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| 13 | <head>
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| 14 | <title>FFmpeg Documentation: 1. Introduction</title>
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| 15 |
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| 16 | <meta name="description" content="FFmpeg Documentation: 1. Introduction">
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| 41 | <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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| 42 |
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| 43 | <a name="SEC1"></a>
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| 44 | <table cellpadding="1" cellspacing="1" border="0">
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| 45 | <tr><td valign="middle" align="left">[ < ]</td>
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| 46 | <td valign="middle" align="left">[<a href="#SEC2" title="Next section in reading order"> > </a>]</td>
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| 47 | <td valign="middle" align="left"> </td>
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| 48 | <td valign="middle" align="left">[ << ]</td>
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| 49 | <td valign="middle" align="left">[ Up ]</td>
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| 50 | <td valign="middle" align="left">[<a href="#SEC2" title="Next chapter"> >> </a>]</td>
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| 51 | <td valign="middle" align="left"> </td>
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| 52 | <td valign="middle" align="left"> </td>
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| 53 | <td valign="middle" align="left"> </td>
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| 54 | <td valign="middle" align="left"> </td>
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| 55 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 56 | <td valign="middle" align="left">[Contents]</td>
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| 57 | <td valign="middle" align="left">[Index]</td>
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| 58 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 59 | </tr></table>
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| 60 | <h1 class="chapter"> 1. Introduction </h1>
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| 61 |
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| 62 | <p>FFmpeg is a very fast video and audio converter. It can also grab from
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| 63 | a live audio/video source.
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| 64 | </p>
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| 65 | <p>The command line interface is designed to be intuitive, in the sense
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| 66 | that FFmpeg tries to figure out all parameters that can possibly be
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| 67 | derived automatically. You usually only have to specify the target
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| 68 | bitrate you want.
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| 69 | </p>
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| 70 | <p>FFmpeg can also convert from any sample rate to any other, and resize
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| 71 | video on the fly with a high quality polyphase filter.
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| 72 | </p>
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| 73 | <hr size="6">
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| 74 | <a name="SEC2"></a>
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| 75 | <table cellpadding="1" cellspacing="1" border="0">
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| 76 | <tr><td valign="middle" align="left">[<a href="#SEC1" title="Previous section in reading order"> < </a>]</td>
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| 77 | <td valign="middle" align="left">[<a href="#SEC3" title="Next section in reading order"> > </a>]</td>
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| 78 | <td valign="middle" align="left"> </td>
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| 79 | <td valign="middle" align="left">[<a href="#SEC1" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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| 80 | <td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
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| 81 | <td valign="middle" align="left">[<a href="#SEC5" title="Next chapter"> >> </a>]</td>
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| 82 | <td valign="middle" align="left"> </td>
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| 83 | <td valign="middle" align="left"> </td>
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| 84 | <td valign="middle" align="left"> </td>
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| 85 | <td valign="middle" align="left"> </td>
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| 86 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 87 | <td valign="middle" align="left">[Contents]</td>
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| 88 | <td valign="middle" align="left">[Index]</td>
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| 89 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 90 | </tr></table>
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| 91 | <h1 class="chapter"> 2. Quick Start </h1>
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| 92 |
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| 93 | <hr size="6">
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| 94 | <a name="SEC3"></a>
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| 95 | <table cellpadding="1" cellspacing="1" border="0">
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| 96 | <tr><td valign="middle" align="left">[<a href="#SEC2" title="Previous section in reading order"> < </a>]</td>
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| 97 | <td valign="middle" align="left">[<a href="#SEC4" title="Next section in reading order"> > </a>]</td>
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| 98 | <td valign="middle" align="left"> </td>
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| 99 | <td valign="middle" align="left">[<a href="#SEC2" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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| 100 | <td valign="middle" align="left">[<a href="#SEC2" title="Up section"> Up </a>]</td>
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| 101 | <td valign="middle" align="left">[<a href="#SEC5" title="Next chapter"> >> </a>]</td>
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| 102 | <td valign="middle" align="left"> </td>
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| 103 | <td valign="middle" align="left"> </td>
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| 104 | <td valign="middle" align="left"> </td>
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| 105 | <td valign="middle" align="left"> </td>
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| 106 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 107 | <td valign="middle" align="left">[Contents]</td>
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| 108 | <td valign="middle" align="left">[Index]</td>
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| 109 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 110 | </tr></table>
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| 111 | <h2 class="section"> 2.1 Video and Audio grabbing </h2>
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| 112 |
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| 113 | <p>FFmpeg can use a video4linux compatible video source and any Open Sound
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| 114 | System audio source:
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| 115 | </p>
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| 116 | <table><tr><td> </td><td><pre class="example">ffmpeg /tmp/out.mpg
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| 117 | </pre></td></tr></table>
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| 118 | <p>Note that you must activate the right video source and channel before
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| 119 | launching FFmpeg with any TV viewer such as xawtv
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| 120 | (<a href="http://bytesex.org/xawtv/">http://bytesex.org/xawtv/</a>) by Gerd Knorr. You also
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| 121 | have to set the audio recording levels correctly with a
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| 122 | standard mixer.
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| 123 | </p>
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| 124 | <hr size="6">
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| 125 | <a name="SEC4"></a>
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| 126 | <table cellpadding="1" cellspacing="1" border="0">
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| 127 | <tr><td valign="middle" align="left">[<a href="#SEC3" title="Previous section in reading order"> < </a>]</td>
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| 128 | <td valign="middle" align="left">[<a href="#SEC5" title="Next section in reading order"> > </a>]</td>
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| 129 | <td valign="middle" align="left"> </td>
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| 130 | <td valign="middle" align="left">[<a href="#SEC2" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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| 131 | <td valign="middle" align="left">[<a href="#SEC2" title="Up section"> Up </a>]</td>
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| 132 | <td valign="middle" align="left">[<a href="#SEC5" title="Next chapter"> >> </a>]</td>
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| 133 | <td valign="middle" align="left"> </td>
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| 134 | <td valign="middle" align="left"> </td>
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| 135 | <td valign="middle" align="left"> </td>
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| 136 | <td valign="middle" align="left"> </td>
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| 137 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 138 | <td valign="middle" align="left">[Contents]</td>
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| 139 | <td valign="middle" align="left">[Index]</td>
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| 140 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 141 | </tr></table>
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| 142 | <h2 class="section"> 2.2 Video and Audio file format conversion </h2>
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| 143 |
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| 144 | <p>* FFmpeg can use any supported file format and protocol as input:
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| 145 | </p>
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| 146 | <p>Examples:
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| 147 | </p>
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| 148 | <p>* You can use YUV files as input:
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| 149 | </p>
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| 150 | <table><tr><td> </td><td><pre class="example">ffmpeg -i /tmp/test%d.Y /tmp/out.mpg
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| 151 | </pre></td></tr></table>
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| 152 | <p>It will use the files:
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| 153 | </p><table><tr><td> </td><td><pre class="example">/tmp/test0.Y, /tmp/test0.U, /tmp/test0.V,
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| 154 | /tmp/test1.Y, /tmp/test1.U, /tmp/test1.V, etc...
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| 155 | </pre></td></tr></table>
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| 156 | <p>The Y files use twice the resolution of the U and V files. They are
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| 157 | raw files, without header. They can be generated by all decent video
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| 158 | decoders. You must specify the size of the image with the <samp>`-s'</samp> option
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| 159 | if FFmpeg cannot guess it.
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| 160 | </p>
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| 161 | <p>* You can input from a raw YUV420P file:
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| 162 | </p>
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| 163 | <table><tr><td> </td><td><pre class="example">ffmpeg -i /tmp/test.yuv /tmp/out.avi
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| 164 | </pre></td></tr></table>
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| 165 | <p>test.yuv is a file containing raw YUV planar data. Each frame is composed
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| 166 | of the Y plane followed by the U and V planes at half vertical and
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| 167 | horizontal resolution.
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| 168 | </p>
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| 169 | <p>* You can output to a raw YUV420P file:
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| 170 | </p>
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| 171 | <table><tr><td> </td><td><pre class="example">ffmpeg -i mydivx.avi hugefile.yuv
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| 172 | </pre></td></tr></table>
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| 173 | <p>* You can set several input files and output files:
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| 174 | </p>
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| 175 | <table><tr><td> </td><td><pre class="example">ffmpeg -i /tmp/a.wav -s 640x480 -i /tmp/a.yuv /tmp/a.mpg
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| 176 | </pre></td></tr></table>
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| 177 | <p>Converts the audio file a.wav and the raw YUV video file a.yuv
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| 178 | to MPEG file a.mpg.
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| 179 | </p>
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| 180 | <p>* You can also do audio and video conversions at the same time:
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| 181 | </p>
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| 182 | <table><tr><td> </td><td><pre class="example">ffmpeg -i /tmp/a.wav -ar 22050 /tmp/a.mp2
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| 183 | </pre></td></tr></table>
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| 184 | <p>Converts a.wav to MPEG audio at 22050Hz sample rate.
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| 185 | </p>
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| 186 | <p>* You can encode to several formats at the same time and define a
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| 187 | mapping from input stream to output streams:
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| 188 | </p>
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| 189 | <table><tr><td> </td><td><pre class="example">ffmpeg -i /tmp/a.wav -ab 64 /tmp/a.mp2 -ab 128 /tmp/b.mp2 -map 0:0 -map 0:0
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| 190 | </pre></td></tr></table>
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| 191 | <p>Converts a.wav to a.mp2 at 64 kbits and to b.mp2 at 128 kbits. '-map
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| 192 | file:index' specifies which input stream is used for each output
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| 193 | stream, in the order of the definition of output streams.
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| 194 | </p>
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| 195 | <p>* You can transcode decrypted VOBs
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| 196 | </p>
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| 197 | <table><tr><td> </td><td><pre class="example">ffmpeg -i snatch_1.vob -f avi -vcodec mpeg4 -b 800 -g 300 -bf 2 -acodec mp3 -ab 128 snatch.avi
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| 198 | </pre></td></tr></table>
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| 199 | <p>This is a typical DVD ripping example; the input is a VOB file, the
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| 200 | output an AVI file with MPEG-4 video and MP3 audio. Note that in this
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| 201 | command we use B-frames so the MPEG-4 stream is DivX5 compatible, and
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| 202 | GOP size is 300 which means one intra frame every 10 seconds for 29.97fps
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| 203 | input video. Furthermore, the audio stream is MP3-encoded so you need
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| 204 | to enable LAME support by passing <code>--enable-mp3lame</code> to configure.
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| 205 | The mapping is particularly useful for DVD transcoding
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| 206 | to get the desired audio language.
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| 207 | </p>
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| 208 | <p>NOTE: To see the supported input formats, use <code>ffmpeg -formats</code>.
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| 209 | </p>
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| 210 | <hr size="6">
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| 211 | <a name="SEC5"></a>
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| 212 | <table cellpadding="1" cellspacing="1" border="0">
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| 213 | <tr><td valign="middle" align="left">[<a href="#SEC4" title="Previous section in reading order"> < </a>]</td>
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| 214 | <td valign="middle" align="left">[<a href="#SEC6" title="Next section in reading order"> > </a>]</td>
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| 215 | <td valign="middle" align="left"> </td>
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| 216 | <td valign="middle" align="left">[<a href="#SEC2" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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| 217 | <td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
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| 218 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
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| 219 | <td valign="middle" align="left"> </td>
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| 220 | <td valign="middle" align="left"> </td>
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| 221 | <td valign="middle" align="left"> </td>
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| 222 | <td valign="middle" align="left"> </td>
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| 223 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 224 | <td valign="middle" align="left">[Contents]</td>
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| 225 | <td valign="middle" align="left">[Index]</td>
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| 226 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 227 | </tr></table>
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| 228 | <h1 class="chapter"> 3. Invocation </h1>
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| 229 |
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| 230 | <hr size="6">
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| 231 | <a name="SEC6"></a>
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| 232 | <table cellpadding="1" cellspacing="1" border="0">
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| 233 | <tr><td valign="middle" align="left">[<a href="#SEC5" title="Previous section in reading order"> < </a>]</td>
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| 234 | <td valign="middle" align="left">[<a href="#SEC7" title="Next section in reading order"> > </a>]</td>
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| 235 | <td valign="middle" align="left"> </td>
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| 236 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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| 237 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
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| 238 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
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| 239 | <td valign="middle" align="left"> </td>
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| 240 | <td valign="middle" align="left"> </td>
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| 241 | <td valign="middle" align="left"> </td>
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| 242 | <td valign="middle" align="left"> </td>
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| 243 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 244 | <td valign="middle" align="left">[Contents]</td>
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| 245 | <td valign="middle" align="left">[Index]</td>
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| 246 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 247 | </tr></table>
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| 248 | <h2 class="section"> 3.1 Syntax </h2>
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| 249 |
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| 250 | <p>The generic syntax is:
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| 251 | </p>
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| 252 | <table><tr><td> </td><td><pre class="example">ffmpeg [[infile options][<samp>`-i'</samp> <var>infile</var>]]... {[outfile options] <var>outfile</var>}...
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| 253 | </pre></td></tr></table><p>If no input file is given, audio/video grabbing is done.
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| 254 | </p>
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| 255 | <p>As a general rule, options are applied to the next specified
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| 256 | file. For example, if you give the <samp>`-b 64'</samp> option, it sets the video
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| 257 | bitrate of the next file. The format option may be needed for raw input
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| 258 | files.
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| 259 | </p>
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| 260 | <p>By default, FFmpeg tries to convert as losslessly as possible: It
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| 261 | uses the same audio and video parameters for the outputs as the one
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| 262 | specified for the inputs.
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| 263 | </p>
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| 264 | <hr size="6">
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| 265 | <a name="SEC7"></a>
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| 266 | <table cellpadding="1" cellspacing="1" border="0">
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| 267 | <tr><td valign="middle" align="left">[<a href="#SEC6" title="Previous section in reading order"> < </a>]</td>
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| 268 | <td valign="middle" align="left">[<a href="#SEC8" title="Next section in reading order"> > </a>]</td>
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| 269 | <td valign="middle" align="left"> </td>
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| 270 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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| 271 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
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| 272 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
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| 273 | <td valign="middle" align="left"> </td>
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| 274 | <td valign="middle" align="left"> </td>
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| 275 | <td valign="middle" align="left"> </td>
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| 276 | <td valign="middle" align="left"> </td>
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| 277 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
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| 278 | <td valign="middle" align="left">[Contents]</td>
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| 279 | <td valign="middle" align="left">[Index]</td>
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| 280 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
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| 281 | </tr></table>
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| 282 | <h2 class="section"> 3.2 Main options </h2>
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| 283 |
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| 284 | <dl compact="compact">
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| 285 | <dt> <samp>`-L'</samp></dt>
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| 286 | <dd><p>Show license.
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| 287 | </p>
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| 288 | </dd>
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| 289 | <dt> <samp>`-h'</samp></dt>
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| 290 | <dd><p>Show help.
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| 291 | </p>
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| 292 | </dd>
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| 293 | <dt> <samp>`-formats'</samp></dt>
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| 294 | <dd><p>Show available formats, codecs, protocols, ...
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| 295 | </p>
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| 296 | </dd>
|
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| 297 | <dt> <samp>`-f fmt'</samp></dt>
|
|---|
| 298 | <dd><p>Force format.
|
|---|
| 299 | </p>
|
|---|
| 300 | </dd>
|
|---|
| 301 | <dt> <samp>`-i filename'</samp></dt>
|
|---|
| 302 | <dd><p>input filename
|
|---|
| 303 | </p>
|
|---|
| 304 | </dd>
|
|---|
| 305 | <dt> <samp>`-y'</samp></dt>
|
|---|
| 306 | <dd><p>Overwrite output files.
|
|---|
| 307 | </p>
|
|---|
| 308 | </dd>
|
|---|
| 309 | <dt> <samp>`-t duration'</samp></dt>
|
|---|
| 310 | <dd><p>Set the recording time in seconds.
|
|---|
| 311 | <code>hh:mm:ss[.xxx]</code> syntax is also supported.
|
|---|
| 312 | </p>
|
|---|
| 313 | </dd>
|
|---|
| 314 | <dt> <samp>`-ss position'</samp></dt>
|
|---|
| 315 | <dd><p>Seek to given time position in seconds.
|
|---|
| 316 | <code>hh:mm:ss[.xxx]</code> syntax is also supported.
|
|---|
| 317 | </p>
|
|---|
| 318 | </dd>
|
|---|
| 319 | <dt> <samp>`-title string'</samp></dt>
|
|---|
| 320 | <dd><p>Set the title.
|
|---|
| 321 | </p>
|
|---|
| 322 | </dd>
|
|---|
| 323 | <dt> <samp>`-author string'</samp></dt>
|
|---|
| 324 | <dd><p>Set the author.
|
|---|
| 325 | </p>
|
|---|
| 326 | </dd>
|
|---|
| 327 | <dt> <samp>`-copyright string'</samp></dt>
|
|---|
| 328 | <dd><p>Set the copyright.
|
|---|
| 329 | </p>
|
|---|
| 330 | </dd>
|
|---|
| 331 | <dt> <samp>`-comment string'</samp></dt>
|
|---|
| 332 | <dd><p>Set the comment.
|
|---|
| 333 | </p>
|
|---|
| 334 | </dd>
|
|---|
| 335 | <dt> <samp>`-target type'</samp></dt>
|
|---|
| 336 | <dd><p>Specify target file type ("vcd", "svcd", "dvd", "dv", "pal-vcd",
|
|---|
| 337 | "ntsc-svcd", ... ). All the format options (bitrate, codecs,
|
|---|
| 338 | buffer sizes) are then set automatically. You can just type:
|
|---|
| 339 | </p>
|
|---|
| 340 | <table><tr><td> </td><td><pre class="example">ffmpeg -i myfile.avi -target vcd /tmp/vcd.mpg
|
|---|
| 341 | </pre></td></tr></table>
|
|---|
| 342 | <p>Nevertheless you can specify additional options as long as you know
|
|---|
| 343 | they do not conflict with the standard, as in:
|
|---|
| 344 | </p>
|
|---|
| 345 | <table><tr><td> </td><td><pre class="example">ffmpeg -i myfile.avi -target vcd -bf 2 /tmp/vcd.mpg
|
|---|
| 346 | </pre></td></tr></table>
|
|---|
| 347 | </dd>
|
|---|
| 348 | <dt> <samp>`-hq'</samp></dt>
|
|---|
| 349 | <dd><p>Activate high quality settings.
|
|---|
| 350 | </p>
|
|---|
| 351 | </dd>
|
|---|
| 352 | <dt> <samp>`-itsoffset offset'</samp></dt>
|
|---|
| 353 | <dd><p>Set the input time offset in seconds.
|
|---|
| 354 | <code>[-]hh:mm:ss[.xxx]</code> syntax is also supported.
|
|---|
| 355 | This option affects all the input files that follow it.
|
|---|
| 356 | The offset is added to the timestamps of the input files.
|
|---|
| 357 | Specifying a positive offset means that the corresponding
|
|---|
| 358 | streams are delayed by 'offset' seconds.
