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<div class="refentry" title="mplex">
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<h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-mplex.top_of_page"></a>mplex</span></h2>
<p>mplex — High-quality MPEG/DVD/SVCD/VCD video/audio multiplexer</p>
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<div class="refsynopsisdiv" title="Synopsis">
<a name="gst-plugins-bad-plugins-mplex.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex" title="GstMplex">GstMplex</a>;
</pre>
</div>
<div class="refsect1" title="Properties">
<a name="gst-plugins-bad-plugins-mplex.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--bufsize" title='The "bufsize" property'>bufsize</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--format" title='The "format" property'>format</a>" <span class="type">GstMplexFormat</span> : Read / Write
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--mux-bitrate" title='The "mux-bitrate" property'>mux-bitrate</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--packets-per-pack" title='The "packets-per-pack" property'>packets-per-pack</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--sector-size" title='The "sector-size" property'>sector-size</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--system-headers" title='The "system-headers" property'>system-headers</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write
"<a class="link" href="gst-plugins-bad-plugins-mplex.html#GstMplex--vbr" title='The "vbr" property'>vbr</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write
</pre>
</div>
<div class="refsect1" title="Description">
<a name="gst-plugins-bad-plugins-mplex.description"></a><h2>Description</h2>
<p>
This element is an audio/video multiplexer for MPEG-1/2 video streams
and (un)compressed audio streams such as AC3, MPEG layer I/II/III.
It is based on the <a class="ulink" href="http://mjpeg.sourceforge.net/" target="_top">mjpegtools</a> library.
Documentation on creating MPEG videos in general can be found in the
<a class="ulink" href="https://sourceforge.net/docman/display_doc.php?docid=3456&group_id=5776" target="_top">MJPEG Howto</a>
and the man-page of the mplex tool documents the properties of this element,
which are shared with the mplex tool.
</p>
<p>
</p>
<div class="refsect2" title="Example pipeline">
<a name="id398850"></a><h3>Example pipeline</h3>
<div class="informalexample">
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<td class="listing_lines" align="right"><pre>1</pre></td>
<td class="listing_code"><pre class="programlisting">gst<span class="symbol">-</span>launch <span class="symbol">-</span>v videotestsrc num<span class="symbol">-</span>buffers<span class="symbol">=</span><span class="number">1000</span> <span class="symbol">!</span> mpeg2enc <span class="symbol">!</span> mplex <span class="symbol">!</span> filesink location<span class="symbol">=</span>videotestsrc<span class="symbol">.</span>mpg</pre></td>
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This example pipeline will encode a test video source to an
MPEG1 elementary stream and multiplexes this to an MPEG system stream.
<p>
If several streams are being multiplexed, there should (as usual) be
a queue in each stream, and due to mplex' buffering the capacities of these
may have to be set to a few times the default settings to prevent the
pipeline stalling.
</p>
</div>
</div>
<div class="refsect1" title="Details">
<a name="gst-plugins-bad-plugins-mplex.details"></a><h2>Details</h2>
<div class="refsect2" title="GstMplex">
<a name="GstMplex"></a><h3>GstMplex</h3>
<pre class="programlisting">typedef struct {
GstElement parent;
/* pads */
GSList *pads;
GstPad *srcpad;
guint num_apads, num_vpads;
/* options wrapper */
GstMplexJob *job;
/* lock for syncing */
GMutex *tlock;
/* with TLOCK */
/* muxer writer generated eos */
gboolean eos;
/* flowreturn obtained by muxer task */
GstFlowReturn srcresult;
} GstMplex;
</pre>
<p>
</p>
</div>
</div>
<div class="refsect1" title="Property Details">
<a name="gst-plugins-bad-plugins-mplex.property-details"></a><h2>Property Details</h2>
<div class="refsect2" title='The "bufsize" property'>
<a name="GstMplex--bufsize"></a><h3>The <code class="literal">"bufsize"</code> property</h3>
<pre class="programlisting"> "bufsize" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>Target decoders video buffer size (kB) [default determined by format if not explicitly set].</p>
<p>Allowed values: [20,4000]</p>
<p>Default value: 46</p>
</div>
<hr>
<div class="refsect2" title='The "format" property'>
<a name="GstMplex--format"></a><h3>The <code class="literal">"format"</code> property</h3>
<pre class="programlisting"> "format" <span class="type">GstMplexFormat</span> : Read / Write</pre>
<p>Encoding profile format.</p>
<p>Default value: Generic MPEG-1</p>
</div>
<hr>
<div class="refsect2" title='The "mux-bitrate" property'>
<a name="GstMplex--mux-bitrate"></a><h3>The <code class="literal">"mux-bitrate"</code> property</h3>
<pre class="programlisting"> "mux-bitrate" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>Bitrate of output stream in kbps (0 = autodetect).</p>
<p>Allowed values: [0,15360]</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2" title='The "packets-per-pack" property'>
<a name="GstMplex--packets-per-pack"></a><h3>The <code class="literal">"packets-per-pack"</code> property</h3>
<pre class="programlisting"> "packets-per-pack" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>Number of packets per pack for generic formats.</p>
<p>Allowed values: [1,100]</p>
<p>Default value: 1</p>
</div>
<hr>
<div class="refsect2" title='The "sector-size" property'>
<a name="GstMplex--sector-size"></a><h3>The <code class="literal">"sector-size"</code> property</h3>
<pre class="programlisting"> "sector-size" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>Specify sector size in bytes for generic formats.</p>
<p>Allowed values: [256,16384]</p>
<p>Default value: 2048</p>
</div>
<hr>
<div class="refsect2" title='The "system-headers" property'>
<a name="GstMplex--system-headers"></a><h3>The <code class="literal">"system-headers"</code> property</h3>
<pre class="programlisting"> "system-headers" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Create system header in every pack for generic formats.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2" title='The "vbr" property'>
<a name="GstMplex--vbr"></a><h3>The <code class="literal">"vbr"</code> property</h3>
<pre class="programlisting"> "vbr" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Whether the input video stream is variable bitrate.</p>
<p>Default value: FALSE</p>
</div>
</div>
<div class="refsect1" title="See Also">
<a name="gst-plugins-bad-plugins-mplex.see-also"></a><h2>See Also</h2>
mpeg2enc
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