[ab4fdfc] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[6732c094] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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[48b7295] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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| 5 | %general-entities;
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[06a5391] | 6 |
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[dc40cb9] | 7 | <!ENTITY liba52-download-http
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[17aa21c] | 8 | "https://liba52.sourceforge.net/files/a52dec-&liba52-version;.tar.gz">
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[48b7295] | 9 | <!ENTITY liba52-download-ftp " ">
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[06a5391] | 10 | <!ENTITY liba52-md5sum "caa9f5bc44232dc8aeea773fea56be80">
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[48b7295] | 11 | <!ENTITY liba52-size "236 KB">
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[64eb1e84] | 12 | <!ENTITY liba52-buildsize "2.5 MB">
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| 13 | <!ENTITY liba52-time "less than 0.1 SBU">
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[48b7295] | 14 | ]>
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| 15 |
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[fd680fb] | 16 | <sect1 id="liba52" xreflabel="liba52-&liba52-version;">
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[65df2435] | 17 | <?dbhtml filename="liba52.html"?>
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| 18 |
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| 19 |
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| 20 | <title>Liba52-&liba52-version;</title>
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| 21 |
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| 22 | <indexterm zone="liba52">
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| 23 | <primary sortas="a-Liba52">Liba52</primary>
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| 24 | </indexterm>
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| 25 |
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| 26 | <sect2 role="package">
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| 27 | <title>Introduction to Liba52</title>
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| 28 |
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[2eeb8695] | 29 | <para>
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| 30 | <application>liba52</application> is a free library for decoding
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| 31 | ATSC A/52 (also known as AC-3) streams. The A/52 standard is used
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| 32 | in a variety of applications, including digital television and DVD.
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| 33 | </para>
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[65df2435] | 34 |
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[332bad2a] | 35 | &lfs120_checked;
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[e355f3c6] | 36 |
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[65df2435] | 37 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 38 | <itemizedlist spacing="compact">
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| 39 | <listitem>
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[2eeb8695] | 40 | <para>
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| 41 | Download (HTTP): <ulink url="&liba52-download-http;"/>
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| 42 | </para>
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[65df2435] | 43 | </listitem>
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| 44 | <listitem>
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[2eeb8695] | 45 | <para>
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| 46 | Download (FTP): <ulink url="&liba52-download-ftp;"/>
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| 47 | </para>
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[65df2435] | 48 | </listitem>
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| 49 | <listitem>
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[2eeb8695] | 50 | <para>
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| 51 | Download MD5 sum: &liba52-md5sum;
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| 52 | </para>
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[65df2435] | 53 | </listitem>
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| 54 | <listitem>
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[2eeb8695] | 55 | <para>
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| 56 | Download size: &liba52-size;
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| 57 | </para>
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[65df2435] | 58 | </listitem>
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| 59 | <listitem>
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[2eeb8695] | 60 | <para>
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| 61 | Estimated disk space required: &liba52-buildsize;
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| 62 | </para>
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[65df2435] | 63 | </listitem>
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| 64 | <listitem>
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[2eeb8695] | 65 | <para>
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| 66 | Estimated build time: &liba52-time;
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| 67 | </para>
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[65df2435] | 68 | </listitem>
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| 69 | </itemizedlist>
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| 70 |
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[dc40cb9] | 71 | <bridgehead renderas="sect4">Optional</bridgehead>
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[47274444] | 72 | <para role="optional">
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[75b1a338] | 73 | <ulink url="https://cr.yp.to/djbfft.html">djbfft</ulink>
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[47274444] | 74 | </para>
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[dc40cb9] | 75 |
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[27442a31] | 76 | <para condition="html" role="usernotes">
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| 77 | Editor Notes: <ulink url="&blfs-wiki;/liba52"/>
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| 78 | </para>
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| 79 |
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[65df2435] | 80 | </sect2>
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| 81 |
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| 82 | <sect2 role="installation">
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| 83 | <title>Installation of Liba52</title>
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| 84 |
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[2eeb8695] | 85 | <para>
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| 86 | Install <application>liba52</application> by running the
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| 87 | following commands:
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| 88 | </para>
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[65df2435] | 89 |
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[68dfef54] | 90 | <screen><userinput>./configure --prefix=/usr \
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[62e5e8f] | 91 | --mandir=/usr/share/man \
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[68dfef54] | 92 | --enable-shared \
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| 93 | --disable-static \
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[dcf0bcc2] | 94 | CFLAGS="${CFLAGS:--g -O3} -fPIC" &&
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[65df2435] | 95 | make</userinput></screen>
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| 96 |
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[2eeb8695] | 97 | <para>
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| 98 | To test the results, issue: <command>make check</command>.
