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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

  2. <html>

  3. <!-- Created by GNU Texinfo 6.8, https://www.gnu.org/software/texinfo/ -->

  4.   <head>

  5.     <meta charset="utf-8">

  6.     <title>

  7.       NUT

  8.     </title>

  9.     <meta name="viewport" content="width=device-width,initial-scale=1.0">

  10.     <link rel="stylesheet" type="text/css" href="bootstrap.min.css">

  11.     <link rel="stylesheet" type="text/css" href="style.min.css">

  12.   </head>

  13.   <body>

  14.     <div class="container">

  15.       <h1>

  16.       NUT

  17.       </h1>

  18. <div align="center">

  19. </div>

  20. 

  21. 

  22. 

  23. <a name="SEC_Top"></a>

  24. 

  25. <div class="Contents_element" id="SEC_Contents">

  26. <h2 class="contents-heading">Table of Contents</h2>

  27. 

  28. <div class="contents">

  29. 

  30. <ul class="no-bullet">

  31.   <li><a id="toc-Description" href="#Description">1 Description</a></li>

  32.   <li><a id="toc-Modes" href="#Modes">2 Modes</a>

  33.   <ul class="no-bullet">

  34.     <li><a id="toc-BROADCAST" href="#BROADCAST">2.1 BROADCAST</a></li>

  35.     <li><a id="toc-PIPE" href="#PIPE">2.2 PIPE</a></li>

  36.   </ul></li>

  37.   <li><a id="toc-Container_002dspecific-codec-tags" href="#Container_002dspecific-codec-tags">3 Container-specific codec tags</a>

  38.   <ul class="no-bullet">

  39.     <li><a id="toc-Generic-raw-YUVA-formats" href="#Generic-raw-YUVA-formats">3.1 Generic raw YUVA formats</a></li>

  40.     <li><a id="toc-Raw-Audio" href="#Raw-Audio">3.2 Raw Audio</a></li>

  41.     <li><a id="toc-Subtitles" href="#Subtitles">3.3 Subtitles</a></li>

  42.     <li><a id="toc-Raw-Data" href="#Raw-Data">3.4 Raw Data</a></li>

  43.     <li><a id="toc-Codecs" href="#Codecs">3.5 Codecs</a></li>

  44.   </ul></li>

  45. </ul>

  46. </div>

  47. </div>

  48. 

  49. <a name="Description"></a>

  50. <h2 class="chapter">1 Description<span class="pull-right"><a class="anchor hidden-xs" href="#Description" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Description" aria-hidden="true">TOC</a></span></h2>

  51. <p>NUT is a low overhead generic container format. It stores audio, video,

  52. subtitle and user-defined streams in a simple, yet efficient, way.

  53. </p>

  54. <p>It was created by a group of FFmpeg and MPlayer developers in 2003

  55. and was finalized in 2008.

  56. </p>

  57. <p>The official nut specification is at svn://svn.mplayerhq.hu/nut

  58. In case of any differences between this text and the official specification,

  59. the official specification shall prevail.

  60. </p>

  61. <a name="Modes"></a>

  62. <h2 class="chapter">2 Modes<span class="pull-right"><a class="anchor hidden-xs" href="#Modes" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Modes" aria-hidden="true">TOC</a></span></h2>

  63. <p>NUT has some variants signaled by using the flags field in its main header.

  64. </p>

  65. <table>

  66. <tr><td width="40%">BROADCAST</td><td width="40%">Extend the syncpoint to report the sender wallclock</td></tr>

  67. <tr><td width="40%">PIPE</td><td width="40%">Omit completely the syncpoint</td></tr>

  68. </table>

  69. 

  70. <a name="BROADCAST"></a>

  71. <h3 class="section">2.1 BROADCAST<span class="pull-right"><a class="anchor hidden-xs" href="#BROADCAST" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-BROADCAST" aria-hidden="true">TOC</a></span></h3>

  72. 

  73. <p>The BROADCAST variant provides a secondary time reference to facilitate

  74. detecting endpoint latency and network delays.

  75. It assumes all the endpoint clocks are synchronized.

  76. To be used in real-time scenarios.

  77. </p>

  78. <a name="PIPE"></a>

  79. <h3 class="section">2.2 PIPE<span class="pull-right"><a class="anchor hidden-xs" href="#PIPE" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-PIPE" aria-hidden="true">TOC</a></span></h3>

  80. 

  81. <p>The PIPE variant assumes NUT is used as non-seekable intermediate container,

  82. by not using syncpoint removes unneeded overhead and reduces the overall

  83. memory usage.

  84. </p>

  85. <a name="Container_002dspecific-codec-tags"></a>

  86. <h2 class="chapter">3 Container-specific codec tags<span class="pull-right"><a class="anchor hidden-xs" href="#Container_002dspecific-codec-tags" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Container_002dspecific-codec-tags" aria-hidden="true">TOC</a></span></h2>

  87. 

