<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>6.19. Other visualization hardware</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="mpeg_decoders.html" title="6.18. MPEG decoders"><link rel="next" href="tvout.html" title="6.20. TV-out support"><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"><link rel="subsection" href="other.html#zr" title="6.19.1. Zr"><link rel="subsection" href="other.html#blinkenlights" title="6.19.2. Blinkenlights"></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">6.19. Other visualization hardware</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="mpeg_decoders.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="tvout.html">下一页</a></td></tr></table><hr></div><div class="sect1" title="6.19. Other visualization hardware"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="other"></a>6.19. Other visualization hardware</h2></div></div></div><div class="sect2" title="6.19.1. Zr"><div class="titlepage"><div><div><h3 class="title"><a name="zr"></a>6.19.1. Zr</h3></div></div></div><p>
This is a display-driver (<tt class="option">-vo zr</tt>) for a number of MJPEG
capture/playback cards (tested for DC10+ and Buz, and it should work for the
LML33, the DC10). The driver works by encoding the frame to JPEG and then
sending it to the card. For the JPEG encoding
<code class="systemitem">libavcodec</code>
is used, and required. With the special <span class="emphasis"><em>cinerama</em></span> mode,
you can watch movies in true wide screen provided that you have two beamers
and two MJPEG cards. Depending on resolution and quality settings, this driver
may require a lot of CPU power, remember to specify <tt class="option">-framedrop</tt>
if your machine is too slow. Note: My AMD K6-2 350MHz is (with
<tt class="option">-framedrop</tt>) quite adequate for watching VCD sized material and
downscaled movies.
</p><p>
This driver talks to the kernel driver available at
<a class="ulink" href="http://mjpeg.sf.net" target="_top">http://mjpeg.sf.net</a>, so
you must get it working first. The presence of an MJPEG card is autodetected by
the <tt class="filename">configure</tt> script, if autodetection fails, force
detection with
</p><pre class="screen">./configure --enable-zr</pre><p>
</p><p>
The output can be controlled by several options, a long description of the
options can be found in the man page, a short list of options can be viewed
by running
</p><pre class="screen">mplayer -zrhelp</pre><p>
</p><p>
Things like scaling and the OSD (on screen display) are not handled by
this driver but can be done using the video filters. For example, suppose
that you have a movie with a resolution of 512x272 and you want to view it
fullscreen on your DC10+. There are three main possibilities, you may scale
the movie to a width of 768, 384 or 192. For performance and quality reasons,
I would choose to scale the movie to 384x204 using the fast bilinear software
scaler. The command line is
</p><pre class="screen">
mplayer -vo zr -sws 0 -vf scale=384:204 <em class="replaceable"><code>movie.avi</code></em>
</pre><p>
</p><p>
Cropping can be done by the <tt class="option">crop</tt> filter and by this
driver itself. Suppose that a movie is too wide for display on your Buz and
that you want to use <tt class="option">-zrcrop</tt> to make the movie less wide,
then you would issue the following command
</p><pre class="screen">
mplayer -vo zr -zrcrop 720x320+80+0 <em class="replaceable"><code>benhur.avi</code></em>
</pre><p>
</p><p>
if you want to use the <tt class="option">crop</tt> filter, you would do
</p><pre class="screen">
mplayer -vo zr -vf crop=720:320:80:0 <em class="replaceable"><code>benhur.avi</code></em>
</pre><p>
</p><p>
Extra occurrences of <tt class="option">-zrcrop</tt> invoke
<span class="emphasis"><em>cinerama</em></span> mode, i.e. you can distribute the movie over
several TVs or beamers to create a larger screen.
Suppose you have two beamers. The left one is connected to your
Buz at <tt class="filename">/dev/video1</tt> and the right one is connected to
your DC10+ at <tt class="filename">/dev/video0</tt>. The movie has a resolution
of 704x288. Suppose also that you want the right beamer in black and white and
that the left beamer should have JPEG frames at quality 10, then you would
issue the following command
</p><pre class="screen">
mplayer -vo zr -zrdev /dev/video0 -zrcrop 352x288+352+0 -zrxdoff 0 -zrbw \
-zrcrop 352x288+0+0 -zrdev /dev/video1 -zrquality 10 \
<em class="replaceable"><code>movie.avi</code></em>
</pre><p>
</p><p>
You see that the options appearing before the second <tt class="option">-zrcrop</tt>
only apply to the DC10+ and that the options after the second
<tt class="option">-zrcrop</tt> apply to the Buz. The maximum number of MJPEG cards
participating in <span class="emphasis"><em>cinerama</em></span> is four, so you can build a
2x2 vidiwall.
</p><p>
Finally an important remark: Do not start or stop XawTV on the playback device
during playback, it will crash your computer. It is, however, fine to
<span class="bold"><strong>FIRST</strong></span> start XawTV,
<span class="bold"><strong>THEN</strong></span> start <span class="application">MPlayer</span>,
wait for <span class="application">MPlayer</span>
to finish and <span class="bold"><strong>THEN</strong></span> stop XawTV.
</p></div><div class="sect2" title="6.19.2. Blinkenlights"><div class="titlepage"><div><div><h3 class="title"><a name="blinkenlights"></a>6.19.2. Blinkenlights</h3></div></div></div><p>
This driver is capable of playback using the Blinkenlights UDP protocol. If you
don't know what <a class="ulink" href="http://www.blinkenlights.de/" target="_top">Blinkenlights</a>
or its successor
<a class="ulink" href="http://www.blinkenlights.de/arcade/" target="_top">Arcade</a>
are, find it out. Although this is most probably the least used video output
driver, without a doubt it is the coolest <span class="application">MPlayer</span>
has to offer. Just watch some of the
<a class="ulink" href="http://www.blinkenlights.de/video.en.html" target="_top">Blinkenlights documentation videos</a>.
On the Arcade video you can see the Blinkenlights output driver in
action at 00:07:50.
</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="mpeg_decoders.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="tvout.html">下一页</a></td></tr><tr><td width="40%" align="left" valign="top">6.18. MPEG decoders </td><td width="20%" align="center"><a accesskey="h" href="index.html">起始页</a></td><td width="40%" align="right" valign="top"> 6.20. TV-out support</td></tr></table></div></body></html>
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