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<a name="gst-plugins-base-plugins-volume"></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-volume.top_of_page"></a>volume</span></h2>
<p>volume — Set volume on audio/raw streams</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.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#gboolean"><span class="type">gboolean</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-base-plugins-volume.html#GstVolume--mute" title="The “mute” property">mute</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<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-base-plugins-volume.html#GstVolume--volume" title="The “volume” property">volume</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<a name="GstVolume"></a><div class="refsect1">
<a name="gst-plugins-base-plugins-volume.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-base-plugins-volume.html#GstVolume-struct" title="struct GstVolume">GstVolume</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.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/gstreamer-0.10/GstObject.html">GstObject</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html">GstElement</a>
<span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-0.10/GstBaseTransform.html">GstBaseTransform</a>
<span class="lineart">╰──</span> <a href="../gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstaudiofilter.html#GstAudioFilter">GstAudioFilter</a>
<span class="lineart">╰──</span> GstVolume
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GstVolume implements
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstImplementsInterface.html">GstImplementsInterface</a>, <a href="../gst-plugins-base-libs-0.10/gst-plugins-base-libs-gstmixer.html#GstMixer">GstMixer</a> and <a href="../gst-plugins-base-libs-0.10/gst-plugins-base-libs-gststreamvolume.html#GstStreamVolume">GstStreamVolume</a>.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.description"></a><h2>Description</h2>
<p>The volume element changes the volume of the audio data.</p>
<div class="refsect2">
<a name="id-1.2.46.8.3"></a><h3>Example launch line</h3>
<div class="informalexample"><pre class="programlisting">
gst-launch -v -m audiotestsrc ! volume volume=0.5 ! level ! fakesink silent=TRUE
</pre></div> This pipeline shows that the level of audiotestsrc has been halved
(peak values are around -6 dB and RMS around -9 dB) compared to
the same pipeline without the volume element.
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.46.8.4.1"></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-volume.html#plugin-volume">volume</a>
</td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Andy Wingo <wingo@pobox.com></td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Effect/Audio</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.46.8.4.2"></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>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>audio/x-raw-float, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int){ 32, 64 }</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)8, depth=(int)8, signed=(boolean)true</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)16, depth=(int)16, signed=(boolean)true</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)24, depth=(int)24, signed=(boolean)true</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)32, depth=(int)32, signed=(boolean)true</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>audio/x-raw-float, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int){ 32, 64 }</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)8, depth=(int)8, signed=(boolean)true</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)16, depth=(int)16, signed=(boolean)true</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)24, depth=(int)24, signed=(boolean)true</td>
</tr>
<tr>
<td><p><span class="term"></span></p></td>
<td> audio/x-raw-int, channels=(int)[ 1, 2147483647 ], rate=(int)[ 1, 2147483647 ], endianness=(int)1234, width=(int)32, depth=(int)32, signed=(boolean)true</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.functions_details"></a><h2>Functions</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstVolume-struct"></a><h3>struct GstVolume</h3>
<pre class="programlisting">struct GstVolume;</pre>
<p>Opaque data structure.</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstVolume--mute"></a><h3>The <code class="literal">“mute”</code> property</h3>
<pre class="programlisting"> “mute” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>mute channel.</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstVolume--volume"></a><h3>The <code class="literal">“volume”</code> property</h3>
<pre class="programlisting"> “volume” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre>
<p>volume factor, 1.0=100%.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [0,10]</p>
<p>Default value: 1</p>
</div>
</div>
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