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 | <td valign="top"> | 
 | <h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-compositor.top_of_page"></a>compositor</span></h2> | 
 | <p>compositor</p> | 
 | </td> | 
 | <td class="gallery_image" valign="top" align="right"></td> | 
 | </tr></table></div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.properties"></a><h2>Properties</h2> | 
 | <div class="informaltable"><table class="informaltable" 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"><a class="link" href="gst-plugins-bad-plugins-compositor.html#GstCompositorBackground" title="enum GstCompositorBackground"><span class="type">GstCompositorBackground</span></a></td> | 
 | <td class="property_name"><a class="link" href="gst-plugins-bad-plugins-compositor.html#GstCompositor--background" title="The “background” property">background</a></td> | 
 | <td class="property_flags">Read / Write</td> | 
 | </tr></tbody> | 
 | </table></div> | 
 | </div> | 
 | <a name="GstCompositor"></a><div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.other"></a><h2>Types and Values</h2> | 
 | <div class="informaltable"><table class="informaltable" width="100%" border="0"> | 
 | <colgroup> | 
 | <col width="150px" class="name"> | 
 | <col class="description"> | 
 | </colgroup> | 
 | <tbody> | 
 | <tr> | 
 | <td class="datatype_keyword">struct</td> | 
 | <td class="function_name"><a class="link" href="gst-plugins-bad-plugins-compositor.html#GstCompositor-struct" title="struct GstCompositor">GstCompositor</a></td> | 
 | </tr> | 
 | <tr> | 
 | <td class="datatype_keyword">enum</td> | 
 | <td class="function_name"><a class="link" href="gst-plugins-bad-plugins-compositor.html#GstCompositorBackground" title="enum GstCompositorBackground">GstCompositorBackground</a></td> | 
 | </tr> | 
 | </tbody> | 
 | </table></div> | 
 | </div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.object-hierarchy"></a><h2>Object Hierarchy</h2> | 
 | <pre class="screen">    <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GObject-struct">GObject</a> | 
 |     <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobjectgobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> | 
 |         <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstObject.html#GstObject-struct">GstObject</a> | 
 |             <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstElement.html#GstElement-struct">GstElement</a> | 
 |                 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-bad-libs-1.0gst-plugins-bad-libs-GstAggregator.html#GstAggregator">GstAggregator</a> | 
 |                     <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-bad-libs-1.0gst-plugins-bad-libs-GstVideoAggregator.html#GstVideoAggregator">GstVideoAggregator</a> | 
 |                         <span class="lineart">╰──</span> GstCompositor | 
 | </pre> | 
 | </div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.implemented-interfaces"></a><h2>Implemented Interfaces</h2> | 
 | <p> | 
 | GstCompositor implements | 
 |  <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstChildProxy.html#GstChildProxy-struct">GstChildProxy</a>.</p> | 
 | </div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.description"></a><h2>Description</h2> | 
 | <p>Compositor 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>Compositor will do colorspace conversion.</p> | 
 | <p>Individual parameters for each input stream can be configured on the | 
 | <span class="type">GstCompositorPad</span>:</p> | 
 | <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> | 
 | <li class="listitem"> | 
 | "xpos": The x-coordinate position of the top-left corner of the picture | 
 | (<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a>) | 
 | </li> | 
 | <li class="listitem"> | 
 | "ypos": The y-coordinate position of the top-left corner of the picture | 
 | (<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a>) | 
 | </li> | 
 | <li class="listitem"> | 
 | "width": The width of the picture; the input will be scaled if necessary | 
