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  • Committer: William Grant
  • Date: 2007-02-03 03:16:07 UTC
  • mto: This revision was merged to the branch mainline in revision 16.
  • Revision ID: william.grant@ubuntu.org.au-20070203031607-08gc2ompbz6spt9i
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DOCS/HTML/en/menc-feat-mpeg4.html
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>12.3.�Encoding two pass MPEG-4 ("DivX")</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="start" href="index.html" title="MPlayer - The Movie Player"><link rel="up" href="mencoder.html" title="Chapter�12.�Basic usage of MEncoder"><link rel="prev" href="menc-feat-selecting-input.html" title="12.2.�Selecting input file or device"><link rel="next" href="menc-feat-mpeg.html" title="12.4.�Encoding to MPEG format"><link rel="preface" href="howtoread.html" title="How to read this documentation"><link rel="chapter" href="intro.html" title="Chapter�1.�Introduction"><link rel="chapter" href="install.html" title="Chapter�2.�Installation"><link rel="chapter" href="usage.html" title="Chapter�3.�Usage"><link rel="chapter" href="cd-dvd.html" title="Chapter�4.�CD/DVD usage"><link rel="chapter" href="faq.html" title="Chapter�5.�Frequently Asked Questions"><link rel="chapter" href="containers.html" title="Chapter�6.�Containers"><link rel="chapter" href="codecs.html" title="Chapter�7.�Codecs"><link rel="chapter" href="video.html" title="Chapter�8.�Video output devices"><link rel="chapter" href="audio.html" title="Chapter�9.�Audio output devices"><link rel="chapter" href="tv.html" title="Chapter�10.�TV"><link rel="chapter" href="ports.html" title="Chapter�11.�Ports"><link rel="chapter" href="mencoder.html" title="Chapter�12.�Basic usage of MEncoder"><link rel="chapter" href="encoding-guide.html" title="Chapter�13.�Encoding with MEncoder"><link rel="appendix" href="mailinglists.html" title="Appendix�A.�Mailing lists"><link rel="appendix" href="bugreports.html" title="Appendix�B.�How to report bugs"><link rel="appendix" href="bugs.html" title="Appendix�C.�Known bugs"><link rel="appendix" href="skin.html" title="Appendix�D.�MPlayer skin format"><link rel="appendix" href="users-vs-dev.html" title="Appendix�E.�Developer cries"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">12.3.�Encoding two pass MPEG-4 ("DivX")</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="menc-feat-selecting-input.html">Prev</a>�</td><th width="60%" align="center">Chapter�12.�Basic usage of <span class="application">MEncoder</span></th><td width="20%" align="right">�<a accesskey="n" href="menc-feat-mpeg.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="menc-feat-mpeg4"></a>12.3.�Encoding two pass MPEG-4 ("DivX")</h2></div></div></div><p>
 