|
|---|
| 359 | </p>
|
|---|
| 360 | </dd>
|
|---|
| 361 | </dl>
|
|---|
| 362 |
|
|---|
| 363 | <hr size="6">
|
|---|
| 364 | <a name="SEC8"></a>
|
|---|
| 365 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 366 | <tr><td valign="middle" align="left">[<a href="#SEC7" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 367 | <td valign="middle" align="left">[<a href="#SEC9" title="Next section in reading order"> > </a>]</td>
|
|---|
| 368 | <td valign="middle" align="left"> </td>
|
|---|
| 369 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 370 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 371 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 372 | <td valign="middle" align="left"> </td>
|
|---|
| 373 | <td valign="middle" align="left"> </td>
|
|---|
| 374 | <td valign="middle" align="left"> </td>
|
|---|
| 375 | <td valign="middle" align="left"> </td>
|
|---|
| 376 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 377 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 378 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 379 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 380 | </tr></table>
|
|---|
| 381 | <h2 class="section"> 3.3 Video Options </h2>
|
|---|
| 382 |
|
|---|
| 383 | <dl compact="compact">
|
|---|
| 384 | <dt> <samp>`-b bitrate'</samp></dt>
|
|---|
| 385 | <dd><p>Set the video bitrate in kbit/s (default = 200 kb/s).
|
|---|
| 386 | </p></dd>
|
|---|
| 387 | <dt> <samp>`-r fps'</samp></dt>
|
|---|
| 388 | <dd><p>Set frame rate (default = 25).
|
|---|
| 389 | </p></dd>
|
|---|
| 390 | <dt> <samp>`-s size'</samp></dt>
|
|---|
| 391 | <dd><p>Set frame size. The format is <samp>`wxh'</samp> (default = 160x128).
|
|---|
| 392 | The following abbreviations are recognized:
|
|---|
| 393 | </p><dl compact="compact">
|
|---|
| 394 | <dt> <samp>`sqcif'</samp></dt>
|
|---|
| 395 | <dd><p>128x96
|
|---|
| 396 | </p></dd>
|
|---|
| 397 | <dt> <samp>`qcif'</samp></dt>
|
|---|
| 398 | <dd><p>176x144
|
|---|
| 399 | </p></dd>
|
|---|
| 400 | <dt> <samp>`cif'</samp></dt>
|
|---|
| 401 | <dd><p>352x288
|
|---|
| 402 | </p></dd>
|
|---|
| 403 | <dt> <samp>`4cif'</samp></dt>
|
|---|
| 404 | <dd><p>704x576
|
|---|
| 405 | </p></dd>
|
|---|
| 406 | </dl>
|
|---|
| 407 |
|
|---|
| 408 | </dd>
|
|---|
| 409 | <dt> <samp>`-aspect aspect'</samp></dt>
|
|---|
| 410 | <dd><p>Set aspect ratio (4:3, 16:9 or 1.3333, 1.7777).
|
|---|
| 411 | </p></dd>
|
|---|
| 412 | <dt> <samp>`-croptop size'</samp></dt>
|
|---|
| 413 | <dd><p>Set top crop band size (in pixels).
|
|---|
| 414 | </p></dd>
|
|---|
| 415 | <dt> <samp>`-cropbottom size'</samp></dt>
|
|---|
| 416 | <dd><p>Set bottom crop band size (in pixels).
|
|---|
| 417 | </p></dd>
|
|---|
| 418 | <dt> <samp>`-cropleft size'</samp></dt>
|
|---|
| 419 | <dd><p>Set left crop band size (in pixels).
|
|---|
| 420 | </p></dd>
|
|---|
| 421 | <dt> <samp>`-cropright size'</samp></dt>
|
|---|
| 422 | <dd><p>Set right crop band size (in pixels).
|
|---|
| 423 | </p></dd>
|
|---|
| 424 | <dt> <samp>`-padtop size'</samp></dt>
|
|---|
| 425 | <dd><p>Set top pad band size (in pixels).
|
|---|
| 426 | </p></dd>
|
|---|
| 427 | <dt> <samp>`-padbottom size'</samp></dt>
|
|---|
| 428 | <dd><p>Set bottom pad band size (in pixels).
|
|---|
| 429 | </p></dd>
|
|---|
| 430 | <dt> <samp>`-padleft size'</samp></dt>
|
|---|
| 431 | <dd><p>Set left pad band size (in pixels).
|
|---|
| 432 | </p></dd>
|
|---|
| 433 | <dt> <samp>`-padright size'</samp></dt>
|
|---|
| 434 | <dd><p>Set right pad band size (in pixels).
|
|---|
| 435 | </p></dd>
|
|---|
| 436 | <dt> <samp>`-padcolor (hex color)'</samp></dt>
|
|---|
| 437 | <dd><p>Set color of padded bands. The value for padcolor is expressed
|
|---|
| 438 | as a six digit hexadecimal number where the first two digits
|
|---|
| 439 | represent red, the middle two digits green and last two digits
|
|---|
| 440 | blue (default = 000000 (black)).
|
|---|
| 441 | </p></dd>
|
|---|
| 442 | <dt> <samp>`-vn'</samp></dt>
|
|---|
| 443 | <dd><p>Disable video recording.
|
|---|
| 444 | </p></dd>
|
|---|
| 445 | <dt> <samp>`-bt tolerance'</samp></dt>
|
|---|
| 446 | <dd><p>Set video bitrate tolerance (in kbit/s).
|
|---|
| 447 | </p></dd>
|
|---|
| 448 | <dt> <samp>`-maxrate bitrate'</samp></dt>
|
|---|
| 449 | <dd><p>Set max video bitrate tolerance (in kbit/s).
|
|---|
| 450 | </p></dd>
|
|---|
| 451 | <dt> <samp>`-minrate bitrate'</samp></dt>
|
|---|
| 452 | <dd><p>Set min video bitrate tolerance (in kbit/s).
|
|---|
| 453 | </p></dd>
|
|---|
| 454 | <dt> <samp>`-bufsize size'</samp></dt>
|
|---|
| 455 | <dd><p>Set rate control buffer size (in kbit).
|
|---|
| 456 | </p></dd>
|
|---|
| 457 | <dt> <samp>`-vcodec codec'</samp></dt>
|
|---|
| 458 | <dd><p>Force video codec to <var>codec</var>. Use the <code>copy</code> special value to
|
|---|
| 459 | tell that the raw codec data must be copied as is.
|
|---|
| 460 | </p></dd>
|
|---|
| 461 | <dt> <samp>`-sameq'</samp></dt>
|
|---|
| 462 | <dd><p>Use same video quality as source (implies VBR).
|
|---|
| 463 | </p>
|
|---|
| 464 | </dd>
|
|---|
| 465 | <dt> <samp>`-pass n'</samp></dt>
|
|---|
| 466 | <dd><p>Select the pass number (1 or 2). It is useful to do two pass
|
|---|
| 467 | encoding. The statistics of the video are recorded in the first
|
|---|
| 468 | pass and the video is generated at the exact requested bitrate
|
|---|
| 469 | in the second pass.
|
|---|
| 470 | </p>
|
|---|
| 471 | </dd>
|
|---|
| 472 | <dt> <samp>`-passlogfile file'</samp></dt>
|
|---|
| 473 | <dd><p>Set two pass logfile name to <var>file</var>.
|
|---|
| 474 | </p>
|
|---|
| 475 | </dd>
|
|---|
| 476 | </dl>
|
|---|
| 477 |
|
|---|
| 478 | <hr size="6">
|
|---|
| 479 | <a name="SEC9"></a>
|
|---|
| 480 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 481 | <tr><td valign="middle" align="left">[<a href="#SEC8" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 482 | <td valign="middle" align="left">[<a href="#SEC10" title="Next section in reading order"> > </a>]</td>
|
|---|
| 483 | <td valign="middle" align="left"> </td>
|
|---|
| 484 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 485 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 486 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 487 | <td valign="middle" align="left"> </td>
|
|---|
| 488 | <td valign="middle" align="left"> </td>
|
|---|
| 489 | <td valign="middle" align="left"> </td>
|
|---|
| 490 | <td valign="middle" align="left"> </td>
|
|---|
| 491 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 492 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 493 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 494 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 495 | </tr></table>
|
|---|
| 496 | <h2 class="section"> 3.4 Advanced Video Options </h2>
|
|---|
| 497 |
|
|---|
| 498 | <dl compact="compact">
|
|---|
| 499 | <dt> <samp>`-g gop_size'</samp></dt>
|
|---|
| 500 | <dd><p>Set the group of pictures size.
|
|---|
| 501 | </p></dd>
|
|---|
| 502 | <dt> <samp>`-intra'</samp></dt>
|
|---|
| 503 | <dd><p>Use only intra frames.
|
|---|
| 504 | </p></dd>
|
|---|
| 505 | <dt> <samp>`-qscale q'</samp></dt>
|
|---|
| 506 | <dd><p>Use fixed video quantiser scale (VBR).
|
|---|
| 507 | </p></dd>
|
|---|
| 508 | <dt> <samp>`-qmin q'</samp></dt>
|
|---|
| 509 | <dd><p>minimum video quantiser scale (VBR)
|
|---|
| 510 | </p></dd>
|
|---|
| 511 | <dt> <samp>`-qmax q'</samp></dt>
|
|---|
| 512 | <dd><p>maximum video quantiser scale (VBR)
|
|---|
| 513 | </p></dd>
|
|---|
| 514 | <dt> <samp>`-qdiff q'</samp></dt>
|
|---|
| 515 | <dd><p>maximum difference between the quantiser scales (VBR)
|
|---|
| 516 | </p></dd>
|
|---|
| 517 | <dt> <samp>`-qblur blur'</samp></dt>
|
|---|
| 518 | <dd><p>video quantiser scale blur (VBR)
|
|---|
| 519 | </p></dd>
|
|---|
| 520 | <dt> <samp>`-qcomp compression'</samp></dt>
|
|---|
| 521 | <dd><p>video quantiser scale compression (VBR)
|
|---|
| 522 | </p>
|
|---|
| 523 | </dd>
|
|---|
| 524 | <dt> <samp>`-rc_init_cplx complexity'</samp></dt>
|
|---|
| 525 | <dd><p>initial complexity for single pass encoding
|
|---|
| 526 | </p></dd>
|
|---|
| 527 | <dt> <samp>`-b_qfactor factor'</samp></dt>
|
|---|
| 528 | <dd><p>qp factor between P- and B-frames
|
|---|
| 529 | </p></dd>
|
|---|
| 530 | <dt> <samp>`-i_qfactor factor'</samp></dt>
|
|---|
| 531 | <dd><p>qp factor between P- and I-frames
|
|---|
| 532 | </p></dd>
|
|---|
| 533 | <dt> <samp>`-b_qoffset offset'</samp></dt>
|
|---|
| 534 | <dd><p>qp offset between P- and B-frames
|
|---|
| 535 | </p></dd>
|
|---|
| 536 | <dt> <samp>`-i_qoffset offset'</samp></dt>
|
|---|
| 537 | <dd><p>qp offset between P- and I-frames
|
|---|
| 538 | </p></dd>
|
|---|
| 539 | <dt> <samp>`-rc_eq equation'</samp></dt>
|
|---|
| 540 | <dd><p>Set rate control equation (see section <a href="#SEC13">FFmpeg formula evaluator</a>) (default = <code>tex^qComp</code>).
|
|---|
| 541 | </p></dd>
|
|---|
| 542 | <dt> <samp>`-rc_override override'</samp></dt>
|
|---|
| 543 | <dd><p>rate control override for specific intervals
|
|---|
| 544 | </p></dd>
|
|---|
| 545 | <dt> <samp>`-me method'</samp></dt>
|
|---|
| 546 | <dd><p>Set motion estimation method to <var>method</var>.
|
|---|
| 547 | Available methods are (from lowest to best quality):
|
|---|
| 548 | </p><dl compact="compact">
|
|---|
| 549 | <dt> <samp>`zero'</samp></dt>
|
|---|
| 550 | <dd><p>Try just the (0, 0) vector.
|
|---|
| 551 | </p></dd>
|
|---|
| 552 | <dt> <samp>`phods'</samp></dt>
|
|---|
| 553 | <dt> <samp>`log'</samp></dt>
|
|---|
| 554 | <dt> <samp>`x1'</samp></dt>
|
|---|
| 555 | <dt> <samp>`epzs'</samp></dt>
|
|---|
| 556 | <dd><p>(default method)
|
|---|
| 557 | </p></dd>
|
|---|
| 558 | <dt> <samp>`full'</samp></dt>
|
|---|
| 559 | <dd><p>exhaustive search (slow and marginally better than epzs)
|
|---|
| 560 | </p></dd>
|
|---|
| 561 | </dl>
|
|---|
| 562 |
|
|---|
| 563 | </dd>
|
|---|
| 564 | <dt> <samp>`-dct_algo algo'</samp></dt>
|
|---|
| 565 | <dd><p>Set DCT algorithm to <var>algo</var>. Available values are:
|
|---|
| 566 | </p><dl compact="compact">
|
|---|
| 567 | <dt> <samp>`0'</samp></dt>
|
|---|
| 568 | <dd><p>FF_DCT_AUTO (default)
|
|---|
| 569 | </p></dd>
|
|---|
| 570 | <dt> <samp>`1'</samp></dt>
|
|---|
| 571 | <dd><p>FF_DCT_FASTINT
|
|---|
| 572 | </p></dd>
|
|---|
| 573 | <dt> <samp>`2'</samp></dt>
|
|---|
| 574 | <dd><p>FF_DCT_INT
|
|---|
| 575 | </p></dd>
|
|---|
| 576 | <dt> <samp>`3'</samp></dt>
|
|---|
| 577 | <dd><p>FF_DCT_MMX
|
|---|
| 578 | </p></dd>
|
|---|
| 579 | <dt> <samp>`4'</samp></dt>
|
|---|
| 580 | <dd><p>FF_DCT_MLIB
|
|---|
| 581 | </p></dd>
|
|---|
| 582 | <dt> <samp>`5'</samp></dt>
|
|---|
| 583 | <dd><p>FF_DCT_ALTIVEC
|
|---|
| 584 | </p></dd>
|
|---|
| 585 | </dl>
|
|---|
| 586 |
|
|---|
| 587 | </dd>
|
|---|
| 588 | <dt> <samp>`-idct_algo algo'</samp></dt>
|
|---|
| 589 | <dd><p>Set IDCT algorithm to <var>algo</var>. Available values are:
|
|---|
| 590 | </p><dl compact="compact">
|
|---|
| 591 | <dt> <samp>`0'</samp></dt>
|
|---|
| 592 | <dd><p>FF_IDCT_AUTO (default)
|
|---|
| 593 | </p></dd>
|
|---|
| 594 | <dt> <samp>`1'</samp></dt>
|
|---|
| 595 | <dd><p>FF_IDCT_INT
|
|---|
| 596 | </p></dd>
|
|---|
| 597 | <dt> <samp>`2'</samp></dt>
|
|---|
| 598 | <dd><p>FF_IDCT_SIMPLE
|
|---|
| 599 | </p></dd>
|
|---|
| 600 | <dt> <samp>`3'</samp></dt>
|
|---|
| 601 | <dd><p>FF_IDCT_SIMPLEMMX
|
|---|
| 602 | </p></dd>
|
|---|
| 603 | <dt> <samp>`4'</samp></dt>
|
|---|
| 604 | <dd><p>FF_IDCT_LIBMPEG2MMX
|
|---|
| 605 | </p></dd>
|
|---|
| 606 | <dt> <samp>`5'</samp></dt>
|
|---|
| 607 | <dd><p>FF_IDCT_PS2
|
|---|
| 608 | </p></dd>
|
|---|
| 609 | <dt> <samp>`6'</samp></dt>
|
|---|
| 610 | <dd><p>FF_IDCT_MLIB
|
|---|
| 611 | </p></dd>
|
|---|
| 612 | <dt> <samp>`7'</samp></dt>
|
|---|
| 613 | <dd><p>FF_IDCT_ARM
|
|---|
| 614 | </p></dd>
|
|---|
| 615 | <dt> <samp>`8'</samp></dt>
|
|---|
| 616 | <dd><p>FF_IDCT_ALTIVEC
|
|---|
| 617 | </p></dd>
|
|---|
| 618 | <dt> <samp>`9'</samp></dt>
|
|---|
| 619 | <dd><p>FF_IDCT_SH4
|
|---|
| 620 | </p></dd>
|
|---|
| 621 | <dt> <samp>`10'</samp></dt>
|
|---|
| 622 | <dd><p>FF_IDCT_SIMPLEARM
|
|---|
| 623 | </p></dd>
|
|---|
| 624 | </dl>
|
|---|
| 625 |
|
|---|
| 626 | </dd>
|
|---|
| 627 | <dt> <samp>`-er n'</samp></dt>
|
|---|
| 628 | <dd><p>Set error resilience to <var>n</var>.
|
|---|
| 629 | </p><dl compact="compact">
|
|---|
| 630 | <dt> <samp>`1'</samp></dt>
|
|---|
| 631 | <dd><p>FF_ER_CAREFUL (default)
|
|---|
| 632 | </p></dd>
|
|---|
| 633 | <dt> <samp>`2'</samp></dt>
|
|---|
| 634 | <dd><p>FF_ER_COMPLIANT
|
|---|
| 635 | </p></dd>
|
|---|
| 636 | <dt> <samp>`3'</samp></dt>
|
|---|
| 637 | <dd><p>FF_ER_AGGRESSIVE
|
|---|
| 638 | </p></dd>
|
|---|
| 639 | <dt> <samp>`4'</samp></dt>
|
|---|
| 640 | <dd><p>FF_ER_VERY_AGGRESSIVE
|
|---|
| 641 | </p></dd>
|
|---|
| 642 | </dl>
|
|---|
| 643 |
|
|---|
| 644 | </dd>
|
|---|
| 645 | <dt> <samp>`-ec bit_mask'</samp></dt>
|
|---|
| 646 | <dd><p>Set error concealment to <var>bit_mask</var>. <var>bit_mask</var> is a bit mask of
|
|---|
| 647 | the following values:
|
|---|
| 648 | </p><dl compact="compact">
|
|---|
| 649 | <dt> <samp>`1'</samp></dt>
|
|---|
| 650 | <dd><p>FF_EC_GUESS_MVS (default = enabled)
|
|---|
| 651 | </p></dd>
|
|---|
| 652 | <dt> <samp>`2'</samp></dt>
|
|---|
| 653 | <dd><p>FF_EC_DEBLOCK (default = enabled)
|
|---|
| 654 | </p></dd>
|
|---|
| 655 | </dl>
|
|---|
| 656 |
|
|---|
| 657 | </dd>
|
|---|
| 658 | <dt> <samp>`-bf frames'</samp></dt>
|
|---|
| 659 | <dd><p>Use 'frames' B-frames (supported for MPEG-1, MPEG-2 and MPEG-4).
