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>alsasrc: GStreamer Base 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 Base Plugins 1.0 Plugins Reference Manual"> 8<link rel="up" href="ch01.html" title="gst-plugins-base Elements"> 9<link rel="prev" href="gst-plugins-base-plugins-appsink.html" title="appsink"> 10<link rel="next" href="gst-plugins-base-plugins-appsrc.html" title="appsrc"> 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-base-plugins-alsasrc.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 19 <a href="#gst-plugins-base-plugins-alsasrc.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 20 <a href="#gst-plugins-base-plugins-alsasrc.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-base-plugins-appsink.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> 25<td><a accesskey="n" href="gst-plugins-base-plugins-appsrc.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-base-plugins-alsasrc"></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-base-plugins-alsasrc.top_of_page"></a>alsasrc</span></h2> 32<p>alsasrc</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-base-plugins-alsasrc.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"> 47<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td> 48<td class="property_name"><a class="link" href="gst-plugins-base-plugins-alsasrc.html#GstAlsaSrc--card-name" title="The “card-name” property">card-name</a></td> 49<td class="property_flags">Read</td> 50</tr> 51<tr> 52<td class="property_type"> 53<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td> 54<td class="property_name"><a class="link" href="gst-plugins-base-plugins-alsasrc.html#GstAlsaSrc--device" title="The “device” property">device</a></td> 55<td class="property_flags">Read / Write</td> 56</tr> 57<tr> 58<td class="property_type"> 59<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</td> 60<td class="property_name"><a class="link" href="gst-plugins-base-plugins-alsasrc.html#GstAlsaSrc--device-name" title="The “device-name” property">device-name</a></td> 61<td class="property_flags">Read</td> 62</tr> 63</tbody> 64</table></div> 65</div> 66<a name="GstAlsaSrc"></a><div class="refsect1"> 67<a name="gst-plugins-base-plugins-alsasrc.other"></a><h2>Types and Values</h2> 68<div class="informaltable"><table class="informaltable" width="100%" border="0"> 69<colgroup> 70<col width="150px" class="name"> 71<col class="description"> 72</colgroup> 73<tbody><tr> 74<td class="datatype_keyword">struct</td> 75<td class="function_name"><a class="link" href="gst-plugins-base-plugins-alsasrc.html#GstAlsaSrc-struct" title="struct GstAlsaSrc">GstAlsaSrc</a></td> 76</tr></tbody> 77</table></div> 78</div> 79<div class="refsect1"> 80<a name="gst-plugins-base-plugins-alsasrc.object-hierarchy"></a><h2>Object Hierarchy</h2> 81<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 82 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 83 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 84 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 85 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstBaseSrc.html#GstBaseSrc-struct">GstBaseSrc</a> 86 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-libs-1.0/GstPushSrc.html#GstPushSrc-struct">GstPushSrc</a> 87 <span class="lineart">╰──</span> <a href="../html/GstAudioBaseSrc.html#GstAudioBaseSrc-struct">GstAudioBaseSrc</a> 88 <span class="lineart">╰──</span> <a href="../html/GstAudioSrc.html#GstAudioSrc-struct">GstAudioSrc</a> 89 <span class="lineart">╰──</span> GstAlsaSrc 90</pre> 91</div> 92<div class="refsect1"> 93<a name="gst-plugins-base-plugins-alsasrc.description"></a><h2>Description</h2> 94<p>This element reads data from an audio card using the ALSA API.</p> 95<div class="refsect3"> 96<a name="id-1.2.6.7.3"></a><h4>Example pipelines</h4> 97<div class="informalexample"> 98 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 99 <tbody> 100 <tr> 101 <td class="listing_lines" align="right"><pre>1</pre></td> 102 <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>v alsasrc <span class="gtkdoc opt">!