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| <div class="refentry"> |
| <a name="gst-plugins-good-plugins-mj2mux"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-good-plugins-mj2mux.top_of_page"></a>mj2mux</span></h2> |
| <p>mj2mux — Muxer for Motion JPEG-2000 (.mj2) files</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.properties"></a><h2>Properties</h2> |
| <div class="informaltable"><table border="0"> |
| <colgroup> |
| <col width="150px" class="properties_type"> |
| <col width="300px" class="properties_name"> |
| <col width="200px" class="properties_flags"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="property_type"><span class="type">GstQTMuxDtsMethods</span></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--dts-method" title="The “dts-method” property">dts-method</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--faststart" title="The “faststart” property">faststart</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--faststart-file" title="The “faststart-file” property">faststart-file</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--fragment-duration" title="The “fragment-duration” property">fragment-duration</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--moov-recovery-file" title="The “moov-recovery-file” property">moov-recovery-file</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--movie-timescale" title="The “movie-timescale” property">movie-timescale</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--presentation-time" title="The “presentation-time” property">presentation-time</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--streamable" title="The “streamable” property">streamable</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></td> |
| <td class="property_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--trak-timescale" title="The “trak-timescale” property">trak-timescale</a></td> |
| <td class="property_flags">Read / Write / Construct</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <a name="GstMJ2Mux"></a><div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.other"></a><h2>Types and Values</h2> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="name"> |
| <col class="description"> |
| </colgroup> |
| <tbody><tr> |
| <td class="datatype_keyword"> </td> |
| <td class="function_name"><a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux-struct" title="GstMJ2Mux">GstMJ2Mux</a></td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="screen"> <a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a> |
| <span class="lineart">╰──</span> <a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| <span class="lineart">╰──</span> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a> |
| <span class="lineart">╰──</span> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html">GstElement</a> |
| <span class="lineart">╰──</span> GstMJ2Mux |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.implemented-interfaces"></a><h2>Implemented Interfaces</h2> |
| <p> |
| GstMJ2Mux implements |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstTagSetter.html">GstTagSetter</a> and GstTagXmpWriter.</p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.description"></a><h2>Description</h2> |
| <p>This element merges streams (audio and video) into MJ2 (.mj2) files.</p> |
| <p>The following background intends to explain why various similar muxers |
| are present in this plugin.</p> |
| <p>The <a class="ulink" href="http://www.apple.com/quicktime/resources/qtfileformat.pdf" target="_top"> |
| QuickTime file format specification</a> served as basis for the MP4 file |
| format specification (mp4mux), and as such the QuickTime file structure is |
| nearly identical to the so-called ISO Base Media file format defined in |
| ISO 14496-12 (except for some media specific parts). |
| In turn, the latter ISO Base Media format was further specialized as a |
| Motion JPEG-2000 file format in ISO 15444-3 (mj2mux) |
| and in various 3GPP(2) specs (3gppmux). |
| The fragmented file features defined (only) in ISO Base Media are used by |
| ISMV files making up (a.o.) Smooth Streaming (ismlmux).</p> |
| <p>A few properties (<a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--movie-timescale" title="The “movie-timescale” property"><span class="type">“movie-timescale”</span></a>, <a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--trak-timescale" title="The “trak-timescale” property"><span class="type">“trak-timescale”</span></a>) |
| allow adjusting some technical parameters, which might be useful in (rare) |
| cases to resolve compatibility issues in some situations.</p> |
| <p>Some other properties influence the result more fundamentally. |
| A typical mov/mp4 file's metadata (aka moov) is located at the end of the file, |
| somewhat contrary to this usually being called "the header". However, a |
| <a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--faststart" title="The “faststart” property"><span class="type">“faststart”</span></a> file will (with some effort) arrange this to be located |
| near start of the file, which then allows it e.g. to be played while |
| downloading. Alternatively, rather than having one chunk of metadata at start |
| (or end), there can be some metadata at start and most of the other data can |
| be spread out into fragments of <a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--fragment-duration" title="The “fragment-duration” property"><span class="type">“fragment-duration”</span></a>. If such |
| fragmented layout is intended for streaming purposes, then |
| <a class="link" href="gst-plugins-good-plugins-mj2mux.html#GstMJ2Mux--streamable" title="The “streamable” property"><span class="type">“streamable”</span></a> allows foregoing to add index metadata (at the end of |
| file).</p> |
| <div class="refsect2"> |
| <a name="id-1.2.77.8.7"></a><h3>Example pipelines</h3> |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1</pre></td> |
| <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> v4l2src num<span class="gtkdoc opt">-</span>buffers<span class="gtkdoc opt">=</span><span class="number">50</span> <span class="gtkdoc opt">!</span> queue <span class="gtkdoc opt">!</span> jp2kenc <span class="gtkdoc opt">!</span> mj2mux <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>video<span class="gtkdoc opt">.</span>mj2</pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| |
