïî±»Ê¡ÂÔÊÇÂË¾µ½«Ö´ÐÐÄ¬ÈÏµÄÉèÖÃ¡£ÕâÀïÊÇÒ»¸ö
 256 Ê¹ÓÃ´øÏàÓ¦Ñ¡ÏîµÄÂË¾µµÄÀý×Ó£º</P>
 257
 258 <P>&nbsp;&nbsp;<CODE>mplayer -af resample=11025,pan=1:0.5:0.5 -channels 1
 259   -srate 11025 media.avi</CODE></P>
 260
 261 <P>½«resampleÂË¾µµÄÊä³öÆµÂÊÉèÖÃÎª11025Hz²¢Ê¹ÓÃpanÂË¾µ°ÑÒôÆµ»ìºÏµ½Ò»¸öÉùµÀ¡£</P>
 262
 263 <P>Õâ¸öÂË¾µ²ãµÄÔËÐÐÓÉ<CODE>-af-adv</CODE>Ñ¡Ïî¿ØÖÆ¡£Õâ¸öÑ¡ÏîÓÐÁ½¸ö×ÓÑ¡Ïî£º</P>
 264
 265 <DL>
 266   <DT><CODE>force</CODE><DT>
 267   <DD>ÊÇÒ»¸ö±ÈÌØÓòÓÃÀ´¿ØÖÆÂË¾µÈçºÎ²åÈëÒÔ¼°ËüÃÇÊ¹ÓÃÔõÑùµÄËÙ¶È/¾«È·¶ÈÓÅ»¯£º
 268     <DL>
 269       <DT><CODE>0</CODE></DT>
 270       <DD>Ê¹ÓÃÂË¾µµÄ×Ô¶¯²åÈë²¢¸ù¾ÝCPUµÄËÙ¶ÈÓÅ»¯¡£</DD>
 271       <DT><CODE>1</CODE></DT>
 272       <DD>Ê¹ÓÃÂË¾µµÄ×Ô¶¯²åÈë²¢Îª×î¸ßËÙ¶ÈÓÅ»¯¡£<BR>
 273         <EM>¾¯¸æ£º</EM>ÒôÆµ²å¼þµÄÓÐÐ©ÌØÐÔ½«»áÊ§Ð§£¬ÉùÒôÖÊÁ¿½«»áÏÂ½µ¡£</DD>
 274       <DT><CODE>2</CODE></DT>
 275       <DD>Ê¹ÓÃ×Ô¶¯²åÈë²¢ÎªÖÊÁ¿ÓÅ»¯¡£</DD>
 276       <DT><CODE>3</CODE></DT>
 277       <DD>²»Ê¹ÓÃ×Ô¶¯²åÈëÒ²²»½øÐÐÓÅ»¯¡£<BR>
 278         <I>¾¯¸æ£º</I>Õâ¸öÉèÖÃ¿ÉÄÜ»áµ¼ÖÂMPlayer±ÀÀ£¡£</DD>
 279       <DT><CODE>4</CODE></DT>
 280       <DD>°´ÕÕÉÏÃæ0Ñ¡Ïî×Ô¶¯²åÈëÂË¾µ£¬µ«¾¡¿ÉÄÜµÄÊ¹ÓÃ¸¡µã´¦Àí¡£</DD>
 281       <DT><CODE>5</CODE></DT>
 282       <DD>°´ÕÕÉÏÃæ1Ñ¡Ïî×Ô¶¯²åÈëÂË¾µ£¬µ«¾¡¿ÉÄÜµÄÊ¹ÓÃ¸¡µã´¦Àí¡£</DD>
 283       <DT><CODE>6</CODE></DT>
 284       <DD>°´ÕÕÉÏÃæ2Ñ¡Ïî×Ô¶¯²åÈëÂË¾µ£¬µ«¾¡¿ÉÄÜµÄÊ¹ÓÃ¸¡µã´¦Àí¡£</DD>
 285       <DT><CODE>7</CODE></DT>