  88. <a name="Generic-raw-YUVA-formats"></a>

  89. <h3 class="section">3.1 Generic raw YUVA formats<span class="pull-right"><a class="anchor hidden-xs" href="#Generic-raw-YUVA-formats" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Generic-raw-YUVA-formats" aria-hidden="true">TOC</a></span></h3>

  90. 

  91. <p>Since many exotic planar YUVA pixel formats are not considered by

  92. the AVI/QuickTime FourCC lists, the following scheme is adopted for

  93. representing them.

  94. </p>

  95. <p>The first two bytes can contain the values:

  96. Y1 = only Y

  97. Y2 = Y+A

  98. Y3 = YUV

  99. Y4 = YUVA

  100. </p>

  101. <p>The third byte represents the width and height chroma subsampling

  102. values for the UV planes, that is the amount to shift the luma

  103. width/height right to find the chroma width/height.

  104. </p>

  105. <p>The fourth byte is the number of bits used (8, 16, ...).

  106. </p>

  107. <p>If the order of bytes is inverted, that means that each component has

  108. to be read big-endian.

  109. </p>

  110. <a name="Raw-Audio"></a>

  111. <h3 class="section">3.2 Raw Audio<span class="pull-right"><a class="anchor hidden-xs" href="#Raw-Audio" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Raw-Audio" aria-hidden="true">TOC</a></span></h3>

  112. 

  113. <table>

  114. <tr><td width="40%">ALAW</td><td width="40%">A-LAW</td></tr>

  115. <tr><td width="40%">ULAW</td><td width="40%">MU-LAW</td></tr>

  116. <tr><td width="40%">P&lt;type&gt;&lt;interleaving&gt;&lt;bits&gt;</td><td width="40%">little-endian PCM</td></tr>

  117. <tr><td width="40%">&lt;bits&gt;&lt;interleaving&gt;&lt;type&gt;P</td><td width="40%">big-endian PCM</td></tr>

  118. </table>

  119. 

  120. <p>&lt;type&gt; is S for signed integer, U for unsigned integer, F for IEEE float

  121. &lt;interleaving&gt; is D for default, P is for planar.

  122. &lt;bits&gt; is 8/16/24/32

  123. </p>

  124. <div class="example">

  125. <pre class="example">PFD[32]   would for example be signed 32 bit little-endian IEEE float

  126. </pre></div>

  127. 

  128. <a name="Subtitles"></a>

  129. <h3 class="section">3.3 Subtitles<span class="pull-right"><a class="anchor hidden-xs" href="#Subtitles" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Subtitles" aria-hidden="true">TOC</a></span></h3>

  130. 

  131. <table>

  132. <tr><td width="40%">UTF8</td><td width="40%">Raw UTF-8</td></tr>

  133. <tr><td width="40%">SSA[0]</td><td width="40%">SubStation Alpha</td></tr>

  134. <tr><td width="40%">DVDS</td><td width="40%">DVD subtitles</td></tr>

  135. <tr><td width="40%">DVBS</td><td width="40%">DVB subtitles</td></tr>

  136. </table>

  137. 

  138. <a name="Raw-Data"></a>

  139. <h3 class="section">3.4 Raw Data<span class="pull-right"><a class="anchor hidden-xs" href="#Raw-Data" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Raw-Data" aria-hidden="true">TOC</a></span></h3>

  140. 

  141. <table>

  142. <tr><td width="40%">UTF8</td><td width="40%">Raw UTF-8</td></tr>

  143. </table>

  144. 

  145. <a name="Codecs"></a>

  146. <h3 class="section">3.5 Codecs<span class="pull-right"><a class="anchor hidden-xs" href="#Codecs" aria-hidden="true">#</a> <a class="anchor hidden-xs"href="#toc-Codecs" aria-hidden="true">TOC</a></span></h3>

  147. 

  148. <table>

  149. <tr><td width="40%">3IV1</td><td width="40%">non-compliant MPEG-4 generated by old 3ivx</td></tr>

  150. <tr><td width="40%">ASV1</td><td width="40%">Asus Video</td></tr>

  151. <tr><td width="40%">ASV2</td><td width="40%">Asus Video 2</td></tr>

  152. <tr><td width="40%">CVID</td><td width="40%">Cinepak</td></tr>

  153. <tr><td width="40%">CYUV</td><td width="40%">Creative YUV</td></tr>

  154. <tr><td width="40%">DIVX</td><td width="40%">non-compliant MPEG-4 generated by old DivX</td></tr>