|
|---|
| 660 | </p></dd>
|
|---|
| 661 | <dt> <samp>`-mbd mode'</samp></dt>
|
|---|
| 662 | <dd><p>macroblock decision
|
|---|
| 663 | </p><dl compact="compact">
|
|---|
| 664 | <dt> <samp>`0'</samp></dt>
|
|---|
| 665 | <dd><p>FF_MB_DECISION_SIMPLE: Use mb_cmp (cannot change it yet in FFmpeg).
|
|---|
| 666 | </p></dd>
|
|---|
| 667 | <dt> <samp>`1'</samp></dt>
|
|---|
| 668 | <dd><p>FF_MB_DECISION_BITS: Choose the one which needs the fewest bits.
|
|---|
| 669 | </p></dd>
|
|---|
| 670 | <dt> <samp>`2'</samp></dt>
|
|---|
| 671 | <dd><p>FF_MB_DECISION_RD: rate distortion
|
|---|
| 672 | </p></dd>
|
|---|
| 673 | </dl>
|
|---|
| 674 |
|
|---|
| 675 | </dd>
|
|---|
| 676 | <dt> <samp>`-4mv'</samp></dt>
|
|---|
| 677 | <dd><p>Use four motion vector by macroblock (MPEG-4 only).
|
|---|
| 678 | </p></dd>
|
|---|
| 679 | <dt> <samp>`-part'</samp></dt>
|
|---|
| 680 | <dd><p>Use data partitioning (MPEG-4 only).
|
|---|
| 681 | </p></dd>
|
|---|
| 682 | <dt> <samp>`-bug param'</samp></dt>
|
|---|
| 683 | <dd><p>Work around encoder bugs that are not auto-detected.
|
|---|
| 684 | </p></dd>
|
|---|
| 685 | <dt> <samp>`-strict strictness'</samp></dt>
|
|---|
| 686 | <dd><p>How strictly to follow the standards.
|
|---|
| 687 | </p></dd>
|
|---|
| 688 | <dt> <samp>`-aic'</samp></dt>
|
|---|
| 689 | <dd><p>Enable Advanced intra coding (h263+).
|
|---|
| 690 | </p></dd>
|
|---|
| 691 | <dt> <samp>`-umv'</samp></dt>
|
|---|
| 692 | <dd><p>Enable Unlimited Motion Vector (h263+)
|
|---|
| 693 | </p>
|
|---|
| 694 | </dd>
|
|---|
| 695 | <dt> <samp>`-deinterlace'</samp></dt>
|
|---|
| 696 | <dd><p>Deinterlace pictures.
|
|---|
| 697 | </p></dd>
|
|---|
| 698 | <dt> <samp>`-interlace'</samp></dt>
|
|---|
| 699 | <dd><p>Force interlacing support in encoder (MPEG-2 and MPEG-4 only).
|
|---|
| 700 | Use this option if your input file is interlaced and you want
|
|---|
| 701 | to keep the interlaced format for minimum losses.
|
|---|
| 702 | The alternative is to deinterlace the input stream with
|
|---|
| 703 | <samp>`-deinterlace'</samp>, but deinterlacing introduces losses.
|
|---|
| 704 | </p></dd>
|
|---|
| 705 | <dt> <samp>`-psnr'</samp></dt>
|
|---|
| 706 | <dd><p>Calculate PSNR of compressed frames.
|
|---|
| 707 | </p></dd>
|
|---|
| 708 | <dt> <samp>`-vstats'</samp></dt>
|
|---|
| 709 | <dd><p>Dump video coding statistics to <tt>`vstats_HHMMSS.log'</tt>.
|
|---|
| 710 | </p></dd>
|
|---|
| 711 | <dt> <samp>`-vhook module'</samp></dt>
|
|---|
| 712 | <dd><p>Insert video processing <var>module</var>. <var>module</var> contains the module
|
|---|
| 713 | name and its parameters separated by spaces.
|
|---|
| 714 | </p></dd>
|
|---|
| 715 | </dl>
|
|---|
| 716 |
|
|---|
| 717 | <hr size="6">
|
|---|
| 718 | <a name="SEC10"></a>
|
|---|
| 719 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 720 | <tr><td valign="middle" align="left">[<a href="#SEC9" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 721 | <td valign="middle" align="left">[<a href="#SEC11" title="Next section in reading order"> > </a>]</td>
|
|---|
| 722 | <td valign="middle" align="left"> </td>
|
|---|
| 723 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 724 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 725 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 726 | <td valign="middle" align="left"> </td>
|
|---|
| 727 | <td valign="middle" align="left"> </td>
|
|---|
| 728 | <td valign="middle" align="left"> </td>
|
|---|
| 729 | <td valign="middle" align="left"> </td>
|
|---|
| 730 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 731 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 732 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 733 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 734 | </tr></table>
|
|---|
| 735 | <h2 class="section"> 3.5 Audio Options </h2>
|
|---|
| 736 |
|
|---|
| 737 | <dl compact="compact">
|
|---|
| 738 | <dt> <samp>`-ar freq'</samp></dt>
|
|---|
| 739 | <dd><p>Set the audio sampling frequency (default = 44100 Hz).
|
|---|
| 740 | </p></dd>
|
|---|
| 741 | <dt> <samp>`-ab bitrate'</samp></dt>
|
|---|
| 742 | <dd><p>Set the audio bitrate in kbit/s (default = 64).
|
|---|
| 743 | </p></dd>
|
|---|
| 744 | <dt> <samp>`-ac channels'</samp></dt>
|
|---|
| 745 | <dd><p>Set the number of audio channels (default = 1).
|
|---|
| 746 | </p></dd>
|
|---|
| 747 | <dt> <samp>`-an'</samp></dt>
|
|---|
| 748 | <dd><p>Disable audio recording.
|
|---|
| 749 | </p></dd>
|
|---|
| 750 | <dt> <samp>`-acodec codec'</samp></dt>
|
|---|
| 751 | <dd><p>Force audio codec to <var>codec</var>. Use the <code>copy</code> special value to
|
|---|
| 752 | specify that the raw codec data must be copied as is.
|
|---|
| 753 | </p></dd>
|
|---|
| 754 | </dl>
|
|---|
| 755 |
|
|---|
| 756 | <hr size="6">
|
|---|
| 757 | <a name="SEC11"></a>
|
|---|
| 758 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 759 | <tr><td valign="middle" align="left">[<a href="#SEC10" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 760 | <td valign="middle" align="left">[<a href="#SEC12" title="Next section in reading order"> > </a>]</td>
|
|---|
| 761 | <td valign="middle" align="left"> </td>
|
|---|
| 762 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 763 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 764 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 765 | <td valign="middle" align="left"> </td>
|
|---|
| 766 | <td valign="middle" align="left"> </td>
|
|---|
| 767 | <td valign="middle" align="left"> </td>
|
|---|
| 768 | <td valign="middle" align="left"> </td>
|
|---|
| 769 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 770 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 771 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 772 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 773 | </tr></table>
|
|---|
| 774 | <h2 class="section"> 3.6 Audio/Video grab options </h2>
|
|---|
| 775 |
|
|---|
| 776 | <dl compact="compact">
|
|---|
| 777 | <dt> <samp>`-vd device'</samp></dt>
|
|---|
| 778 | <dd><p>sEt video grab device (e.g. <tt>`/dev/video0'</tt>).
|
|---|
| 779 | </p></dd>
|
|---|
| 780 | <dt> <samp>`-vc channel'</samp></dt>
|
|---|
| 781 | <dd><p>Set video grab channel (DV1394 only).
|
|---|
| 782 | </p></dd>
|
|---|
| 783 | <dt> <samp>`-tvstd standard'</samp></dt>
|
|---|
| 784 | <dd><p>Set television standard (NTSC, PAL (SECAM)).
|
|---|
| 785 | </p></dd>
|
|---|
| 786 | <dt> <samp>`-dv1394'</samp></dt>
|
|---|
| 787 | <dd><p>Set DV1394 grab.
|
|---|
| 788 | </p></dd>
|
|---|
| 789 | <dt> <samp>`-ad device'</samp></dt>
|
|---|
| 790 | <dd><p>Set audio device (e.g. <tt>`/dev/dsp'</tt>).
|
|---|
| 791 | </p></dd>
|
|---|
| 792 | </dl>
|
|---|
| 793 |
|
|---|
| 794 | <hr size="6">
|
|---|
| 795 | <a name="SEC12"></a>
|
|---|
| 796 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 797 | <tr><td valign="middle" align="left">[<a href="#SEC11" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 798 | <td valign="middle" align="left">[<a href="#SEC13" title="Next section in reading order"> > </a>]</td>
|
|---|
| 799 | <td valign="middle" align="left"> </td>
|
|---|
| 800 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 801 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 802 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 803 | <td valign="middle" align="left"> </td>
|
|---|
| 804 | <td valign="middle" align="left"> </td>
|
|---|
| 805 | <td valign="middle" align="left"> </td>
|
|---|
| 806 | <td valign="middle" align="left"> </td>
|
|---|
| 807 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 808 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 809 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 810 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 811 | </tr></table>
|
|---|
| 812 | <h2 class="section"> 3.7 Advanced options </h2>
|
|---|
| 813 |
|
|---|
| 814 | <dl compact="compact">
|
|---|
| 815 | <dt> <samp>`-map file:stream'</samp></dt>
|
|---|
| 816 | <dd><p>Set input stream mapping.
|
|---|
| 817 | </p></dd>
|
|---|
| 818 | <dt> <samp>`-debug'</samp></dt>
|
|---|
| 819 | <dd><p>Print specific debug info.
|
|---|
| 820 | </p></dd>
|
|---|
| 821 | <dt> <samp>`-benchmark'</samp></dt>
|
|---|
| 822 | <dd><p>Add timings for benchmarking.
|
|---|
| 823 | </p></dd>
|
|---|
| 824 | <dt> <samp>`-hex'</samp></dt>
|
|---|
| 825 | <dd><p>Dump each input packet.
|
|---|
| 826 | </p></dd>
|
|---|
| 827 | <dt> <samp>`-bitexact'</samp></dt>
|
|---|
| 828 | <dd><p>Only use bit exact algorithms (for codec testing).
|
|---|
| 829 | </p></dd>
|
|---|
| 830 | <dt> <samp>`-ps size'</samp></dt>
|
|---|
| 831 | <dd><p>Set packet size in bits.
|
|---|
| 832 | </p></dd>
|
|---|
| 833 | <dt> <samp>`-re'</samp></dt>
|
|---|
| 834 | <dd><p>Read input at native frame rate. Mainly used to simulate a grab device.
|
|---|
| 835 | </p></dd>
|
|---|
| 836 | <dt> <samp>`-loop'</samp></dt>
|
|---|
| 837 | <dd><p>Loop over the input stream. Currently it works only for image
|
|---|
| 838 | streams. This option is used for automatic FFserver testing.
|
|---|
| 839 | </p></dd>
|
|---|
| 840 | <dt> <samp>`-loop_output number_of_times'</samp></dt>
|
|---|
| 841 | <dd><p>Repeatedly loop output for formats that support looping such as animated GIF
|
|---|
| 842 | (0 will loop the output infinitely).
|
|---|
| 843 | </p></dd>
|
|---|
| 844 | </dl>
|
|---|
| 845 |
|
|---|
| 846 | <hr size="6">
|
|---|
| 847 | <a name="FFmpeg-formula-evaluator"></a>
|
|---|
| 848 | <a name="SEC13"></a>
|
|---|
| 849 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 850 | <tr><td valign="middle" align="left">[<a href="#SEC12" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 851 | <td valign="middle" align="left">[<a href="#SEC14" title="Next section in reading order"> > </a>]</td>
|
|---|
| 852 | <td valign="middle" align="left"> </td>
|
|---|
| 853 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 854 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 855 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 856 | <td valign="middle" align="left"> </td>
|
|---|
| 857 | <td valign="middle" align="left"> </td>
|
|---|
| 858 | <td valign="middle" align="left"> </td>
|
|---|
| 859 | <td valign="middle" align="left"> </td>
|
|---|
| 860 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 861 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 862 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 863 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 864 | </tr></table>
|
|---|
| 865 | <h2 class="section"> 3.8 FFmpeg formula evaluator </h2>
|
|---|
| 866 |
|
|---|
| 867 | <p>When evaluating a rate control string, FFmpeg uses an internal formula
|
|---|
| 868 | evaluator.
|
|---|
| 869 | </p>
|
|---|
| 870 | <p>The following binary operators are available: <code>+</code>, <code>-</code>,
|
|---|
| 871 | <code>*</code>, <code>/</code>, <code>^</code>.
|
|---|
| 872 | </p>
|
|---|
| 873 | <p>The following unary operators are available: <code>+</code>, <code>-</code>,
|
|---|
| 874 | <code>(...)</code>.
|
|---|
| 875 | </p>
|
|---|
| 876 | <p>The following functions are available:
|
|---|
| 877 | </p><dl compact="compact">
|
|---|
| 878 | <dt> <var>sinh(x)</var></dt>
|
|---|
| 879 | <dt> <var>cosh(x)</var></dt>
|
|---|
| 880 | <dt> <var>tanh(x)</var></dt>
|
|---|
| 881 | <dt> <var>sin(x)</var></dt>
|
|---|
| 882 | <dt> <var>cos(x)</var></dt>
|
|---|
| 883 | <dt> <var>tan(x)</var></dt>
|
|---|
| 884 | <dt> <var>exp(x)</var></dt>
|
|---|
| 885 | <dt> <var>log(x)</var></dt>
|
|---|
| 886 | <dt> <var>squish(x)</var></dt>
|
|---|
| 887 | <dt> <var>gauss(x)</var></dt>
|
|---|
| 888 | <dt> <var>abs(x)</var></dt>
|
|---|
| 889 | <dt> <var>max(x, y)</var></dt>
|
|---|
| 890 | <dt> <var>min(x, y)</var></dt>
|
|---|
| 891 | <dt> <var>gt(x, y)</var></dt>
|
|---|
| 892 | <dt> <var>lt(x, y)</var></dt>
|
|---|
| 893 | <dt> <var>eq(x, y)</var></dt>
|
|---|
| 894 | <dt> <var>bits2qp(bits)</var></dt>
|
|---|
| 895 | <dt> <var>qp2bits(qp)</var></dt>
|
|---|
| 896 | </dl>
|
|---|
| 897 |
|
|---|
| 898 | <p>The following constants are available:
|
|---|
| 899 | </p><dl compact="compact">
|
|---|
| 900 | <dt> <var>PI</var></dt>
|
|---|
| 901 | <dt> <var>E</var></dt>
|
|---|
| 902 | <dt> <var>iTex</var></dt>
|
|---|
| 903 | <dt> <var>pTex</var></dt>
|
|---|
| 904 | <dt> <var>tex</var></dt>
|
|---|
| 905 | <dt> <var>mv</var></dt>
|
|---|
| 906 | <dt> <var>fCode</var></dt>
|
|---|
| 907 | <dt> <var>iCount</var></dt>
|
|---|
| 908 | <dt> <var>mcVar</var></dt>
|
|---|
| 909 | <dt> <var>var</var></dt>
|
|---|
| 910 | <dt> <var>isI</var></dt>
|
|---|
| 911 | <dt> <var>isP</var></dt>
|
|---|
| 912 | <dt> <var>isB</var></dt>
|
|---|
| 913 | <dt> <var>avgQP</var></dt>
|
|---|
| 914 | <dt> <var>qComp</var></dt>
|
|---|
| 915 | <dt> <var>avgIITex</var></dt>
|
|---|
| 916 | <dt> <var>avgPITex</var></dt>
|
|---|
| 917 | <dt> <var>avgPPTex</var></dt>
|
|---|
| 918 | <dt> <var>avgBPTex</var></dt>
|
|---|
| 919 | <dt> <var>avgTex</var></dt>
|
|---|
| 920 | </dl>
|
|---|
| 921 |
|
|---|
| 922 |
|
|---|
| 923 |
|
|---|
| 924 | <hr size="6">
|
|---|
| 925 | <a name="SEC14"></a>
|
|---|
| 926 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 927 | <tr><td valign="middle" align="left">[<a href="#SEC13" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 928 | <td valign="middle" align="left">[<a href="#SEC15" title="Next section in reading order"> > </a>]</td>
|
|---|
| 929 | <td valign="middle" align="left"> </td>
|
|---|
| 930 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 931 | <td valign="middle" align="left">[<a href="#SEC5" title="Up section"> Up </a>]</td>
|
|---|
| 932 | <td valign="middle" align="left">[<a href="#SEC15" title="Next chapter"> >> </a>]</td>
|
|---|
| 933 | <td valign="middle" align="left"> </td>
|
|---|
| 934 | <td valign="middle" align="left"> </td>
|
|---|
| 935 | <td valign="middle" align="left"> </td>
|
|---|
| 936 | <td valign="middle" align="left"> </td>
|
|---|
| 937 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 938 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 939 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 940 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 941 | </tr></table>
|
|---|
| 942 | <h2 class="section"> 3.9 Protocols </h2>
|
|---|
| 943 |
|
|---|
| 944 | <p>The filename can be <tt>`-'</tt> to read from standard input or to write
|
|---|
| 945 | to standard output.
|
|---|
| 946 | </p>
|
|---|
| 947 | <p>FFmpeg also handles many protocols specified with an URL syntax.
|
|---|
| 948 | </p>
|
|---|
| 949 | <p>Use 'ffmpeg -formats' to see a list of the supported protocols.
|
|---|
| 950 | </p>
|
|---|
| 951 | <p>The protocol <code>http:</code> is currently used only to communicate with
|
|---|
| 952 | FFserver (see the FFserver documentation). When FFmpeg will be a
|
|---|
| 953 | video player it will also be used for streaming :-)
|
|---|
| 954 | </p>
|
|---|
| 955 | <hr size="6">
|
|---|
| 956 | <a name="SEC15"></a>
|
|---|
| 957 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 958 | <tr><td valign="middle" align="left">[<a href="#SEC14" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 959 | <td valign="middle" align="left">[<a href="#SEC16" title="Next section in reading order"> > </a>]</td>
|
|---|
| 960 | <td valign="middle" align="left"> </td>
|
|---|
| 961 | <td valign="middle" align="left">[<a href="#SEC5" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 962 | <td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
|
|---|
| 963 | <td valign="middle" align="left">[<a href="#SEC16" title="Next chapter"> >> </a>]</td>
|
|---|
| 964 | <td valign="middle" align="left"> </td>
|
|---|
| 965 | <td valign="middle" align="left"> </td>
|
|---|
| 966 | <td valign="middle" align="left"> </td>
|
|---|
| 967 | <td valign="middle" align="left"> </td>
|
|---|
| 968 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 969 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 970 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 971 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 972 | </tr></table>
|
|---|
| 973 | <h1 class="chapter"> 4. Tips </h1>
|
|---|
| 974 |
|
|---|
| 975 | <ul class="toc">
|
|---|
| 976 | <li> For streaming at very low bitrate application, use a low frame rate
|
|---|
| 977 | and a small GOP size. This is especially true for RealVideo where
|
|---|
| 978 | the Linux player does not seem to be very fast, so it can miss
|
|---|
| 979 | frames. An example is:
|
|---|
| 980 |
|
|---|
| 981 | <table><tr><td> </td><td><pre class="example">ffmpeg -g 3 -r 3 -t 10 -b 50 -s qcif -f rv10 /tmp/b.rm
|
|---|
| 982 | </pre></td></tr></table>
|
|---|
| 983 | </li><li> The parameter 'q' which is displayed while encoding is the current
|
|---|
| 984 | quantizer. The value 1 indicates that a very good quality could
|
|---|
| 985 | be achieved. The value 31 indicates the worst quality. If q=31 appears
|
|---|
| 986 | too often, it means that the encoder cannot compress enough to meet
|
|---|
| 987 | your bitrate. You must either increase the bitrate, decrease the
|
|---|
| 988 | frame rate or decrease the frame size.
