1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>compositor: GStreamer Base Plugins 1.0 Plugins Reference Manual</title> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Plugins Reference Manual"> 8<link rel="up" href="ch01.html" title="gst-plugins-base Elements"> 9<link rel="prev" href="gst-plugins-base-plugins-clockoverlay.html" title="clockoverlay"> 10<link rel="next" href="gst-plugins-base-plugins-decodebin.html" title="decodebin"> 11<meta name="generator" content="GTK-Doc V1.28 (XML mode)"> 12<link rel="stylesheet" href="style.css" type="text/css"> 13</head> 14<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 15<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> 16<td width="100%" align="left" class="shortcuts"> 17<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> 18 <a href="#gst-plugins-base-plugins-compositor.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 19 <a href="#gst-plugins-base-plugins-compositor.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_interfaces"> <span class="dim">|</span> 20 <a href="#gst-plugins-base-plugins-compositor.implemented-interfaces" class="shortcut">Implemented Interfaces</a></span><span id="nav_properties"> <span class="dim">|</span> 21 <a href="#gst-plugins-base-plugins-compositor.properties" class="shortcut">Properties</a></span> 22</td> 23<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> 24<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> 25<td><a accesskey="p" href="gst-plugins-base-plugins-clockoverlay.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> 26<td><a accesskey="n" href="gst-plugins-base-plugins-decodebin.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> 27</tr></table> 28<div class="refentry"> 29<a name="gst-plugins-base-plugins-compositor"></a><div class="titlepage"></div> 30<div class="refnamediv"><table width="100%"><tr> 31<td valign="top"> 32<h2><span class="refentrytitle"><a name="gst-plugins-base-plugins-compositor.top_of_page"></a>compositor</span></h2> 33<p>compositor</p> 34</td> 35<td class="gallery_image" valign="top" align="right"></td> 36</tr></table></div> 37<div class="refsect1"> 38<a name="gst-plugins-base-plugins-compositor.properties"></a><h2>Properties</h2> 39<div class="informaltable"><table class="informaltable" border="0"> 40<colgroup> 41<col width="150px" class="properties_type"> 42<col width="300px" class="properties_name"> 43<col width="200px" class="properties_flags"> 44</colgroup> 45<tbody><tr> 46<td class="property_type"><a class="link" href="gst-plugins-base-plugins-compositor.html#GstCompositorBackground" title="enum GstCompositorBackground"><span class="type">GstCompositorBackground</span></a></td> 47<td class="property_name"><a class="link" href="gst-plugins-base-plugins-compositor.html#GstCompositor--background" title="The “background” property">background</a></td> 48<td class="property_flags">Read / Write</td> 49</tr></tbody> 50</table></div> 51</div> 52<a name="GstCompositor"></a><div class="refsect1"> 53<a name="gst-plugins-base-plugins-compositor.other"></a><h2>Types and Values</h2> 54<div class="informaltable"><table class="informaltable" width="100%" border="0"> 55<colgroup> 56<col width="150px" class="name"> 57<col class="description"> 58</colgroup> 59<tbody> 60<tr> 61<td class="datatype_keyword">struct</td> 62<td class="function_name"><a class="link" href="gst-plugins-base-plugins-compositor.html#GstCompositor-struct" title="struct GstCompositor">GstCompositor</a></td> 63</tr> 64<tr> 65<td class="datatype_keyword">enum</td> 66<td class="function_name"><a class="link" href="gst-plugins-base-plugins-compositor.html#GstCompositorBackground" title="enum GstCompositorBackground">GstCompositorBackground</a></td> 67</tr> 68</tbody> 69</table></div> 70</div> 71<div class="refsect1"> 72<a name="gst-plugins-base-plugins-compositor.object-hierarchy"></a><h2>Object Hierarchy</h2> 73<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 74 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 75 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 76 