  155. <tr><td width="40%">DUCK</td><td width="40%">Truemotion 1</td></tr>

  156. <tr><td width="40%">FFV1</td><td width="40%">FFmpeg video 1</td></tr>

  157. <tr><td width="40%">FFVH</td><td width="40%">FFmpeg Huffyuv</td></tr>

  158. <tr><td width="40%">H261</td><td width="40%">ITU H.261</td></tr>

  159. <tr><td width="40%">H262</td><td width="40%">ITU H.262</td></tr>

  160. <tr><td width="40%">H263</td><td width="40%">ITU H.263</td></tr>

  161. <tr><td width="40%">H264</td><td width="40%">ITU H.264</td></tr>

  162. <tr><td width="40%">HFYU</td><td width="40%">Huffyuv</td></tr>

  163. <tr><td width="40%">I263</td><td width="40%">Intel H.263</td></tr>

  164. <tr><td width="40%">IV31</td><td width="40%">Indeo 3.1</td></tr>

  165. <tr><td width="40%">IV32</td><td width="40%">Indeo 3.2</td></tr>

  166. <tr><td width="40%">IV50</td><td width="40%">Indeo 5.0</td></tr>

  167. <tr><td width="40%">LJPG</td><td width="40%">ITU JPEG (lossless)</td></tr>

  168. <tr><td width="40%">MJLS</td><td width="40%">ITU JPEG-LS</td></tr>

  169. <tr><td width="40%">MJPG</td><td width="40%">ITU JPEG</td></tr>

  170. <tr><td width="40%">MPG4</td><td width="40%">MS MPEG-4v1 (not ISO MPEG-4)</td></tr>

  171. <tr><td width="40%">MP42</td><td width="40%">MS MPEG-4v2</td></tr>

  172. <tr><td width="40%">MP43</td><td width="40%">MS MPEG-4v3</td></tr>

  173. <tr><td width="40%">MP4V</td><td width="40%">ISO MPEG-4 Part 2 Video (from old encoders)</td></tr>

  174. <tr><td width="40%">mpg1</td><td width="40%">ISO MPEG-1 Video</td></tr>

  175. <tr><td width="40%">mpg2</td><td width="40%">ISO MPEG-2 Video</td></tr>

  176. <tr><td width="40%">MRLE</td><td width="40%">MS RLE</td></tr>

  177. <tr><td width="40%">MSVC</td><td width="40%">MS Video 1</td></tr>

  178. <tr><td width="40%">RT21</td><td width="40%">Indeo 2.1</td></tr>

  179. <tr><td width="40%">RV10</td><td width="40%">RealVideo 1.0</td></tr>

  180. <tr><td width="40%">RV20</td><td width="40%">RealVideo 2.0</td></tr>

  181. <tr><td width="40%">RV30</td><td width="40%">RealVideo 3.0</td></tr>

  182. <tr><td width="40%">RV40</td><td width="40%">RealVideo 4.0</td></tr>

  183. <tr><td width="40%">SNOW</td><td width="40%">FFmpeg Snow</td></tr>

  184. <tr><td width="40%">SVQ1</td><td width="40%">Sorenson Video 1</td></tr>

  185. <tr><td width="40%">SVQ3</td><td width="40%">Sorenson Video 3</td></tr>

  186. <tr><td width="40%">theo</td><td width="40%">Xiph Theora</td></tr>

  187. <tr><td width="40%">TM20</td><td width="40%">Truemotion 2.0</td></tr>

  188. <tr><td width="40%">UMP4</td><td width="40%">non-compliant MPEG-4 generated by UB Video MPEG-4</td></tr>

  189. <tr><td width="40%">VCR1</td><td width="40%">ATI VCR1</td></tr>

  190. <tr><td width="40%">VP30</td><td width="40%">VP 3.0</td></tr>

  191. <tr><td width="40%">VP31</td><td width="40%">VP 3.1</td></tr>

  192. <tr><td width="40%">VP50</td><td width="40%">VP 5.0</td></tr>

  193. <tr><td width="40%">VP60</td><td width="40%">VP 6.0</td></tr>

  194. <tr><td width="40%">VP61</td><td width="40%">VP 6.1</td></tr>

  195. <tr><td width="40%">VP62</td><td width="40%">VP 6.2</td></tr>

  196. <tr><td width="40%">VP70</td><td width="40%">VP 7.0</td></tr>

  197. <tr><td width="40%">WMV1</td><td width="40%">MS WMV7</td></tr>

  198. <tr><td width="40%">WMV2</td><td width="40%">MS WMV8</td></tr>

  199. <tr><td width="40%">WMV3</td><td width="40%">MS WMV9</td></tr>

  200. <tr><td width="40%">WV1F</td><td width="40%">non-compliant MPEG-4 generated by ?</td></tr>

  201. <tr><td width="40%">WVC1</td><td width="40%">VC-1</td></tr>

  202. <tr><td width="40%">XVID</td><td width="40%">non-compliant MPEG-4 generated by old Xvid</td></tr>

  203. <tr><td width="40%">XVIX</td><td width="40%">non-compliant MPEG-4 generated by old Xvid with interlacing bug</td></tr>

  204. </table>

  205. 

  206.       <p style="font-size: small;">

  207.         This document was generated using <a href="https://www.gnu.org/software/texinfo/"><em>makeinfo</em></a>.

  208.       </p>

  209.     </div>

  210.   </body>

  211. </html>