1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>gamma: GStreamer Good Plugins 1.0 Plugins Reference Manual</title> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="index.html" title="GStreamer Good Plugins 1.0 Plugins Reference Manual"> 8<link rel="up" href="ch01.html" title="gst-plugins-good Elements"> 9<link rel="prev" href="gst-plugins-good-plugins-flxdec.html" title="flxdec"> 10<link rel="next" href="gst-plugins-good-plugins-gdkpixbufdec.html" title="gdkpixbufdec"> 11<meta name="generator" content="GTK-Doc V1.28 (XML mode)"> 12<link rel="stylesheet" href="style.css" type="text/css"> 13</head> 14<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 15<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> 16<td width="100%" align="left" class="shortcuts"> 17<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> 18 <a href="#gst-plugins-good-plugins-gamma.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 19 <a href="#gst-plugins-good-plugins-gamma.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 20 <a href="#gst-plugins-good-plugins-gamma.properties" class="shortcut">Properties</a></span> 21</td> 22<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> 23<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> 24<td><a accesskey="p" href="gst-plugins-good-plugins-flxdec.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> 25<td><a accesskey="n" href="gst-plugins-good-plugins-gdkpixbufdec.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> 26</tr></table> 27<div class="refentry"> 28<a name="gst-plugins-good-plugins-gamma"></a><div class="titlepage"></div> 29<div class="refnamediv"><table width="100%"><tr> 30<td valign="top"> 31<h2><span class="refentrytitle"><a name="gst-plugins-good-plugins-gamma.top_of_page"></a>gamma</span></h2> 32<p>gamma</p> 33</td> 34<td class="gallery_image" valign="top" align="right"></td> 35</tr></table></div> 36<div class="refsect1"> 37<a name="gst-plugins-good-plugins-gamma.properties"></a><h2>Properties</h2> 38<div class="informaltable"><table class="informaltable" border="0"> 39<colgroup> 40<col width="150px" class="properties_type"> 41<col width="300px" class="properties_name"> 42<col width="200px" class="properties_flags"> 43</colgroup> 44<tbody><tr> 45<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></td> 46<td class="property_name"><a class="link" href="gst-plugins-good-plugins-gamma.html#GstGamma--gamma" title="The “gamma” property">gamma</a></td> 47<td class="property_flags">Read / Write</td> 48</tr></tbody> 49</table></div> 50</div> 51<a name="GstGamma"></a><div class="refsect1"> 52<a name="gst-plugins-good-plugins-gamma.other"></a><h2>Types and Values</h2> 53<div class="informaltable"><table class="informaltable" width="100%" border="0"> 54<colgroup> 55<col width="150px" class="name"> 56<col class="description"> 57</colgroup> 58<tbody><tr> 59<td class="datatype_keyword">struct</td> 60<td class="function_name"><a class="link" href="gst-plugins-good-plugins-gamma.html#GstGamma-struct" title="struct GstGamma">GstGamma</a></td> 61</tr></tbody> 62</table></div> 63</div> 64<div class="refsect1"> 65<a name="gst-plugins-good-plugins-gamma.object-hierarchy"></a><h2>Object Hierarchy</h2> 66<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 67 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 68 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 69 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 70 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseTransform.html#GstBaseTransform-struct">GstBaseTransform</a> 71 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/GstVideoFilter.html#GstVideoFilter-struct">GstVideoFilter</a> 72 <span class="lineart">╰──</span> GstGamma 73</pre> 74</div> 75<div class="refsect1"> 76<a name="gst-plugins-good-plugins-gamma.description"></a><h2>Description</h2> 77<p>Performs gamma correction on a video stream.