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| NUT | |
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| <h1> | |
| NUT | |
| </h1> | |
| <a name="SEC_Top"></a> | |
| <div class="element-contents" id="SEC_Contents"> | |
| <h2 class="contents-heading">Table of Contents</h2> | |
| <div class="contents"> | |
| <ul class="toc-numbered-mark"> | |
| <li><a id="toc-Description" href="#Description">1 Description</a></li> | |
| <li><a id="toc-Modes" href="#Modes">2 Modes</a> | |
| <ul class="toc-numbered-mark"> | |
| <li><a id="toc-BROADCAST" href="#BROADCAST">2.1 BROADCAST</a></li> | |
| <li><a id="toc-PIPE" href="#PIPE">2.2 PIPE</a></li> | |
| </ul></li> | |
| <li><a id="toc-Container_002dspecific-codec-tags" href="#Container_002dspecific-codec-tags">3 Container-specific codec tags</a> | |
| <ul class="toc-numbered-mark"> | |
| <li><a id="toc-Generic-raw-YUVA-formats" href="#Generic-raw-YUVA-formats">3.1 Generic raw YUVA formats</a></li> | |
| <li><a id="toc-Raw-Audio" href="#Raw-Audio">3.2 Raw Audio</a></li> | |
| <li><a id="toc-Subtitles" href="#Subtitles">3.3 Subtitles</a></li> | |
| <li><a id="toc-Raw-Data" href="#Raw-Data">3.4 Raw Data</a></li> | |
| <li><a id="toc-Codecs" href="#Codecs">3.5 Codecs</a></li> | |
| </ul></li> | |
| </ul> | |
| </div> | |
| </div> | |
| <a name="Description"></a> | |
| <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> | |
| <p>NUT is a low overhead generic container format. It stores audio, video, | |
| subtitle and user-defined streams in a simple, yet efficient, way. | |
| </p> | |
| <p>It was created by a group of FFmpeg and MPlayer developers in 2003 | |
| and was finalized in 2008. | |
| </p> | |
| <p>The official nut specification is at svn://svn.mplayerhq.hu/nut | |
| In case of any differences between this text and the official specification, | |
| the official specification shall prevail. | |
| </p> | |
| <a name="Modes"></a> | |
| <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> | |
| <p>NUT has some variants signaled by using the flags field in its main header. | |
| </p> | |
| <table class="multitable"> | |
| <tbody><tr><td width="40%">BROADCAST</td><td width="40%">Extend the syncpoint to report the sender wallclock</td></tr> | |
| <tr><td width="40%">PIPE</td><td width="40%">Omit completely the syncpoint</td></tr> | |
| </tbody> | |
| </table> | |
| <a name="BROADCAST"></a> | |
| <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> | |
| <p>The BROADCAST variant provides a secondary time reference to facilitate | |
| detecting endpoint latency and network delays. | |
| It assumes all the endpoint clocks are synchronized. | |
| To be used in real-time scenarios. | |
| </p> | |
| <a name="PIPE"></a> | |
| <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> | |
| <p>The PIPE variant assumes NUT is used as non-seekable intermediate container, | |
| by not using syncpoint removes unneeded overhead and reduces the overall | |
| memory usage. | |
| </p> | |
| <a name="Container_002dspecific-codec-tags"></a> | |
| <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> | |
| <a name="Generic-raw-YUVA-formats"></a> | |
| <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> | |
| <p>Since many exotic planar YUVA pixel formats are not considered by | |
| the AVI/QuickTime FourCC lists, the following scheme is adopted for | |
