gstreamer1.0-plugins-good-doc 1.2.4-1~ubuntu1.4 / usr / share / gtk-doc / html / gst-plugins-good-plugins-1.0 / gst-plugins-good-plugins-cutter.html

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GStreamer Good Plugins 1.0 Plugins Reference Manual: cutter</title>
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                  <a href="#gst-plugins-good-plugins-cutter.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 
                  <a href="#gst-plugins-good-plugins-cutter.properties" class="shortcut">Properties</a></span>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="gst-plugins-good-plugins-cutter"></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-cutter.top_of_page"></a>cutter</span></h2>
<p>cutter — Audio Cutter to split audio into non-silent bits</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.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-good-plugins-cutter.html#GstCutter--leaky" title="The “leaky” property">leaky</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">guint64</span></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-cutter.html#GstCutter--pre-length" title="The “pre-length” property">pre-length</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">guint64</span></td>
<td class="property_name"><a class="link" href="gst-plugins-good-plugins-cutter.html#GstCutter--run-length" title="The “run-length” property">run-length</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-good-plugins-cutter.html#GstCutter--threshold" title="The “threshold” property">threshold</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-good-plugins-cutter.html#GstCutter--threshold-dB" title="The “threshold-dB” property">threshold-dB</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<a name="GstCutter"></a><div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.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-cutter.html#GstCutter-struct" title="struct GstCutter">GstCutter</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.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> GstCutter
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.description"></a><h2>Description</h2>
<p>Analyses the audio signal for periods of silence. The start and end of
silence is signalled by bus messages named</p>
<code class="classname">"cutter"</code>.
<p>The message's structure contains two fields:</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><p>
  <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
  <code class="classname">"timestamp"</code>:
  the timestamp of the buffer that triggered the message.
  </p></li>
<li class="listitem"><p>
  gboolean
  <code class="classname">"above"</code>:
  <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for begin of silence and <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> for end of silence.
  </p></li>
</ul></div>
<div class="refsect2">
<a name="id-1.2.38.7.6"></a><h3>Example launch line</h3>
<div class="informalexample"><pre class="programlisting">
gst-launch-1.0 -m filesrc location=foo.ogg ! decodebin ! audioconvert ! cutter ! autoaudiosink
</pre></div> Show cut messages.
</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.38.7.7.1"></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-cutter.html#plugin-cutter">cutter</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Thomas Vander Stichele &lt;thomas at apestaart dot org&gt;</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Editor/Audio</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.38.7.7.2"></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, format=(string){ S8LE, S16LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</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, format=(string){ S8LE, S16LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.functions_details"></a><h2>Functions</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstCutter-struct"></a><h3>struct GstCutter</h3>
<pre class="programlisting">struct GstCutter;</pre>
<p>
</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-cutter.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstCutter--leaky"></a><h3>The <code class="literal">“leaky”</code> property</h3>
<pre class="programlisting">  “leaky”                    <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>do we leak buffers when below threshold ?.</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstCutter--pre-length"></a><h3>The <code class="literal">“pre-length”</code> property</h3>
<pre class="programlisting">  “pre-length”               <span class="type">guint64</span></pre>
<p>Length of pre-recording buffer (in nanoseconds).</p>
<p>Flags: Read / Write</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstCutter--run-length"></a><h3>The <code class="literal">“run-length”</code> property</h3>
<pre class="programlisting">  “run-length”               <span class="type">guint64</span></pre>
<p>Length of drop below threshold before cut_stop (in nanoseconds).</p>
<p>Flags: Read / Write</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstCutter--threshold"></a><h3>The <code class="literal">“threshold”</code> property</h3>
<pre class="programlisting">  “threshold”                <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre>
<p>Volume threshold before trigger.</p>
<p>Flags: Read / Write</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstCutter--threshold-dB"></a><h3>The <code class="literal">“threshold-dB”</code> property</h3>
<pre class="programlisting">  “threshold-dB”             <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre>
<p>Volume threshold before trigger (in dB).</p>
<p>Flags: Read / Write</p>
<p>Default value: 0</p>
</div>
</div>
</div>
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