Sophie: mplayer-doc-1.0-1.rc4.0.r31086.3.1mdv2010.2 i586

mplayer-doc-1.0-1.rc4.0.r31086.3.1mdv2010.2.i586.rpm

<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>6.5. SVGAlib</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 - 电影播放器"><link rel="up" href="video.html" title="第 6 章 Video output devices"><link rel="prev" href="sdl.html" title="6.4. SDL"><link rel="next" href="fbdev.html" title="6.6. Framebuffer output (FBdev)"><link rel="preface" href="howtoread.html" title="如何阅读此文档"><link rel="chapter" href="intro.html" title="第 1 章 介绍"><link rel="chapter" href="install.html" title="第 2 章 Installation"><link rel="chapter" href="usage.html" title="第 3 章 Usage"><link rel="chapter" href="advaudio.html" title="第 4 章 Advanced audio usage"><link rel="chapter" href="cd-dvd.html" title="第 5 章 CD/DVD用法"><link rel="chapter" href="video.html" title="第 6 章 Video output devices"><link rel="chapter" href="tv.html" title="第 7 章 TV"><link rel="chapter" href="radio.html" title="第 8 章 广播电台"><link rel="chapter" href="ports.html" title="第 9 章 Ports"><link rel="chapter" href="mencoder.html" title="第 10 章 MEncoder的基础用法"><link rel="chapter" href="encoding-guide.html" title="第 11 章 Encoding with MEncoder"><link rel="chapter" href="faq.html" title="第 12 章 Frequently Asked Questions"><link rel="appendix" href="bugreports.html" title="附录 A. 如何报告错误"><link rel="appendix" href="skin.html" title="附录 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">6.5. SVGAlib</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sdl.html">上一页</a> </td><th width="60%" align="center">第 6 章 Video output devices</th><td width="20%" align="right"> <a accesskey="n" href="fbdev.html">下一页</a></td></tr></table><hr></div><div class="sect1" title="6.5. SVGAlib"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="svgalib"></a>6.5. SVGAlib</h2></div></div></div><p title="INSTALLATION"><b>INSTALLATION. </b>
You'll have to install svgalib and its development package in order for
<span class="application">MPlayer</span> build its SVGAlib driver (autodetected,
but can be forced), and don't forget to edit
<tt class="filename">/etc/vga/libvga.config</tt> to suit your card and monitor.
</p><div class="note" title="注意" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">注意</h3><p>
Be sure not to use the <tt class="option">-fs</tt> switch, since it toggles the
usage of the software scaler, and it's slow. If you really need it, use the
<tt class="option">-sws 4</tt> option which will produce bad quality, but is
somewhat faster.
</p></div><p title="EGA (4BPP) SUPPORT"><b>EGA (4BPP) SUPPORT. </b>
SVGAlib incorporates EGAlib, and <span class="application">MPlayer</span> has the
possibility to display any movie in 16 colors, thus usable in the following
sets:
</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
  EGA card with EGA monitor: 320x200x4bpp, 640x200x4bpp, 640x350x4bpp
</p></li><li class="listitem"><p>
  EGA card with CGA monitor: 320x200x4bpp, 640x200x4bpp
</p></li></ul></div><p>
The bpp (bits per pixel) value must be set to 4 by hand:
<tt class="option">-bpp 4</tt>
</p><p>
The movie probably must be scaled down to fit in EGA mode:
</p><pre class="screen">-vf scale=640:350</pre><p>
or
</p><pre class="screen">-vf scale=320:200</pre><p>
</p><p>
For that we need fast but bad quality scaling routine:
</p><pre class="screen">-sws 4</pre><p>
</p><p>
Maybe automatic aspect correction has to be shut off:
</p><pre class="screen">-noaspect</pre><p>
</p><div class="note" title="注意" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">注意</h3><p>
According to my experience the best image quality on
EGA screens can be achieved by decreasing the brightness a bit:
<tt class="option">-vf eq=-20:0</tt>. I also needed to lower the audio
samplerate on my box, because the sound was broken on 44kHz:
<tt class="option">-srate 22050</tt>.
</p></div><p>
You can turn on OSD and subtitles only with the <tt class="option">expand</tt>
filter, see the man page for exact parameters.
</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sdl.html">上一页</a> </td><td width="20%" align="center"><a accesskey="u" href="video.html">上一级</a></td><td width="40%" align="right"> <a accesskey="n" href="fbdev.html">下一页</a></td></tr><tr><td width="40%" align="left" valign="top">6.4. SDL </td><td width="20%" align="center"><a accesskey="h" href="index.html">起始页</a></td><td width="40%" align="right" valign="top"> 6.6. Framebuffer output (FBdev)</td></tr></table></div></body></html>