 286       <DD>°´ÕÕÉÏÃæ3Ñ¡Ïî×Ô¶¯²åÈëÂË¾µ£¬µ«¾¡¿ÉÄÜµÄÊ¹ÓÃ¸¡µã´¦Àí¡£</DD>
 287     </DL>
 288   </DD>
 289
 290   <DT><CODE>list</CODE></DT>
 291   <DD>ÊÇ-afÑ¡ÏîµÄ±ðÃû¡£</DD>
 292 </DL>
 293
 294 <P>ÂË¾µ²ãÍ¬Ñù»áÓ°ÏìÏÂÃæµÄÒ»°ãÑ¡Ïî£º
 295
 296 <DL>
 297   <DT><CODE>-v</CODE></DT>
 298   <DD>Ôö¼ÓÈßÓà¼¶±ðÊ¹´ó²¿·ÖÂË¾µÏÔÊ¾´¦¸½¼ÓµÄ×´Ì¬ÐÅÏ¢¡£</DD>
 299   <DT><CODE>-channels</CODE></DT>
 300   <DD>Õâ¸öÑ¡ÏîÉèÖÃÄãÏëÈÃÄãµÄÉù¿¨Ê¹ÓÃµÄÊä³öÉùµÀÊý¡£ËüÍ¬Ñù»áÓ°Ïì´ÓÃ½Ìå½âÂë´¦µÄÉùµÀÊý¡£Èç¹ûÃ½Ìå°üº¬µÄÉùµÀÊýÉÙÓÚÒªÇóµÄÉùµÀÊý
 301 channels²å¼þ(¼ûÏÂÃæ)½«×Ô¶¯²åÈë¡£¶¨Ïò½«Ê¹ÓÃchannelsÂË¾µµÄÄ¬ÈÏ¶¨Ïò¡£</DD>
 302   <DT><CODE>-srate</CODE></DT>
 303   <DD>Õâ¸öÑ¡ÏîÑ¡ÔñÄãÏëÈÃÄãµÄÉù¿¨Ê¹ÓÃµÄ²ÉÑùÂÊ£¬Èç¹ûÄãµÄÉù¿¨µÄ²ÉÑùÂÊÓëµ±Ç°Ã½Ìå²»Í¬£¬resample²å¼þ(¼ûÏÂÃæ)½«²åÈëµ½ÒôÆµÂË¾µ²ãÖÐ
 304 À´²¹³¥Õâ¸ö²î±ð¡£</DD>
 305   <DT><CODE>-format</CODE><DT>
 306   <DD>Õâ¸öÑ¡ÏîÉèÖÃÉù¿¨ºÍÒôÆµÂË¾µ²ãÖ®¼äÊ¹ÓÃµÄ²ÉÑù¸ñÊ½£¬Èç¹ûÄãµÄÉù¿¨ÒªÇóµÄ²ÉÑù¸ñÊ½Óòµ±Ç°Ã½Ìå²»Í¬£¬Ò»¸öformatÂË¾µ(¼ûÏÂÃæ)½«×Ô¶¯²åÈë
 307 À´½øÐÐµ÷Õû¡£</DD>
 308 </DL>
 309
 310
 311 <H4><A NAME="af_resample">2.3.2.3.1 Éý/½µ²ÉÑùÂÊ</A></H4>
 312
 313 <P>MPlayerÍêÈ«Ö§³ÖÊ¹ÓÃ<CODE>resample</CODE>²å¼þ½øÐÐÉùÒôµÄÉý/½µ²ÉÑùÂÊ¡£µ±ÄãÊ¹ÓÃ¹Ì¶¨²ÉÑùÂÊµÄÉù¿¨»òÕß±»Ö»¼æÈÝ
 314 ×î´ó44.1kHzµÄÀÏÉù¿¨ÓôÃÆÊ±¿ÉÒÔÊ¹ÓÃËü¡£Õâ¸öÂË¾µ»áÔÚÐèÒªÊ±×Ô¶¯¿ªÆô£¬µ«ËüÒ²¿ÉÒÔÓÃÃüÁîÐÐÏÔÊ½µÄ¿ªÆô¡£ËûÓÐÈý¸öÑ¡Ïî£º</P>
 315
 316 <DL>
 317   <DT><CODE>srate &lt;8000-192000&gt;</CODE></DT>
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