|
|---|
| 989 |
|
|---|
| 990 | </li><li> If your computer is not fast enough, you can speed up the
|
|---|
| 991 | compression at the expense of the compression ratio. You can use
|
|---|
| 992 | '-me zero' to speed up motion estimation, and '-intra' to disable
|
|---|
| 993 | motion estimation completely (you have only I-frames, which means it
|
|---|
| 994 | is about as good as JPEG compression).
|
|---|
| 995 |
|
|---|
| 996 | </li><li> To have very low audio bitrates, reduce the sampling frequency
|
|---|
| 997 | (down to 22050 kHz for MPEG audio, 22050 or 11025 for AC3).
|
|---|
| 998 |
|
|---|
| 999 | </li><li> To have a constant quality (but a variable bitrate), use the option
|
|---|
| 1000 | '-qscale n' when 'n' is between 1 (excellent quality) and 31 (worst
|
|---|
| 1001 | quality).
|
|---|
| 1002 |
|
|---|
| 1003 | </li><li> When converting video files, you can use the '-sameq' option which
|
|---|
| 1004 | uses the same quality factor in the encoder as in the decoder.
|
|---|
| 1005 | It allows almost lossless encoding.
|
|---|
| 1006 |
|
|---|
| 1007 | </li></ul>
|
|---|
| 1008 |
|
|---|
| 1009 | <hr size="6">
|
|---|
| 1010 | <a name="SEC16"></a>
|
|---|
| 1011 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1012 | <tr><td valign="middle" align="left">[<a href="#SEC15" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1013 | <td valign="middle" align="left">[<a href="#SEC17" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1014 | <td valign="middle" align="left"> </td>
|
|---|
| 1015 | <td valign="middle" align="left">[<a href="#SEC15" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1016 | <td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
|
|---|
| 1017 | <td valign="middle" align="left">[<a href="#SEC21" title="Next chapter"> >> </a>]</td>
|
|---|
| 1018 | <td valign="middle" align="left"> </td>
|
|---|
| 1019 | <td valign="middle" align="left"> </td>
|
|---|
| 1020 | <td valign="middle" align="left"> </td>
|
|---|
| 1021 | <td valign="middle" align="left"> </td>
|
|---|
| 1022 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1023 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1024 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1025 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1026 | </tr></table>
|
|---|
| 1027 | <h1 class="chapter"> 5. Supported File Formats and Codecs </h1>
|
|---|
| 1028 |
|
|---|
| 1029 | <p>You can use the <code>-formats</code> option to have an exhaustive list.
|
|---|
| 1030 | </p>
|
|---|
| 1031 | <hr size="6">
|
|---|
| 1032 | <a name="SEC17"></a>
|
|---|
| 1033 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1034 | <tr><td valign="middle" align="left">[<a href="#SEC16" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1035 | <td valign="middle" align="left">[<a href="#SEC18" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1036 | <td valign="middle" align="left"> </td>
|
|---|
| 1037 | <td valign="middle" align="left">[<a href="#SEC16" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1038 | <td valign="middle" align="left">[<a href="#SEC16" title="Up section"> Up </a>]</td>
|
|---|
| 1039 | <td valign="middle" align="left">[<a href="#SEC21" title="Next chapter"> >> </a>]</td>
|
|---|
| 1040 | <td valign="middle" align="left"> </td>
|
|---|
| 1041 | <td valign="middle" align="left"> </td>
|
|---|
| 1042 | <td valign="middle" align="left"> </td>
|
|---|
| 1043 | <td valign="middle" align="left"> </td>
|
|---|
| 1044 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1045 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1046 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1047 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1048 | </tr></table>
|
|---|
| 1049 | <h2 class="section"> 5.1 File Formats </h2>
|
|---|
| 1050 |
|
|---|
| 1051 | <p>FFmpeg supports the following file formats through the <code>libavformat</code>
|
|---|
| 1052 | library:
|
|---|
| 1053 | </p>
|
|---|
| 1054 | <table>
|
|---|
| 1055 | <tr><td><p> Supported File Format </p></td><td><p> Encoding </p></td><td><p> Decoding </p></td><td><p> Comments
|
|---|
| 1056 | </p></td></tr>
|
|---|
| 1057 | <tr><td><p> MPEG audio </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1058 | </p></td></tr>
|
|---|
| 1059 | <tr><td><p> MPEG-1 systems </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1060 | </p></td><td><p> muxed audio and video
|
|---|
| 1061 | </p></td></tr>
|
|---|
| 1062 | <tr><td><p> MPEG-2 PS </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1063 | </p></td><td><p> also known as <code>VOB</code> file
|
|---|
| 1064 | </p></td></tr>
|
|---|
| 1065 | <tr><td><p> MPEG-2 TS </p></td><td> </td><td><p> X
|
|---|
| 1066 | </p></td><td><p> also known as DVB Transport Stream
|
|---|
| 1067 | </p></td></tr>
|
|---|
| 1068 | <tr><td><p> ASF</p></td><td><p> X </p></td><td><p> X
|
|---|
| 1069 | </p></td></tr>
|
|---|
| 1070 | <tr><td><p> AVI</p></td><td><p> X </p></td><td><p> X
|
|---|
| 1071 | </p></td></tr>
|
|---|
| 1072 | <tr><td><p> WAV</p></td><td><p> X </p></td><td><p> X
|
|---|
| 1073 | </p></td></tr>
|
|---|
| 1074 | <tr><td><p> Macromedia Flash</p></td><td><p> X </p></td><td><p> X
|
|---|
| 1075 | </p></td><td><p> Only embedded audio is decoded.
|
|---|
| 1076 | </p></td></tr>
|
|---|
| 1077 | <tr><td><p> FLV </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1078 | </p></td><td><p> Macromedia Flash video files
|
|---|
| 1079 | </p></td></tr>
|
|---|
| 1080 | <tr><td><p> Real Audio and Video </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1081 | </p></td></tr>
|
|---|
| 1082 | <tr><td><p> Raw AC3 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1083 | </p></td></tr>
|
|---|
| 1084 | <tr><td><p> Raw MJPEG </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1085 | </p></td></tr>
|
|---|
| 1086 | <tr><td><p> Raw MPEG video </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1087 | </p></td></tr>
|
|---|
| 1088 | <tr><td><p> Raw PCM8/16 bits, mulaw/Alaw</p></td><td><p> X </p></td><td><p> X
|
|---|
| 1089 | </p></td></tr>
|
|---|
| 1090 | <tr><td><p> Raw CRI ADX audio </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1091 | </p></td></tr>
|
|---|
| 1092 | <tr><td><p> Raw Shorten audio </p></td><td> </td><td><p> X
|
|---|
| 1093 | </p></td></tr>
|
|---|
| 1094 | <tr><td><p> SUN AU format </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1095 | </p></td></tr>
|
|---|
| 1096 | <tr><td><p> NUT </p></td><td><p> X </p></td><td><p> X </p></td><td><p> NUT Open Container Format
|
|---|
| 1097 | </p></td></tr>
|
|---|
| 1098 | <tr><td><p> QuickTime </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1099 | </p></td></tr>
|
|---|
| 1100 | <tr><td><p> MPEG-4 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1101 | </p></td><td><p> MPEG-4 is a variant of QuickTime.
|
|---|
| 1102 | </p></td></tr>
|
|---|
| 1103 | <tr><td><p> Raw MPEG4 video </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1104 | </p></td></tr>
|
|---|
| 1105 | <tr><td><p> DV </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1106 | </p></td></tr>
|
|---|
| 1107 | <tr><td><p> 4xm </p></td><td> </td><td><p> X
|
|---|
| 1108 | </p></td><td><p> 4X Technologies format, used in some games.
|
|---|
| 1109 | </p></td></tr>
|
|---|
| 1110 | <tr><td><p> Playstation STR </p></td><td> </td><td><p> X
|
|---|
| 1111 | </p></td></tr>
|
|---|
| 1112 | <tr><td><p> Id RoQ </p></td><td> </td><td><p> X
|
|---|
| 1113 | </p></td><td><p> Used in Quake III, Jedi Knight 2, other computer games.
|
|---|
| 1114 | </p></td></tr>
|
|---|
| 1115 | <tr><td><p> Interplay MVE </p></td><td> </td><td><p> X
|
|---|
| 1116 | </p></td><td><p> Format used in various Interplay computer games.
|
|---|
| 1117 | </p></td></tr>
|
|---|
| 1118 | <tr><td><p> WC3 Movie </p></td><td> </td><td><p> X
|
|---|
| 1119 | </p></td><td><p> Multimedia format used in Origin's Wing Commander III computer game.
|
|---|
| 1120 | </p></td></tr>
|
|---|
| 1121 | <tr><td><p> Sega FILM/CPK </p></td><td> </td><td><p> X
|
|---|
| 1122 | </p></td><td><p> Used in many Sega Saturn console games.
|
|---|
| 1123 | </p></td></tr>
|
|---|
| 1124 | <tr><td><p> Westwood Studios VQA/AUD </p></td><td> </td><td><p> X
|
|---|
| 1125 | </p></td><td><p> Multimedia formats used in Westwood Studios games.
|
|---|
| 1126 | </p></td></tr>
|
|---|
| 1127 | <tr><td><p> Id Cinematic (.cin) </p></td><td> </td><td><p> X
|
|---|
| 1128 | </p></td><td><p> Used in Quake II.
|
|---|
| 1129 | </p></td></tr>
|
|---|
| 1130 | <tr><td><p> FLIC format </p></td><td> </td><td><p> X
|
|---|
| 1131 | </p></td><td><p> .fli/.flc files
|
|---|
| 1132 | </p></td></tr>
|
|---|
| 1133 | <tr><td><p> Sierra VMD </p></td><td> </td><td><p> X
|
|---|
| 1134 | </p></td><td><p> Used in Sierra CD-ROM games.
|
|---|
| 1135 | </p></td></tr>
|
|---|
| 1136 | <tr><td><p> Sierra Online </p></td><td> </td><td><p> X
|
|---|
| 1137 | </p></td><td><p> .sol files used in Sierra Online games.
|
|---|
| 1138 | </p></td></tr>
|
|---|
| 1139 | <tr><td><p> Matroska </p></td><td> </td><td><p> X
|
|---|
| 1140 | </p></td></tr>
|
|---|
| 1141 | <tr><td><p> Electronic Arts Multimedia </p></td><td> </td><td><p> X
|
|---|
| 1142 | </p></td><td><p> Used in various EA games; files have extensions like WVE and UV2.
|
|---|
| 1143 | </p></td></tr>
|
|---|
| 1144 | <tr><td><p> Nullsoft Video (NSV) format </p></td><td> </td><td><p> X
|
|---|
| 1145 | </p></td></tr>
|
|---|
| 1146 | <tr><td><p> ADTS AAC audio </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1147 | </p></td></tr>
|
|---|
| 1148 | <tr><td><p> Creative VOC </p></td><td><p> X </p></td><td><p> X </p></td><td><p> Created for the Sound Blaster Pro.
|
|---|
| 1149 | </p></td></tr>
|
|---|
| 1150 | <tr><td><p> American Laser Games MM </p></td><td> </td><td><p> X
|
|---|
| 1151 | </p></td><td><p> Multimedia format used in games like Mad Dog McCree
|
|---|
| 1152 | </p></td></tr>
|
|---|
| 1153 | <tr><td><p> AVS </p></td><td> </td><td><p> X
|
|---|
| 1154 | </p></td><td><p> Multimedia format used by the Creature Shock game.
|
|---|
| 1155 | </p></td></tr>
|
|---|
| 1156 | <tr><td><p> Smacker </p></td><td> </td><td><p> X
|
|---|
| 1157 | </p></td><td><p> Multimedia format used by many games.
|
|---|
| 1158 | </p></td></tr>
|
|---|
| 1159 | </table>
|
|---|
| 1160 |
|
|---|
| 1161 | <p><code>X</code> means that encoding (resp. decoding) is supported.
|
|---|
| 1162 | </p>
|
|---|
| 1163 | <hr size="6">
|
|---|
| 1164 | <a name="SEC18"></a>
|
|---|
| 1165 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1166 | <tr><td valign="middle" align="left">[<a href="#SEC17" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1167 | <td valign="middle" align="left">[<a href="#SEC19" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1168 | <td valign="middle" align="left"> </td>
|
|---|
| 1169 | <td valign="middle" align="left">[<a href="#SEC16" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1170 | <td valign="middle" align="left">[<a href="#SEC16" title="Up section"> Up </a>]</td>
|
|---|
| 1171 | <td valign="middle" align="left">[<a href="#SEC21" title="Next chapter"> >> </a>]</td>
|
|---|
| 1172 | <td valign="middle" align="left"> </td>
|
|---|
| 1173 | <td valign="middle" align="left"> </td>
|
|---|
| 1174 | <td valign="middle" align="left"> </td>
|
|---|
| 1175 | <td valign="middle" align="left"> </td>
|
|---|
| 1176 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1177 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1178 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1179 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1180 | </tr></table>
|
|---|
| 1181 | <h2 class="section"> 5.2 Image Formats </h2>
|
|---|
| 1182 |
|
|---|
| 1183 | <p>FFmpeg can read and write images for each frame of a video sequence. The
|
|---|
| 1184 | following image formats are supported:
|
|---|
| 1185 | </p>
|
|---|
| 1186 | <table>
|
|---|
| 1187 | <tr><td><p> Supported Image Format </p></td><td><p> Encoding </p></td><td><p> Decoding </p></td><td><p> Comments
|
|---|
| 1188 | </p></td></tr>
|
|---|
| 1189 | <tr><td><p> PGM, PPM </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1190 | </p></td></tr>
|
|---|
| 1191 | <tr><td><p> PAM </p></td><td><p> X </p></td><td><p> X </p></td><td><p> PAM is a PNM extension with alpha support.
|
|---|
| 1192 | </p></td></tr>
|
|---|
| 1193 | <tr><td><p> PGMYUV </p></td><td><p> X </p></td><td><p> X </p></td><td><p> PGM with U and V components in YUV 4:2:0
|
|---|
| 1194 | </p></td></tr>
|
|---|
| 1195 | <tr><td><p> JPEG </p></td><td><p> X </p></td><td><p> X </p></td><td><p> Progressive JPEG is not supported.
|
|---|
| 1196 | </p></td></tr>
|
|---|
| 1197 | <tr><td><p> .Y.U.V </p></td><td><p> X </p></td><td><p> X </p></td><td><p> one raw file per component
|
|---|
| 1198 | </p></td></tr>
|
|---|
| 1199 | <tr><td><p> animated GIF </p></td><td><p> X </p></td><td><p> X </p></td><td><p> Only uncompressed GIFs are generated.
|
|---|
| 1200 | </p></td></tr>
|
|---|
| 1201 | <tr><td><p> PNG </p></td><td><p> X </p></td><td><p> X </p></td><td><p> 2 bit and 4 bit/pixel not supported yet.
|
|---|
| 1202 | </p></td></tr>
|
|---|
| 1203 | <tr><td><p> SGI </p></td><td><p> X </p></td><td><p> X </p></td><td><p> SGI RGB image format
|
|---|
| 1204 | </p></td></tr>
|
|---|
| 1205 | </table>
|
|---|
| 1206 |
|
|---|
| 1207 | <p><code>X</code> means that encoding (resp. decoding) is supported.