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 77 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstAggregator.html#GstAggregator-struct">GstAggregator</a> 78 <span class="lineart">╰──</span> <a href="../html/GstVideoAggregator.html#GstVideoAggregator-struct">GstVideoAggregator</a> 79 <span class="lineart">╰──</span> GstCompositor 80</pre> 81</div> 82<div class="refsect1"> 83<a name="gst-plugins-base-plugins-compositor.implemented-interfaces"></a><h2>Implemented Interfaces</h2> 84<p> 85GstCompositor implements 86 <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstChildProxy.html#GstChildProxy-struct">GstChildProxy</a>.</p> 87</div> 88<div class="refsect1"> 89<a name="gst-plugins-base-plugins-compositor.description"></a><h2>Description</h2> 90<p>Compositor can accept AYUV, ARGB and BGRA video streams. For each of the requested 91sink pads it will compare the incoming geometry and framerate to define the 92output parameters. Indeed output video frames will have the geometry of the 93biggest incoming video stream and the framerate of the fastest incoming one.</p> 94<p>Compositor will do colorspace conversion.</p> 95<p>Individual parameters for each input stream can be configured on the 96<span class="type">GstCompositorPad</span>:</p> 97<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 98<li class="listitem"><p>"xpos": The x-coordinate position of the top-left corner of the picture (<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>)</p></li> 99<li class="listitem"><p>"ypos": The y-coordinate position of the top-left corner of the picture (<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>)</p></li> 100<li class="listitem"><p>"width": The width of the picture; the input will be scaled if necessary (<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>)</p></li> 101<li class="listitem"><p>"height": The height of the picture; the input will be scaled if necessary (<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a>)</p></li> 102<li class="listitem"><p>"alpha": The transparency of the picture; between 0.0 and 1.0. The blending 103is a simple copy when fully-transparent (0.0) and fully-opaque (1.0). (<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>)</p></li> 104<li class="listitem"><p>"zorder": The z-order position of the picture in the composition (<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a>)</p></li> 105</ul></div> 106<div class="refsect3"> 107<a name="id-1.2.16.8.6"></a><h4>Sample pipelines</h4> 108<div class="informalexample"> 109 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 110 <tbody> 111 <tr> 112 <td class="listing_lines" align="right"><pre>1 1132 1143 1154 1165 1176 1187 1198</pre></td> 120 <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> \ 121 videotestsrc pattern<span class="gtkdoc opt">=</span><span class="number">1</span> <span class="gtkdoc opt">!</span> \ 122 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> \ 123 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> \ 124 compositor name<span class="gtkdoc opt">=</span>comp <span class="gtkdoc kwc">sink_0</span><span class="gtkdoc opt">::</span>alpha<span class="gtkdoc opt">=</span><span class="number">0.7</span> <span class="gtkdoc kwc">sink_1</span><span class="gtkdoc opt">::</span>alpha<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc opt">!</span> \ 125 videoconvert <span class="gtkdoc opt">!</span> xvimagesink \ 126 videotestsrc <span class="gtkdoc opt">!</span> \ 127 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> 128 </tr> 129 </tbody> 130 </table> 131</div> 132 133<p> A pipeline to demonstrate compositor used together with videobox. 134This should show a 320x240 pixels video test source with some transparency 135showing the background checker pattern. Another video test source with just 136the snow pattern of 100x100 pixels is overlaid on top of the first one on 137the left vertically centered with a small transparency showing the first 138video test source behind and the checker pattern under it. Note that the 139framerate of the output video is 10 frames per second.