</span> queue <span class="gtkdoc opt">!</span> audioconvert <span class="gtkdoc opt">!</span> vorbisenc <span class="gtkdoc opt">!</span> oggmux <span class="gtkdoc opt">!</span> filesink location<span class="gtkdoc opt">=</span>alsasrc<span class="gtkdoc opt">.</span>ogg</pre></td> 103 </tr> 104 </tbody> 105 </table> 106</div> 107 108<p> 109 Record from a sound card using ALSA and encode to Ogg/Vorbis.</p> 110</div> 111<div class="refsynopsisdiv"> 112<h2>Synopsis</h2> 113<div class="refsect2"> 114<a name="id-1.2.6.7.4.1"></a><h3>Element Information</h3> 115<div class="variablelist"><table border="0" class="variablelist"> 116<colgroup> 117<col align="left" valign="top"> 118<col> 119</colgroup> 120<tbody> 121<tr> 122<td><p><span class="term">plugin</span></p></td> 123<td> 124 <a class="link" href="gst-plugins-base-plugins-plugin-alsa.html#plugin-alsa">alsa</a> 125 </td> 126</tr> 127<tr> 128<td><p><span class="term">author</span></p></td> 129<td>Wim Taymans <wim@fluendo.com></td> 130</tr> 131<tr> 132<td><p><span class="term">class</span></p></td> 133<td>Source/Audio</td> 134</tr> 135</tbody> 136</table></div> 137</div> 138<hr> 139<div class="refsect2"> 140<a name="id-1.2.6.7.4.2"></a><h3>Element Pads</h3> 141<div class="variablelist"><table border="0" class="variablelist"> 142<colgroup> 143<col align="left" valign="top"> 144<col> 145</colgroup> 146<tbody> 147<tr> 148<td><p><span class="term">name</span></p></td> 149<td>src</td> 150</tr> 151<tr> 152<td><p><span class="term">direction</span></p></td> 153<td>source</td> 154</tr> 155<tr> 156<td><p><span class="term">presence</span></p></td> 157<td>always</td> 158</tr> 159<tr> 160<td><p><span class="term">details</span></p></td> 161<td>audio/x-raw, format=(string){ S8, U8, S16LE, S16BE, U16LE, U16BE, S24_32LE, S24_32BE, U24_32LE, U24_32BE, S32LE, S32BE, U32LE, U32BE, S24LE, S24BE, U24LE, U24BE, S20LE, S20BE, U20LE, U20BE, S18LE, S18BE, U18LE, U18BE, F32LE, F32BE, F64LE, F64BE }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]</td> 162</tr> 163</tbody> 164</table></div> 165</div> 166</div> 167</div> 168<div class="refsect1"> 169<a name="gst-plugins-base-plugins-alsasrc.functions_details"></a><h2>Functions</h2> 170<p></p> 171</div> 172<div class="refsect1"> 173<a name="gst-plugins-base-plugins-alsasrc.other_details"></a><h2>Types and Values</h2> 174<div class="refsect2"> 175<a name="GstAlsaSrc-struct"></a><h3>struct GstAlsaSrc</h3> 176<pre class="programlisting">struct GstAlsaSrc;</pre> 177<p>Opaque data structure</p> 178</div> 179</div> 180<div class="refsect1"> 181<a name="gst-plugins-base-plugins-alsasrc.property-details"></a><h2>Property Details</h2> 182<div class="refsect2"> 183<a name="GstAlsaSrc--card-name"></a><h3>The <code class="literal">“card-name”</code> property</h3> 184<pre class="programlisting"> “card-name” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre> 185<p>Human-readable name of the sound card.</p> 186<p>Flags: Read</p> 187<p>Default value: ""</p> 188</div> 189<hr> 190<div class="refsect2"> 191<a name="GstAlsaSrc--device"></a><h3>The <code class="literal">“device”</code> property</h3> 192<pre class="programlisting"> “device” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre> 193<p>ALSA device, as defined in an asound configuration file.</p> 194<p>Flags: Read / Write</p> 195<p>Default value: "default"</p> 196</div> 197<hr> 198<div class="refsect2"> 199<a name="GstAlsaSrc--device-name"></a><h3>The <code class="literal">“device-name”</code> property</h3> 200<pre class="programlisting"> “device-name” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *</pre> 201<p>Human-readable name of the sound device.</p> 202<p>Flags: Read</p> 203<p>Default value: ""</p> 204</div> 205</div> 206<div class="refsect1"> 207<a name="gst-plugins-base-plugins-alsasrc.see-also"></a><h2>See Also</h2> 208<p>alsasink</p> 209</div> 210</div> 211<div class="footer"> 212<hr>Generated by GTK-Doc V1.28</div> 213</body> 214</html>