 | (<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a>) | 
 | </li> | 
 | <li class="listitem"> | 
 | "height": The height of the picture; the input will be scaled if necessary | 
 | (<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gint"><span class="type">gint</span></a>) | 
 | </li> | 
 | <li class="listitem"> | 
 | "alpha": The transparency of the picture; between 0.0 and 1.0. The blending | 
 | is a simple copy when fully-transparent (0.0) and fully-opaque (1.0). | 
 | (<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>) | 
 | </li> | 
 | <li class="listitem"> | 
 | "zorder": The z-order position of the picture in the composition | 
 | (<a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#guint"><span class="type">guint</span></a>) | 
 | </li> | 
 | </ul></div> | 
 | <div class="refsect2"> | 
 | <a name="id-1.2.17.8.6"></a><h3>Sample 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 | 
 | 2 | 
 | 3 | 
 | 4 | 
 | 5 | 
 | 6 | 
 | 7 | 
 | 8</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> \ | 
 |   videotestsrc pattern<span class="gtkdoc opt">=</span><span class="number">1</span> <span class="gtkdoc opt">!</span> \ | 
 |   video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>format<span class="gtkdoc opt">=</span>AYUV<span class="gtkdoc opt">,</span>framerate<span class="gtkdoc opt">=</span>\<span class="gtkdoc opt">(</span>fraction\<span class="gtkdoc opt">)</span><span class="number">10</span><span class="gtkdoc opt">/</span><span class="number">1</span><span class="gtkdoc opt">,</span>width<span class="gtkdoc opt">=</span><span class="number">100</span><span class="gtkdoc opt">,</span>height<span class="gtkdoc opt">=</span><span class="number">100</span> <span class="gtkdoc opt">!</span> \ | 
 |   videobox border<span class="gtkdoc opt">-</span>alpha<span class="gtkdoc opt">=</span><span class="number">0</span> top<span class="gtkdoc opt">=-</span><span class="number">70</span> bottom<span class="gtkdoc opt">=-</span><span class="number">70</span> right<span class="gtkdoc opt">=-</span><span class="number">220</span> <span class="gtkdoc opt">!</span> \ | 
 |   compositor name<span class="gtkdoc opt">=</span>comp sink_0<span class="gtkdoc opt">::</span>alpha<span class="gtkdoc opt">=</span><span class="number">0.7</span> sink_1<span class="gtkdoc opt">::</span>alpha<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc opt">!</span> \ | 
 |   videoconvert <span class="gtkdoc opt">!</span> xvimagesink \ | 
 |   videotestsrc <span class="gtkdoc opt">!</span> \ | 
 |   video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>format<span class="gtkdoc opt">=</span>AYUV<span class="gtkdoc opt">,</span>framerate<span class="gtkdoc opt">=</span>\<span class="gtkdoc opt">(</span>fraction\<span class="gtkdoc opt">)</span><span class="number">5</span><span class="gtkdoc opt">/</span><span class="number">1</span><span class="gtkdoc opt">,</span>width<span class="gtkdoc opt">=</span><span class="number">320</span><span class="gtkdoc opt">,</span>height<span class="gtkdoc opt">=</span><span class="number">240</span> <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span></pre></td> | 
 |       </tr> | 
 |     </tbody> | 
 |   </table> | 
 | </div> | 
 |  A pipeline to demonstrate compositor 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 overlaid 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"> | 
 |   <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> | 
 |     <tbody> | 
 |       <tr> | 
 |         <td class="listing_lines" align="right"><pre>1 | 
 | 2 | 
 | 3 | 
 | 4 | 
 | 5</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> videotestsrc pattern<span class="gtkdoc opt">=</span><span class="number">1</span> <span class="gtkdoc opt">!</span> \ | 
