1 | <?xml version="1.0" encoding="ISO-8859-1"?>
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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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4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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5 | %general-entities;
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6 |
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7 | <!ENTITY libvpx-download-http "https://github.com/webmproject/libvpx/archive/v&libvpx-version;/libvpx-&libvpx-version;.tar.gz">
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8 | <!ENTITY libvpx-download-ftp " ">
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9 | <!ENTITY libvpx-md5sum "d5fd45a806a65a57d6635f9e7a98a1b2">
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10 | <!ENTITY libvpx-size "5.2 MB">
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11 | <!ENTITY libvpx-buildsize "63 MB (add 1.5 GB for tests)">
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12 | <!ENTITY libvpx-time "0.5 SBU (Using parallelism=4; add approx 15 SBU for tests using parallelism=4, including download time)">
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13 | ]>
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14 |
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15 | <sect1 id="libvpx" xreflabel="libvpx-&libvpx-version;">
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16 | <?dbhtml filename="libvpx.html"?>
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17 |
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18 |
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19 | <title>libvpx-&libvpx-version;</title>
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20 |
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21 | <indexterm zone="libvpx">
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22 | <primary sortas="a-libvpx">libvpx</primary>
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23 | </indexterm>
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24 |
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25 | <sect2 role="package">
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26 | <title>Introduction to libvpx</title>
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27 |
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28 | <para>
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29 | This package, from the WebM project, provides the reference
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30 | implementations of the VP8 Codec, used in most current html5 video,
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31 | and of the next-generation VP9 Codec.
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32 | </para>
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33 |
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34 | &lfs120_checked;
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35 |
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36 | <bridgehead renderas="sect3">Package Information</bridgehead>
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37 | <itemizedlist spacing="compact">
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38 | <listitem>
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39 | <para>
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40 | Download (HTTP): <ulink url="&libvpx-download-http;"/>
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41 | </para>
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42 | </listitem>
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43 | <listitem>
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44 | <para>
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45 | Download (FTP): <ulink url="&libvpx-download-ftp;"/>
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46 | </para>
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47 | </listitem>
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48 | <listitem>
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49 | <para>
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50 | Download MD5 sum: &libvpx-md5sum;
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51 | </para>
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52 | </listitem>
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53 | <listitem>
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54 | <para>
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55 | Download size: &libvpx-size;
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56 | </para>
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57 | </listitem>
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58 | <listitem>
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59 | <para>
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60 | Estimated disk space required: &libvpx-buildsize;
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61 | </para>
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62 | </listitem>
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63 | <listitem>
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64 | <para>
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65 | Estimated build time: &libvpx-time;
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66 | </para>
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67 | </listitem>
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68 | </itemizedlist>
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69 |
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70 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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71 | <itemizedlist spacing="compact">
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72 | <listitem>
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73 | <para>
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74 | Required patch:
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75 | <ulink url="&patch-root;/libvpx-&libvpx-version;-security_fix-1.patch"/>
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76 | </para>
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77 | </listitem>
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78 | </itemizedlist>
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79 |
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80 | <bridgehead renderas="sect3">libvpx Dependencies</bridgehead>
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81 |
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82 | <bridgehead renderas="sect4">Recommended</bridgehead>
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83 | <para role="recommended">
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84 | <xref linkend="yasm"/> or <xref role="nodep" linkend="nasm"/>, and
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85 | <xref linkend="which"/> (so <command>configure</command> can find yasm)
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86 | </para>
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87 |
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88 | <bridgehead renderas="sect4">Optional</bridgehead>
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89 | <para role="optional">
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90 | <xref linkend="curl"/> (to download test files) and
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91 | <xref linkend="doxygen"/> (to build documentation)
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92 | </para>
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93 |
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94 | &test-use-internet;
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95 |
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96 | </sect2>
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97 |
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98 | <sect2 role="installation">
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99 | <title>Installation of libvpx</title>
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100 |
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101 | <para>
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102 | Apply a patch to fix a security vulnerability:
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103 | </para>
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104 |
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105 | <screen><userinput>patch -Np1 -i ../libvpx-&libvpx-version;-security_fix-1.patch</userinput></screen>
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106 |
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107 | <para>
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108 | Install <application>libvpx</application> by running the
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109 | following commands:
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110 | </para>
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111 |
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112 | <screen><userinput>sed -i 's/cp -p/cp/' build/make/Makefile &&
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113 |
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114 | mkdir libvpx-build &&
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115 | cd libvpx-build &&
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116 |
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117 | ../configure --prefix=/usr \
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118 | --enable-shared \
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119 | --disable-static &&
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120 | make</userinput></screen>
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121 |
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122 | <para>
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123 | To test the results, issue:
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124 | <command>LD_LIBRARY_PATH=. make test</command>.
