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| <a href="#gst-plugins-bad-plugins-videoanalyse.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#gst-plugins-bad-plugins-videoanalyse.description" class="shortcut">Description</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> |
| </tr></table></div> |
| <div class="refsynopsisdiv"> |
| <a name="gst-plugins-bad-plugins-videoanalyse.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis">struct <a class="link" href="gst-plugins-bad-plugins-videoanalyse.html#GstVideoAnalyse" title="struct GstVideoAnalyse">GstVideoAnalyse</a>; |
| </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="idp21722016"></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="idp21725088"></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="idp21732544"></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"></a><h3>struct GstVideoAnalyse</h3> |
| <pre class="programlisting">struct GstVideoAnalyse { |
| GstVideoFilter videofilter; |
| |
| gint width, height; |
| |
| gboolean message; |
| |
| gdouble brightness; |
| gdouble brightness_var; |
| |
| guint64 interval; |
| }; |
| </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> |
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