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<a href="#gst-plugins-base-plugins-volume.synopsis" class="shortcut">Top</a>
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<a href="#gst-plugins-base-plugins-volume.description" class="shortcut">Description</a>
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<a href="#gst-plugins-base-plugins-volume.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<a href="#gst-plugins-base-plugins-volume.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
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<a href="#gst-plugins-base-plugins-volume.properties" class="shortcut">Properties</a>
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<div class="refentry">
<a name="gst-plugins-base-plugins-volume"></a><div class="titlepage"></div>
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<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>
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<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="gst-plugins-base-plugins-volume.synopsis"></a><h2>Synopsis</h2>
<a name="GstVolume"></a><pre class="synopsis">struct <a class="link" href="gst-plugins-base-plugins-volume.html#GstVolume-struct" title="struct GstVolume">GstVolume</a>;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html">GstObject</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html">GstElement</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseTransform.html">GstBaseTransform</a>
+----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gstaudiofilter.html#GstAudioFilter">GstAudioFilter</a>
+----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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-base-libs/html/gst-plugins-base-libs-gststreamvolume.html#GstStreamVolume">GstStreamVolume</a>.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="gst-plugins-base-plugins-volume.html#GstVolume--mute" title='The "mute" property'>mute</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write
"<a class="link" href="gst-plugins-base-plugins-volume.html#GstVolume--volume" title='The "volume" property'>volume</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> : Read / Write
</pre>
</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>
<p>
</p>
<div class="refsect2">
<a name="id-1.2.40.7.3.1"></a><h3>Example launch line</h3>
<div class="informalexample">
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<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>v <span class="gtkdoc opt">-</span>m audiotestsrc <span class="gtkdoc opt">!</span> volume volume<span class="gtkdoc opt">=</span><span class="number">0.5</span> <span class="gtkdoc opt">!</span> level <span class="gtkdoc opt">!</span> fakesink silent<span class="gtkdoc opt">=</span>TRUE</pre></td>
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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.
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<p>
</p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.40.7.4.1"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0" class="variablelist">
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<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-1.2.40.7.4.2"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
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<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, format=(string){ F32LE, F64LE, S8, S16LE, S24LE, S32LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td>
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<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
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<td><p><span class="term">name</span></p></td>
<td>src</td>
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<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, format=(string){ F32LE, F64LE, S8, S16LE, S24LE, S32LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td>
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</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-plugins-volume.details"></a><h2>Details</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> : Read / Write</pre>
<p>mute channel.</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> : Read / Write</pre>
<p>volume factor, 1.0=100%.</p>
<p>Allowed values: [0,10]</p>
<p>Default value: 1</p>
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