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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>clockoverlay: GStreamer Base Plugins 1.0 Plugins Reference Manual</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
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                  <a href="#gst-plugins-base-plugins-clockoverlay.properties" class="shortcut">Properties</a></span>
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<div class="refentry">
<a name="gst-plugins-base-plugins-clockoverlay"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-plugins-clockoverlay.top_of_page"></a>clockoverlay</span></h2>
<p>clockoverlay</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.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 href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td>
<td class="property_name"><a class="link" href="gst-plugins-base-plugins-clockoverlay.html#GstClockOverlay--time-format" title="The “time-format” property">time-format</a></td>
<td class="property_flags">Read / Write</td>
</tr></tbody>
</table></div>
</div>
<a name="GstClockOverlay"></a><div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.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-base-plugins-clockoverlay.html#GstClockOverlay-struct" title="struct GstClockOverlay">GstClockOverlay</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
    <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
        <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a>
            <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a>
                <span class="lineart">╰──</span> GstBaseTextOverlay
                    <span class="lineart">╰──</span> GstClockOverlay
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.description"></a><h2>Description</h2>
<p>This element overlays the current clock time on top of a video
stream. You can position the text and configure the font details
using the properties of the <span class="type">GstBaseTextOverlay</span> class. By default, the
time is displayed in the top left corner of the picture, with some
padding to the left and to the top.</p>
<div class="refsect2">
<a name="id-1.2.13.7.3"></a><h3>Example launch lines</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><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v videotestsrc <span class="gtkdoc opt">!</span> clockoverlay <span class="gtkdoc opt">!</span> autovideosink</pre></td>
      </tr>
    </tbody>
  </table>
</div>
 Display the current wall clock time in the top left corner of the video picture
<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><span class="number">1.0</span> <span class="gtkdoc opt">-</span>v videotestsrc <span class="gtkdoc opt">!</span> clockoverlay halignment<span class="gtkdoc opt">=</span>right valignment<span class="gtkdoc opt">=</span>bottom text<span class="gtkdoc opt">=</span><span class="string">&quot;Edge City&quot;</span> shaded<span class="gtkdoc opt">-</span>background<span class="gtkdoc opt">=</span><span class="keyword">true</span> font<span class="gtkdoc opt">-</span>desc<span class="gtkdoc opt">=</span><span class="string">&quot;Sans, 36&quot;</span> <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> autovideosink</pre></td>
      </tr>
    </tbody>
  </table>
</div>
 Another pipeline that displays the current time with some leading
text in the bottom right corner of the video picture, with the background
of the text being shaded in order to make it more legible on top of a
bright video background.
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.13.7.4.1"></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>
            <a class="link" href="gst-plugins-base-plugins-plugin-pango.html#plugin-pango">pango</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Tim-Philipp Müller &lt;tim@centricular.net&gt;</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Editor/Video</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.13.7.4.2"></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>video_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, format=(string){ BGRx, RGBx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR, I420, YV12, AYUV, YUY2, UYVY, v308, Y41B, Y42B, Y444, NV12, NV21, A420, YUV9, YVU9, IYU1, GRAY8 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> video/x-raw(ANY), format=(string){ I420, YV12, YUY2, UYVY, AYUV, RGBx, BGRx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR, Y41B, Y42B, YVYU, Y444, v210, v216, NV12, NV21, NV16, NV61, NV24, GRAY8, GRAY16_BE, GRAY16_LE, v308, IYU2, RGB16, BGR16, RGB15, BGR15, UYVP, A420, RGB8P, YUV9, YVU9, IYU1, ARGB64, AYUV64, r210, I420_10LE, I420_10BE, I422_10LE, I422_10BE, Y444_10LE, Y444_10BE, GBR, GBR_10LE, GBR_10BE, NV12_64Z32, A420_10LE, A420_10BE, A422_10LE, A422_10BE, A444_10LE, A444_10BE, P010_10LE, P010_10BE }, 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){ BGRx, RGBx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR, I420, YV12, AYUV, YUY2, UYVY, v308, Y41B, Y42B, Y444, NV12, NV21, A420, YUV9, YVU9, IYU1, GRAY8 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> video/x-raw(ANY), format=(string){ I420, YV12, YUY2, UYVY, AYUV, RGBx, BGRx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR, Y41B, Y42B, YVYU, Y444, v210, v216, NV12, NV21, NV16, NV61, NV24, GRAY8, GRAY16_BE, GRAY16_LE, v308, IYU2, RGB16, BGR16, RGB15, BGR15, UYVP, A420, RGB8P, YUV9, YVU9, IYU1, ARGB64, AYUV64, r210, I420_10LE, I420_10BE, I422_10LE, I422_10BE, Y444_10LE, Y444_10BE, GBR, GBR_10LE, GBR_10BE, NV12_64Z32, A420_10LE, A420_10BE, A422_10LE, A422_10BE, A444_10LE, A444_10BE, P010_10LE, P010_10BE }, 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-base-plugins-clockoverlay.functions_details"></a><h2>Functions</h2>
<p></p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstClockOverlay-struct"></a><h3>struct GstClockOverlay</h3>
<pre class="programlisting">struct GstClockOverlay;</pre>
<p>Opaque clockoverlay data structure.</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstClockOverlay--time-format"></a><h3>The <code class="literal">“time-format”</code> property</h3>
<pre class="programlisting">  “time-format”              <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre>
<p>Format to use for time and date value, as in strftime.</p>
<p>Flags: Read / Write</p>
<p>Default value: "%H:%M:%S"</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-clockoverlay.see-also"></a><h2>See Also</h2>
<p><span class="type">GstBaseTextOverlay</span>, <a class="link" href="gst-plugins-base-plugins-timeoverlay.html#GstTimeOverlay"><span class="type">GstTimeOverlay</span></a></p>
</div>
</div>
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