|
|---|
| 1208 | </p>
|
|---|
| 1209 | <hr size="6">
|
|---|
| 1210 | <a name="SEC19"></a>
|
|---|
| 1211 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1212 | <tr><td valign="middle" align="left">[<a href="#SEC18" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1213 | <td valign="middle" align="left">[<a href="#SEC20" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1214 | <td valign="middle" align="left"> </td>
|
|---|
| 1215 | <td valign="middle" align="left">[<a href="#SEC16" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1216 | <td valign="middle" align="left">[<a href="#SEC16" title="Up section"> Up </a>]</td>
|
|---|
| 1217 | <td valign="middle" align="left">[<a href="#SEC21" title="Next chapter"> >> </a>]</td>
|
|---|
| 1218 | <td valign="middle" align="left"> </td>
|
|---|
| 1219 | <td valign="middle" align="left"> </td>
|
|---|
| 1220 | <td valign="middle" align="left"> </td>
|
|---|
| 1221 | <td valign="middle" align="left"> </td>
|
|---|
| 1222 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1223 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1224 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1225 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1226 | </tr></table>
|
|---|
| 1227 | <h2 class="section"> 5.3 Video Codecs </h2>
|
|---|
| 1228 |
|
|---|
| 1229 | <table>
|
|---|
| 1230 | <tr><td><p> Supported Codec </p></td><td><p> Encoding </p></td><td><p> Decoding </p></td><td><p> Comments
|
|---|
| 1231 | </p></td></tr>
|
|---|
| 1232 | <tr><td><p> MPEG-1 video </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1233 | </p></td></tr>
|
|---|
| 1234 | <tr><td><p> MPEG-2 video </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1235 | </p></td></tr>
|
|---|
| 1236 | <tr><td><p> MPEG-4 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> also known as DivX4/5
|
|---|
| 1237 | </p></td></tr>
|
|---|
| 1238 | <tr><td><p> MSMPEG4 V1 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1239 | </p></td></tr>
|
|---|
| 1240 | <tr><td><p> MSMPEG4 V2 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1241 | </p></td></tr>
|
|---|
| 1242 | <tr><td><p> MSMPEG4 V3 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> also known as DivX3
|
|---|
| 1243 | </p></td></tr>
|
|---|
| 1244 | <tr><td><p> WMV7 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1245 | </p></td></tr>
|
|---|
| 1246 | <tr><td><p> WMV8 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> not completely working
|
|---|
| 1247 | </p></td></tr>
|
|---|
| 1248 | <tr><td><p> H.261 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1249 | </p></td></tr>
|
|---|
| 1250 | <tr><td><p> H.263(+) </p></td><td><p> X </p></td><td><p> X </p></td><td><p> also known as RealVideo 1.0
|
|---|
| 1251 | </p></td></tr>
|
|---|
| 1252 | <tr><td><p> H.264 </p></td><td> </td><td><p> X
|
|---|
| 1253 | </p></td></tr>
|
|---|
| 1254 | <tr><td><p> RealVideo 1.0 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1255 | </p></td></tr>
|
|---|
| 1256 | <tr><td><p> RealVideo 2.0 </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1257 | </p></td></tr>
|
|---|
| 1258 | <tr><td><p> MJPEG </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1259 | </p></td></tr>
|
|---|
| 1260 | <tr><td><p> lossless MJPEG </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1261 | </p></td></tr>
|
|---|
| 1262 | <tr><td><p> JPEG-LS </p></td><td><p> X </p></td><td><p> X </p></td><td><p> fourcc: MJLS, lossless and near-lossless is supported
|
|---|
| 1263 | </p></td></tr>
|
|---|
| 1264 | <tr><td><p> Apple MJPEG-B </p></td><td> </td><td><p> X
|
|---|
| 1265 | </p></td></tr>
|
|---|
| 1266 | <tr><td><p> Sunplus MJPEG </p></td><td> </td><td><p> X </p></td><td><p> fourcc: SP5X
|
|---|
| 1267 | </p></td></tr>
|
|---|
| 1268 | <tr><td><p> DV </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1269 | </p></td></tr>
|
|---|
| 1270 | <tr><td><p> HuffYUV </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1271 | </p></td></tr>
|
|---|
| 1272 | <tr><td><p> FFmpeg Video 1 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> experimental lossless codec (fourcc: FFV1)
|
|---|
| 1273 | </p></td></tr>
|
|---|
| 1274 | <tr><td><p> FFmpeg Snow </p></td><td><p> X </p></td><td><p> X </p></td><td><p> experimental wavelet codec (fourcc: SNOW)
|
|---|
| 1275 | </p></td></tr>
|
|---|
| 1276 | <tr><td><p> Asus v1 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> fourcc: ASV1
|
|---|
| 1277 | </p></td></tr>
|
|---|
| 1278 | <tr><td><p> Asus v2 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> fourcc: ASV2
|
|---|
| 1279 | </p></td></tr>
|
|---|
| 1280 | <tr><td><p> Creative YUV </p></td><td> </td><td><p> X </p></td><td><p> fourcc: CYUV
|
|---|
| 1281 | </p></td></tr>
|
|---|
| 1282 | <tr><td><p> Sorenson Video 1 </p></td><td><p> X </p></td><td><p> X </p></td><td><p> fourcc: SVQ1
|
|---|
| 1283 | </p></td></tr>
|
|---|
| 1284 | <tr><td><p> Sorenson Video 3 </p></td><td> </td><td><p> X </p></td><td><p> fourcc: SVQ3
|
|---|
| 1285 | </p></td></tr>
|
|---|
| 1286 | <tr><td><p> On2 VP3 </p></td><td> </td><td><p> X </p></td><td><p> still experimental
|
|---|
| 1287 | </p></td></tr>
|
|---|
| 1288 | <tr><td><p> Theora </p></td><td> </td><td><p> X </p></td><td><p> still experimental
|
|---|
| 1289 | </p></td></tr>
|
|---|
| 1290 | <tr><td><p> Intel Indeo 3 </p></td><td> </td><td><p> X
|
|---|
| 1291 | </p></td></tr>
|
|---|
| 1292 | <tr><td><p> FLV </p></td><td><p> X </p></td><td><p> X </p></td><td><p> Sorenson H.263 used in Flash
|
|---|
| 1293 | </p></td></tr>
|
|---|
| 1294 | <tr><td><p> Flash Screen Video </p></td><td> </td><td><p> X </p></td><td><p> fourcc: FSV1
|
|---|
| 1295 | </p></td></tr>
|
|---|
| 1296 | <tr><td><p> ATI VCR1 </p></td><td> </td><td><p> X </p></td><td><p> fourcc: VCR1
|
|---|
| 1297 | </p></td></tr>
|
|---|
| 1298 | <tr><td><p> ATI VCR2 </p></td><td> </td><td><p> X </p></td><td><p> fourcc: VCR2
|
|---|
| 1299 | </p></td></tr>
|
|---|
| 1300 | <tr><td><p> Cirrus Logic AccuPak </p></td><td> </td><td><p> X </p></td><td><p> fourcc: CLJR
|
|---|
| 1301 | </p></td></tr>
|
|---|
| 1302 | <tr><td><p> 4X Video </p></td><td> </td><td><p> X </p></td><td><p> Used in certain computer games.
|
|---|
| 1303 | </p></td></tr>
|
|---|
| 1304 | <tr><td><p> Sony Playstation MDEC </p></td><td> </td><td><p> X
|
|---|
| 1305 | </p></td></tr>
|
|---|
| 1306 | <tr><td><p> Id RoQ </p></td><td> </td><td><p> X </p></td><td><p> Used in Quake III, Jedi Knight 2, other computer games.
|
|---|
| 1307 | </p></td></tr>
|
|---|
| 1308 | <tr><td><p> Xan/WC3 </p></td><td> </td><td><p> X </p></td><td><p> Used in Wing Commander III .MVE files.
|
|---|
| 1309 | </p></td></tr>
|
|---|
| 1310 | <tr><td><p> Interplay Video </p></td><td> </td><td><p> X </p></td><td><p> Used in Interplay .MVE files.
|
|---|
| 1311 | </p></td></tr>
|
|---|
| 1312 | <tr><td><p> Apple Animation </p></td><td> </td><td><p> X </p></td><td><p> fourcc: 'rle '
|
|---|
| 1313 | </p></td></tr>
|
|---|
| 1314 | <tr><td><p> Apple Graphics </p></td><td> </td><td><p> X </p></td><td><p> fourcc: 'smc '
|
|---|
| 1315 | </p></td></tr>
|
|---|
| 1316 | <tr><td><p> Apple Video </p></td><td> </td><td><p> X </p></td><td><p> fourcc: rpza
|
|---|
| 1317 | </p></td></tr>
|
|---|
| 1318 | <tr><td><p> Apple QuickDraw </p></td><td> </td><td><p> X </p></td><td><p> fourcc: qdrw
|
|---|
| 1319 | </p></td></tr>
|
|---|
| 1320 | <tr><td><p> Cinepak </p></td><td> </td><td><p> X
|
|---|
| 1321 | </p></td></tr>
|
|---|
| 1322 | <tr><td><p> Microsoft RLE </p></td><td> </td><td><p> X
|
|---|
| 1323 | </p></td></tr>
|
|---|
| 1324 | <tr><td><p> Microsoft Video-1 </p></td><td> </td><td><p> X
|
|---|
| 1325 | </p></td></tr>
|
|---|
| 1326 | <tr><td><p> Westwood VQA </p></td><td> </td><td><p> X
|
|---|
| 1327 | </p></td></tr>
|
|---|
| 1328 | <tr><td><p> Id Cinematic Video </p></td><td> </td><td><p> X </p></td><td><p> Used in Quake II.
|
|---|
| 1329 | </p></td></tr>
|
|---|
| 1330 | <tr><td><p> Planar RGB </p></td><td> </td><td><p> X </p></td><td><p> fourcc: 8BPS
|
|---|
| 1331 | </p></td></tr>
|
|---|
| 1332 | <tr><td><p> FLIC video </p></td><td> </td><td><p> X
|
|---|
| 1333 | </p></td></tr>
|
|---|
| 1334 | <tr><td><p> Duck TrueMotion v1 </p></td><td> </td><td><p> X </p></td><td><p> fourcc: DUCK
|
|---|
| 1335 | </p></td></tr>
|
|---|
| 1336 | <tr><td><p> Duck TrueMotion v2 </p></td><td> </td><td><p> X </p></td><td><p> fourcc: TM20
|
|---|
| 1337 | </p></td></tr>
|
|---|
| 1338 | <tr><td><p> VMD Video </p></td><td> </td><td><p> X </p></td><td><p> Used in Sierra VMD files.
|
|---|
| 1339 | </p></td></tr>
|
|---|
| 1340 | <tr><td><p> MSZH </p></td><td> </td><td><p> X </p></td><td><p> Part of LCL
|
|---|
| 1341 | </p></td></tr>
|
|---|
| 1342 | <tr><td><p> ZLIB </p></td><td><p> X </p></td><td><p> X </p></td><td><p> Part of LCL, encoder experimental
|
|---|
| 1343 | </p></td></tr>
|
|---|
| 1344 | <tr><td><p> TechSmith Camtasia </p></td><td> </td><td><p> X </p></td><td><p> fourcc: TSCC
|
|---|
| 1345 | </p></td></tr>
|
|---|
| 1346 | <tr><td><p> IBM Ultimotion </p></td><td> </td><td><p> X </p></td><td><p> fourcc: ULTI
|
|---|
| 1347 | </p></td></tr>
|
|---|
| 1348 | <tr><td><p> Miro VideoXL </p></td><td> </td><td><p> X </p></td><td><p> fourcc: VIXL
|
|---|
| 1349 | </p></td></tr>
|
|---|
| 1350 | <tr><td><p> QPEG </p></td><td> </td><td><p> X </p></td><td><p> fourccs: QPEG, Q1.0, Q1.1
|
|---|
| 1351 | </p></td></tr>
|
|---|
| 1352 | <tr><td><p> LOCO </p></td><td> </td><td><p> X </p></td><td>
|
|---|
| 1353 | </td></tr>
|
|---|
| 1354 | <tr><td><p> Winnov WNV1 </p></td><td> </td><td><p> X </p></td><td>
|
|---|
| 1355 | </td></tr>
|
|---|
| 1356 | <tr><td><p> Autodesk Animator Studio Codec </p></td><td> </td><td><p> X </p></td><td><p> fourcc: AASC
|
|---|
| 1357 | </p></td></tr>
|
|---|
| 1358 | <tr><td><p> Fraps FPS1 </p></td><td> </td><td><p> X </p></td><td>
|
|---|
| 1359 | </td></tr>
|
|---|
| 1360 | <tr><td><p> CamStudio </p></td><td> </td><td><p> X </p></td><td><p> fourcc: CSCD
|
|---|
| 1361 | </p></td></tr>
|
|---|
| 1362 | <tr><td><p> American Laser Games Video </p></td><td> </td><td><p> X </p></td><td><p> Used in games like Mad Dog McCree
|
|---|
| 1363 | </p></td></tr>
|
|---|
| 1364 | <tr><td><p> ZMBV </p></td><td> </td><td><p> X </p></td><td>
|
|---|
| 1365 | </td></tr>
|
|---|
| 1366 | <tr><td><p> AVS Video </p></td><td> </td><td><p> X </p></td><td><p> Video encoding used by the Creature Shock game.
|
|---|
| 1367 | </p></td></tr>
|
|---|
| 1368 | <tr><td><p> Smacker Video </p></td><td> </td><td><p> X </p></td><td><p> Video encoding used in Smacker.
|
|---|
| 1369 | </p></td></tr>
|
|---|
| 1370 | <tr><td><p> RTjpeg </p></td><td> </td><td><p> X </p></td><td><p> Video encoding used in NuppelVideo files.
|
|---|
| 1371 | </p></td></tr>
|
|---|
| 1372 | <tr><td><p> KMVC </p></td><td> </td><td><p> X </p></td><td><p> Codec used in Worms games.
|
|---|
| 1373 | </p></td></tr>
|
|---|
| 1374 | </table>
|
|---|
| 1375 |
|
|---|
| 1376 | <p><code>X</code> means that encoding (resp. decoding) is supported.
|
|---|
| 1377 | </p>
|
|---|
| 1378 | <p>See <a href="http://mplayerhq.hu/~michael/codec-features.html">http://mplayerhq.hu/~michael/codec-features.html</a> to
|
|---|
| 1379 | get a precise comparison of the FFmpeg MPEG-4 codec compared to
|
|---|
| 1380 | other implementations.
|
|---|
| 1381 | </p>
|
|---|
| 1382 | <hr size="6">
|
|---|
| 1383 | <a name="SEC20"></a>
|
|---|
| 1384 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1385 | <tr><td valign="middle" align="left">[<a href="#SEC19" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1386 | <td valign="middle" align="left">[<a href="#SEC21" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1387 | <td valign="middle" align="left"> </td>
|
|---|
| 1388 | <td valign="middle" align="left">[<a href="#SEC16" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1389 | <td valign="middle" align="left">[<a href="#SEC16" title="Up section"> Up </a>]</td>
|
|---|
| 1390 | <td valign="middle" align="left">[<a href="#SEC21" title="Next chapter"> >> </a>]</td>
|
|---|
| 1391 | <td valign="middle" align="left"> </td>
|
|---|
| 1392 | <td valign="middle" align="left"> </td>
|
|---|
| 1393 | <td valign="middle" align="left"> </td>
|
|---|
| 1394 | <td valign="middle" align="left"> </td>
|
|---|
| 1395 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1396 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1397 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1398 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1399 | </tr></table>
|
|---|
| 1400 | <h2 class="section"> 5.4 Audio Codecs </h2>
|
|---|
| 1401 |
|
|---|
| 1402 | <table>
|
|---|
| 1403 | <tr><td><p> Supported Codec </p></td><td><p> Encoding </p></td><td><p> Decoding </p></td><td><p> Comments
|
|---|
| 1404 | </p></td></tr>
|
|---|
| 1405 | <tr><td><p> MPEG audio layer 2 </p></td><td><p> IX </p></td><td><p> IX
|
|---|
| 1406 | </p></td></tr>
|
|---|
| 1407 | <tr><td><p> MPEG audio layer 1/3 </p></td><td><p> IX </p></td><td><p> IX
|
|---|
| 1408 | </p></td><td><p> MP3 encoding is supported through the external library LAME.
|
|---|
| 1409 | </p></td></tr>
|
|---|
| 1410 | <tr><td><p> AC3 </p></td><td><p> IX </p></td><td><p> IX
|
|---|
| 1411 | </p></td><td><p> liba52 is used internally for decoding.
|
|---|
| 1412 | </p></td></tr>
|
|---|
| 1413 | <tr><td><p> Vorbis </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1414 | </p></td><td><p> Supported through the external library libvorbis.
|
|---|
| 1415 | </p></td></tr>
|
|---|
| 1416 | <tr><td><p> WMA V1/V2 </p></td><td> </td><td><p> X
|
|---|
| 1417 | </p></td></tr>
|
|---|
| 1418 | <tr><td><p> AAC </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1419 | </p></td><td><p> Supported through the external library libfaac/libfaad.
|
|---|
| 1420 | </p></td></tr>
|
|---|
| 1421 | <tr><td><p> Microsoft ADPCM </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1422 | </p></td></tr>
|
|---|
| 1423 | <tr><td><p> MS IMA ADPCM </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1424 | </p></td></tr>
|
|---|
| 1425 | <tr><td><p> QT IMA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1426 | </p></td></tr>
|
|---|
| 1427 | <tr><td><p> 4X IMA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1428 | </p></td></tr>
|
|---|
| 1429 | <tr><td><p> G.726 ADPCM </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1430 | </p></td></tr>
|
|---|
| 1431 | <tr><td><p> Duck DK3 IMA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1432 | </p></td><td><p> Used in some Sega Saturn console games.
|
|---|
| 1433 | </p></td></tr>
|
|---|
| 1434 | <tr><td><p> Duck DK4 IMA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1435 | </p></td><td><p> Used in some Sega Saturn console games.
|
|---|
| 1436 | </p></td></tr>
|
|---|
| 1437 | <tr><td><p> Westwood Studios IMA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1438 | </p></td><td><p> Used in Westwood Studios games like Command and Conquer.
|
|---|
| 1439 | </p></td></tr>
|
|---|
| 1440 | <tr><td><p> SMJPEG IMA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1441 | </p></td><td><p> Used in certain Loki game ports.
|
|---|
| 1442 | </p></td></tr>
|
|---|
| 1443 | <tr><td><p> CD-ROM XA ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1444 | </p></td></tr>
|
|---|
| 1445 | <tr><td><p> CRI ADX ADPCM </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1446 | </p></td><td><p> Used in Sega Dreamcast games.
|
|---|
| 1447 | </p></td></tr>
|
|---|
| 1448 | <tr><td><p> Electronic Arts ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1449 | </p></td><td><p> Used in various EA titles.
|
|---|
| 1450 | </p></td></tr>
|
|---|
| 1451 | <tr><td><p> Creative ADPCM </p></td><td> </td><td><p> X
|
|---|
| 1452 | </p></td><td><p> 16 -> 4, 8 -> 4, 8 -> 3, 8 -> 2
|
|---|
| 1453 | </p></td></tr>
|
|---|
| 1454 | <tr><td><p> RA144 </p></td><td> </td><td><p> X
|
|---|
| 1455 | </p></td><td><p> Real 14400 bit/s codec
|
|---|
| 1456 | </p></td></tr>
|
|---|
| 1457 | <tr><td><p> RA288 </p></td><td> </td><td><p> X
|
|---|
| 1458 | </p></td><td><p> Real 28800 bit/s codec
|
|---|
| 1459 | </p></td></tr>
|
|---|
| 1460 | <tr><td><p> RADnet </p></td><td><p> X </p></td><td><p> IX
|
|---|
| 1461 | </p></td><td><p> Real low bitrate AC3 codec, liba52 is used for decoding.
|
|---|
| 1462 | </p></td></tr>
|
|---|
| 1463 | <tr><td><p> AMR-NB </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1464 | </p></td><td><p> Supported through an external library.
|
|---|
| 1465 | </p></td></tr>
|
|---|
| 1466 | <tr><td><p> AMR-WB </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1467 | </p></td><td><p> Supported through an external library.
|
|---|
| 1468 | </p></td></tr>
|
|---|
| 1469 | <tr><td><p> DV audio </p></td><td> </td><td><p> X
|
|---|
| 1470 | </p></td></tr>
|
|---|
| 1471 | <tr><td><p> Id RoQ DPCM </p></td><td> </td><td><p> X
|
|---|
| 1472 | </p></td><td><p> Used in Quake III, Jedi Knight 2, other computer games.
|
|---|
| 1473 | </p></td></tr>
|
|---|
| 1474 | <tr><td><p> Interplay MVE DPCM </p></td><td> </td><td><p> X
|
|---|
| 1475 | </p></td><td><p> Used in various Interplay computer games.
|
|---|
| 1476 | </p></td></tr>
|
|---|
| 1477 | <tr><td><p> Xan DPCM </p></td><td> </td><td><p> X
|
|---|
| 1478 | </p></td><td><p> Used in Origin's Wing Commander IV AVI files.
|
|---|
| 1479 | </p></td></tr>
|
|---|
| 1480 | <tr><td><p> Sierra Online DPCM </p></td><td> </td><td><p> X
|
|---|
| 1481 | </p></td><td><p> Used in Sierra Online game audio files.
