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<a href="#gst-plugins-bad-plugins-videoanalyse.synopsis" class="shortcut">Top</a>
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                  <a href="#gst-plugins-bad-plugins-videoanalyse.description" class="shortcut">Description</a>
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                  <a href="#gst-plugins-bad-plugins-videoanalyse.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#gst-plugins-bad-plugins-videoanalyse.properties" class="shortcut">Properties</a>
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<div class="refentry">
<a name="gst-plugins-bad-plugins-videoanalyse"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-videoanalyse.top_of_page"></a>videoanalyse</span></h2>
<p>videoanalyse — Analyse video signal</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="gst-plugins-bad-plugins-videoanalyse.synopsis"></a><h2>Synopsis</h2>
<a name="GstVideoAnalyse"></a><pre class="synopsis">struct              <a class="link" href="gst-plugins-bad-plugins-videoanalyse.html#GstVideoAnalyse-struct" title="struct GstVideoAnalyse">GstVideoAnalyse</a>;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-videoanalyse.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a>
         +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html">GstElement</a>
               +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseTransform.html">GstBaseTransform</a>
                     +----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gstvideofilter.html#GstVideoFilter">GstVideoFilter</a>
                           +----GstVideoAnalyse
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-videoanalyse.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="gst-plugins-bad-plugins-videoanalyse.html#GstVideoAnalyse--message" title='The "message" property'>message</a>"                  <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write / Construct
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-videoanalyse.description"></a><h2>Description</h2>
<p>
This plugin analyses every video frame and if the <a class="link" href="gst-plugins-bad-plugins-videoanalyse.html#GstVideoAnalyse--message" title='The "message" property'><span class="type">"message"</span></a>
property is <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a>, posts an element message with video statistics called
<code class="classname">"GstVideoAnalyse"</code>.
</p>
<p>
The message's structure contains these fields:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
  <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
  <code class="classname">"timestamp"</code>:
  the timestamp of the buffer that triggered the message.
  </p></li>
<li class="listitem"><p>
  <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
  <code class="classname">"stream-time"</code>:
  the stream time of the buffer.
  </p></li>
<li class="listitem"><p>
  <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
  <code class="classname">"running-time"</code>:
  the running_time of the buffer.
  </p></li>
<li class="listitem"><p>
  <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
  <code class="classname">"duration"</code>:
  the duration of the buffer.
  </p></li>
<li class="listitem"><p>
  <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>
  <code class="classname">"brightness"</code>:
  the average brightness of the frame.
  </p></li>
<li class="listitem"><p>
  <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a>
  <code class="classname">"brightness-variance"</code>:
  the brightness variance of the frame.
  </p></li>
</ul></div>
<p>
</p>
<p>
</p>
<div class="refsect2">
<a name="idp23453680"></a><h3>Example launch line</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>m videotestsrc <span class="gtkdoc opt">!</span> videoanalyse <span class="gtkdoc opt">!</span> ffmpegcolorspace <span class="gtkdoc opt">!</span> ximagesink</pre></td>
      </tr>
    </tbody>
  </table>
</div>
 This pipeline emits messages to the console for each frame that has been analysed. 
</div>
<p>
</p>
<p>
Last reviewed on 2007-05-30 (0.10.5)
</p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="idp23456336"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">plugin</span></p></td>
<td>
            <a class="link" href="gst-plugins-bad-plugins-plugin-videosignal.html#plugin-videosignal">videosignal</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Wim Taymans &lt;wim@fluendo.com&gt;</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Analyzer/Video</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="idp23462720"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>sink</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>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>video/x-raw-yuv, format=(fourcc){ I420, YV12 }, 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">
<col align="left" valign="top">
<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-yuv, format=(fourcc){ I420, YV12 }, 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-bad-plugins-videoanalyse.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstVideoAnalyse-struct"></a><h3>struct GstVideoAnalyse</h3>
<pre class="programlisting">struct GstVideoAnalyse;</pre>
<p>
Opaque datastructure.
</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-videoanalyse.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstVideoAnalyse--message"></a><h3>The <code class="literal">"message"</code> property</h3>
<pre class="programlisting">  "message"                  <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write / Construct</pre>
<p>Post statics messages.</p>
<p>Default value: TRUE</p>
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