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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>GStreamer Good Plugins 1.0 Plugins Reference Manual: gamma</title>
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                  <a href="#gst-plugins-good-plugins-gamma.properties" class="shortcut">Properties</a></span>
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<div class="refentry">
<a name="gst-plugins-good-plugins-gamma"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-good-plugins-gamma.top_of_page"></a>gamma</span></h2>
<p>gamma — Adjusts gamma on a video stream</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-gamma.properties"></a><h2>Properties</h2>
<div class="informaltable"><table 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#gdouble"><span class="type">gdouble</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-gamma.html#GstGamma--gamma" title="The “gamma” property">gamma</a></td>
<td class="property_flags">Read / Write</td>
</tr></tbody>
</table></div>
</div>
<a name="GstGamma"></a><div class="refsect1">
<a name="gst-plugins-good-plugins-gamma.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table 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-good-plugins-gamma.html#GstGamma-struct" title="struct GstGamma">GstGamma</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-gamma.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">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</a>
            <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html">GstElement</a>
                <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseTransform.html">GstBaseTransform</a>
                    <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-gstvideofilter.html#GstVideoFilter">GstVideoFilter</a>
                        <span class="lineart">╰──</span> GstGamma
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-gamma.description"></a><h2>Description</h2>
<p>Performs gamma correction on a video stream.</p>
<div class="refsect2">
<a name="id-1.2.59.7.3"></a><h3>Example launch line</h3>
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 videotestsrc ! gamma gamma=2.0 ! videoconvert ! ximagesink
</pre></div> This pipeline will make the image "brighter".
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 videotestsrc ! gamma gamma=0.5 ! videoconvert ! ximagesink
</pre></div> This pipeline will make the image "darker".
</div>
<p>Last reviewed on 2010-04-18 (0.10.22)</p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.59.7.4.1.1"></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-good-plugins-plugin-videofilter.html#plugin-videofilter">videofilter</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Arwed v. Merkatz &lt;v.merkatz@gmx.net</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Effect/Video</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.59.7.4.1.2"></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>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){ AYUV, ARGB, BGRA, ABGR, RGBA, Y444, xRGB, RGBx, xBGR, BGRx, RGB, BGR, Y42B, NV12, NV21, YUY2, UYVY, YVYU, I420, YV12, IYUV, Y41B }, 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){ AYUV, ARGB, BGRA, ABGR, RGBA, Y444, xRGB, RGBx, xBGR, BGRx, RGB, BGR, Y42B, NV12, NV21, YUY2, UYVY, YVYU, I420, YV12, IYUV, Y41B }, 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-good-plugins-gamma.functions_details"></a><h2>Functions</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-gamma.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstGamma-struct"></a><h3>struct GstGamma</h3>
<pre class="programlisting">struct GstGamma;</pre>
<p>Opaque data structure.</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-gamma.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstGamma--gamma"></a><h3>The <code class="literal">“gamma”</code> property</h3>
<pre class="programlisting">  “gamma”                    <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre>
<p>gamma.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [0.01,10]</p>
<p>Default value: 1</p>
</div>
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