 |   video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span> framerate<span class="gtkdoc opt">=</span>\<span class="gtkdoc opt">(</span>fraction\<span class="gtkdoc opt">)</span><span class="number">10</span><span class="gtkdoc opt">/</span><span class="number">1</span><span class="gtkdoc opt">,</span> width<span class="gtkdoc opt">=</span><span class="number">100</span><span class="gtkdoc opt">,</span> height<span class="gtkdoc opt">=</span><span class="number">100</span> <span class="gtkdoc opt">!</span> \ | 
 |   compositor name<span class="gtkdoc opt">=</span>comp <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> ximagesink \ | 
 |   videotestsrc <span class="gtkdoc opt">!</span>  \ | 
 |   video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span> framerate<span class="gtkdoc opt">=</span>\<span class="gtkdoc opt">(</span>fraction\<span class="gtkdoc opt">)</span><span class="number">5</span><span class="gtkdoc opt">/</span><span class="number">1</span><span class="gtkdoc opt">,</span> width<span class="gtkdoc opt">=</span><span class="number">320</span><span class="gtkdoc opt">,</span> height<span class="gtkdoc opt">=</span><span class="number">240</span> <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span></pre></td> | 
 |       </tr> | 
 |     </tbody> | 
 |   </table> | 
 | </div> | 
 |  A pipeline to demostrate bgra comping. (This does not demonstrate alpha blending).  | 
 | <div class="informalexample"> | 
 |   <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> | 
 |     <tbody> | 
 |       <tr> | 
 |         <td class="listing_lines" align="right"><pre>1 | 
 | 2 | 
 | 3 | 
 | 4 | 
 | 5</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> videotestsrc pattern<span class="gtkdoc opt">=</span><span class="number">1</span> <span class="gtkdoc opt">!</span> \ | 
 |   video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>format <span class="gtkdoc opt">=</span>I420<span class="gtkdoc opt">,</span> framerate<span class="gtkdoc opt">=</span>\<span class="gtkdoc opt">(</span>fraction\<span class="gtkdoc opt">)</span><span class="number">10</span><span class="gtkdoc opt">/</span><span class="number">1</span><span class="gtkdoc opt">,</span> width<span class="gtkdoc opt">=</span><span class="number">100</span><span class="gtkdoc opt">,</span> height<span class="gtkdoc opt">=</span><span class="number">100</span> <span class="gtkdoc opt">!</span> \ | 
 |   compositor name<span class="gtkdoc opt">=</span>comp <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> ximagesink \ | 
 |   videotestsrc <span class="gtkdoc opt">!</span> \ | 
 |   video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>format<span class="gtkdoc opt">=</span>I420<span class="gtkdoc opt">,</span> framerate<span class="gtkdoc opt">=</span>\<span class="gtkdoc opt">(</span>fraction\<span class="gtkdoc opt">)</span><span class="number">5</span><span class="gtkdoc opt">/</span><span class="number">1</span><span class="gtkdoc opt">,</span> width<span class="gtkdoc opt">=</span><span class="number">320</span><span class="gtkdoc opt">,</span> height<span class="gtkdoc opt">=</span><span class="number">240</span> <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span></pre></td> | 
 |       </tr> | 
 |     </tbody> | 
 |   </table> | 
 | </div> | 
 |  A pipeline to test I420 | 
 | <div class="informalexample"> | 
 |   <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> | 
 |     <tbody> | 
 |       <tr> | 
 |         <td class="listing_lines" align="right"><pre>1 | 
 | 2 | 
 | 3 | 
 | 4 | 
 | 5 | 
 | 6 | 
 | 7 | 
 | 8</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> compositor name<span class="gtkdoc opt">=</span>comp sink_1<span class="gtkdoc opt">::</span>alpha<span class="gtkdoc opt">=</span><span class="number">0.5</span> sink_1<span class="gtkdoc opt">::</span>xpos<span class="gtkdoc opt">=</span><span class="number">50</span> sink_1<span class="gtkdoc opt">::</span>ypos<span class="gtkdoc opt">=</span><span class="number">50</span> <span class="gtkdoc opt">!</span> \ | 
 |   videoconvert <span class="gtkdoc opt">!</span> ximagesink \ | 
