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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD><TITLE>Full command line switch reference</TITLE><META NAME="description" CONTENT="Command line switch reference"><META NAME="keywords" CONTENT="lame"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso_8859_1"><LINK REL="STYLESHEET" HREF="lame.css"></HEAD><BODY TEXT=#000000 BGCOLOR=#F9FBFB LINK=#006666 VLINK=#4C4C4C ALINK=#995500><H1>Full command line switch reference</H1><P> <font size="-1">note: Options which could exist without being documented here are considered as experimental ones. Such experimental options should usually not be used.</font> <P> <TABLE CELLPADDING=3 BORDER="1"> <TR VALIGN="TOP"> <TD ALIGN="LEFT" nowrap><b>switch</b></TD> <TD ALIGN="LEFT" nowrap><b>parameter</b></TD> </TR> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#a">-a</a></kbd></td> <td align="LEFT" nowrap>downmix stereo file to mono</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-abr">--abr</a></kbd></td> <td align="LEFT" nowrap>average bitrate encoding</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-allshort">--allshort</a></kbd></td> <td align="LEFT" nowrap>use short blocks only</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-athlower">--athlower</a></kbd></td> <td align="LEFT" nowrap>lower the ATH</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-athonly">--athonly</a></kbd></td> <td align="LEFT" nowrap>ATH only</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-athshort">--athshort</a></kbd></td> <td align="LEFT" nowrap>ATH only for short blocks</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-athtype">--athtype</a></kbd></td> <td align="LEFT" nowrap>select ATH type</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#b">-b</a></kbd></td> <td align="LEFT" nowrap>bitrate (8...320)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#Bmax">-B</a></kbd></td> <td align="LEFT" nowrap>max VBR/ABR bitrate (8...320)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-bitwidth">--bitwidth</a></kbd></td> <td align="LEFT" nowrap>input bit width</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#c">-c</a></kbd></td> <td align="LEFT" nowrap>copyright</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-cbr">--cbr</a></kbd></td> <td align="LEFT" nowrap>enforce use of constant bitrate</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-clipdetect">--clipdetect</a></kbd></td> <td align="LEFT" nowrap>clipping detection</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-comp">--comp</a></kbd></td> <td align="LEFT" nowrap>choose compression ratio</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-cwlimit">--cwlimit</a></kbd></td> <td align="LEFT" nowrap>tonality limit</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#d">-d</a></kbd></td> <td align="LEFT" nowrap>block type control</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-decode">--decode</a></kbd></td> <td align="LEFT" nowrap>decoding only</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-disptime">--disptime</a></kbd></td> <td align="LEFT" nowrap>time between display updates</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#e">-e</a></kbd></td> <td align="LEFT" nowrap>de-emphasis (<b>n</b>, 5, c)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#f">-f</a></kbd></td> <td align="LEFT" nowrap> fast mode</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#FF">-F</a></kbd></td> <td align="LEFT" nowrap> strictly enforce the -b option</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-freeformat">--freeformat</a></kbd></td> <td align="LEFT" nowrap> free format bitstream</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#h">-h</a></kbd></td> <td align="LEFT" nowrap>high quality</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-help">--help</a></kbd></td> <td align="LEFT" nowrap> help</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-highpass">--highpass</a></kbd></td> <td align="LEFT" nowrap> highpass filtering frequency in kHz</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-highpass">--highpass-width</a></kbd></td> <td align="LEFT" nowrap> width of highpass filtering in kHz</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#k">-k</a></kbd></td> <td align="LEFT" nowrap> full bandwidth</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-lowpass">--lowpass</a></kbd></td> <td align="LEFT" nowrap> lowpass filtering frequency in kHz</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-lowpass-width">--lowpass-width</a></kbd></td> <td align="LEFT" nowrap> width of lowpass filtering in kHz</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#m">-m</a></kbd></td> <td align="LEFT" nowrap>stereo mode (s, <b>j</b>, f, m)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-mp1input">--mp1input</a></kbd></td> <td align="LEFT" nowrap>MPEG Layer I input file</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-mp2input">--mp2input</a></kbd></td> <td align="LEFT" nowrap>MPEG Layer II input file</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-mp3input">--mp3input</a></kbd></td> <td align="LEFT" nowrap>MPEG Layer III input file</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-noath">--noath</a></kbd></td> <td align="LEFT" nowrap>disable ATH</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-noasm">--noasm</a></kbd></td> <td align="LEFT" nowrap>disable assembly optimizations (mmx/3dnow/sse)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-nohist">--nohist</a></kbd></td> <td align="LEFT" nowrap>disable