| Records a video stream captured from a v4l2 device, encodes it into JPEG-2000 |
| and muxes it into an mj2 file. |
| </div> |
| <p>Documentation last reviewed on 2011-04-21</p> |
| <div class="refsynopsisdiv"> |
| <h2>Synopsis</h2> |
| <div class="refsect2"> |
| <a name="id-1.2.77.8.8.1.1"></a><h3>Element Information</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">plugin</span></p></td> |
| <td> |
| <a class="link" href="gst-plugins-good-plugins-plugin-isomp4.html#plugin-isomp4">isomp4</a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term">author</span></p></td> |
| <td>Thiago Sousa Santos <thiagoss@embedded.ufcg.edu.br></td> |
| </tr> |
| <tr> |
| <td><p><span class="term">class</span></p></td> |
| <td>Codec/Muxer</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="id-1.2.77.8.8.1.2"></a><h3>Element Pads</h3> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>audio_%u</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>request</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>audio/x-raw, format=(string){ S8, U8 }, layout=(string)interleaved, channels=(int)[ 1, 2 ], rate=(int)[ 1, 2147483647 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> audio/x-raw, format=(string){ S16LE, S16BE }, layout=(string)interleaved, channels=(int)[ 1, 2 ], rate=(int)[ 1, 2147483647 ]</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>video_%u</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>request</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>image/x-j2c, width=(int)[ 16, 2147483647 ], height=(int)[ 16, 2147483647 ]</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"></span></p></td> |
| <td> image/x-jpc, width=(int)[ 16, 2147483647 ], height=(int)[ 16, 2147483647 ]</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term">name</span></p></td> |
| <td>src</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">direction</span></p></td> |
| <td>source</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">presence</span></p></td> |
| <td>always</td> |
| </tr> |
| <tr> |
| <td><p><span class="term">details</span></p></td> |
| <td>video/mj2</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <p> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.functions_details"></a><h2>Functions</h2> |
| <p></p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux-struct"></a><h3>GstMJ2Mux</h3> |
| <pre class="programlisting">typedef struct _GstMJ2Mux GstMJ2Mux;</pre> |
| <p> |
| </p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-good-plugins-mj2mux.property-details"></a><h2>Property Details</h2> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--dts-method"></a><h3>The <code class="literal">“dts-method”</code> property</h3> |
| <pre class="programlisting"> “dts-method” <span class="type">GstQTMuxDtsMethods</span></pre> |
| <p>Method to determine DTS time (DEPRECATED).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: reorder</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--faststart"></a><h3>The <code class="literal">“faststart”</code> property</h3> |
| <pre class="programlisting"> “faststart” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>If the file should be formatted for faststart (headers first).</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--faststart-file"></a><h3>The <code class="literal">“faststart-file”</code> property</h3> |
| <pre class="programlisting"> “faststart-file” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre> |
| <p>File that will be used temporarily to store data from the stream when creating a faststart file. If null a filepath will be created automatically.</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: NULL</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--fragment-duration"></a><h3>The <code class="literal">“fragment-duration”</code> property</h3> |
| <pre class="programlisting"> “fragment-duration” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> |
| <p>Fragment durations in ms (produce a fragmented file if > 0).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: 0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--moov-recovery-file"></a><h3>The <code class="literal">“moov-recovery-file”</code> property</h3> |
| <pre class="programlisting"> “moov-recovery-file” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre> |
| <p>File to be used to store data for moov atom making movie file recovery possible in case of a crash during muxing. Null for disabled. (Experimental).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: NULL</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--movie-timescale"></a><h3>The <code class="literal">“movie-timescale”</code> property</h3> |
| <pre class="programlisting"> “movie-timescale” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> |
| <p>Timescale to use in the movie (units per second).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Allowed values: >= 1</p> |
| <p>Default value: 1800</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--presentation-time"></a><h3>The <code class="literal">“presentation-time”</code> property</h3> |
| <pre class="programlisting"> “presentation-time” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Calculate and include presentation/composition time (in addition to decoding time).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: TRUE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--streamable"></a><h3>The <code class="literal">“streamable”</code> property</h3> |
| <pre class="programlisting"> “streamable” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>If set to true, the output should be as if it is to be streamed and hence no indexes written or duration written. (DEPRECATED, only valid for fragmented MP4).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMJ2Mux--trak-timescale"></a><h3>The <code class="literal">“trak-timescale”</code> property</h3> |
| <pre class="programlisting"> “trak-timescale” <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> |
| <p>Timescale to use for the tracks (units per second, 0 is automatic).</p> |
| <p>Flags: Read / Write / Construct</p> |
| <p>Default value: 0</p> |
| </div> |
| </div> |
| </div> |
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