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  14 <head>
  15 <title>FFmpeg documentation : NUT: </title>
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  28
  29 <a name="SEC_Top"></a>
  30 <h1 class="settitle">NUT</h1>
  31
  32 <a name="SEC_Contents"></a>
  33 <h1>Table of Contents</h1>
  34 <div class="contents">
  35
  36 <ul class="toc">
  37   <li><a name="toc-Description" href="#Description">1. Description</a></li>
  38   <li><a name="toc-Container_002dspecific-codec-tags" href="#Container_002dspecific-codec-tags">2. Container-specific codec tags</a>
  39   <ul class="toc">
  40     <li><a name="toc-Generic-raw-YUVA-formats" href="#Generic-raw-YUVA-formats">2.1 Generic raw YUVA formats</a></li>
  41     <li><a name="toc-Raw-Audio" href="#Raw-Audio">2.2 Raw Audio</a></li>
  42     <li><a name="toc-Subtitles" href="#Subtitles">2.3 Subtitles</a></li>
  43     <li><a name="toc-Raw-Data" href="#Raw-Data">2.4 Raw Data</a></li>
  44     <li><a name="toc-Codecs" href="#Codecs">2.5 Codecs</a></li>
  45   </ul>
  46 </li>
  47 </ul>
  48 </div>
  49
  50 <a name="Description"></a>
  51 <h1 class="chapter"><a href="nut.html#toc-Description">1. Description</a></h1>
  52 <p>NUT is a low overhead generic container format. It stores audio, video,
  53 subtitle and user-defined streams in a simple, yet efficient, way.
  54 </p>
  55 <p>It was created by a group of FFmpeg and MPlayer developers in 2003
  56 and was finalized in 2008.
  57 </p>
  58 <p>The official nut specification is at svn://svn.mplayerhq.hu/nut
  59 In case of any differences between this text and the official specification,
  60 the official specification shall prevail.
  61 </p>
  62 <a name="Container_002dspecific-codec-tags"></a>
  63 <h1 class="chapter"><a href="nut.html#toc-Container_002dspecific-codec-tags">2. Container-specific codec tags</a></h1>
  64
  65 <a name="Generic-raw-YUVA-formats"></a>
  66 <h2 class="section"><a href="nut.html#toc-Generic-raw-YUVA-formats">2.1 Generic raw YUVA formats</a></h2>
  67
  68 <p>Since many exotic planar YUVA pixel formats are not considered by
  69 the AVI/QuickTime FourCC lists, the following scheme is adopted for
  70 representing them.
  71 </p>
  72 <p>The first two bytes can contain the values:
  73 Y1 = only Y
  74 Y2 = Y+A
  75 Y3 = YUV
  76 Y4 = YUVA
  77 </p>
  78 <p>The third byte represents the width and height chroma subsampling
  79 values for the UV planes, that is the amount to shift the luma
  80 width/height right to find the chroma width/height.
  81 </p>
  82 <p>The fourth byte is the number of bits used (8, 16, ...).
  83 </p>
  84 <p>If the order of bytes is inverted, that means that each component has
  85 to be read big-endian.
  86 </p>
  87 <a name="Raw-Audio"></a>
  88 <h2 class="section"><a href="nut.html#toc-Raw-Audio">2.2 Raw Audio</a></h2>
  89
  90 <table>
  91 <tr><td width="40%">ALAW</td><td width="40%">A-LAW</td></tr>
  92 <tr><td width="40%">ULAW</td><td width="40%">MU-LAW</td></tr>
  93 <tr><td width="40%">P&lt;type&gt;&lt;interleaving&gt;&lt;bits&gt;</td><td width="40%">little-endian PCM</td></tr>
  94 <tr><td width="40%">&lt;bits&gt;&lt;interleaving&gt;&lt;type&gt;P</td><td width="40%">big-endian PCM</td></tr>
  95 </table>
  96
  97 <p>&lt;type&gt; is S for signed integer, U for unsigned integer, F for IEEE float
  98 &lt;interleaving&gt; is D for default, P is for planar.