</p> 140<div class="informalexample"> 141 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 142 <tbody> 143 <tr> 144 <td class="listing_lines" align="right"><pre>1 1452 1463 1474 1485</pre></td> 149 <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> \ 150 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> \ 151 compositor name<span class="gtkdoc opt">=</span>comp <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> ximagesink \ 152 videotestsrc <span class="gtkdoc opt">!</span> \ 153 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> 154 </tr> 155 </tbody> 156 </table> 157</div> 158 159<p> A pipeline to demostrate bgra comping. (This does not demonstrate alpha blending).</p> 160<div class="informalexample"> 161 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 162 <tbody> 163 <tr> 164 <td class="listing_lines" align="right"><pre>1 1652 1663 1674 1685</pre></td> 169 <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> \ 170 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> \ 171 compositor name<span class="gtkdoc opt">=</span>comp <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> ximagesink \ 172 videotestsrc <span class="gtkdoc opt">!</span> \ 173 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> 174 </tr> 175 </tbody> 176 </table> 177</div> 178 179<p> A pipeline to test I420</p> 180<div class="informalexample"> 181 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 182 <tbody> 183 <tr> 184 <td class="listing_lines" align="right"><pre>1 1852 1863 1874 1885 1896 1907 1918</pre></td> 192 <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 <span class="gtkdoc kwc">sink_1</span><span class="gtkdoc opt">::</span>alpha<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc kwc">sink_1</span><span class="gtkdoc opt">::</span>xpos<span class="gtkdoc opt">=</span><span class="number">50</span> <span class="gtkdoc kwc">sink_1</span><span class="gtkdoc opt">::</span>ypos<span class="gtkdoc opt">=</span><span class="number">50</span> <span class="gtkdoc opt">!</span> \ 193 videoconvert <span class="gtkdoc opt">!</span> ximagesink \ 194 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> \ 195 <span class="string">"video/x-raw,format=AYUV,width=640,height=480,framerate=(fraction)30/1"</span> <span class="gtkdoc opt">!</span> \ 196 timeoverlay <span class="gtkdoc opt">!</span> queue2 <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span> \ 197 videotestsrc pattern<span class="gtkdoc opt">=</span>smpte <span class="gtkdoc opt">!</span> \ 198 <span class="string">"video/x-raw,format=AYUV,width=800,height=600,framerate=(fraction)10/1"</span> <span class="gtkdoc opt">!</span> \ 199 timeoverlay <span class="gtkdoc opt">!</span> queue2 <span class="gtkdoc opt">!</span> comp<span class="gtkdoc opt">.</span></pre></td> 200 </tr> 201 </tbody> 202 </table> 203</div> 204 205<p> A pipeline to demonstrate synchronized compositing (the second stream starts after 3 seconds)</p> 206</div> 207<div class="refsynopsisdiv"> 208<h2>Synopsis</h2> 209<div class="refsect2"> 210<a name="id-1.2.16.8.7.1"></a><h3>Element Information</h3> 211<div class="variablelist"><table border="0" class="variablelist"> 212<colgroup> 213<col align="left" valign="top"> 214<col> 215</colgroup> 216<tbody> 217<tr> 218<td><p><span class="term">plugin</span></p></td> 219<td> 220 <a class="link" href="gst-plugins-base-plugins-plugin-compositor.html#plugin-compositor">compositor</a> 221 </td> 222</tr> 223<tr> 224<td><p><span class="term">author</span></p></td> 225<td>Wim Taymans <wim@fluendo.com>, Sebastian Dröge <sebastian.droege@collabora.co.uk></td> 226</tr> 227<tr> 228<td><p><span class="term">class</span></p></td> 229<td>Filter/Editor/Video/Compositor</td> 230</tr> 231</tbody> 232</table></div> 233</div> 234<hr> 235<div class="refsect2"> 236<a name="id-1.2.16.8.7.2"></a><h3>Element Pads</h3> 237<div class="variablelist"><table border="0" class="variablelist"> 238<colgroup> 239<col align="left" valign="top"> 240<col> 241</colgroup> 242<tbody> 243<tr> 244<td><p><span class="term">name</span></p></td> 245<td>sink_%u</td> 