mirror of
https://github.com/Zeckmathederg/glfs.git
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245 lines
7.7 KiB
XML
245 lines
7.7 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY % general-entities SYSTEM "../../general.ent">
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%general-entities;
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<!ENTITY faac-download-http "https://github.com/knik0/faac/archive/&faac-version;/faac-&faac-version;.tar.gz">
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<!ENTITY faac-download-ftp " ">
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<!ENTITY faac-md5sum "8d61e6d55088e599aa91532d5e6995b0">
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<!ENTITY faac-size "240 KB">
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<!ENTITY faac-buildsize "4.7 MB">
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<!ENTITY faac-time "less than 0.1 SBU">
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]>
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<sect1 id="faac" xreflabel="FAAC-&faac-version;">
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<?dbhtml filename="faac.html"?>
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<title>FAAC-&faac-version;</title>
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<indexterm zone="faac">
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<primary sortas="a-faac">faac</primary>
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</indexterm>
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<sect2 role="package">
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<title>Introduction to FAAC</title>
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<para>
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<application>FAAC</application> is an encoder for a lossy sound
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compression scheme specified in MPEG-2 Part 7 and MPEG-4 Part 3 standards
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and known as Advanced Audio Coding (AAC). This encoder is useful for
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producing files that can be played back on iPod. Moreover, iPod does not
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understand other sound compression schemes in video files.
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</para>
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&lfs112_checked;
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<bridgehead renderas="sect3">Package Information</bridgehead>
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<itemizedlist spacing="compact">
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<listitem>
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<para>
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Download (HTTP): <ulink url="&faac-download-http;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download (FTP): <ulink url="&faac-download-ftp;"/>
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</para>
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</listitem>
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<listitem>
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<para>
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Download MD5 sum: &faac-md5sum;
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</para>
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</listitem>
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<listitem>
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<para>
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Download size: &faac-size;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated disk space required: &faac-buildsize;
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</para>
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</listitem>
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<listitem>
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<para>
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Estimated build time: &faac-time;
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</para>
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</listitem>
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</itemizedlist>
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<para condition="html" role="usernotes">User Notes:
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<ulink url="&blfs-wiki;/faac"/></para>
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</sect2>
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<sect2 role="installation">
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<title>Installation of FAAC</title>
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<para>
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Install <application>FAAC</application> by running the
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following commands:
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</para>
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<screen><userinput>./bootstrap &&
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./configure --prefix=/usr --disable-static &&
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make</userinput></screen>
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<para>
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This package does not come with a test suite. However, basic
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functionality can be tested by encoding a sample WAV file (the sample
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file is installed by the <xref linkend="alsa-utils"/> package:
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</para>
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<screen remap="test"><userinput>./frontend/faac -o Front_Left.mp4 /usr/share/sounds/alsa/Front_Left.wav</userinput></screen>
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<para>
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Then, decode the result using the <command>faad</command> program
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from the <xref linkend="faad2"/> package and play back the decoded file
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(requires the <command>aplay</command> program from the
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<xref linkend="alsa-utils"/> package:
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</para>
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<screen remap="test"><userinput>faad Front_Left.mp4
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aplay Front_Left.wav</userinput></screen>
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<para>
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<command>aplay</command> should identify the file as
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<quote>Signed 16 bit Little Endian, Rate 48000 Hz, Stereo</quote>, and
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you should hear the words <quote>front left</quote>.
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</para>
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<para>
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Now, as the <systemitem class="username">root</systemitem> user:
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</para>
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<screen role="root"><userinput>make install</userinput></screen>
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</sect2>
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<sect2 role="commands">
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<title>Command Explanations</title>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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href="../../xincludes/static-libraries.xml"/>
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<!-- 1.28: This is still broken, it causes a segfault. -->
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<!--
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<para>
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<option>- -enable-drm</option>: This option is supposed to enable
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support for encoding files for
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<ulink url="http://www.drm.org/">Digital Radio Mondiale</ulink>, but
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actually breaks the base functionality of the package (e.g., the resulting
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<command>faac</command> program produces files that cannot be decoded
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by <xref linkend="faad2"/>, even if compiled with DRM support).
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Don't use it.
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</para>
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-->
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<!-- Since we say "Don't use it", let's not even list it. That would open up
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the possibility of a user seeing it and enabling it anyway. -->
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</sect2>
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<sect2>
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<title>Other AAC encoders</title>
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<para>
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The quality of <application>FAAC</application> is not up
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to par with the best AAC encoders currently available. Also, it only
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supports AAC and not High Efficiency AAC (also known as aacPlus), which
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provides better quality at low bitrates by means of using the
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<quote>spectral band replication</quote> technology. There are the
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following alternative programs for producing AAC and HE-AAC streams:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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<ulink url="http://www.nero.com/eng/nero-aac-codec.html">Nero AAC
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Codec</ulink>:
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available only in the binary form, the command-line AAC and HE-AAC
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encoders for Linux are in the same archive as the Windows
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application.
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</para>
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</listitem>
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<listitem>
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<para>
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<ulink url="http://www.3gpp.org/ftp/Specs/html-info/26410.htm">3GPP
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Enhanced aacPlus general audio codec</ulink>:
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available in the source form, can encode only HE-AAC up to 48 kbps
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out of the box, but the maximum bitrate can be changed by editing
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the tuning table in the
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<filename>FloatFR_sbrenclib/src/sbr_main.c</filename> file.
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</para>
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</listitem>
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</itemizedlist>
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<para>
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Note, however, that iPod supports only Low Complexity AAC profile, which
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is the default in FAAC, but may not be the default in Nero AAC Encoder
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and is completely unavailable in the 3GPP encoder.
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</para>
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</sect2>
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<sect2 role="content">
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<title>Contents</title>
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<segmentedlist>
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<segtitle>Installed Program</segtitle>
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<segtitle>Installed Libraries</segtitle>
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<segtitle>Installed Directories</segtitle>
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<seglistitem>
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<seg>faac</seg>
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<seg>libfaac.so and libmp4v2.so</seg>
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<seg>None</seg>
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</seglistitem>
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</segmentedlist>
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<variablelist>
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<bridgehead renderas="sect3">Short Descriptions</bridgehead>
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<?dbfo list-presentation="list"?>
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<?dbhtml list-presentation="table"?>
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<varlistentry id="faac-prog">
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<term><command>faac</command></term>
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<listitem>
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<para>
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is a command-line AAC encoder
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</para>
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<indexterm zone="faac faac-prog">
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<primary sortas="b-faac">faac</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libfaac">
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<term><filename class="libraryfile">libfaac.so</filename></term>
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<listitem>
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<para>
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contains functions for encoding AAC streams
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</para>
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<indexterm zone="faac libfaac">
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<primary sortas="c-libfaac">libfaac.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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<varlistentry id="libmp4v2">
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<term><filename class="libraryfile">libmp4v2.so</filename></term>
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<listitem>
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<para>
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contains functions for creating and manipulating MP4 files
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</para>
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<indexterm zone="faac libmp4v2">
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<primary sortas="c-libmp4v2">libmp4v2.so</primary>
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</indexterm>
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</listitem>
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</varlistentry>
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</variablelist>
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</sect2>
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</sect1>
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