histogram display</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-noreplaygain">--noreplaygain</a></kbd></td> <td align="LEFT" nowrap>disable ReplayGain analysis</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-nores">--nores</a></kbd></td> <td align="LEFT" nowrap>disable bit reservoir</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-noshort">--noshort</a></kbd></td> <td align="LEFT" nowrap>disable short blocks frames</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-notemp">--notemp</a></kbd></td> <td align="LEFT" nowrap>disable temporal masking</td> </tr> <TR VALIGN="TOP"> <TD ALIGN="LEFT" nowrap><kbd><a href="#o">-o</a></kbd></TD> <TD ALIGN="LEFT" nowrap>non-original</TD> </TR> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#p">-p</a></kbd></td> <td align="LEFT" nowrap>error protection</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-preset">--preset</a></kbd></td> <td align="LEFT" nowrap>use built-in preset</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-priority">--priority</a></kbd></td> <td align="LEFT" nowrap>OS/2 process priority control</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#q">-q</a></kbd></td> <td align="LEFT" nowrap>algorithm quality selection</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-silent">--quiet</a></kbd></td> <td align="LEFT" nowrap>silent operation</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#r">-r</a></kbd></td> <td align="LEFT" nowrap>input file is raw PCM</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-replaygain-accurate">--replaygain-accurate</a></kbd></td> <td align="LEFT" nowrap>compute ReplayGain more accurately and find the peak sample</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-replaygain-fast">--replaygain-fast</a></kbd></td> <td align="LEFT" nowrap>compute ReplayGain fast but slightly inaccurately (default)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-resample">--resample</a></kbd></td> <td align="LEFT" nowrap>output sampling frequency in kHz (encoding only)</td> </tr> <TR VALIGN="TOP"> <TD ALIGN="LEFT" nowrap><kbd><a href="#s">-s</a></kbd></TD> <TD ALIGN="LEFT" nowrap>sampling frequency in kHz</TD> </TR> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-silent">-S</a></kbd></td> <td align="LEFT" nowrap>silent operation</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-scale">--scale</a></kbd></td> <td align="LEFT" nowrap>scale input</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-scale-l">--scale-l</a></kbd></td> <td align="LEFT" nowrap>scale input channel 0 (left)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-scale-r">--scale-r</a></kbd></td> <td align="LEFT" nowrap>scale input channel 1 (right)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-short">--short</a></kbd></td> <td align="LEFT" nowrap>use short blocks</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-silent">--silent</a></kbd></td> <td align="LEFT" nowrap>silent operation</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-strictly-enforce-ISO">--strictly-enforce-ISO</a></kbd></td> <td align="LEFT" nowrap>strict ISO compliance</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#t">-t</a></kbd></td> <td align="LEFT" nowrap>disable INFO/WAV header</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#V">-V</a></kbd></td> <td align="LEFT" nowrap>VBR quality setting (0...9)</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-vbr-new">--vbr-new</a></kbd></td> <td align="LEFT" nowrap>new VBR mode</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-vbr-old">--vbr-old</a></kbd></td> <td align="LEFT" nowrap>older VBR mode</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#-verbose">--verbose</a></kbd></td> <td align="LEFT" nowrap>verbosity</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#x">-x</a></kbd></td> <td align="LEFT" nowrap>swapbytes</td> </tr> <tr valign="TOP"> <td align="LEFT" nowrap><kbd><a href="#Xquant">-X</a></kbd></td> <td align="LEFT" nowrap>change quality measure</td> </tr></TABLE><BR><dl> <dt><strong>* <kbd>-a</kbd><a name="a"> downmix </a></strong> <dd>Mix the stereo input file to mono and encode as mono.<br> The downmix is calculated as the sum of the left and right channel, attenuated by 6 dB. <br> <br> This option is only needed in the case of raw PCM stereo input (because LAME cannot determine the number of channels in the input file).<br> To encode a stereo PCM input file as mono, use "lame -m s -a".<br> <br> For WAV and AIFF input files, using "-m m" will always produce a mono .mp3 file from both mono and stereo input. <dt><br> </dt> <hr width="50%" noshade align="center"> <br></dl><dl> <dt><strong>* <kbd>--abr n</kbd><a name="-abr"> average bitrate encoding</a></strong> </dt></dl><dl> <dd>Turns on encoding with a targeted average bitrate of n kbits, allowing to use frames of different sizes. The allowed range of n is 8-310, you can use any integer value within that range.<br> <br> It can be combined with the -b and -B switches like:<br> lame --abr 123 -b 64 -B 192 a.wav a.mp3<br> which would limit the allowed frame sizes between 64 and 192 kbits. <br> <br> </dt> <hr width="50%" noshade align="center"> <br></dl><dl> <dt><strong>* <kbd>--allshort</kbd><a name="-allshort"> use short blocks only</a></strong> </dt></dl><dl> <dd>Use only short blocks, no long ones. </dl><dl> <dd> <dt><br> </dt> <hr width="50%" noshade align="center"> <br></dl><dl> <dt><strong>* <kbd>--athlower n</kbd><a name="-athlower"> lower ⌨️ 快捷键说明
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