  99 &lt;bits&gt; is 8/16/24/32
 100 </p>
 101 <table><tr><td>&nbsp;</td><td><pre class="example">PFD[32]   would for example be signed 32 bit little-endian IEEE float
 102 </pre></td></tr></table>
 103
 104 <a name="Subtitles"></a>
 105 <h2 class="section"><a href="nut.html#toc-Subtitles">2.3 Subtitles</a></h2>
 106
 107 <table>
 108 <tr><td width="40%">UTF8</td><td width="40%">Raw UTF-8</td></tr>
 109 <tr><td width="40%">SSA[0]</td><td width="40%">SubStation Alpha</td></tr>
 110 <tr><td width="40%">DVDS</td><td width="40%">DVD subtitles</td></tr>
 111 <tr><td width="40%">DVBS</td><td width="40%">DVB subtitles</td></tr>
 112 </table>
 113
 114 <a name="Raw-Data"></a>
 115 <h2 class="section"><a href="nut.html#toc-Raw-Data">2.4 Raw Data</a></h2>
 116
 117 <table>
 118 <tr><td width="40%">UTF8</td><td width="40%">Raw UTF-8</td></tr>
 119 </table>
 120
 121 <a name="Codecs"></a>
 122 <h2 class="section"><a href="nut.html#toc-Codecs">2.5 Codecs</a></h2>
 123
 124 <table>
 125 <tr><td width="40%">3IV1</td><td width="40%">non-compliant MPEG-4 generated by old 3ivx</td></tr>
 126 <tr><td width="40%">ASV1</td><td width="40%">Asus Video</td></tr>
 127 <tr><td width="40%">ASV2</td><td width="40%">Asus Video 2</td></tr>
 128 <tr><td width="40%">CVID</td><td width="40%">Cinepak</td></tr>
 129 <tr><td width="40%">CYUV</td><td width="40%">Creative YUV</td></tr>
 130 <tr><td width="40%">DIVX</td><td width="40%">non-compliant MPEG-4 generated by old DivX</td></tr>
 131 <tr><td width="40%">DUCK</td><td width="40%">Truemotion 1</td></tr>
 132 <tr><td width="40%">FFV1</td><td width="40%">FFmpeg video 1</td></tr>
 133 <tr><td width="40%">FFVH</td><td width="40%">FFmpeg Huffyuv</td></tr>
 134 <tr><td width="40%">H261</td><td width="40%">ITU H.261</td></tr>
 135 <tr><td width="40%">H262</td><td width="40%">ITU H.262</td></tr>
 136 <tr><td width="40%">H263</td><td width="40%">ITU H.263</td></tr>
 137 <tr><td width="40%">H264</td><td width="40%">ITU H.264</td></tr>
 138 <tr><td width="40%">HFYU</td><td width="40%">Huffyuv</td></tr>
 139 <tr><td width="40%">I263</td><td width="40%">Intel H.263</td></tr>
 140 <tr><td width="40%">IV31</td><td width="40%">Indeo 3.1</td></tr>
 141 <tr><td width="40%">IV32</td><td width="40%">Indeo 3.2</td></tr>
 142 <tr><td width="40%">IV50</td><td width="40%">Indeo 5.0</td></tr>
 143 <tr><td width="40%">LJPG</td><td width="40%">ITU JPEG (lossless)</td></tr>
 144 <tr><td width="40%">MJLS</td><td width="40%">ITU JPEG-LS</td></tr>
 145 <tr><td width="40%">MJPG</td><td width="40%">ITU JPEG</td></tr>
 146 <tr><td width="40%">MPG4</td><td width="40%">MS MPEG-4v1 (not ISO MPEG-4)</td></tr>
 147 <tr><td width="40%">MP42</td><td width="40%">MS MPEG-4v2</td></tr>
 148 <tr><td width="40%">MP43</td><td width="40%">MS MPEG-4v3</td></tr>
 149 <tr><td width="40%">MP4V</td><td width="40%">ISO MPEG-4 Part 2 Video (from old encoders)</td></tr>
 150 <tr><td width="40%">mpg1</td><td width="40%">ISO MPEG-1 Video</td></tr>
 151 <tr><td width="40%">mpg2</td><td width="40%">ISO MPEG-2 Video</td></tr>
 152 <tr><td width="40%">MRLE</td><td width="40%">MS RLE</td></tr>
 153 <tr><td width="40%">MSVC</td><td width="40%">MS Video 1</td></tr>
 154 <tr><td width="40%">RT21</td><td width="40%">Indeo 2.1</td></tr>
 155 <tr><td width="40%">RV10</td><td width="40%">RealVideo 1.0</td></tr>
 156 <tr><td width="40%">RV20</td><td width="40%">RealVideo 2.0</td></tr>
 157 <tr><td width="40%">RV30</td><td width="40%">RealVideo 3.0</td></tr>
 158 <tr><td width="40%">RV40</td><td width="40%">RealVideo 4.0</td></tr>
 159 <tr><td width="40%">SNOW</td><td width="40%">FFmpeg Snow</td></tr>
 160 <tr><td width="40%">SVQ1</td><td width="40%">Sorenson Video 1</td></tr>
 161 <tr><td width="40%">SVQ3</td><td width="40%">Sorenson Video 3</td></tr>
 162 <tr><td width="40%">theo</td><td width="40%">Xiph Theora</td></tr>
 163 <tr><td width="40%">TM20</td><td width="40%">Truemotion 2.0</td></tr>
 164 <tr><td width="40%">UMP4</td><td width="40%">non-compliant MPEG-4 generated by UB Video MPEG-4</td></tr>
 165 <tr><td width="40%">VCR1</td><td width="40%">ATI VCR1</td></tr>
 166 <tr><td width="40%">VP30</td><td width="40%">VP 3.0</td></tr>
 167 <tr><td width="40%">VP31</td><td width="40%">VP 3.1</td></tr>
 168 <tr><td width="40%">VP50</td><td width="40%">VP 5.0</td></tr>
 169 <tr><td width="40%">VP60</td><td width="40%">VP 6.0</td></tr>
 170 <tr><td width="40%">VP61</td><td width="40%">VP 6.1</td></tr>
 171 <tr><td width="40%">VP62</td><td width="40%">VP 6.2</td></tr>
 172 <tr><td width="40%">VP70</td><td width="40%">VP 7.0</td></tr>
 173 <tr><td width="40%">WMV1</td><td width="40%">MS WMV7</td></tr>
 174 <tr><td width="40%">WMV2</td><td width="40%">MS WMV8</td></tr>
 175 <tr><td width="40%">WMV3</td><td width="40%">MS WMV9</td></tr>
 176 <tr><td width="40%">WV1F</td><td width="40%">non-compliant MPEG-4 generated by ?</td></tr>
 177 <tr><td width="40%">WVC1</td><td width="40%">VC-1</td></tr>
 178 <tr><td width="40%">XVID</td><td width="40%">non-compliant MPEG-4 generated by old Xvid</td></tr>
 179 <tr><td width="40%">XVIX</td><td width="40%">non-compliant MPEG-4 generated by old Xvid with interlacing bug</td></tr>
 180 </table>
 181
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