</p> 78<div class="refsect2"> 79<a name="id-1.2.64.7.3"></a><h3>Example launch line</h3> 80<div class="informalexample"> 81 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 82 <tbody> 83 <tr> 84 <td class="listing_lines" align="right"><pre>1</pre></td> 85 <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> videotestsrc <span class="gtkdoc opt">!</span> gamma gamma<span class="gtkdoc opt">=</span><span class="number">2.0</span> <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> ximagesink</pre></td> 86 </tr> 87 </tbody> 88 </table> 89</div> 90 This pipeline will make the image "brighter". 91<div class="informalexample"> 92 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 93 <tbody> 94 <tr> 95 <td class="listing_lines" align="right"><pre>1</pre></td> 96 <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> videotestsrc <span class="gtkdoc opt">!</span> gamma gamma<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> ximagesink</pre></td> 97 </tr> 98 </tbody> 99 </table> 100</div> 101 This pipeline will make the image "darker". 102</div> 103<div class="refsynopsisdiv"> 104<h2>Synopsis</h2> 105<div class="refsect2"> 106<a name="id-1.2.64.7.4.1"></a><h3>Element Information</h3> 107<div class="variablelist"><table border="0" class="variablelist"> 108<colgroup> 109<col align="left" valign="top"> 110<col> 111</colgroup> 112<tbody> 113<tr> 114<td><p><span class="term">plugin</span></p></td> 115<td> 116 <a class="link" href="gst-plugins-good-plugins-plugin-videofilter.html#plugin-videofilter">videofilter</a> 117 </td> 118</tr> 119<tr> 120<td><p><span class="term">author</span></p></td> 121<td>Arwed v. Merkatz <v.merkatz@gmx.net</td> 122</tr> 123<tr> 124<td><p><span class="term">class</span></p></td> 125<td>Filter/Effect/Video</td> 126</tr> 127</tbody> 128</table></div> 129</div> 130<hr> 131<div class="refsect2"> 132<a name="id-1.2.64.7.4.2"></a><h3>Element Pads</h3> 133<div class="variablelist"><table border="0" class="variablelist"> 134<colgroup> 135<col align="left" valign="top"> 136<col> 137</colgroup> 138<tbody> 139<tr> 140<td><p><span class="term">name</span></p></td> 141<td>sink</td> 142</tr> 143<tr> 144<td><p><span class="term">direction</span></p></td> 145<td>sink</td> 146</tr> 147<tr> 148<td><p><span class="term">presence</span></p></td> 149<td>always</td> 150</tr> 151<tr> 152<td><p><span class="term">details</span></p></td> 153<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> 154</tr> 155</tbody> 156</table></div> 157<div class="variablelist"><table border="0" class="variablelist"> 158<colgroup> 159<col align="left" valign="top"> 160<col> 161</colgroup> 162<tbody> 163<tr> 164<td><p><span class="term">name</span></p></td> 165<td>src</td> 166</tr> 167<tr> 168<td><p><span class="term">direction</span></p></td> 169<td>source</td> 170</tr> 171<tr> 172<td><p><span class="term">presence</span></p></td> 173<td>always</td> 174</tr> 175<tr> 176<td><p><span class="term">details</span></p></td> 177<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> 178</tr> 179</tbody> 180</table></div> 181</div> 182</div> 183</div> 184<div class="refsect1"> 185<a name="gst-plugins-good-plugins-gamma.functions_details"></a><h2>Functions</h2> 186<p></p> 187</div> 188<div class="refsect1"> 189<a name="gst-plugins-good-plugins-gamma.other_details"></a><h2>Types and Values</h2> 190<div class="refsect2"> 191<a name="GstGamma-struct"></a><h3>struct GstGamma</h3> 192<pre class="programlisting">struct GstGamma;</pre> 193<p>Opaque data structure.</p> 194</div> 195</div> 196<div class="refsect1"> 197<a name="gst-plugins-good-plugins-gamma.property-details"></a><h2>Property Details</h2> 198<div class="refsect2"> 199<a name="GstGamma--gamma"></a><h3>The <code class="literal">“gamma”</code> property</h3> 200<pre class="programlisting"> “gamma” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre> 201<p>gamma.</p> 202<p>Flags: Read / Write</p> 203<p>Allowed values: [0.01,10]</p> 204<p>Default value: 1</p> 205</div> 206</div> 207</div> 208<div class="footer"> 209<hr>Generated by GTK-Doc V1.28</div> 210</body> 211</html>