| representing them. | |
| </p> | |
| <p>The first two bytes can contain the values: | |
| Y1 = only Y | |
| Y2 = Y+A | |
| Y3 = YUV | |
| Y4 = YUVA | |
| </p> | |
| <p>The third byte represents the width and height chroma subsampling | |
| values for the UV planes, that is the amount to shift the luma | |
| width/height right to find the chroma width/height. | |
| </p> | |
| <p>The fourth byte is the number of bits used (8, 16, ...). | |
| </p> | |
| <p>If the order of bytes is inverted, that means that each component has | |
| to be read big-endian. | |
| </p> | |
| <a name="Raw-Audio"></a> | |
| <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> | |
| <table class="multitable"> | |
| <tbody><tr><td width="40%">ALAW</td><td width="40%">A-LAW</td></tr> | |
| <tr><td width="40%">ULAW</td><td width="40%">MU-LAW</td></tr> | |
| <tr><td width="40%">P<type><interleaving><bits></td><td width="40%">little-endian PCM</td></tr> | |
| <tr><td width="40%"><bits><interleaving><type>P</td><td width="40%">big-endian PCM</td></tr> | |
| </tbody> | |
| </table> | |
| <p><type> is S for signed integer, U for unsigned integer, F for IEEE float | |
| <interleaving> is D for default, P is for planar. | |
| <bits> is 8/16/24/32 | |
| </p> | |
| <div class="example"> | |
| <pre class="example-preformatted">PFD[32] would for example be signed 32 bit little-endian IEEE float | |
| </pre></div> | |
| <a name="Subtitles"></a> | |
| <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> | |
| <table class="multitable"> | |
| <tbody><tr><td width="40%">UTF8</td><td width="40%">Raw UTF-8</td></tr> | |
| <tr><td width="40%">SSA[0]</td><td width="40%">SubStation Alpha</td></tr> | |
| <tr><td width="40%">DVDS</td><td width="40%">DVD subtitles</td></tr> | |
| <tr><td width="40%">DVBS</td><td width="40%">DVB subtitles</td></tr> | |
| </tbody> | |
| </table> | |
| <a name="Raw-Data"></a> | |
| <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> | |
| <table class="multitable"> | |
| <tbody><tr><td width="40%">UTF8</td><td width="40%">Raw UTF-8</td></tr> | |
| </tbody> | |
| </table> | |
| <a name="Codecs"></a> | |
| <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> | |
| <table class="multitable"> | |
| <tbody><tr><td width="40%">3IV1</td><td width="40%">non-compliant MPEG-4 generated by old 3ivx</td></tr> | |
| <tr><td width="40%">ASV1</td><td width="40%">Asus Video</td></tr> | |
| <tr><td width="40%">ASV2</td><td width="40%">Asus Video 2</td></tr> | |
| <tr><td width="40%">CVID</td><td width="40%">Cinepak</td></tr> | |
| <tr><td width="40%">CYUV</td><td width="40%">Creative YUV</td></tr> | |
| <tr><td width="40%">DIVX</td><td width="40%">non-compliant MPEG-4 generated by old DivX</td></tr> | |
| <tr><td width="40%">DUCK</td><td width="40%">Truemotion 1</td></tr> | |
| <tr><td width="40%">FFV1</td><td width="40%">FFmpeg video 1</td></tr> | |
| <tr><td width="40%">FFVH</td><td width="40%">FFmpeg Huffyuv</td></tr> | |
| <tr><td width="40%">H261</td><td width="40%">ITU H.261</td></tr> | |
| <tr><td width="40%">H262</td><td width="40%">ITU H.262</td></tr> | |
| <tr><td width="40%">H263</td><td width="40%">ITU H.263</td></tr> | |
| <tr><td width="40%">H264</td><td width="40%">ITU H.264</td></tr> | |
| <tr><td width="40%">HFYU</td><td width="40%">Huffyuv</td></tr> | |
| <tr><td width="40%">I263</td><td width="40%">Intel H.263</td></tr> | |
