<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>10.6. Rescaling movies</title><link rel="stylesheet" href="default.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.75.2"><link rel="home" href="index.html" title="MPlayer - The Movie Player"><link rel="up" href="mencoder.html" title="Chapter 10. Basic usage of MEncoder"><link rel="prev" href="menc-feat-mpeg.html" title="10.5. Encoding to MPEG format"><link rel="next" href="menc-feat-streamcopy.html" title="10.7. Stream copying"><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="advaudio.html" title="Chapter 4. Advanced audio usage"><link rel="chapter" href="cd-dvd.html" title="Chapter 5. CD/DVD usage"><link rel="chapter" href="tv.html" title="Chapter 6. TV"><link rel="chapter" href="radio.html" title="Chapter 7. Radio"><link rel="chapter" href="video.html" title="Chapter 8. Video output devices"><link rel="chapter" href="ports.html" title="Chapter 9. Ports"><link rel="chapter" href="mencoder.html" title="Chapter 10. Basic usage of MEncoder"><link rel="chapter" href="encoding-guide.html" title="Chapter 11. Encoding with MEncoder"><link rel="chapter" href="faq.html" title="Chapter 12. Frequently Asked Questions"><link rel="appendix" href="bugreports.html" title="Appendix A. How to report bugs"><link rel="appendix" href="skin.html" title="Appendix B. MPlayer skin format"></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">10.6. Rescaling movies</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="menc-feat-mpeg.html">Prev</a> </td><th width="60%" align="center">Chapter 10. Basic usage of <span class="application">MEncoder</span></th><td width="20%" align="right"> <a accesskey="n" href="menc-feat-streamcopy.html">Next</a></td></tr></table><hr></div><div class="sect1" title="10.6. Rescaling movies"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="menc-feat-rescale"></a>10.6. Rescaling movies</h2></div></div></div><p>
Often the need to resize movie images emerges. The reasons can be
many: decreasing file size, network bandwidth, etc. Most people even do
rescaling when converting DVDs or SVCDs to DivX AVI. If you wish to rescale,
read the <a class="link" href="aspect.html" title="10.10. Preserving aspect ratio">Preserving aspect ratio</a> section.
</p><p>
The scaling process is handled by the <code class="literal">scale</code> video filter:
<tt class="option">-vf scale=<em class="replaceable"><code>width</code></em>:<em class="replaceable"><code>height</code></em></tt>.
Its quality can be set with the <tt class="option">-sws</tt> option.
If it is not specified, <span class="application">MEncoder</span> will use 2: bicubic.
</p><p>
Usage:
</p><pre class="screen">
mencoder <em class="replaceable"><code>input.mpg</code></em> -ovc lavc -lavcopts vcodec=mpeg4:mbd=2:trell \
-vf scale=640:480 -o <em class="replaceable"><code>output.avi</code></em>
</pre><p>
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