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<title>GStreamer Editing Services 1.2.1 Reference Manual: GESTrack</title>
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<a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span>
<a href="#GESTrack.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span>
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</tr></table>
<div class="refentry">
<a name="GESTrack"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GESTrack.top_of_page"></a>GESTrack</span></h2>
<p>GESTrack — Composition of objects</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GESTrack.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html"><span class="returnvalue">GstElement</span></a> *
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="GESTrack.html#GESCreateElementForGapFunc" title="GESCreateElementForGapFunc ()">*GESCreateElementForGapFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GESTrack.html" title="GESTrack"><span class="returnvalue">GESTrack</span></a> *
</td>
<td class="function_name">
<a class="link" href="GESTrack.html#ges-track-new" title="ges_track_new ()">ges_track_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GESTrack.html#ges-track-add-element" title="ges_track_add_element ()">ges_track_add_element</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GESTrack.html#ges-track-remove-element" title="ges_track_remove_element ()">ges_track_remove_element</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="returnvalue">GstCaps</span></a> *
</td>
<td class="function_name">
<a class="link" href="GESTrack.html#ges-track-get-caps" title="ges_track_get_caps ()">ges_track_get_caps</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> *
</td>
<td class="function_name">
<a class="link" href="GESTrack.html#ges-track-get-elements" title="ges_track_get_elements ()">ges_track_get_elements</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GESTrack.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/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *</td>
<td class="property_name"><a class="link" href="GESTrack.html#GESTrack--caps" title="The “caps” property">caps</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type"><span class="type">guint64</span></td>
<td class="property_name"><a class="link" href="GESTrack.html#GESTrack--duration" title="The “duration” property">duration</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *</td>
<td class="property_name"><a class="link" href="GESTrack.html#GESTrack--restriction-caps" title="The “restriction-caps” property">restriction-caps</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="ges-GES-Enums.html#GESTrackType" title="enum GESTrackType"><span class="type">GESTrackType</span></a></td>
<td class="property_name"><a class="link" href="GESTrack.html#GESTrack--track-type" title="The “track-type” property">track-type</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GESTrack.signals"></a><h2>Signals</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GESTrack.html#GESTrack-track-element-added" title="The “track-element-added” signal">track-element-added</a></td>
<td class="signal_flags">Run First</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GESTrack.html#GESTrack-track-element-removed" title="The “track-element-removed” signal">track-element-removed</a></td>
<td class="signal_flags">Run First</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GESTrack.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"> </td>
<td class="function_name"><a class="link" href="GESTrack.html#GESTrack-struct" title="GESTrack">GESTrack</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GESTrack.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> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBin.html">GstBin</a>
<span class="lineart">╰──</span> GESTrack
</pre>
</div>
<div class="refsect1">
<a name="GESTrack.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GESTrack implements
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstChildProxy.html">GstChildProxy</a> and <a class="link" href="GESMetaContainer.html" title="GESMetaContainer">GESMetaContainer</a>.</p>
</div>
<div class="refsect1">
<a name="GESTrack.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <ges/ges.h>
</pre>
</div>
<div class="refsect1">
<a name="GESTrack.description"></a><h2>Description</h2>
<p>Corresponds to one output format (i.e. audio OR video).</p>
<p>Contains the compatible TrackElement(s).</p>
<p>Wraps GNonLin's 'gnlcomposition' element.</p>
</div>
<div class="refsect1">
<a name="GESTrack.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GESCreateElementForGapFunc"></a><h3>GESCreateElementForGapFunc ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html"><span class="returnvalue">GstElement</span></a> *
<span class="c_punctuation">(</span>*GESCreateElementForGapFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *track</code></em>);</pre>
<p>A function that will be called to create the <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html"><span class="type">GstElement</span></a> that will be used
as a source to fill the gaps in <em class="parameter"><code>track</code></em>
.</p>
<div class="refsect3">
<a name="id-1.3.11.11.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>track</p></td>