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| 99 | </para>
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[4d32631] | 100 |
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[2eeb8695] | 101 | <para>
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| 102 | Now, as the <systemitem class="username">root</systemitem>
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| 103 | user:
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| 104 | </para>
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[65df2435] | 105 |
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| 106 | <screen role="root"><userinput>make install &&
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[dc40cb9] | 107 | cp liba52/a52_internal.h /usr/include/a52dec &&
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[64eb1e84] | 108 | install -v -m644 -D doc/liba52.txt \
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[65df2435] | 109 | /usr/share/doc/liba52-&liba52-version;/liba52.txt</userinput></screen>
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[dc40cb9] | 110 | </sect2>
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| 111 |
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| 112 | <sect2 role="commands">
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| 113 | <title>Command Explanations</title>
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| 114 |
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[2eeb8695] | 115 | <para>
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[dcf0bcc2] | 116 | <parameter>CFLAGS="${CFLAGS:--g -O3} -fPIC"</parameter>: This appends
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| 117 | <option>-fPIC</option> to <envar>CFLAGS</envar> but use
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| 118 | <option>-g -O3</option> (the default of this package) instead of an
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| 119 | empty string when <envar>CFLAGS</envar> is not set.
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| 120 | This is needed to compile <application>liba52</application> without
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| 121 | runtime text relocation. Runtime text relocation is prohibited on
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| 122 | x86_64 so <option>-fPIC</option> is strictly required. On 32-bit x86
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| 123 | runtime text relocation is allowed but it's insecure and it may waste
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| 124 | physical RAM, so <option>-fPIC</option> is still better.
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[2eeb8695] | 125 | </para>
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[65df2435] | 126 |
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[c33c599] | 127 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 128 | href="../../xincludes/static-libraries.xml"/>
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[dc40cb9] | 129 |
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[2eeb8695] | 130 | <para>
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| 131 | <command>cp liba52/a52_internal.h ...</command>: Copying this header
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| 132 | file into /usr/include/a52dec allows some other programs (such as
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| 133 | <application>xine-lib</application>) to compile and link against a system
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| 134 | installed <application>liba52</application>.
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| 135 | </para>
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[65df2435] | 136 | </sect2>
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| 137 |
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| 138 | <sect2 role="content">
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| 139 | <title>Contents</title>
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| 140 |
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| 141 | <segmentedlist>
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| 142 | <segtitle>Installed Programs</segtitle>
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| 143 | <segtitle>Installed Library</segtitle>
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| 144 | <segtitle>Installed Directories</segtitle>
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| 145 |
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| 146 | <seglistitem>
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| 147 | <seg>a52dec and extract_a52</seg>
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[dc40cb9] | 148 | <seg>liba52.so</seg>
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| 149 | <seg>/usr/include/a52dec and
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| 150 | /usr/share/doc/liba52-&liba52-version;</seg>
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[65df2435] | 151 | </seglistitem>
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| 152 | </segmentedlist>
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| 153 |
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| 154 | <variablelist>
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| 155 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 156 | <?dbfo list-presentation="list"?>
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| 157 | <?dbhtml list-presentation="table"?>
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| 158 |
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| 159 | <varlistentry id="a52dec">
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| 160 | <term><command>a52dec</command></term>
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| 161 | <listitem>
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[2eeb8695] | 162 | <para>
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[4c24eb0a] | 163 | plays ATSC A/52 audio streams
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[2eeb8695] | 164 | </para>
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[65df2435] | 165 | <indexterm zone="liba52 a52dec">
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| 166 | <primary sortas="b-a52dec">a52dec</primary>
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| 167 | </indexterm>
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| 168 | </listitem>
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| 169 | </varlistentry>
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| 170 |
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| 171 | <varlistentry id="extract_a52">
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| 172 | <term><command>extract_a52</command></term>
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| 173 | <listitem>
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[2eeb8695] | 174 | <para>
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[4c24eb0a] | 175 | extracts ATSC A/52 audio from an MPEG stream
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[2eeb8695] | 176 | </para>
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[65df2435] | 177 | <indexterm zone="liba52 extract_a52">
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| 178 | <primary sortas="b-extract_a52">extract_a52</primary>
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| 179 | </indexterm>
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| 180 | </listitem>
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| 181 | </varlistentry>
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| 182 |
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| 183 | <varlistentry id="liba52-lib">
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[4c24eb0a] | 184 | <term><filename class="libraryfile">liba52.so</filename></term>
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[65df2435] | 185 | <listitem>
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[2eeb8695] | 186 | <para>
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[4c24eb0a] | 187 | provides functions for the programs dealing with ATSC A/52 streams
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[2eeb8695] | 188 | </para>
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[65df2435] | 189 | <indexterm zone="liba52 liba52-lib">
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[dc40cb9] | 190 | <primary sortas="c-liba52">liba52.so</primary>
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[65df2435] | 191 | </indexterm>
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| 192 | </listitem>
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| 193 | </varlistentry>
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| 194 | </variablelist>
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| 195 | </sect2>
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[4c24eb0a] | 196 |
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[d98b0ca] | 197 | </sect1>
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