<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>videoanalyse</title> <meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> <link rel="home" href="index.html" title="GStreamer Bad Plugins 0.10 Plugins Reference Manual"> <link rel="up" href="ch01.html" title="gst-plugins-bad Elements"> <link rel="prev" href="gst-plugins-bad-plugins-twirl.html" title="twirl"> <link rel="next" href="gst-plugins-bad-plugins-videodetect.html" title="videodetect"> <meta name="generator" content="GTK-Doc V1.18 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"> <tr valign="middle"> <td><a accesskey="p" href="gst-plugins-bad-plugins-twirl.html"><img src="left.png" width="24" 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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> </tr></table></div> <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 <wim@fluendo.com></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> </div> </div> </div> <div class="footer"> <hr> Generated by GTK-Doc V1.18</div> </body> </html>