 |   videotestsrc pattern<span class="gtkdoc opt">=</span>snow timestamp<span class="gtkdoc opt">-</span>offset<span class="gtkdoc opt">=</span><span class="number">3000000000</span> <span class="gtkdoc opt">!</span> \ | 
 |   <span class="string">"video/x-raw,format=AYUV,width=640,height=480,framerate=(fraction)30/1"</span> <span class="gtkdoc opt">!</span> \ | 
 |   timeoverlay <span class="gtkdoc opt">!</span> queue2 <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span> \ | 
 |   videotestsrc pattern<span class="gtkdoc opt">=</span>smpte <span class="gtkdoc opt">!</span> \ | 
 |   <span class="string">"video/x-raw,format=AYUV,width=800,height=600,framerate=(fraction)10/1"</span> <span class="gtkdoc opt">!</span> \ | 
 |   timeoverlay <span class="gtkdoc opt">!</span> queue2 <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span></pre></td> | 
 |       </tr> | 
 |     </tbody> | 
 |   </table> | 
 | </div> | 
 |  A pipeline to demonstrate synchronized compositing (the second stream starts after 3 seconds) | 
 | </div> | 
 | <div class="refsynopsisdiv"> | 
 | <h2>Synopsis</h2> | 
 | <div class="refsect2"> | 
 | <a name="id-1.2.17.8.7.1"></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> | 
 |             compositor | 
 |           </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/Compositor</td> | 
 | </tr> | 
 | </tbody> | 
 | </table></div> | 
 | </div> | 
 | <hr> | 
 | <div class="refsect2"> | 
 | <a name="id-1.2.17.8.7.2"></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> | 
 | </div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.functions_details"></a><h2>Functions</h2> | 
 | <p></p> | 
 | </div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.other_details"></a><h2>Types and Values</h2> | 
 | <div class="refsect2"> | 
 | <a name="GstCompositor-struct"></a><h3>struct GstCompositor</h3> | 
 | <pre class="programlisting">struct GstCompositor;</pre> | 
 | <p>The opaque <a class="link" href="gst-plugins-bad-plugins-compositor.html#GstCompositor"><span class="type">GstCompositor</span></a> structure.</p> | 
 | </div> | 
 | <hr> | 
 | <div class="refsect2"> | 
 | <a name="GstCompositorBackground"></a><h3>enum GstCompositorBackground</h3> | 
 | <div class="refsect3"> | 
 | <a name="GstCompositorBackground.members"></a><h4>Members</h4> | 
 | <div class="informaltable"><table class="informaltable" width="100%" border="0"> | 
 | <colgroup> | 
 | <col width="300px" class="enum_members_name"> | 
 | <col class="enum_members_description"> | 
 | <col width="200px" class="enum_members_annotations"> | 
 | </colgroup> | 
 | <tbody> | 
 | <tr> | 
 | <td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-CHECKER:CAPS"></a>COMPOSITOR_BACKGROUND_CHECKER</p></td> | 
 | <td> </td> | 
 | <td> </td> | 
 | </tr> | 
 | <tr> | 
 | <td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-BLACK:CAPS"></a>COMPOSITOR_BACKGROUND_BLACK</p></td> | 
 | <td> </td> | 
 | <td> </td> | 
 | </tr> | 
 | <tr> | 
 | <td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-WHITE:CAPS"></a>COMPOSITOR_BACKGROUND_WHITE</p></td> | 
 | <td> </td> | 
 | <td> </td> | 
 | </tr> | 
 | <tr> | 
 | <td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-TRANSPARENT:CAPS"></a>COMPOSITOR_BACKGROUND_TRANSPARENT</p></td> | 
 | <td> </td> | 
 | <td> </td> | 
 | </tr> | 
 | </tbody> | 
 | </table></div> | 
 | </div> | 
 | </div> | 
 | </div> | 
 | <div class="refsect1"> | 
 | <a name="gst-plugins-bad-plugins-compositor.property-details"></a><h2>Property Details</h2> | 
 | <div class="refsect2"> | 
 | <a name="GstCompositor--background"></a><h3>The <code class="literal">“background”</code> property</h3> | 
 | <pre class="programlisting">  “background”               <a class="link" href="gst-plugins-bad-plugins-compositor.html#GstCompositorBackground" title="enum GstCompositorBackground"><span class="type">GstCompositorBackground</span></a></pre> | 
 | <p>Background type.</p> | 
 | <p>Flags: Read / Write</p> | 
 | <p>Default value: Checker pattern</p> | 
 | </div> | 
 | </div> | 
 | </div> | 
 | <div class="footer"> | 
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