mirror of
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a0f03b0675
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@2591 af4574ff-66df-0310-9fd7-8a98e5e911e0
141 lines
5.2 KiB
XML
141 lines
5.2 KiB
XML
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY xvid-download-http "http://files.xvid.org/downloads/xvidcore-&xvid-version;.tar.bz2">
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<!ENTITY xvid-download-ftp " ">
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<!ENTITY xvid-size "524 KB">
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<!ENTITY xvid-buildsize "5.5 MB">
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<!ENTITY xvid-time "0.19 SBU">
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]>
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<sect1 id="xvid" xreflabel="XviD-&xvid-version;">
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<sect1info>
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<othername>$LastChangedBy: $</othername>
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<date>$Date: $</date>
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</sect1info>
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<?dbhtml filename="xvid.html"?>
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<title>XviD-&xvid-version;</title>
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<sect2>
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<title>Introduction to <application>XviD</application></title>
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<!--
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OpenDivX or Xvid?
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OpenDivX is a free implementation of the mpeg4-codec. Alas, the
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developers at ProjectMayo didn't gratefully release their actual source
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in compileable versions, so the displeasure of the users majority
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canalized into a new project named Xvid.
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Xvid development was interrupted in Autumn 2002 due to a code-theft
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the developers at Sigma design committed but it is continued now.
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For worse luck, OpenDivX and Xvid are using the same header file
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names (an issue that wouldn't be resolved easily) and function
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namespace, so you'll have to choose which one to use.
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I personally vote for Xvid, because the installation from sources
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is much smoother. If you use mencoder and transcode at the same time,
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you may want to choose different codecs for each.
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-->
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<para><application>XviD</application> is a <acronym>MPEG</acronym>-4
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compliant video <acronym>CODEC</acronym>.</para>
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<sect3><title>Package information</title>
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<itemizedlist spacing='compact'>
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<listitem><para>Download (HTTP): <ulink url="&xvid-download-http;"/></para></listitem>
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<listitem><para>Download (FTP): <ulink url="&xvid-download-ftp;"/></para></listitem>
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<listitem><para>Download size: &xvid-size;</para></listitem>
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<listitem><para>Estimated Disk space required: &xvid-buildsize;</para></listitem>
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<listitem><para>Estimated build time: &xvid-time;</para></listitem></itemizedlist>
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</sect3>
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<sect3><title><application>XviD</application> dependencies</title>
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<sect4><title>Optional</title>
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<para><xref linkend="NASM"/>
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</para></sect4>
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</sect3>
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</sect2>
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<sect2>
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<title>Installation of <application>XviD</application></title>
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<para>Install <application>XviD</application> by running the following commands:</para>
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<screen><userinput><command>cd build/generic &&
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./configure --prefix=/usr &&
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make &&
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make install &&
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ln -sf libxvidcore.so.4.0 /usr/lib/libxvidcore.so.4 &&
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ln -sf libxvidcore.so.4 /usr/lib/libxvidcore.so</command></userinput></screen>
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</sect2>
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<sect2>
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<title>Command explanations</title>
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<para><command>ln -s libxvidcore.so.4 /usr/lib/libxvidcore.so</command>:
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This command makes applications linked against
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<filename class="libraryfile">.so</filename> names, link to
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<filename class="libraryfile">.so.<replaceable>MAJOR</replaceable></filename>.
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This ensures better binary compatibility, as
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<application>XviD</application> developers take care not changing the
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<replaceable>MAJOR</replaceable> number until there is an incompatible
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<acronym>ABI</acronym> change.</para>
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</sect2>
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<sect2>
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<title>Contents</title>
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<para>The <application>XviD</application> core package contains the <filename
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class="libraryfile">libxvidcore</filename> library.</para>
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</sect2>
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<sect2><title>Description</title>
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<sect3><title>libxvidcore</title>
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<para><filename class="libraryfile">libxvidcore</filename> provides
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functions to encode and decode most <acronym>MPEG</acronym>-4 video
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data.</para></sect3>
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<!--
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<para>Following features of MPEG-4 are supported:</para>
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<para><emphasis>I, P Frame encoding</emphasis></para>
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<para>I-Frames are image frames, while P-Frames are Pattern Frames.
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Image Frames contain full images. P-Frames contain patterns of what changes in
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the image, thusly saving a lot of space.</para>
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<para><emphasis>PMVFast and EPZS with diamond a sqare pattern motion
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estimation</emphasis></para>
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<para>Fast Motion detection that can refer a square or diamond
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shaped pattern to different directions.</para>
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<para><emphasis>inter4v mode</emphasis></para>
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<para>Fast interpolation ability.</para>
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<para><emphasis>fullpixel and halfpixel precision</emphasis></para>
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<para>Even halfpixel movements can be encoded. Better precision
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results in better compression at better quality.</para>
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<para><emphasis>both MPEG-4 and H263 quantizations</emphasis></para>
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<para>MPEG-4 is the standard DivX was derived from. H263 is a
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slightly changed subset of that standard made by Microsoft. Quantization
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means to map the quantity of color values to numbers.</para>
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<para><emphasis>custom quant matrices</emphasis></para>
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<para>The quantization can be done using custom matrices,
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possibly giving better results if the matrix is made to suit the video
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data. Every normal user should be fine with the default matrix that comes
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with <application>XviD</application>.</para>
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<para><emphasis>Adaptive quantization / Luminance masking</emphasis></para>
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<para>Qantization and Luminance masking are variant, depending
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on the input material, therefore providing better results on dark or very
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contrasting images.</para>
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-->
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</sect2>
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</sect1>
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