|
|---|
| 1482 | </p></td></tr>
|
|---|
| 1483 | <tr><td><p> Apple MACE 3 </p></td><td> </td><td><p> X
|
|---|
| 1484 | </p></td></tr>
|
|---|
| 1485 | <tr><td><p> Apple MACE 6 </p></td><td> </td><td><p> X
|
|---|
| 1486 | </p></td></tr>
|
|---|
| 1487 | <tr><td><p> FLAC lossless audio </p></td><td> </td><td><p> X
|
|---|
| 1488 | </p></td></tr>
|
|---|
| 1489 | <tr><td><p> Shorten lossless audio </p></td><td> </td><td><p> X
|
|---|
| 1490 | </p></td></tr>
|
|---|
| 1491 | <tr><td><p> Apple lossless audio </p></td><td> </td><td><p> X
|
|---|
| 1492 | </p></td><td><p> QuickTime fourcc 'alac'
|
|---|
| 1493 | </p></td></tr>
|
|---|
| 1494 | <tr><td><p> FFmpeg Sonic </p></td><td><p> X </p></td><td><p> X
|
|---|
| 1495 | </p></td><td><p> experimental lossy/lossless codec
|
|---|
| 1496 | </p></td></tr>
|
|---|
| 1497 | <tr><td><p> Qdesign QDM2 </p></td><td> </td><td><p> X
|
|---|
| 1498 | </p></td><td><p> there are still some distortions
|
|---|
| 1499 | </p></td></tr>
|
|---|
| 1500 | <tr><td><p> Real COOK </p></td><td> </td><td><p> X
|
|---|
| 1501 | </p></td><td><p> All versions except 5.1 are supported
|
|---|
| 1502 | </p></td></tr>
|
|---|
| 1503 | <tr><td><p> DSP Group TrueSpeech </p></td><td> </td><td><p> X
|
|---|
| 1504 | </p></td></tr>
|
|---|
| 1505 | <tr><td><p> True Audio (TTA) </p></td><td> </td><td><p> X
|
|---|
| 1506 | </p></td></tr>
|
|---|
| 1507 | <tr><td><p> Smacker Audio </p></td><td> </td><td><p> X
|
|---|
| 1508 | </p></td></tr>
|
|---|
| 1509 | </table>
|
|---|
| 1510 |
|
|---|
| 1511 | <p><code>X</code> means that encoding (resp. decoding) is supported.
|
|---|
| 1512 | </p>
|
|---|
| 1513 | <p><code>I</code> means that an integer-only version is available, too (ensures high
|
|---|
| 1514 | performance on systems without hardware floating point support).
|
|---|
| 1515 | </p>
|
|---|
| 1516 | <hr size="6">
|
|---|
| 1517 | <a name="SEC21"></a>
|
|---|
| 1518 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1519 | <tr><td valign="middle" align="left">[<a href="#SEC20" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1520 | <td valign="middle" align="left">[<a href="#SEC22" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1521 | <td valign="middle" align="left"> </td>
|
|---|
| 1522 | <td valign="middle" align="left">[<a href="#SEC16" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1523 | <td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
|
|---|
| 1524 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1525 | <td valign="middle" align="left"> </td>
|
|---|
| 1526 | <td valign="middle" align="left"> </td>
|
|---|
| 1527 | <td valign="middle" align="left"> </td>
|
|---|
| 1528 | <td valign="middle" align="left"> </td>
|
|---|
| 1529 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1530 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1531 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1532 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1533 | </tr></table>
|
|---|
| 1534 | <h1 class="chapter"> 6. Platform Specific information </h1>
|
|---|
| 1535 |
|
|---|
| 1536 | <hr size="6">
|
|---|
| 1537 | <a name="SEC22"></a>
|
|---|
| 1538 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1539 | <tr><td valign="middle" align="left">[<a href="#SEC21" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1540 | <td valign="middle" align="left">[<a href="#SEC23" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1541 | <td valign="middle" align="left"> </td>
|
|---|
| 1542 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1543 | <td valign="middle" align="left">[<a href="#SEC21" title="Up section"> Up </a>]</td>
|
|---|
| 1544 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1545 | <td valign="middle" align="left"> </td>
|
|---|
| 1546 | <td valign="middle" align="left"> </td>
|
|---|
| 1547 | <td valign="middle" align="left"> </td>
|
|---|
| 1548 | <td valign="middle" align="left"> </td>
|
|---|
| 1549 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1550 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1551 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1552 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1553 | </tr></table>
|
|---|
| 1554 | <h2 class="section"> 6.1 Linux </h2>
|
|---|
| 1555 |
|
|---|
| 1556 | <p>FFmpeg should be compiled with at least GCC 2.95.3. GCC 3.2 is the
|
|---|
| 1557 | preferred compiler now for FFmpeg. All future optimizations will depend on
|
|---|
| 1558 | features only found in GCC 3.2.
|
|---|
| 1559 | </p>
|
|---|
| 1560 | <hr size="6">
|
|---|
| 1561 | <a name="SEC23"></a>
|
|---|
| 1562 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1563 | <tr><td valign="middle" align="left">[<a href="#SEC22" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1564 | <td valign="middle" align="left">[<a href="#SEC24" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1565 | <td valign="middle" align="left"> </td>
|
|---|
| 1566 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1567 | <td valign="middle" align="left">[<a href="#SEC21" title="Up section"> Up </a>]</td>
|
|---|
| 1568 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1569 | <td valign="middle" align="left"> </td>
|
|---|
| 1570 | <td valign="middle" align="left"> </td>
|
|---|
| 1571 | <td valign="middle" align="left"> </td>
|
|---|
| 1572 | <td valign="middle" align="left"> </td>
|
|---|
| 1573 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1574 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1575 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1576 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1577 | </tr></table>
|
|---|
| 1578 | <h2 class="section"> 6.2 BSD </h2>
|
|---|
| 1579 |
|
|---|
| 1580 | <p>BSD make will not build FFmpeg, you need to install and use GNU Make
|
|---|
| 1581 | (<tt>`gmake'</tt>).
|
|---|
| 1582 | </p>
|
|---|
| 1583 | <hr size="6">
|
|---|
| 1584 | <a name="SEC24"></a>
|
|---|
| 1585 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1586 | <tr><td valign="middle" align="left">[<a href="#SEC23" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1587 | <td valign="middle" align="left">[<a href="#SEC25" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1588 | <td valign="middle" align="left"> </td>
|
|---|
| 1589 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1590 | <td valign="middle" align="left">[<a href="#SEC21" title="Up section"> Up </a>]</td>
|
|---|
| 1591 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1592 | <td valign="middle" align="left"> </td>
|
|---|
| 1593 | <td valign="middle" align="left"> </td>
|
|---|
| 1594 | <td valign="middle" align="left"> </td>
|
|---|
| 1595 | <td valign="middle" align="left"> </td>
|
|---|
| 1596 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1597 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1598 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1599 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1600 | </tr></table>
|
|---|
| 1601 | <h2 class="section"> 6.3 Windows </h2>
|
|---|
| 1602 |
|
|---|
| 1603 | <hr size="6">
|
|---|
| 1604 | <a name="SEC25"></a>
|
|---|
| 1605 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1606 | <tr><td valign="middle" align="left">[<a href="#SEC24" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1607 | <td valign="middle" align="left">[<a href="#SEC26" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1608 | <td valign="middle" align="left"> </td>
|
|---|
| 1609 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1610 | <td valign="middle" align="left">[<a href="#SEC24" title="Up section"> Up </a>]</td>
|
|---|
| 1611 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1612 | <td valign="middle" align="left"> </td>
|
|---|
| 1613 | <td valign="middle" align="left"> </td>
|
|---|
| 1614 | <td valign="middle" align="left"> </td>
|
|---|
| 1615 | <td valign="middle" align="left"> </td>
|
|---|
| 1616 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1617 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1618 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1619 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1620 | </tr></table>
|
|---|
| 1621 | <h3 class="subsection"> 6.3.1 Native Windows compilation </h3>
|
|---|
| 1622 |
|
|---|
| 1623 | <ul class="toc">
|
|---|
| 1624 | <li> Install the current versions of MSYS and MinGW from
|
|---|
| 1625 | <a href="http://www.mingw.org/">http://www.mingw.org/</a>. You can find detailed installation
|
|---|
| 1626 | instructions in the download section and the FAQ.
|
|---|
| 1627 |
|
|---|
| 1628 | </li><li> If you want to test the FFplay, also download
|
|---|
| 1629 | the MinGW development library of SDL 1.2.x
|
|---|
| 1630 | (<tt>`SDL-devel-1.2.x-mingw32.tar.gz'</tt>) from
|
|---|
| 1631 | <a href="http://www.libsdl.org">http://www.libsdl.org</a>. Unpack it in a temporary directory, and
|
|---|
| 1632 | unpack the archive <tt>`i386-mingw32msvc.tar.gz'</tt> in the MinGW tool
|
|---|
| 1633 | directory. Edit the <tt>`sdl-config'</tt> script so that it gives the
|
|---|
| 1634 | correct SDL directory when invoked.
|
|---|
| 1635 |
|
|---|
| 1636 | </li><li> Extract the current version of FFmpeg.
|
|---|
| 1637 |
|
|---|
| 1638 | </li><li> Start the MSYS shell (file <tt>`msys.bat'</tt>).
|
|---|
| 1639 |
|
|---|
| 1640 | </li><li> Change to the FFmpeg directory and follow
|
|---|
| 1641 | the instructions of how to compile FFmpeg (file
|
|---|
| 1642 | <tt>`INSTALL'</tt>). Usually, launching <tt>`./configure'</tt> and <tt>`make'</tt>
|
|---|
| 1643 | suffices. If you have problems using SDL, verify that
|
|---|
| 1644 | <tt>`sdl-config'</tt> can be launched from the MSYS command line.
|
|---|
| 1645 |
|
|---|
| 1646 | </li><li> You can install FFmpeg in <tt>`Program Files/FFmpeg'</tt> by typing
|
|---|
| 1647 | <tt>`make install'</tt>. Don't forget to copy <tt>`SDL.dll'</tt> to the place
|
|---|
| 1648 | you launch <tt>`ffplay'</tt> from.
|
|---|
| 1649 |
|
|---|
| 1650 | </li></ul>
|
|---|
| 1651 |
|
|---|
| 1652 | <p>Notes:
|
|---|
| 1653 | </p><ul class="toc">
|
|---|
| 1654 | <li> The target <tt>`make wininstaller'</tt> can be used to create a
|
|---|
| 1655 | Nullsoft based Windows installer for FFmpeg and FFplay. <tt>`SDL.dll'</tt>
|
|---|
| 1656 | must be copied to the FFmpeg directory in order to build the
|
|---|
| 1657 | installer.
|
|---|
| 1658 |
|
|---|
| 1659 | </li><li> By using <code>./configure --enable-shared</code> when configuring FFmpeg,
|
|---|
| 1660 | you can build <tt>`avcodec.dll'</tt> and <tt>`avformat.dll'</tt>. With
|
|---|
| 1661 | <code>make install</code> you install the FFmpeg DLLs and the associated
|
|---|
| 1662 | headers in <tt>`Program Files/FFmpeg'</tt>.
|
|---|
| 1663 |
|
|---|
| 1664 | </li><li> Visual C++ compatibility: If you used <code>./configure --enable-shared</code>
|
|---|
| 1665 | when configuring FFmpeg, FFmpeg tries to use the Microsoft Visual
|
|---|
| 1666 | C++ <code>lib</code> tool to build <code>avcodec.lib</code> and
|
|---|
| 1667 | <code>avformat.lib</code>. With these libraries you can link your Visual C++
|
|---|
| 1668 | code directly with the FFmpeg DLLs (see below).
|
|---|
| 1669 |
|
|---|
| 1670 | </li></ul>
|
|---|
| 1671 |
|
|---|
| 1672 | <hr size="6">
|
|---|
| 1673 | <a name="SEC26"></a>
|
|---|
| 1674 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1675 | <tr><td valign="middle" align="left">[<a href="#SEC25" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1676 | <td valign="middle" align="left">[<a href="#SEC27" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1677 | <td valign="middle" align="left"> </td>
|
|---|
| 1678 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1679 | <td valign="middle" align="left">[<a href="#SEC24" title="Up section"> Up </a>]</td>
|
|---|
| 1680 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1681 | <td valign="middle" align="left"> </td>
|
|---|
| 1682 | <td valign="middle" align="left"> </td>
|
|---|
| 1683 | <td valign="middle" align="left"> </td>
|
|---|
| 1684 | <td valign="middle" align="left"> </td>
|
|---|
| 1685 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1686 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1687 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1688 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1689 | </tr></table>
|
|---|
| 1690 | <h3 class="subsection"> 6.3.2 Visual C++ compatibility </h3>
|
|---|
| 1691 |
|
|---|
| 1692 | <p>FFmpeg will not compile under Visual C++ - and it has too many
|
|---|
| 1693 | dependencies on the GCC compiler to make a port viable. However,
|
|---|
| 1694 | if you want to use the FFmpeg libraries in your own applications,
|
|---|
| 1695 | you can still compile those applications using Visual C++. An
|
|---|
| 1696 | important restriction to this is that you have to use the
|
|---|
| 1697 | dynamically linked versions of the FFmpeg libraries (i.e. the
|
|---|
| 1698 | DLLs), and you have to make sure that Visual-C++-compatible
|
|---|
| 1699 | import libraries are created during the FFmpeg build process.
|
|---|
| 1700 | </p>
|
|---|
| 1701 | <p>This description of how to use the FFmpeg libraries with Visual C++ is
|
|---|
| 1702 | based on Visual C++ 2005 Express Edition Beta 2. If you have a different
|
|---|
| 1703 | version, you might have to modify the procedures slightly.
|
|---|
| 1704 | </p>
|
|---|
| 1705 | <p>Here are the step-by-step instructions for building the FFmpeg libraries
|
|---|
| 1706 | so they can be used with Visual C++:
|
|---|
| 1707 | </p>
|
|---|
| 1708 | <ol>
|
|---|
| 1709 | <li> Install Visual C++ (if you haven't done so already).
|
|---|
| 1710 |
|
|---|
| 1711 | </li><li> Install MinGW and MSYS as described above.
|
|---|
| 1712 |
|
|---|
| 1713 | </li><li> Add a call to <tt>`vcvars32.bat'</tt> (which sets up the environment
|
|---|
| 1714 | variables for the Visual C++ tools) as the first line of
|
|---|
| 1715 | <tt>`msys.bat'</tt>. The standard location for <tt>`vcvars32.bat'</tt> is
|
|---|
| 1716 | <tt>`C:\Program Files\Microsoft Visual Studio 8\VC\bin\vcvars32.bat'</tt>,
|
|---|
| 1717 | and the standard location for <tt>`msys.bat'</tt> is
|
|---|
| 1718 | <tt>`C:\msys\1.0\msys.bat'</tt>. If this corresponds to your setup, add the
|
|---|
| 1719 | following line as the first line of <tt>`msys.bat'</tt>:
|
|---|
| 1720 |
|
|---|
| 1721 | <p><code>call "C:\Program Files\Microsoft Visual Studio 8\VC\bin\vcvars32.bat"</code>
|
|---|
| 1722 | </p>
|
|---|
| 1723 | </li><li> Start the MSYS shell (file <tt>`msys.bat'</tt>) and type <code>link.exe</code>.
|
|---|
| 1724 | If you get a help message with the command line options of <code>link.exe</code>,
|
|---|
| 1725 | this means your environment variables are set up correctly, the
|
|---|
| 1726 | Microsoft linker is on the path and will be used by FFmpeg to
|
|---|
| 1727 | create Visual-C++-compatible import libraries.
|
|---|
| 1728 |
|
|---|
| 1729 | </li><li> Extract the current version of FFmpeg and change to the FFmpeg directory.
|
|---|
| 1730 |
|
|---|
| 1731 | </li><li> Type the command
|
|---|
| 1732 | <code>./configure --enable-shared --disable-static --enable-memalign-hack</code>
|
|---|
| 1733 | to configure and, if that didn't produce any errors,
|
|---|
| 1734 | type <code>make</code> to build FFmpeg.
|
|---|
| 1735 |
|
|---|
| 1736 | </li><li> The subdirectories <tt>`libavformat'</tt>, <tt>`libavcodec'</tt>, and
|
|---|
| 1737 | <tt>`libavutil'</tt> should now contain the files <tt>`avformat.dll'</tt>,
|
|---|
| 1738 | <tt>`avformat.lib'</tt>, <tt>`avcodec.dll'</tt>, <tt>`avcodec.lib'</tt>,
|
|---|
| 1739 | <tt>`avutil.dll'</tt>, and <tt>`avutil.lib'</tt>, respectively. Copy the three
|
|---|
| 1740 | DLLs to your System32 directory (typically <tt>`C:\Windows\System32'</tt>).
|
|---|
| 1741 |
|
|---|
| 1742 | </li></ol>
|
|---|
| 1743 |
|
|---|
| 1744 | <p>And here is how to use these libraries with Visual C++:
|
|---|
| 1745 | </p>
|
|---|
| 1746 | <ol>
|
|---|
| 1747 | <li> Create a new console application ("File / New / Project") and then
|
|---|
| 1748 | select "Win32 Console Application". On the appropriate page of the
|
|---|
| 1749 | Application Wizard, uncheck the "Precompiled headers" option.
|
|---|
| 1750 |
|
|---|
| 1751 | </li><li> Write the source code for your application, or, for testing, just
|
|---|
| 1752 | copy the code from an existing sample application into the source file
|
|---|
| 1753 | that Visual C++ has already created for you. (Note that your source
|
|---|
| 1754 | filehas to have a <code>.cpp</code> extension; otherwise, Visual C++ won't
|
|---|
| 1755 | compile the FFmpeg headers correctly because in C mode, it doesn't
|
|---|
| 1756 | recognize the <code>inline</code> keyword.) For example, you can copy
|
|---|
| 1757 | <tt>`output_example.c'</tt> from the FFmpeg distribution (but you will
|
|---|
| 1758 | have to make minor modifications so the code will compile under
|
|---|
| 1759 | C++, see below).
|
|---|
| 1760 |
|
|---|
| 1761 | </li><li> Open the "Project / Properties" dialog box. In the "Configuration"
|
|---|
| 1762 | combo box, select "All Configurations" so that the changes you make will
|
|---|
| 1763 | affect both debug and release builds. In the tree view on the left hand
|
|---|
| 1764 | side, select "C/C++ / General", then edit the "Additional Include
|
|---|
| 1765 | Directories" setting to contain the complete paths to the
|
|---|
| 1766 | <tt>`libavformat'</tt>, <tt>`libavcodec'</tt>, and <tt>`libavutil'</tt>
|
|---|
| 1767 | subdirectories of your FFmpeg directory. Note that the directories have
|
|---|
| 1768 | to be separated using semicolons. Now select "Linker / General" from the
|
|---|
| 1769 | tree view and edit the "Additional Library Directories" setting to
|
|---|
| 1770 | contain the same three directories.
|
|---|
| 1771 |
|
|---|
| 1772 | </li><li> Still in the "Project / Properties" dialog box, select "Linker / Input"
|
|---|
| 1773 | from the tree view, then add the files <tt>`avformat.lib'</tt>,
|
|---|
| 1774 | <tt>`avcodec.lib'</tt>, and <tt>`avutil.lib'</tt> to the end of the "Additional
|
|---|
| 1775 | Dependencies". Note that the names of the libraries have to be separated
|
|---|
| 1776 | using spaces.