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<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>13.3.�Encoding two pass MPEG-4 ("DivX")</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="start" href="index.html" title="MPlayer - The Movie Player"><link rel="up" href="mencoder.html" title="Chapter�13.�Basic usage of MEncoder"><link rel="prev" href="menc-feat-selecting-input.html" title="13.2.�Selecting input file or device"><link rel="next" href="menc-feat-handheld-psp.html" title="13.4.�Encoding to Sony PSP video format"><link rel="preface" href="howtoread.html" title="How to read this documentation"><link rel="chapter" href="intro.html" title="Chapter�1.�Introduction"><link rel="chapter" href="install.html" title="Chapter�2.�Installation"><link rel="chapter" href="usage.html" title="Chapter�3.�Usage"><link rel="chapter" href="cd-dvd.html" title="Chapter�4.�CD/DVD usage"><link rel="chapter" href="faq.html" title="Chapter�5.�Frequently Asked Questions"><link rel="chapter" href="containers.html" title="Chapter�6.�Containers"><link rel="chapter" href="codecs.html" title="Chapter�7.�Codecs"><link rel="chapter" href="video.html" title="Chapter�8.�Video output devices"><link rel="chapter" href="audio.html" title="Chapter�9.�Audio output devices"><link rel="chapter" href="tv.html" title="Chapter�10.�TV"><link rel="chapter" href="radio.html" title="Chapter�11.�Radio"><link rel="chapter" href="ports.html" title="Chapter�12.�Ports"><link rel="chapter" href="mencoder.html" title="Chapter�13.�Basic usage of MEncoder"><link rel="chapter" href="encoding-guide.html" title="Chapter�14.�Encoding with MEncoder"><link rel="appendix" href="bugreports.html" title="Appendix�A.�How to report bugs"><link rel="appendix" href="bugs.html" title="Appendix�B.�Known bugs"><link rel="appendix" href="skin.html" title="Appendix�C.�MPlayer skin format"><link rel="appendix" href="history.html" title="Appendix�D.�History"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">13.3.�Encoding two pass MPEG-4 ("DivX")</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="menc-feat-selecting-input.html">Prev</a>�</td><th width="60%" align="center">Chapter�13.�Basic usage of <span class="application">MEncoder</span></th><td width="20%" align="right">�<a accesskey="n" href="menc-feat-handheld-psp.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="menc-feat-mpeg4"></a>13.3.�Encoding two pass MPEG-4 ("DivX")</h2></div></div></div><p>
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The name comes from the fact that this method encodes the file <span class="emphasis"><em>twice</em></span>.
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The first encoding (dubbed pass) creates some temporary files
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(<tt class="filename">*.log</tt>) with a size of few megabytes, do not delete
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resulting file will have much better image quality. If this is the first
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time you heard about this, you should consult some guides available on the
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net.
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</p><div class="example"><a name="id2576655"></a><p class="title"><b>Example�12.1.�copy audio track</b></p><p>
 
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</p><div class="example"><a name="copy_audio_track"></a><p class="title"><b>Example�13.1.�copy audio track</b></p><p>
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Two pass encode of the second track a DVD to an MPEG-4 ("DivX")
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AVI while copying the audio track.
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</p><pre class="screen">
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mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac copy -o /dev/null
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mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:mbd=2:trell:vpass=2 -oac copy -o <em class="replaceable"><code>output.avi</code></em>
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</pre><p>
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</p></div><div class="example"><a name="id2576679"></a><p class="title"><b>Example�12.2.�encode audio track</b></p><p>
 
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</p></div><div class="example"><a name="encode_audio_track"></a><p class="title"><b>Example�13.2.�encode audio track</b></p><p>
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Two pass encode of a DVD to an MPEG-4 ("DivX") AVI while encoding
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the audio track to MP3.
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Be careful using this method as it may lead to audio/video desync in
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mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 -oac mp3lame -lameopts vbr=3 -o /dev/null
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mencoder dvd://2 -ovc lavc -lavcopts vcodec=mpeg4:mbd=2:trell:vpass=2 -oac mp3lame -lameopts vbr=3 -o <em class="replaceable"><code>output.avi</code></em>
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</pre><p>
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</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="menc-feat-selecting-input.html">Prev</a>�</td><td width="20%" align="center"><a accesskey="u" href="mencoder.html">Up</a></td><td width="40%" align="right">�<a accesskey="n" href="menc-feat-mpeg.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">12.2.�Selecting input file or device�</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">�12.4.�Encoding to MPEG format</td></tr></table></div></body></html>
 
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</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="menc-feat-selecting-input.html">Prev</a>�</td><td width="20%" align="center"><a accesskey="u" href="mencoder.html">Up</a></td><td width="40%" align="right">�<a accesskey="n" href="menc-feat-handheld-psp.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">13.2.�Selecting input file or device�</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">�13.4.�Encoding to Sony PSP video format</td></tr></table></div></body></html>