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>cutter: 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-cpureport.html" title="cpureport"> 10<link rel="next" href="gst-plugins-good-plugins-dcaparse.html" title="dcaparse"> 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-cutter.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 19 <a href="#gst-plugins-good-plugins-cutter.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 20 <a href="#gst-plugins-good-plugins-cutter.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-cpureport.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-dcaparse.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-cutter"></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-cutter.top_of_page"></a>cutter</span></h2> 32<p>cutter</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-cutter.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> 45<tr> 46<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> 47<td class="property_name"><a class="link" href="gst-plugins-good-plugins-cutter.html#GstCutter--leaky" title="The “leaky” property">leaky</a></td> 48<td class="property_flags">Read / Write</td> 49</tr> 50<tr> 51<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a></td> 52<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> 53<td class="property_flags">Read / Write</td> 54</tr> 55<tr> 56<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a></td> 57<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> 58<td class="property_flags">Read / Write</td> 59</tr> 60<tr> 61<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></td> 62<td class="property_name"><a class="link" href="gst-plugins-good-plugins-cutter.html#GstCutter--threshold" title="The “threshold” property">threshold</a></td> 63<td class="property_flags">Read / Write</td> 64</tr> 65<tr> 66<td class="property_type"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></td> 67<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> 68<td class="property_flags">Read / Write</td> 69</tr> 70</tbody> 71</table></div> 72</div> 73<a name="GstCutter"></a><div class="refsect1"> 74<a name="gst-plugins-good-plugins-cutter.other"></a><h2>Types and Values</h2> 75<div class="informaltable"><table class="informaltable" width="100%" border="0"> 76<colgroup> 77<col width="150px" class="name"> 78<col class="description"> 79</colgroup> 80<tbody><tr> 81<td class="datatype_keyword">struct</td> 82<td class="function_name"><a class="link" href="gst-plugins-good-plugins-cutter.html#GstCutter-struct" title="struct GstCutter">GstCutter</a></td> 83</tr></tbody> 84</table></div> 85</div> 86<div class="refsect1"> 87<a name="gst-plugins-good-plugins-cutter.object-hierarchy"></a><h2>Object Hierarchy</h2> 88<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 89 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 90 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 91 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 92 <span class="lineart">╰──</span> GstCutter 93</pre> 94</div> 95<div class="refsect1"> 96<a name="gst-plugins-good-plugins-cutter.description"></a><h2>Description</h2> 97<p>Analyses the audio signal for periods of silence. The start and end of 98silence is signalled by bus messages named</p> 99<code class="classname">"cutter"</code>. 100<p>The message's structure contains two fields:</p> 101<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 102<li class="listitem"><p> 103 <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> 104 <code class="classname">"timestamp"</code>: 105 the timestamp of the buffer that triggered the message. 106 </p></li> 107<li class="listitem"><p> 108 gboolean 109 <code class="classname">"above"</code>: 110 <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. 111 </p></li> 112</ul></div> 113<div class="refsect2"> 114<a name="id-1.2.41.7.6"></a><h3>Example launch line</h3> 115<div class="informalexample"> 116 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 117 <tbody> 118 <tr> 119 <td class="listing_lines" align="right"><pre>1</pre></td> 120 <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> <span class="gtkdoc opt">-</span>m filesrc location<span class="gtkdoc opt">=</span>foo<span class="gtkdoc opt">.</span>ogg <span class="gtkdoc opt">!</span> decodebin <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> cutter <span class="gtkdoc opt">!