|
|---|
| 1777 |
|
|---|
| 1778 | </li><li> Now, select "C/C++ / Code Generation" from the tree view. Select
|
|---|
| 1779 | "Debug" in the "Configuration" combo box. Make sure that "Runtime
|
|---|
| 1780 | Library" is set to "Multi-threaded Debug DLL". Then, select "Release" in
|
|---|
| 1781 | the "Configuration" combo box and make sure that "Runtime Library" is
|
|---|
| 1782 | set to "Multi-threaded DLL".
|
|---|
| 1783 |
|
|---|
| 1784 | </li><li> Click "OK" to close the "Project / Properties" dialog box and build
|
|---|
| 1785 | the application. Hopefully, it should compile and run cleanly. If you
|
|---|
| 1786 | used <tt>`output_example.c'</tt> as your sample application, you will get a
|
|---|
| 1787 | few compiler errors, but they are easy to fix. The first type of error
|
|---|
| 1788 | occurs because Visual C++ doesn't allow an <code>int</code> to be converted to
|
|---|
| 1789 | an <code>enum</code> without a cast. To solve the problem, insert the required
|
|---|
| 1790 | casts (this error occurs once for a <code>CodecID</code> and once for a
|
|---|
| 1791 | <code>CodecType</code>). The second type of error occurs because C++ requires
|
|---|
| 1792 | the return value of <code>malloc</code> to be cast to the exact type of the
|
|---|
| 1793 | pointer it is being assigned to. Visual C++ will complain that, for
|
|---|
| 1794 | example, <code>(void *)</code> is being assigned to <code>(uint8_t *)</code> without
|
|---|
| 1795 | an explicit cast. So insert an explicit cast in these places to silence
|
|---|
| 1796 | the compiler. The third type of error occurs because the <code>snprintf</code>
|
|---|
| 1797 | library function is called <code>_snprintf</code> under Visual C++. So just
|
|---|
| 1798 | add an underscore to fix the problem. With these changes,
|
|---|
| 1799 | <tt>`output_example.c'</tt> should compile under Visual C++, and the
|
|---|
| 1800 | resulting executable should produce valid video files.
|
|---|
| 1801 |
|
|---|
| 1802 | </li></ol>
|
|---|
| 1803 |
|
|---|
| 1804 | <hr size="6">
|
|---|
| 1805 | <a name="SEC27"></a>
|
|---|
| 1806 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1807 | <tr><td valign="middle" align="left">[<a href="#SEC26" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1808 | <td valign="middle" align="left">[<a href="#SEC28" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1809 | <td valign="middle" align="left"> </td>
|
|---|
| 1810 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1811 | <td valign="middle" align="left">[<a href="#SEC24" title="Up section"> Up </a>]</td>
|
|---|
| 1812 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1813 | <td valign="middle" align="left"> </td>
|
|---|
| 1814 | <td valign="middle" align="left"> </td>
|
|---|
| 1815 | <td valign="middle" align="left"> </td>
|
|---|
| 1816 | <td valign="middle" align="left"> </td>
|
|---|
| 1817 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1818 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1819 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1820 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1821 | </tr></table>
|
|---|
| 1822 | <h3 class="subsection"> 6.3.3 Cross compilation for Windows with Linux </h3>
|
|---|
| 1823 |
|
|---|
| 1824 | <p>You must use the MinGW cross compilation tools available at
|
|---|
| 1825 | <a href="http://www.mingw.org/">http://www.mingw.org/</a>.
|
|---|
| 1826 | </p>
|
|---|
| 1827 | <p>Then configure FFmpeg with the following options:
|
|---|
| 1828 | </p><table><tr><td> </td><td><pre class="example">./configure --enable-mingw32 --cross-prefix=i386-mingw32msvc-
|
|---|
| 1829 | </pre></td></tr></table><p>(you can change the cross-prefix according to the prefix chosen for the
|
|---|
| 1830 | MinGW tools).
|
|---|
| 1831 | </p>
|
|---|
| 1832 | <p>Then you can easily test FFmpeg with Wine
|
|---|
| 1833 | (<a href="http://www.winehq.com/">http://www.winehq.com/</a>).
|
|---|
| 1834 | </p>
|
|---|
| 1835 | <hr size="6">
|
|---|
| 1836 | <a name="SEC28"></a>
|
|---|
| 1837 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1838 | <tr><td valign="middle" align="left">[<a href="#SEC27" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1839 | <td valign="middle" align="left">[<a href="#SEC29" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1840 | <td valign="middle" align="left"> </td>
|
|---|
| 1841 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1842 | <td valign="middle" align="left">[<a href="#SEC21" title="Up section"> Up </a>]</td>
|
|---|
| 1843 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1844 | <td valign="middle" align="left"> </td>
|
|---|
| 1845 | <td valign="middle" align="left"> </td>
|
|---|
| 1846 | <td valign="middle" align="left"> </td>
|
|---|
| 1847 | <td valign="middle" align="left"> </td>
|
|---|
| 1848 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1849 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1850 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1851 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1852 | </tr></table>
|
|---|
| 1853 | <h2 class="section"> 6.4 Mac OS X </h2>
|
|---|
| 1854 |
|
|---|
| 1855 | <hr size="6">
|
|---|
| 1856 | <a name="SEC29"></a>
|
|---|
| 1857 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1858 | <tr><td valign="middle" align="left">[<a href="#SEC28" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1859 | <td valign="middle" align="left">[<a href="#SEC30" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1860 | <td valign="middle" align="left"> </td>
|
|---|
| 1861 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1862 | <td valign="middle" align="left">[<a href="#SEC21" title="Up section"> Up </a>]</td>
|
|---|
| 1863 | <td valign="middle" align="left">[<a href="#SEC30" title="Next chapter"> >> </a>]</td>
|
|---|
| 1864 | <td valign="middle" align="left"> </td>
|
|---|
| 1865 | <td valign="middle" align="left"> </td>
|
|---|
| 1866 | <td valign="middle" align="left"> </td>
|
|---|
| 1867 | <td valign="middle" align="left"> </td>
|
|---|
| 1868 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1869 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1870 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1871 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1872 | </tr></table>
|
|---|
| 1873 | <h2 class="section"> 6.5 BeOS </h2>
|
|---|
| 1874 |
|
|---|
| 1875 | <p>The configure script should guess the configuration itself.
|
|---|
| 1876 | Networking support is currently not finished.
|
|---|
| 1877 | errno issues fixed by Andrew Bachmann.
|
|---|
| 1878 | </p>
|
|---|
| 1879 | <p>Old stuff:
|
|---|
| 1880 | </p>
|
|---|
| 1881 | <p>François Revol - revol at free dot fr - April 2002
|
|---|
| 1882 | </p>
|
|---|
| 1883 | <p>The configure script should guess the configuration itself,
|
|---|
| 1884 | however I still didn't test building on the net_server version of BeOS.
|
|---|
| 1885 | </p>
|
|---|
| 1886 | <p>FFserver is broken (needs poll() implementation).
|
|---|
| 1887 | </p>
|
|---|
| 1888 | <p>There are still issues with errno codes, which are negative in BeOS, and
|
|---|
| 1889 | that FFmpeg negates when returning. This ends up turning errors into
|
|---|
| 1890 | valid results, then crashes.
|
|---|
| 1891 | (To be fixed)
|
|---|
| 1892 | </p>
|
|---|
| 1893 | <hr size="6">
|
|---|
| 1894 | <a name="SEC30"></a>
|
|---|
| 1895 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1896 | <tr><td valign="middle" align="left">[<a href="#SEC29" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1897 | <td valign="middle" align="left">[<a href="#SEC31" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1898 | <td valign="middle" align="left"> </td>
|
|---|
| 1899 | <td valign="middle" align="left">[<a href="#SEC21" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1900 | <td valign="middle" align="left">[<a href="#SEC1" title="Up section"> Up </a>]</td>
|
|---|
| 1901 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 1902 | <td valign="middle" align="left"> </td>
|
|---|
| 1903 | <td valign="middle" align="left"> </td>
|
|---|
| 1904 | <td valign="middle" align="left"> </td>
|
|---|
| 1905 | <td valign="middle" align="left"> </td>
|
|---|
| 1906 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1907 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1908 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1909 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1910 | </tr></table>
|
|---|
| 1911 | <h1 class="chapter"> 7. Developers Guide </h1>
|
|---|
| 1912 |
|
|---|
| 1913 | <hr size="6">
|
|---|
| 1914 | <a name="SEC31"></a>
|
|---|
| 1915 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1916 | <tr><td valign="middle" align="left">[<a href="#SEC30" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1917 | <td valign="middle" align="left">[<a href="#SEC32" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1918 | <td valign="middle" align="left"> </td>
|
|---|
| 1919 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1920 | <td valign="middle" align="left">[<a href="#SEC30" title="Up section"> Up </a>]</td>
|
|---|
| 1921 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 1922 | <td valign="middle" align="left"> </td>
|
|---|
| 1923 | <td valign="middle" align="left"> </td>
|
|---|
| 1924 | <td valign="middle" align="left"> </td>
|
|---|
| 1925 | <td valign="middle" align="left"> </td>
|
|---|
| 1926 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1927 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1928 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1929 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1930 | </tr></table>
|
|---|
| 1931 | <h2 class="section"> 7.1 API </h2>
|
|---|
| 1932 | <ul class="toc">
|
|---|
| 1933 | <li> libavcodec is the library containing the codecs (both encoding and
|
|---|
| 1934 | decoding). Look at <tt>`libavcodec/apiexample.c'</tt> to see how to use it.
|
|---|
| 1935 |
|
|---|
| 1936 | </li><li> libavformat is the library containing the file format handling (mux and
|
|---|
| 1937 | demux code for several formats). Look at <tt>`ffplay.c'</tt> to use it in a
|
|---|
| 1938 | player. See <tt>`output_example.c'</tt> to use it to generate audio or video
|
|---|
| 1939 | streams.
|
|---|
| 1940 |
|
|---|
| 1941 | </li></ul>
|
|---|
| 1942 |
|
|---|
| 1943 | <hr size="6">
|
|---|
| 1944 | <a name="SEC32"></a>
|
|---|
| 1945 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1946 | <tr><td valign="middle" align="left">[<a href="#SEC31" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1947 | <td valign="middle" align="left">[<a href="#SEC33" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1948 | <td valign="middle" align="left"> </td>
|
|---|
| 1949 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1950 | <td valign="middle" align="left">[<a href="#SEC30" title="Up section"> Up </a>]</td>
|
|---|
| 1951 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 1952 | <td valign="middle" align="left"> </td>
|
|---|
| 1953 | <td valign="middle" align="left"> </td>
|
|---|
| 1954 | <td valign="middle" align="left"> </td>
|
|---|
| 1955 | <td valign="middle" align="left"> </td>
|
|---|
| 1956 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1957 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1958 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1959 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1960 | </tr></table>
|
|---|
| 1961 | <h2 class="section"> 7.2 Integrating libavcodec or libavformat in your program </h2>
|
|---|
| 1962 |
|
|---|
| 1963 | <p>You can integrate all the source code of the libraries to link them
|
|---|
| 1964 | statically to avoid any version problem. All you need is to provide a
|
|---|
| 1965 | 'config.mak' and a 'config.h' in the parent directory. See the defines
|
|---|
| 1966 | generated by ./configure to understand what is needed.
|
|---|
| 1967 | </p>
|
|---|
| 1968 | <p>You can use libavcodec or libavformat in your commercial program, but
|
|---|
| 1969 | <em>any patch you make must be published</em>. The best way to proceed is
|
|---|
| 1970 | to send your patches to the FFmpeg mailing list.
|
|---|
| 1971 | </p>
|
|---|
| 1972 | <hr size="6">
|
|---|
| 1973 | <a name="Coding-Rules"></a>
|
|---|
| 1974 | <a name="SEC33"></a>
|
|---|
| 1975 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 1976 | <tr><td valign="middle" align="left">[<a href="#SEC32" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 1977 | <td valign="middle" align="left">[<a href="#SEC34" title="Next section in reading order"> > </a>]</td>
|
|---|
| 1978 | <td valign="middle" align="left"> </td>
|
|---|
| 1979 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 1980 | <td valign="middle" align="left">[<a href="#SEC30" title="Up section"> Up </a>]</td>
|
|---|
| 1981 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 1982 | <td valign="middle" align="left"> </td>
|
|---|
| 1983 | <td valign="middle" align="left"> </td>
|
|---|
| 1984 | <td valign="middle" align="left"> </td>
|
|---|
| 1985 | <td valign="middle" align="left"> </td>
|
|---|
| 1986 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 1987 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 1988 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 1989 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 1990 | </tr></table>
|
|---|
| 1991 | <h2 class="section"> 7.3 Coding Rules </h2>
|
|---|
| 1992 |
|
|---|
| 1993 | <p>FFmpeg is programmed in the ISO C90 language with a few additional
|
|---|
| 1994 | features from ISO C99, namely:
|
|---|
| 1995 | </p><ul>
|
|---|
| 1996 | <li>
|
|---|
| 1997 | the <samp>`inline'</samp> keyword;
|
|---|
| 1998 | </li><li>
|
|---|
| 1999 | <samp>`//'</samp> comments;
|
|---|
| 2000 | </li><li>
|
|---|
| 2001 | designated struct initializers (<samp>`struct s x = { .i = 17 };'</samp>)
|
|---|
| 2002 | </li><li>
|
|---|
| 2003 | compound literals (<samp>`x = (struct s) { 17, 23 };'</samp>)
|
|---|
| 2004 | </li></ul>
|
|---|
| 2005 |
|
|---|
| 2006 | <p>These features are supported by all compilers we care about, so we won't
|
|---|
| 2007 | accept patches to remove their use unless they absolutely don't impair
|
|---|
| 2008 | clarity and performance.
|
|---|
| 2009 | </p>
|
|---|
| 2010 | <p>All code must compile with GCC 2.95 and GCC 3.3. Currently, FFmpeg also
|
|---|
| 2011 | compiles with several other compilers, such as the Compaq ccc compiler
|
|---|
| 2012 | or Sun Studio 9, and we would like to keep it that way unless it would
|
|---|
| 2013 | be exceedingly involved. To ensure compatibility, please don't use any
|
|---|
| 2014 | additional C99 features or GCC extensions. Especially watch out for:
|
|---|
| 2015 | </p><ul>
|
|---|
| 2016 | <li>
|
|---|
| 2017 | mixing statements and declarations;
|
|---|
| 2018 | </li><li>
|
|---|
| 2019 | <samp>`long long'</samp> (use <samp>`int64_t'</samp> instead);
|
|---|
| 2020 | </li><li>
|
|---|
| 2021 | <samp>`__attribute__'</samp> not protected by <samp>`#ifdef __GNUC__'</samp> or similar;
|
|---|
| 2022 | </li><li>
|
|---|
| 2023 | GCC statement expressions (<samp>`(x = ({ int y = 4; y; })'</samp>).
|
|---|
| 2024 | </li></ul>
|
|---|
| 2025 |
|
|---|
| 2026 | <p>Indent size is 4.
|
|---|
| 2027 | The presentation is the one specified by 'indent -i4 -kr -nut'.
|
|---|
| 2028 | The TAB character is forbidden outside of Makefiles as is any
|
|---|
| 2029 | form of trailing whitespace. Commits containing either will be
|
|---|
| 2030 | rejected by the Subversion repository.
|
|---|
| 2031 | </p>
|
|---|
| 2032 | <p>Main priority in FFmpeg is simplicity and small code size (=less
|
|---|
| 2033 | bugs).
|
|---|
| 2034 | </p>
|
|---|
| 2035 | <p>Comments: Use the JavaDoc/Doxygen
|
|---|
| 2036 | format (see examples below) so that code documentation
|
|---|
| 2037 | can be generated automatically. All nontrivial functions should have a comment
|
|---|
| 2038 | above them explaining what the function does, even if it's just one sentence.
|
|---|
| 2039 | All structures and their member variables should be documented, too.
|
|---|
| 2040 | </p><table><tr><td> </td><td><pre class="example">/**
|
|---|
| 2041 | * @file mpeg.c
|
|---|
| 2042 | * MPEG codec.
|
|---|
| 2043 | * @author ...
|
|---|
| 2044 | */
|
|---|
| 2045 |
|
|---|
| 2046 | /**
|
|---|
| 2047 | * Summary sentence.
|
|---|
| 2048 | * more text ...
|
|---|
| 2049 | * ...
|
|---|
| 2050 | */
|
|---|
| 2051 | typedef struct Foobar{
|
|---|
| 2052 | int var1; /**< var1 description */
|
|---|
| 2053 | int var2; ///< var2 description
|
|---|
| 2054 | /** var3 description */
|
|---|
| 2055 | int var3;
|
|---|
| 2056 | } Foobar;
|
|---|
| 2057 |
|
|---|
| 2058 | /**
|
|---|
| 2059 | * Summary sentence.
|
|---|
| 2060 | * more text ...
|
|---|
| 2061 | * ...
|
|---|
| 2062 | * @param my_parameter description of my_parameter
|
|---|
| 2063 | * @return return value description
|
|---|
| 2064 | */
|
|---|
| 2065 | int myfunc(int my_parameter)
|
|---|
| 2066 | ...
|
|---|
| 2067 | </pre></td></tr></table>
|
|---|
| 2068 | <p>fprintf and printf are forbidden in libavformat and libavcodec,
|
|---|
| 2069 | please use av_log() instead.
|
|---|
| 2070 | </p>
|
|---|
| 2071 | <hr size="6">
|
|---|
| 2072 | <a name="Development-Policy"></a>
|
|---|
| 2073 | <a name="SEC34"></a>
|
|---|
| 2074 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 2075 | <tr><td valign="middle" align="left">[<a href="#SEC33" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 2076 | <td valign="middle" align="left">[<a href="#SEC35" title="Next section in reading order"> > </a>]</td>
|
|---|
| 2077 | <td valign="middle" align="left"> </td>
|
|---|
| 2078 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 2079 | <td valign="middle" align="left">[<a href="#SEC30" title="Up section"> Up </a>]</td>
|
|---|
| 2080 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 2081 | <td valign="middle" align="left"> </td>
|
|---|
| 2082 | <td valign="middle" align="left"> </td>
|
|---|
| 2083 | <td valign="middle" align="left"> </td>
|
|---|
| 2084 | <td valign="middle" align="left"> </td>
|
|---|
| 2085 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 2086 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 2087 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 2088 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 2089 | </tr></table>
|
|---|
| 2090 | <h2 class="section"> 7.4 Development Policy </h2>
|
|---|
| 2091 |
|
|---|
| 2092 | <ol>
|
|---|
| 2093 | <li>
|
|---|
| 2094 | You must not commit code which breaks FFmpeg! (Meaning unfinished but
|
|---|
| 2095 | enabled code which breaks compilation or compiles but does not work or
|
|---|
| 2096 | breaks the regression tests)
|
|---|
| 2097 | You can commit unfinished stuff (for testing etc), but it must be disabled
|
|---|
| 2098 | (#ifdef etc) by default so it does not interfere with other developers'
|
|---|
| 2099 | work.