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125 | The test suite downloads many files as part of its test process.
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126 | A few parts of it will use all available cores.
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127 | </para>
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128 |
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129 | <para>
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130 | Now, as the <systemitem class="username">root</systemitem> user:
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131 | </para>
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132 |
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133 | <screen role="root"><userinput>make install</userinput></screen>
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134 |
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135 | </sect2>
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136 |
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137 | <sect2 role="commands">
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138 | <title>Command Explanations</title>
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139 |
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140 | <para>
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141 | <command>sed ... </command>: This command
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142 | corrects ownership and permissions of installed files.
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143 | </para>
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144 |
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145 | <para>
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146 | <command>mkdir libvpx-build && cd libvpx-build</command>:
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147 | The <application>libvpx</application> developers
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148 | recommend building in a dedicated build directory.
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149 | </para>
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150 |
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151 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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152 | href="../../xincludes/static-libraries.xml"/>
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153 |
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154 | <para>
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155 | <option>--disable-vp8</option>: This switch prevents building of VP8
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156 | codec support.
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157 | </para>
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158 |
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159 | <para>
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160 | <option>--disable-vp9</option>: This switch prevents building of VP9
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161 | codec support.
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162 | </para>
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163 |
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164 | <para>
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165 | <option>--target=generic-gnu</option>: This switch disables
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166 | optimizations specific for x86 and x86-64, allowing to build this
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167 | package without <command>nasm</command> and <command>yasm</command>
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168 | installed.
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169 | </para>
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170 |
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171 | <para>
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172 | <command>LD_LIBRARY_PATH=.</command>: This is needed for the test suite
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173 | to use the library that was just built.
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174 | </para>
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175 |
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176 | </sect2>
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177 |
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178 | <sect2 role="content">
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179 | <title>Contents</title>
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180 |
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181 | <segmentedlist>
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182 | <segtitle>Installed Programs</segtitle>
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183 | <segtitle>Installed Libraries</segtitle>
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184 | <segtitle>Installed Directories</segtitle>
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185 |
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186 | <seglistitem>
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187 | <seg>vpxdec and vpxenc</seg>
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188 | <seg>libvpx.so</seg>
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189 | <seg>/usr/include/vpx</seg>
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190 | </seglistitem>
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191 | </segmentedlist>
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192 |
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193 | <variablelist>
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194 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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195 | <?dbfo list-presentation="list"?>
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196 | <?dbhtml list-presentation="table"?>
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197 |
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198 | <varlistentry id="vpxdec">
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199 | <term><command>vpxdec</command></term>
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200 | <listitem>
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201 | <para>
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202 | is the WebM Project VP8 and VP9 decoder
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203 | </para>
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204 | <indexterm zone="libvpx vpxdec">
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205 | <primary sortas="b-vpxdec">vpxdec</primary>
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206 | </indexterm>
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207 | </listitem>
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208 | </varlistentry>
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209 |
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210 | <varlistentry id="vpxenc">
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211 | <term><command>vpxenc</command></term>
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212 | <listitem>
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213 | <para>
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214 | is the WebM project VP8 and VP9 encoder
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215 | </para>
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216 | <indexterm zone="libvpx vpxenc">
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217 | <primary sortas="b-vpxenc">vpxenc</primary>
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218 | </indexterm>
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219 | </listitem>
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220 | </varlistentry>
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221 |
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222 | <varlistentry id="libvpx-lib">
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223 | <term><filename class="libraryfile">libvpx.so</filename></term>
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224 | <listitem>
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225 | <para>
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226 | provides functions to use the VP8 and VP9 video codecs
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227 | </para>
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228 | <indexterm zone="libvpx libvpx-lib">
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229 | <primary sortas="c-libvpx">libvpx.so</primary>
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230 | </indexterm>
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231 | </listitem>
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232 | </varlistentry>
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233 |
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234 | </variablelist>
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235 |
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236 | </sect2>
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237 |
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238 | </sect1>
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