</span> autoaudiosink</pre></td> 121 </tr> 122 </tbody> 123 </table> 124</div> 125 Show cut messages. 126</div> 127<div class="refsynopsisdiv"> 128<h2>Synopsis</h2> 129<div class="refsect2"> 130<a name="id-1.2.41.7.7.1"></a><h3>Element Information</h3> 131<div class="variablelist"><table border="0" class="variablelist"> 132<colgroup> 133<col align="left" valign="top"> 134<col> 135</colgroup> 136<tbody> 137<tr> 138<td><p><span class="term">plugin</span></p></td> 139<td> 140 <a class="link" href="gst-plugins-good-plugins-plugin-cutter.html#plugin-cutter">cutter</a> 141 </td> 142</tr> 143<tr> 144<td><p><span class="term">author</span></p></td> 145<td>Thomas Vander Stichele <thomas at apestaart dot org></td> 146</tr> 147<tr> 148<td><p><span class="term">class</span></p></td> 149<td>Filter/Editor/Audio</td> 150</tr> 151</tbody> 152</table></div> 153</div> 154<hr> 155<div class="refsect2"> 156<a name="id-1.2.41.7.7.2"></a><h3>Element Pads</h3> 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>sink</td> 166</tr> 167<tr> 168<td><p><span class="term">direction</span></p></td> 169<td>sink</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>audio/x-raw, format=(string){ S8, S16LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td> 178</tr> 179</tbody> 180</table></div> 181<div class="variablelist"><table border="0" class="variablelist"> 182<colgroup> 183<col align="left" valign="top"> 184<col> 185</colgroup> 186<tbody> 187<tr> 188<td><p><span class="term">name</span></p></td> 189<td>src</td> 190</tr> 191<tr> 192<td><p><span class="term">direction</span></p></td> 193<td>source</td> 194</tr> 195<tr> 196<td><p><span class="term">presence</span></p></td> 197<td>always</td> 198</tr> 199<tr> 200<td><p><span class="term">details</span></p></td> 201<td>audio/x-raw, format=(string){ S8, S16LE }, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ], layout=(string)interleaved</td> 202</tr> 203</tbody> 204</table></div> 205</div> 206</div> 207</div> 208<div class="refsect1"> 209<a name="gst-plugins-good-plugins-cutter.functions_details"></a><h2>Functions</h2> 210<p></p> 211</div> 212<div class="refsect1"> 213<a name="gst-plugins-good-plugins-cutter.other_details"></a><h2>Types and Values</h2> 214<div class="refsect2"> 215<a name="GstCutter-struct"></a><h3>struct GstCutter</h3> 216<pre class="programlisting">struct GstCutter;</pre> 217</div> 218</div> 219<div class="refsect1"> 220<a name="gst-plugins-good-plugins-cutter.property-details"></a><h2>Property Details</h2> 221<div class="refsect2"> 222<a name="GstCutter--leaky"></a><h3>The <code class="literal">“leaky”</code> property</h3> 223<pre class="programlisting"> “leaky” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 224<p>do we leak buffers when below threshold ?.</p> 225<p>Flags: Read / Write</p> 226<p>Default value: FALSE</p> 227</div> 228<hr> 229<div class="refsect2"> 230<a name="GstCutter--pre-length"></a><h3>The <code class="literal">“pre-length”</code> property</h3> 231<pre class="programlisting"> “pre-length” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a></pre> 232<p>Length of pre-recording buffer (in nanoseconds).</p> 233<p>Flags: Read / Write</p> 234<p>Default value: 0</p> 235</div> 236<hr> 237<div class="refsect2"> 238<a name="GstCutter--run-length"></a><h3>The <code class="literal">“run-length”</code> property</h3> 239<pre class="programlisting"> “run-length” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a></pre> 240<p>Length of drop below threshold before cut_stop (in nanoseconds).</p> 241<p>Flags: Read / Write</p> 242<p>Default value: 0</p> 243</div> 244<hr> 245<div class="refsect2"> 246<a name="GstCutter--threshold"></a><h3>The <code class="literal">“threshold”</code> property</h3> 247<pre class="programlisting"> “threshold” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a></pre> 248<p>Volume threshold before trigger.</p> 249<p>Flags: Read / Write</p> 250<p>Default value: 0</p> 251</div> 252<hr> 253<div class="refsect2"> 254<a name="GstCutter--threshold-dB"></a><h3>The <code class="literal">“threshold-dB”</code> property</h3> 255<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> 256<p>Volume threshold before trigger (in dB).</p> 257<p>Flags: Read / Write</p> 258<p>Default value: 0</p> 259</div> 260</div> 261</div> 262<div class="footer"> 263<hr>Generated by GTK-Doc V1.28</div> 264</body> 265</html>