| <tr><td width="40%">IV31</td><td width="40%">Indeo 3.1</td></tr> | |
| <tr><td width="40%">IV32</td><td width="40%">Indeo 3.2</td></tr> | |
| <tr><td width="40%">IV50</td><td width="40%">Indeo 5.0</td></tr> | |
| <tr><td width="40%">LJPG</td><td width="40%">ITU JPEG (lossless)</td></tr> | |
| <tr><td width="40%">MJLS</td><td width="40%">ITU JPEG-LS</td></tr> | |
| <tr><td width="40%">MJPG</td><td width="40%">ITU JPEG</td></tr> | |
| <tr><td width="40%">MPG4</td><td width="40%">MS MPEG-4v1 (not ISO MPEG-4)</td></tr> | |
| <tr><td width="40%">MP42</td><td width="40%">MS MPEG-4v2</td></tr> | |
| <tr><td width="40%">MP43</td><td width="40%">MS MPEG-4v3</td></tr> | |
| <tr><td width="40%">MP4V</td><td width="40%">ISO MPEG-4 Part 2 Video (from old encoders)</td></tr> | |
| <tr><td width="40%">mpg1</td><td width="40%">ISO MPEG-1 Video</td></tr> | |
| <tr><td width="40%">mpg2</td><td width="40%">ISO MPEG-2 Video</td></tr> | |
| <tr><td width="40%">MRLE</td><td width="40%">MS RLE</td></tr> | |
| <tr><td width="40%">MSVC</td><td width="40%">MS Video 1</td></tr> | |
| <tr><td width="40%">RT21</td><td width="40%">Indeo 2.1</td></tr> | |
| <tr><td width="40%">RV10</td><td width="40%">RealVideo 1.0</td></tr> | |
| <tr><td width="40%">RV20</td><td width="40%">RealVideo 2.0</td></tr> | |
| <tr><td width="40%">RV30</td><td width="40%">RealVideo 3.0</td></tr> | |
| <tr><td width="40%">RV40</td><td width="40%">RealVideo 4.0</td></tr> | |
| <tr><td width="40%">SNOW</td><td width="40%">FFmpeg Snow</td></tr> | |
| <tr><td width="40%">SVQ1</td><td width="40%">Sorenson Video 1</td></tr> | |
| <tr><td width="40%">SVQ3</td><td width="40%">Sorenson Video 3</td></tr> | |
| <tr><td width="40%">theo</td><td width="40%">Xiph Theora</td></tr> | |
| <tr><td width="40%">TM20</td><td width="40%">Truemotion 2.0</td></tr> | |
| <tr><td width="40%">UMP4</td><td width="40%">non-compliant MPEG-4 generated by UB Video MPEG-4</td></tr> | |
| <tr><td width="40%">VCR1</td><td width="40%">ATI VCR1</td></tr> | |
| <tr><td width="40%">VP30</td><td width="40%">VP 3.0</td></tr> | |
| <tr><td width="40%">VP31</td><td width="40%">VP 3.1</td></tr> | |
| <tr><td width="40%">VP50</td><td width="40%">VP 5.0</td></tr> | |
| <tr><td width="40%">VP60</td><td width="40%">VP 6.0</td></tr> | |
| <tr><td width="40%">VP61</td><td width="40%">VP 6.1</td></tr> | |
| <tr><td width="40%">VP62</td><td width="40%">VP 6.2</td></tr> | |
| <tr><td width="40%">VP70</td><td width="40%">VP 7.0</td></tr> | |
| <tr><td width="40%">WMV1</td><td width="40%">MS WMV7</td></tr> | |
| <tr><td width="40%">WMV2</td><td width="40%">MS WMV8</td></tr> | |
| <tr><td width="40%">WMV3</td><td width="40%">MS WMV9</td></tr> | |
| <tr><td width="40%">WV1F</td><td width="40%">non-compliant MPEG-4 generated by ?</td></tr> | |
| <tr><td width="40%">WVC1</td><td width="40%">VC-1</td></tr> | |
| <tr><td width="40%">XVID</td><td width="40%">non-compliant MPEG-4 generated by old Xvid</td></tr> | |
| <tr><td width="40%">XVIX</td><td width="40%">non-compliant MPEG-4 generated by old Xvid with interlacing bug</td></tr> | |
| </tbody> | |
| </table> | |
| <p style="font-size: small;"> | |
| This document was generated using <a class="uref" href="https://www.gnu.org/software/texinfo/"><em class="emph">makeinfo</em></a>. | |
| </p> | |
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