<td class="parameter_description"><p>the <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.11.11.2.6"></a><h4>Returns</h4>
<p> A <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html"><span class="type">GstElement</span></a> (must be a source) that will be used to
fill the gaps (periods of time in <em class="parameter"><code>track</code></em>
that containes no source).</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="ges-track-new"></a><h3>ges_track_new ()</h3>
<pre class="programlisting"><a class="link" href="GESTrack.html" title="GESTrack"><span class="returnvalue">GESTrack</span></a> *
ges_track_new (<em class="parameter"><code><a class="link" href="ges-GES-Enums.html#GESTrackType" title="enum GESTrackType"><span class="type">GESTrackType</span></a> type</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *caps</code></em>);</pre>
<p>Creates a new <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> with the given <em class="parameter"><code>type</code></em>
and <em class="parameter"><code>caps</code></em>
.</p>
<p>The newly created track will steal a reference to the caps. If you wish to
use those caps elsewhere, you will have to take an extra reference.</p>
<div class="refsect3">
<a name="id-1.3.11.11.3.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>The type of track</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>caps</p></td>
<td class="parameter_description"><p> The caps to restrict the output of the track to. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.11.11.3.7"></a><h4>Returns</h4>
<p> A new <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a>.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="ges-track-add-element"></a><h3>ges_track_add_element ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
ges_track_add_element (<em class="parameter"><code><a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *track</code></em>,
<em class="parameter"><code><a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> *object</code></em>);</pre>
<p>Adds the given object to the track. Sets the object's controlling track,
and thus takes ownership of the <em class="parameter"><code>object</code></em>
.</p>
<p>An object can only be added to one track.</p>
<div class="refsect3">
<a name="id-1.3.11.11.4.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>track</p></td>
<td class="parameter_description"><p>a <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p> the <a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> to add. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.11.11.4.7"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if the object was properly added. <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a> if the track does not
want to accept the object.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="ges-track-remove-element"></a><h3>ges_track_remove_element ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
ges_track_remove_element (<em class="parameter"><code><a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *track</code></em>,
<em class="parameter"><code><a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> *object</code></em>);</pre>
<p>Removes the object from the track and unparents it.
Unparenting it means the reference owned by <em class="parameter"><code>track</code></em>
on the <em class="parameter"><code>object</code></em>
will be
removed. If you wish to use the <em class="parameter"><code>object</code></em>
after this function, make sure you
call <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#gst-object-ref"><code class="function">gst_object_ref()</code></a> before removing it from the <em class="parameter"><code>track</code></em>
.</p>
<div class="refsect3">
<a name="id-1.3.11.11.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>track</p></td>
<td class="parameter_description"><p>a <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>the <a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> to remove</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.11.11.5.6"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if the object was removed, else <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a> if the track
could not remove the object (like if it didn't belong to the track).</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="ges-track-get-caps"></a><h3>ges_track_get_caps ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="returnvalue">GstCaps</span></a> *
ges_track_get_caps (<em class="parameter"><code><a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *track</code></em>);</pre>
<p>Get the <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> this track is configured to output.</p>
<div class="refsect3">
<a name="id-1.3.11.11.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>track</p></td>
<td class="parameter_description"><p>a <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.11.11.6.6"></a><h4>Returns</h4>
<p> The <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> this track is configured to output.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="ges-track-get-elements"></a><h3>ges_track_get_elements ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> *
ges_track_get_elements (<em class="parameter"><code><a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *track</code></em>);</pre>
<p>Gets the <a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> contained in <em class="parameter"><code>track</code></em>