246</tr> 247<tr> 248<td><p><span class="term">direction</span></p></td> 249<td>sink</td> 250</tr> 251<tr> 252<td><p><span class="term">presence</span></p></td> 253<td>request</td> 254</tr> 255<tr> 256<td><p><span class="term">details</span></p></td> 257<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> 258</tr> 259</tbody> 260</table></div> 261<div class="variablelist"><table border="0" class="variablelist"> 262<colgroup> 263<col align="left" valign="top"> 264<col> 265</colgroup> 266<tbody> 267<tr> 268<td><p><span class="term">name</span></p></td> 269<td>src</td> 270</tr> 271<tr> 272<td><p><span class="term">direction</span></p></td> 273<td>source</td> 274</tr> 275<tr> 276<td><p><span class="term">presence</span></p></td> 277<td>always</td> 278</tr> 279<tr> 280<td><p><span class="term">details</span></p></td> 281<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> 282</tr> 283</tbody> 284</table></div> 285</div> 286</div> 287</div> 288<div class="refsect1"> 289<a name="gst-plugins-base-plugins-compositor.functions_details"></a><h2>Functions</h2> 290<p></p> 291</div> 292<div class="refsect1"> 293<a name="gst-plugins-base-plugins-compositor.other_details"></a><h2>Types and Values</h2> 294<div class="refsect2"> 295<a name="GstCompositor-struct"></a><h3>struct GstCompositor</h3> 296<pre class="programlisting">struct GstCompositor;</pre> 297<p>The opaque <a class="link" href="gst-plugins-base-plugins-compositor.html#GstCompositor"><span class="type">GstCompositor</span></a> structure.</p> 298</div> 299<hr> 300<div class="refsect2"> 301<a name="GstCompositorBackground"></a><h3>enum GstCompositorBackground</h3> 302<p>The different backgrounds compositor can blend over.</p> 303<div class="refsect3"> 304<a name="GstCompositorBackground.members"></a><h4>Members</h4> 305<div class="informaltable"><table class="informaltable" width="100%" border="0"> 306<colgroup> 307<col width="300px" class="enum_members_name"> 308<col class="enum_members_description"> 309<col width="200px" class="enum_members_annotations"> 310</colgroup> 311<tbody> 312<tr> 313<td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-CHECKER:CAPS"></a>COMPOSITOR_BACKGROUND_CHECKER</p></td> 314<td class="enum_member_description"> 315<p>checker pattern background</p> 316</td> 317<td class="enum_member_annotations"> </td> 318</tr> 319<tr> 320<td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-BLACK:CAPS"></a>COMPOSITOR_BACKGROUND_BLACK</p></td> 321<td class="enum_member_description"> 322<p>solid color black background</p> 323</td> 324<td class="enum_member_annotations"> </td> 325</tr> 326<tr> 327<td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-WHITE:CAPS"></a>COMPOSITOR_BACKGROUND_WHITE</p></td> 328<td class="enum_member_description"> 329<p>solid color white background</p> 330</td> 331<td class="enum_member_annotations"> </td> 332</tr> 333<tr> 334<td class="enum_member_name"><p><a name="COMPOSITOR-BACKGROUND-TRANSPARENT:CAPS"></a>COMPOSITOR_BACKGROUND_TRANSPARENT</p></td> 335<td class="enum_member_description"> 336<p>background is left transparent and layers are composited using "A OVER B" composition rules. This is only applicable to AYUV and ARGB (and variants) as it preserves the alpha channel and allows for further mixing.</p> 337</td> 338<td class="enum_member_annotations"> </td> 339</tr> 340</tbody> 341</table></div> 342</div> 343</div> 344</div> 345<div class="refsect1"> 346<a name="gst-plugins-base-plugins-compositor.property-details"></a><h2>Property Details</h2> 347<div class="refsect2"> 348<a name="GstCompositor--background"></a><h3>The <code class="literal">“background”</code> property</h3> 349<pre class="programlisting"> “background” <a class="link" href="gst-plugins-base-plugins-compositor.html#GstCompositorBackground" title="enum GstCompositorBackground"><span class="type">GstCompositorBackground</span></a></pre> 350<p>Background type.</p> 351<p>Flags: Read / Write</p> 352<p>Default value: Checker pattern</p> 353</div> 354</div> 355</div> 356<div class="footer"> 357<hr>Generated by GTK-Doc V1.28</div> 358</body> 359</html>
