139 lines
5.4 KiB
HTML
139 lines
5.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta name="generator" content="PSPad editor, www.pspad.com" />
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<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
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<link rel="stylesheet" type="text/css" href="styles/lame.css" />
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<title>Usage of the commandline encoder</title>
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</head>
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<body>
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<div id="menu">
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<ul>
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<li><a href="index.html">Index page</a></li>
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<li><a href="about.html">About LAME</a></li>
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<li><a href="introduction.html">Intro to encoding</a></li>
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<li><a style="border: 0" href="usage.html">Usage of LAME</a>
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<div id="submenu">
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<ul>
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<li><a href="usage.html">Common switches</a></li>
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<li><a style="border: 0" href="detailed.html">Detailed Settings</a></li>
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</ul>
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</div>
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</li>
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<li><a href="history.html">Version history</a></li>
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<li><a href="contributors.html">Coders of LAME</a></li>
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<li><a href="contact.html">Contact LAME</a></li>
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<li><a style="border: 0" href="links.html">LAME links</a></li>
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</ul>
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</div>
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<div id="container">
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<div id="content">
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<div align="center">
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<img src="images/logo.gif" width="358" height="231" alt="LAME Official Logo" />
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<h2 class="hilight">Common and recommended switches</h2>
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</div>
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<h3>Common settings</h3>
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<pre>
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% lame <span class="hilight">[options]</span> inputfile [outputfile]
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</pre>
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<ul>
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<li><strong>Constant Bitrate</strong>: <span class="hilight">-b number</span> or
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<span class="hilight">--preset cbr number</span> Valid values
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for the -b settings depend on the sampling rate<a href="#note1"><sup>1</sup></a>.
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<pre>lame -b 128 sample.wav sample.mp3</pre>
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</li>
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<li><strong>Variable Bitrate (<a href="abr.html">ABR</a> mode)</strong>:
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<span class="hilight">--abr number</span> or <span class="hilight">--preset number</span>
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Valid values for the --abr setting range from 8 to 320.
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<pre>lame --abr 128 sample.wav sample.mp3</pre>
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</li>
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<li><strong>Variable Bitrate (<a href="vbr.html">VBR</a> mode)</strong>:
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<span class="hilight">-V number</span> Valid values
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are from 0 to 9, with decimal values possible, where 0 is the highest quality
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while 9.999 is the lowest one.
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<pre>lame -V2 sample.wav sample.mp3</pre>
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</li>
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</ul>
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<h3>Hydrogenaudio recommended settings</h3>
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<ul>
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<li>
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<strong>Best quality</strong>, "archiving"<a href="#note2"><sup>2</sup></a> :
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<span class="hilight">-b 320</span>
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<p>CBR 320 is the strongest setting for MP3, with
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the lowest risk of artifacts. With the exception of a few situations, quality is
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rarely better than the highest VBR profiles described below.
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</p>
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</li>
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<li><strong>High quality</strong>, HiFi, home or quiet listening :
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<span class="hilight">-V0</span> (avg. 245 kbps) or <span class="hilight">-V1</span>
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(avg. 225 kbps) or <span class="hilight">-V2</span> (avg. 190 kbps) or <span class="hilight">
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-V3</span> (avg. 175 kbps).
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<p>These settings are considered to produce
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transparent encoding (transparent = most people can't distinguish the MP3 from
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the original in an ABX blind test). Audible differences between these presets
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exist, but are rare.
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</p>
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</li>
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<li><strong>Portable</strong>, background noise and low bitrate requirement, small sizes :
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<span class="hilight">-V4</span> (avg. 160 kbps) or <span class="hilight">-V5</span>
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(avg. 130 kbps) or <span class="hilight"> -V6</span> (avg. 115 kbps)
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<p>
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-V6 produces an "acceptable" quality, while -V4 should be close to perceptual transparency.
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</p>
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</li>
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<li><strong>Very low bitrate, small sizes</strong>, eg. for voice, radio, mono encoding :
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<span class="hilight">--abr 80</span> (stereo) or <span class="hilight">--abr 56 -m m</span> (mono)
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<p>
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For very low bitrates, up to 100kbps, ABR is most often the best solution.
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</p>
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</li>
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</ul>
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<div id="notes">
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<ol>
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<li><a name="note1"></a>
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<table cellpadding="5">
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<tr><th>Codec</th>
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<th>sample frequencies (kHz)</th>
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<th>bitrates (kbps)</th></tr>
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<tr><td>MPEG-1 layer III </td> <td>32, 44.1, 48</td>
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<td>32 40 48 56 64 80 96 112 128 160 192 224 256 320</td></tr>
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<tr><td>MPEG-2 layer III</td><td> 16, 22.05, 24</td>
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<td> 8 16 24 32 40 48 56 64 80 96 112 128 144 160</td></tr>
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<tr><td style="border-bottom:0px;">MPEG-2.5 layer III</td><td style="border-bottom:0px;"> 8, 11.025, 12</td>
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<td style="border-bottom:0px;">8 16 24 32 40 48 56 64</td></tr>
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</table>
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</li>
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<li><a name="note2"></a>Lossy codecs, like MP3, should not be used for archiving,
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since the nature of lossy encoding always changes the original sound, even if it
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sounds transparent. Use lossless codecs for this purpose.
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</li>
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</ol>
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</div>
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</div>
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<div id="footer">
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<a href="http://sourceforge.net/projects/lame"><img src="http://sflogo.sourceforge.net/sflogo.php?group_id=290&type=12"
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alt="Get LAME (Lame Aint an MP3 Encoder) at SourceForge.net. Fast, secure and Free Open Source software downloads"
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border="0" height="30" width="120" /></a>
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<a href="http://jigsaw.w3.org/css-validator/"><img src="images/valid-css.png"
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alt="Valid CSS!" border="0" height="31" width="88" /></a>
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<p>HTML markup and design by <a
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href="http://www.rjamorim.com" target="_blank">Roberto Amorim</a> and <a
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href="http://www.maresweb.de" target="_blank">Sebastian Mares</a>. Logo by <a
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href="http://www.brightercreative.co.uk">Sam Fisher</a>.</p>
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</div>
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</div>
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</body>
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</html>
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