</p>
<div class="refsect3">
<a name="id-1.3.11.11.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>track</p></td>
<td class="parameter_description"><p>a <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.11.11.7.6"></a><h4>Returns</h4>
<p> the list of
<a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> present in the Track sorted by priority and start. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> GESTrackElement]</span></p>
</div>
</div>
</div>
<div class="refsect1">
<a name="GESTrack.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GESTrack-struct"></a><h3>GESTrack</h3>
<pre class="programlisting">typedef struct {
/* READ-ONLY */
GESTrackType type;
} GESTrack;
</pre>
<div class="refsect3">
<a name="id-1.3.11.12.2.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody><tr>
<td class="struct_member_name"><p><a class="link" href="ges-GES-Enums.html#GESTrackType" title="enum GESTrackType"><span class="type">GESTrackType</span></a> <em class="structfield"><code><a name="GESTrack-struct.type"></a>type</code></em>;</p></td>
<td class="struct_member_description"><p>a <a class="link" href="ges-GES-Enums.html#GESTrackType" title="enum GESTrackType"><span class="type">GESTrackType</span></a> indicting the basic type of the track.</p></td>
<td class="struct_member_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GESTrack.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GESTrack--caps"></a><h3>The <code class="literal">“caps”</code> property</h3>
<pre class="programlisting"> “caps” <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *</pre>
<p>Caps used to filter/choose the output stream. This is generally set to
a generic set of caps like 'video/x-raw' for raw video.</p>
<p>Default value: <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GST-CAPS-ANY:CAPS"><span class="type">GST_CAPS_ANY</span></a>.</p>
<p>Flags: Read / Write / Construct Only</p>
</div>
<hr>
<div class="refsect2">
<a name="GESTrack--duration"></a><h3>The <code class="literal">“duration”</code> property</h3>
<pre class="programlisting"> “duration” <span class="type">guint64</span></pre>
<p>Current duration of the track</p>
<p>Default value: O</p>
<p>Flags: Read</p>
<p>Default value: 1000000000</p>
</div>
<hr>
<div class="refsect2">
<a name="GESTrack--restriction-caps"></a><h3>The <code class="literal">“restriction-caps”</code> property</h3>
<pre class="programlisting"> “restriction-caps” <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> *</pre>
<p>Caps used to filter/choose the output stream.</p>
<p>Default value: <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstCaps.html#GST-CAPS-ANY:CAPS"><span class="type">GST_CAPS_ANY</span></a>.</p>
<p>Flags: Read / Write</p>
</div>
<hr>
<div class="refsect2">
<a name="GESTrack--track-type"></a><h3>The <code class="literal">“track-type”</code> property</h3>
<pre class="programlisting"> “track-type” <a class="link" href="ges-GES-Enums.html#GESTrackType" title="enum GESTrackType"><span class="type">GESTrackType</span></a></pre>
<p>Type of stream the track outputs. This is used when creating the <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a>
to specify in generic terms what type of content will be outputted.</p>
<p>It also serves as a 'fast' way to check what type of data will be outputted
from the <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> without having to actually check the <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a>'s caps
property.</p>
<p>Flags: Read / Write / Construct Only</p>
<p>Default value: GES_TRACK_TYPE_CUSTOM</p>
</div>
</div>
<div class="refsect1">
<a name="GESTrack.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GESTrack-track-element-added"></a><h3>The <code class="literal">“track-element-added”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *object,
<a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> *effect,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Will be emitted after a track element was added to the track.</p>
<div class="refsect3">
<a name="id-1.3.11.14.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>the <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>effect</p></td>
<td class="parameter_description"><p>the <a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> that was added.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run First</p>
</div>
<hr>
<div class="refsect2">
<a name="GESTrack-track-element-removed"></a><h3>The <code class="literal">“track-element-removed”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a> *object,
<a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> *effect,
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Will be emitted after a track element was removed from the track.</p>
<div class="refsect3">
<a name="id-1.3.11.14.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>the <a class="link" href="GESTrack.html" title="GESTrack"><span class="type">GESTrack</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>effect</p></td>
<td class="parameter_description"><p>the <a class="link" href="GESTrackElement.html" title="GESTrackElement"><span class="type">GESTrackElement</span></a> that was removed.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run First</p>
</div>
</div>
</div>
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