|
|---|
| 2100 | </li><li>
|
|---|
| 2101 | You don't have to over-test things. If it works for you, and you think it
|
|---|
| 2102 | should work for others, then commit. If your code has problems
|
|---|
| 2103 | (portability, triggers compiler bugs, unusual environment etc) they will be
|
|---|
| 2104 | reported and eventually fixed.
|
|---|
| 2105 | </li><li>
|
|---|
| 2106 | Do not commit unrelated changes together, split them into self-contained
|
|---|
| 2107 | pieces.
|
|---|
| 2108 | </li><li>
|
|---|
| 2109 | Do not change behavior of the program (renaming options etc) without
|
|---|
| 2110 | first discussing it on the ffmpeg-devel mailing list. Do not remove
|
|---|
| 2111 | functionality from the code. Just improve!
|
|---|
| 2112 |
|
|---|
| 2113 | <p> Note: Redundant code can be removed.
|
|---|
| 2114 | </p></li><li>
|
|---|
| 2115 | Do not commit changes to the build system (Makefiles, configure script)
|
|---|
| 2116 | which change behavior, defaults etc, without asking first. The same
|
|---|
| 2117 | applies to compiler warning fixes, trivial looking fixes and to code
|
|---|
| 2118 | maintained by other developers. We usually have a reason for doing things
|
|---|
| 2119 | the way we do. Send your changes as patches to the ffmpeg-devel mailing
|
|---|
| 2120 | list, and if the code maintainers say OK, you may commit. This does not
|
|---|
| 2121 | apply to files you wrote and/or maintain.
|
|---|
| 2122 | </li><li>
|
|---|
| 2123 | We refuse source indentation and other cosmetic changes if they are mixed
|
|---|
| 2124 | with functional changes, such commits will be rejected and removed. Every
|
|---|
| 2125 | developer has his own indentation style, you should not change it. Of course
|
|---|
| 2126 | if you (re)write something, you can use your own style, even though we would
|
|---|
| 2127 | prefer if the indentation throughout FFmpeg was consistent (Many projects
|
|---|
| 2128 | force a given indentation style - we don't.). If you really need to make
|
|---|
| 2129 | indentation changes (try to avoid this), separate them strictly from real
|
|---|
| 2130 | changes.
|
|---|
| 2131 |
|
|---|
| 2132 | <p> NOTE: If you had to put if(){ .. } over a large (> 5 lines) chunk of code,
|
|---|
| 2133 | then either do NOT change the indentation of the inner part within (don't
|
|---|
| 2134 | move it to the right)! or do so in a separate commit
|
|---|
| 2135 | </p></li><li>
|
|---|
| 2136 | Always fill out the commit log message. Describe in a few lines what you
|
|---|
| 2137 | changed and why. You can refer to mailing list postings if you fix a
|
|---|
| 2138 | particular bug. Comments such as "fixed!" or "Changed it." are unacceptable.
|
|---|
| 2139 | </li><li>
|
|---|
| 2140 | If you apply a patch by someone else, include the name and email address in
|
|---|
| 2141 | the log message. Since the ffmpeg-cvslog mailing list is publicly
|
|---|
| 2142 | archived you should add some SPAM protection to the email address. Send an
|
|---|
| 2143 | answer to ffmpeg-devel (or wherever you got the patch from) saying that
|
|---|
| 2144 | you applied the patch.
|
|---|
| 2145 | </li><li>
|
|---|
| 2146 | Do NOT commit to code actively maintained by others without permission. Send
|
|---|
| 2147 | a patch to ffmpeg-devel instead.
|
|---|
| 2148 | </li><li>
|
|---|
| 2149 | Subscribe to the ffmpeg-cvslog mailing list. The diffs of all commits
|
|---|
| 2150 | are sent there and reviewed by all the other developers. Bugs and possible
|
|---|
| 2151 | improvements or general questions regarding commits are discussed there. We
|
|---|
| 2152 | expect you to react if problems with your code are uncovered.
|
|---|
| 2153 | </li><li>
|
|---|
| 2154 | Update the documentation if you change behavior or add features. If you are
|
|---|
| 2155 | unsure how best to do this, send a patch to ffmpeg-devel, the documentation
|
|---|
| 2156 | maintainer(s) will review and commit your stuff.
|
|---|
| 2157 | </li><li>
|
|---|
| 2158 | Never write to unallocated memory, never write over the end of arrays,
|
|---|
| 2159 | always check values read from some untrusted source before using them
|
|---|
| 2160 | as array index or other risky things.
|
|---|
| 2161 | </li><li>
|
|---|
| 2162 | Remember to check if you need to bump versions for the specific libav
|
|---|
| 2163 | parts (libavutil, libavcodec, libavformat) you are changing. You need
|
|---|
| 2164 | to change the version integer and the version string.
|
|---|
| 2165 | Incrementing the first component means no backward compatibility to
|
|---|
| 2166 | previous versions (e.g. removal of a function).
|
|---|
| 2167 | Incrementing the second component means backward compatible change
|
|---|
| 2168 | (e.g. addition of a function).
|
|---|
| 2169 | Incrementing the third component means a noteworthy binary compatible
|
|---|
| 2170 | change (e.g. encoder bug fix that matters for the decoder).
|
|---|
| 2171 | </li><li>
|
|---|
| 2172 | If you add a new codec, remember to update the changelog, add it to
|
|---|
| 2173 | the supported codecs table in the documentation and bump the second
|
|---|
| 2174 | component of the <tt>`libavcodec'</tt> version number appropriately. If
|
|---|
| 2175 | it has a fourcc, add it to <tt>`libavformat/avienc.c'</tt>, even if it
|
|---|
| 2176 | is only a decoder.
|
|---|
| 2177 | </li></ol>
|
|---|
| 2178 |
|
|---|
| 2179 | <p>We think our rules are not too hard. If you have comments, contact us.
|
|---|
| 2180 | </p>
|
|---|
| 2181 | <p>Note, these rules are mostly borrowed from the MPlayer project.
|
|---|
| 2182 | </p>
|
|---|
| 2183 | <hr size="6">
|
|---|
| 2184 | <a name="SEC35"></a>
|
|---|
| 2185 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 2186 | <tr><td valign="middle" align="left">[<a href="#SEC34" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 2187 | <td valign="middle" align="left">[<a href="#SEC36" title="Next section in reading order"> > </a>]</td>
|
|---|
| 2188 | <td valign="middle" align="left"> </td>
|
|---|
| 2189 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 2190 | <td valign="middle" align="left">[<a href="#SEC34" title="Up section"> Up </a>]</td>
|
|---|
| 2191 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 2192 | <td valign="middle" align="left"> </td>
|
|---|
| 2193 | <td valign="middle" align="left"> </td>
|
|---|
| 2194 | <td valign="middle" align="left"> </td>
|
|---|
| 2195 | <td valign="middle" align="left"> </td>
|
|---|
| 2196 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 2197 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 2198 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 2199 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 2200 | </tr></table>
|
|---|
| 2201 | <h3 class="subsection"> 7.4.1 Renaming/moving files or content of files </h3>
|
|---|
| 2202 | <p> You CANNOT do that. Post a request for such a change to the mailing list
|
|---|
| 2203 | Do NOT remove & readd a file - it will kill the changelog!!!!
|
|---|
| 2204 | </p>
|
|---|
| 2205 | <hr size="6">
|
|---|
| 2206 | <a name="SEC36"></a>
|
|---|
| 2207 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 2208 | <tr><td valign="middle" align="left">[<a href="#SEC35" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 2209 | <td valign="middle" align="left">[<a href="#SEC37" title="Next section in reading order"> > </a>]</td>
|
|---|
| 2210 | <td valign="middle" align="left"> </td>
|
|---|
| 2211 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 2212 | <td valign="middle" align="left">[<a href="#SEC30" title="Up section"> Up </a>]</td>
|
|---|
| 2213 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 2214 | <td valign="middle" align="left"> </td>
|
|---|
| 2215 | <td valign="middle" align="left"> </td>
|
|---|
| 2216 | <td valign="middle" align="left"> </td>
|
|---|
| 2217 | <td valign="middle" align="left"> </td>
|
|---|
| 2218 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 2219 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 2220 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 2221 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 2222 | </tr></table>
|
|---|
| 2223 | <h2 class="section"> 7.5 Submitting patches </h2>
|
|---|
| 2224 |
|
|---|
| 2225 | <p>First, (see section <a href="#SEC33">Coding Rules</a>) above if you didn't yet.
|
|---|
| 2226 | </p>
|
|---|
| 2227 | <p>When you submit your patch, try to send a unified diff (diff '-up'
|
|---|
| 2228 | option). I cannot read other diffs :-)
|
|---|
| 2229 | </p>
|
|---|
| 2230 | <p>Also please do not submit patches which contain several unrelated changes.
|
|---|
| 2231 | Split them into individual self-contained patches; this makes reviewing
|
|---|
| 2232 | them much easier.
|
|---|
| 2233 | </p>
|
|---|
| 2234 | <p>Run the regression tests before submitting a patch so that you can
|
|---|
| 2235 | verify that there are no big problems.
|
|---|
| 2236 | </p>
|
|---|
| 2237 | <p>Patches should be posted as base64 encoded attachments (or any other
|
|---|
| 2238 | encoding which ensures that the patch won't be trashed during
|
|---|
| 2239 | transmission) to the ffmpeg-devel mailing list, see
|
|---|
| 2240 | <a href="http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel">http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel</a>
|
|---|
| 2241 | </p>
|
|---|
| 2242 | <p>It also helps quite a bit if you tell us what the patch does (for example
|
|---|
| 2243 | 'replaces lrint by lrintf'), and why (for example '*BSD isn't C99 compliant
|
|---|
| 2244 | and has no lrint()')
|
|---|
| 2245 | </p>
|
|---|
| 2246 | <p>We reply to all submitted patches and either apply or reject with some
|
|---|
| 2247 | explanation why, but sometimes we are quite busy so it can take a week or two.
|
|---|
| 2248 | </p>
|
|---|
| 2249 | <hr size="6">
|
|---|
| 2250 | <a name="SEC37"></a>
|
|---|
| 2251 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 2252 | <tr><td valign="middle" align="left">[<a href="#SEC36" title="Previous section in reading order"> < </a>]</td>
|
|---|
| 2253 | <td valign="middle" align="left">[ > ]</td>
|
|---|
| 2254 | <td valign="middle" align="left"> </td>
|
|---|
| 2255 | <td valign="middle" align="left">[<a href="#SEC30" title="Beginning of this chapter or previous chapter"> << </a>]</td>
|
|---|
| 2256 | <td valign="middle" align="left">[<a href="#SEC30" title="Up section"> Up </a>]</td>
|
|---|
| 2257 | <td valign="middle" align="left">[ >> ]</td>
|
|---|
| 2258 | <td valign="middle" align="left"> </td>
|
|---|
| 2259 | <td valign="middle" align="left"> </td>
|
|---|
| 2260 | <td valign="middle" align="left"> </td>
|
|---|
| 2261 | <td valign="middle" align="left"> </td>
|
|---|
| 2262 | <td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 2263 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 2264 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 2265 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 2266 | </tr></table>
|
|---|
| 2267 | <h2 class="section"> 7.6 Regression tests </h2>
|
|---|
| 2268 |
|
|---|
| 2269 | <p>Before submitting a patch (or committing to the repository), you should at least
|
|---|
| 2270 | test that you did not break anything.
|
|---|
| 2271 | </p>
|
|---|
| 2272 | <p>The regression tests build a synthetic video stream and a synthetic
|
|---|
| 2273 | audio stream. These are then encoded and decoded with all codecs or
|
|---|
| 2274 | formats. The CRC (or MD5) of each generated file is recorded in a
|
|---|
| 2275 | result file. A 'diff' is launched to compare the reference results and
|
|---|
| 2276 | the result file.
|
|---|
| 2277 | </p>
|
|---|
| 2278 | <p>The regression tests then go on to test the FFserver code with a
|
|---|
| 2279 | limited set of streams. It is important that this step runs correctly
|
|---|
| 2280 | as well.
|
|---|
| 2281 | </p>
|
|---|
| 2282 | <p>Run 'make test' to test all the codecs and formats.
|
|---|
| 2283 | </p>
|
|---|
| 2284 | <p>Run 'make fulltest' to test all the codecs, formats and FFserver.
|
|---|
| 2285 | </p>
|
|---|
| 2286 | <p>[Of course, some patches may change the results of the regression tests. In
|
|---|
| 2287 | this case, the reference results of the regression tests shall be modified
|
|---|
| 2288 | accordingly].
|
|---|
| 2289 | </p>
|
|---|
| 2290 | <hr size="6">
|
|---|
| 2291 | <a name="SEC_About"></a>
|
|---|
| 2292 | <table cellpadding="1" cellspacing="1" border="0">
|
|---|
| 2293 | <tr><td valign="middle" align="left">[<a href="#SEC1" title="Cover (top) of document">Top</a>]</td>
|
|---|
| 2294 | <td valign="middle" align="left">[Contents]</td>
|
|---|
| 2295 | <td valign="middle" align="left">[Index]</td>
|
|---|
| 2296 | <td valign="middle" align="left">[<a href="#SEC_About" title="About (help)"> ? </a>]</td>
|
|---|
| 2297 | </tr></table>
|
|---|
| 2298 | <h1>About This Document</h1>
|
|---|
| 2299 | <p>
|
|---|
| 2300 | This document was generated on <i>June, 30 2006</i> using <a href="http://texi2html.cvshome.org/"><i>texi2html 1.76</i></a>.
|
|---|
| 2301 | </p>
|
|---|
| 2302 | <p>
|
|---|
| 2303 | The buttons in the navigation panels have the following meaning:
|
|---|
| 2304 | </p>
|
|---|
| 2305 | <table border="1">
|
|---|
| 2306 | <tr>
|
|---|
| 2307 | <th> Button </th>
|
|---|
| 2308 | <th> Name </th>
|
|---|
| 2309 | <th> Go to </th>
|
|---|
| 2310 | <th> From 1.2.3 go to</th>
|
|---|
| 2311 | </tr>
|
|---|
| 2312 | <tr>
|
|---|
| 2313 | <td align="center"> [ < ] </td>
|
|---|
| 2314 | <td align="center">Back</td>
|
|---|
| 2315 | <td>previous section in reading order</td>
|
|---|
| 2316 | <td>1.2.2</td>
|
|---|
| 2317 | </tr>
|
|---|
| 2318 | <tr>
|
|---|
| 2319 | <td align="center"> [ > ] </td>
|
|---|
| 2320 | <td align="center">Forward</td>
|
|---|
| 2321 | <td>next section in reading order</td>
|
|---|
| 2322 | <td>1.2.4</td>
|
|---|
| 2323 | </tr>
|
|---|
| 2324 | <tr>
|
|---|
| 2325 | <td align="center"> [ << ] </td>
|
|---|
| 2326 | <td align="center">FastBack</td>
|
|---|
| 2327 | <td>beginning of this chapter or previous chapter</td>
|
|---|
| 2328 | <td>1</td>
|
|---|
| 2329 | </tr>
|
|---|
| 2330 | <tr>
|
|---|
| 2331 | <td align="center"> [ Up ] </td>
|
|---|
| 2332 | <td align="center">Up</td>
|
|---|
| 2333 | <td>up section</td>
|
|---|
| 2334 | <td>1.2</td>
|
|---|
| 2335 | </tr>
|
|---|
| 2336 | <tr>
|
|---|
| 2337 | <td align="center"> [ >> ] </td>
|
|---|
| 2338 | <td align="center">FastForward</td>
|
|---|
| 2339 | <td>next chapter</td>
|
|---|
| 2340 | <td>2</td>
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| 2341 | </tr>
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| 2342 | <tr>
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| 2343 | <td align="center"> [Top] </td>
|
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| 2344 | <td align="center">Top</td>
|
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| 2345 | <td>cover (top) of document</td>
|
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| 2346 | <td> </td>
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| 2347 | </tr>
|
|---|
| 2348 | <tr>
|
|---|
| 2349 | <td align="center"> [Contents] </td>
|
|---|
| 2350 | <td align="center">Contents</td>
|
|---|
| 2351 | <td>table of contents</td>
|
|---|
| 2352 | <td> </td>
|
|---|
| 2353 | </tr>
|
|---|
| 2354 | <tr>
|
|---|
| 2355 | <td align="center"> [Index] </td>
|
|---|
| 2356 | <td align="center">Index</td>
|
|---|
| 2357 | <td>index</td>
|
|---|
| 2358 | <td> </td>
|
|---|
| 2359 | </tr>
|
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| 2360 | <tr>
|
|---|
| 2361 | <td align="center"> [ ? ] </td>
|
|---|
| 2362 | <td align="center">About</td>
|
|---|
| 2363 | <td>about (help)</td>
|
|---|
| 2364 | <td> </td>
|
|---|
| 2365 | </tr>
|
|---|
| 2366 | </table>
|
|---|
| 2367 |
|
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| 2368 | <p>
|
|---|
| 2369 | where the <strong> Example </strong> assumes that the current position is at <strong> Subsubsection One-Two-Three </strong> of a document of the following structure:
|
|---|
| 2370 | </p>
|
|---|
| 2371 |
|
|---|
| 2372 | <ul>
|
|---|
| 2373 | <li> 1. Section One
|
|---|
| 2374 | <ul>
|
|---|
| 2375 | <li>1.1 Subsection One-One
|
|---|
| 2376 | <ul>
|
|---|
| 2377 | <li>...</li>
|
|---|
| 2378 | </ul>
|
|---|
| 2379 | </li>
|
|---|
| 2380 | <li>1.2 Subsection One-Two
|
|---|
| 2381 | <ul>
|
|---|
| 2382 | <li>1.2.1 Subsubsection One-Two-One</li>
|
|---|
| 2383 | <li>1.2.2 Subsubsection One-Two-Two</li>
|
|---|
| 2384 | <li>1.2.3 Subsubsection One-Two-Three
|
|---|
| 2385 | <strong><== Current Position </strong></li>
|
|---|
| 2386 | <li>1.2.4 Subsubsection One-Two-Four</li>
|
|---|
| 2387 | </ul>
|
|---|
| 2388 | </li>
|
|---|
| 2389 | <li>1.3 Subsection One-Three
|
|---|
| 2390 | <ul>
|
|---|
| 2391 | <li>...</li>
|
|---|
| 2392 | </ul>
|
|---|
| 2393 | </li>
|
|---|
| 2394 | <li>1.4 Subsection One-Four</li>
|
|---|
| 2395 | </ul>
|
|---|
| 2396 | </li>
|
|---|
| 2397 | </ul>
|
|---|
| 2398 |
|
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| 2399 | <hr size="1">
|
|---|
| 2400 | <p>
|
|---|
| 2401 | <font size="-1">
|
|---|
| 2402 | This document was generated on <i>June, 30 2006</i> using <a href="http://texi2html.cvshome.org/"><i>texi2html 1.76</i></a>.
|
|---|
| 2403 | </font>
|
|---|
| 2404 | <br>
|
|---|
| 2405 |
|
|---|
| 2406 | </p>
|
|---|
| 2407 | </body>
|
|---|
| 2408 | </html>
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