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<a href="#gst-plugins-good-plugins-videomixer.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
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<a name="gst-plugins-good-plugins-videomixer"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="gst-plugins-good-plugins-videomixer.top_of_page"></a>videomixer</span></h2>
<p>videomixer — Mix multiple video streams</p>
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<div class="refsect1">
<a name="gst-plugins-good-plugins-videomixer.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-videomixer.description"></a><h2>Description</h2>
<p>Videomixer2 can accept AYUV, ARGB and BGRA video streams. For each of the requested
sink pads it will compare the incoming geometry and framerate to define the
output parameters. Indeed output video frames will have the geometry of the
biggest incoming video stream and the framerate of the fastest incoming one.</p>
<p>Videomixer will do colorspace conversion.</p>
<p>Individual parameters for each input stream can be configured on the
<span class="type">GstVideoMixer2Pad</span>.</p>
<div class="refsect2">
<a name="id-1.2.155.4.5"></a><h3>Sample pipelines</h3>
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 \
videotestsrc pattern=1 ! \
video/x-raw,format=AYUV,framerate=\(fraction\)10/1,width=100,height=100 ! \
videobox border-alpha=0 top=-70 bottom=-70 right=-220 ! \
videomixer name=mix sink_0::alpha=0.7 sink_1::alpha=0.5 ! \
videoconvert ! xvimagesink \
videotestsrc ! \
video/x-raw,format=AYUV,framerate=\(fraction\)5/1,width=320,height=240 ! mix.
</pre></div> A pipeline to demonstrate videomixer used together with videobox.
This should show a 320x240 pixels video test source with some transparency
showing the background checker pattern. Another video test source with just
the snow pattern of 100x100 pixels is overlayed on top of the first one on
the left vertically centered with a small transparency showing the first
video test source behind and the checker pattern under it. Note that the
framerate of the output video is 10 frames per second.
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 videotestsrc pattern=1 ! \
video/x-raw, framerate=\(fraction\)10/1, width=100, height=100 ! \
videomixer name=mix ! videoconvert ! ximagesink \
videotestsrc ! \
video/x-raw, framerate=\(fraction\)5/1, width=320, height=240 ! mix.
</pre></div> A pipeline to demostrate bgra mixing. (This does not demonstrate alpha blending).
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 videotestsrc pattern=1 ! \
video/x-raw,format =I420, framerate=\(fraction\)10/1, width=100, height=100 ! \
videomixer name=mix ! videoconvert ! ximagesink \
videotestsrc ! \
video/x-raw,format=I420, framerate=\(fraction\)5/1, width=320, height=240 ! mix.
</pre></div> A pipeline to test I420
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 videomixer name=mixer sink_1::alpha=0.5 sink_1::xpos=50 sink_1::ypos=50 ! \
videoconvert ! ximagesink \
videotestsrc pattern=snow timestamp-offset=3000000000 ! \
"video/x-raw,format=AYUV,width=640,height=480,framerate=(fraction)30/1" ! \
timeoverlay ! queue2 ! mixer. \
videotestsrc pattern=smpte ! \
"video/x-raw,format=AYUV,width=800,height=600,framerate=(fraction)10/1" ! \
timeoverlay ! queue2 ! mixer.
</pre></div> A pipeline to demonstrate synchronized mixing (the second stream starts after 3 seconds)
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.155.4.6.1"></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-videomixer.html#plugin-videomixer">videomixer</a>
</td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Wim Taymans <wim@fluendo.com>, Sebastian Dröge <sebastian.droege@collabora.co.uk></td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Editor/Video</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.155.4.6.2"></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>sink_%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>video/x-raw, format=(string){ AYUV, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, RGBx, BGRx }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</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/x-raw, format=(string){ AYUV, BGRA, ARGB, RGBA, ABGR, Y444, Y42B, YUY2, UYVY, YVYU, I420, YV12, NV12, NV21, Y41B, RGB, BGR, xRGB, xBGR, RGBx, BGRx }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-videomixer.functions_details"></a><h2>Functions</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-videomixer.other_details"></a><h2>Types and Values</h2>
</div>
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