/usr/share/gtk-doc/html/gst-plugins-good-plugins-0.10/gst-plugins-good-plugins-udpsrc.html is in gstreamer0.10-plugins-good-doc 0.10.31-1ubuntu1.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>udpsrc</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
<link rel="home" href="index.html" title="GStreamer Good Plugins 0.10 Plugins Reference Manual">
<link rel="up" href="ch01.html" title="gst-plugins-good Elements">
<link rel="prev" href="gst-plugins-good-plugins-taginject.html" title="taginject">
<link rel="next" href="gst-plugins-good-plugins-udpsink.html" title="udpsink">
<meta name="generator" content="GTK-Doc V1.18 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="gst-plugins-good-plugins-taginject.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">GStreamer Good Plugins 0.10 Plugins Reference Manual</th>
<td><a accesskey="n" href="gst-plugins-good-plugins-udpsink.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#gst-plugins-good-plugins-udpsrc.synopsis" class="shortcut">Top</a>
|
<a href="#gst-plugins-good-plugins-udpsrc.description" class="shortcut">Description</a>
|
<a href="#gst-plugins-good-plugins-udpsrc.object-hierarchy" class="shortcut">Object Hierarchy</a>
|
<a href="#gst-plugins-good-plugins-udpsrc.implemented-interfaces" class="shortcut">Implemented Interfaces</a>
|
<a href="#gst-plugins-good-plugins-udpsrc.properties" class="shortcut">Properties</a>
</td></tr>
</table>
<div class="refentry">
<a name="gst-plugins-good-plugins-udpsrc"></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-udpsrc.top_of_page"></a>udpsrc</span></h2>
<p>udpsrc — Receive data over the network via UDP</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-good-plugins-udpsrc.synopsis"></a><h2>Synopsis</h2>
<a name="GstUDPSrc"></a><pre class="synopsis">struct <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc-struct" title="struct GstUDPSrc">GstUDPSrc</a>;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.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/gstreamer-0.10/GstObject.html">GstObject</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html">GstElement</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-libs-0.10/GstBaseSrc.html">GstBaseSrc</a>
+----<a href="/usr/share/gtk-doc/html/gstreamer-libs-0.10/GstPushSrc.html">GstPushSrc</a>
+----GstUDPSrc
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GstUDPSrc implements
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstUriHandler.html#GstURIHandler">GstURIHandler</a>.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--caps" title='The "caps" property'>caps</a>" <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a>* : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--multicast-group" title='The "multicast-group" property'>multicast-group</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--port" title='The "port" property'>port</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--uri" title='The "uri" property'>uri</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--sockfd" title='The "sockfd" property'>sockfd</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--buffer-size" title='The "buffer-size" property'>buffer-size</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--timeout" title='The "timeout" property'>timeout</a>" <span class="type">guint64</span> : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--closefd" title='The "closefd" property'>closefd</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-good-plugins-udpsrc.html#GstUDPSrc--skip-first-bytes" title='The "skip-first-bytes" property'>skip-first-bytes</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--sock" title='The "sock" property'>sock</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--auto-multicast" title='The "auto-multicast" property'>auto-multicast</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-good-plugins-udpsrc.html#GstUDPSrc--multicast-iface" title='The "multicast-iface" property'>multicast-iface</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write
"<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--reuse" title='The "reuse" property'>reuse</a>" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.description"></a><h2>Description</h2>
<p>
udpsrc is a network source that reads UDP packets from the network.
It can be combined with RTP depayloaders to implement RTP streaming.
</p>
<p>
The udpsrc element supports automatic port allocation by setting the
<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--port" title='The "port" property'><span class="type">"port"</span></a> property to 0. After setting the udpsrc to PAUSED, the
allocated port can be obtained by reading the port property.
</p>
<p>
udpsrc can read from multicast groups by setting the <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--multicast-group" title='The "multicast-group" property'><span class="type">"multicast-group"</span></a>
property to the IP address of the multicast group.
</p>
<p>
Alternatively one can provide a custom socket to udpsrc with the <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--sockfd" title='The "sockfd" property'><span class="type">"sockfd"</span></a>
property, udpsrc will then not allocate a socket itself but use the provided
one.
</p>
<p>
The <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--caps" title='The "caps" property'><span class="type">"caps"</span></a> property is mainly used to give a type to the UDP packet
so that they can be autoplugged in GStreamer pipelines. This is very usefull
for RTP implementations where the contents of the UDP packets is transfered
out-of-bounds using SDP or other means.
</p>
<p>
The <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--buffer-size" title='The "buffer-size" property'><span class="type">"buffer-size"</span></a> property is used to change the default kernel
buffersizes used for receiving packets. The buffer size may be increased for
high-volume connections, or may be decreased to limit the possible backlog of
incoming data. The system places an absolute limit on these values, on Linux,
for example, the default buffer size is typically 50K and can be increased to
maximally 100K.
</p>
<p>
The <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--skip-first-bytes" title='The "skip-first-bytes" property'><span class="type">"skip-first-bytes"</span></a> property is used to strip off an arbitrary
number of bytes from the start of the raw udp packet and can be used to strip
off proprietary header, for example.
</p>
<p>
The udpsrc is always a live source. It does however not provide a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstClock.html"><span class="type">GstClock</span></a>,
this is left for upstream elements such as an RTP session manager or demuxer
(such as an MPEG demuxer). As with all live sources, the captured buffers
will have their timestamp set to the current running time of the pipeline.
</p>
<p>
udpsrc implements a <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstUriHandler.html#GstURIHandler"><span class="type">GstURIHandler</span></a> interface that handles udp://host:port
type URIs.
</p>
<p>
If the <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--timeout" title='The "timeout" property'><span class="type">"timeout"</span></a> property is set to a value bigger than 0, udpsrc
will generate an element message named
<code class="classname">"GstUDPSrcTimeout"</code>
if no data was recieved in the given timeout.
The message's structure contains one field:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>
<span class="type">guint64</span>
<code class="classname">"timeout"</code>: the timeout in microseconds that
expired when waiting for data.
</p></li></ul></div>
<p>
The message is typically used to detect that no UDP arrives in the receiver
because it is blocked by a firewall.
</p>
<p>
A custom file descriptor can be configured with the
<a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--sockfd" title='The "sockfd" property'><span class="type">"sockfd"</span></a> property. The socket will be closed when setting the
element to READY by default. This behaviour can be
overriden with the <a class="link" href="gst-plugins-good-plugins-udpsrc.html#GstUDPSrc--closefd" title='The "closefd" property'><span class="type">"closefd"</span></a> property, in which case the application
is responsible for closing the file descriptor.
</p>
<p>
</p>
<div class="refsect2">
<a name="idp12705064"></a><h3>Examples</h3>
<div class="informalexample"><pre class="programlisting">
gst-launch -v udpsrc ! fakesink dump=1
</pre></div> A pipeline to read from the default port and dump the udp packets.
To actually generate udp packets on the default port one can use the
udpsink element. When running the following pipeline in another terminal, the
above mentioned pipeline should dump data packets to the console.
<div class="informalexample"><pre class="programlisting">
gst-launch -v audiotestsrc ! udpsink
</pre></div>
<div class="informalexample"><pre class="programlisting">
gst-launch -v udpsrc port=0 ! fakesink
</pre></div> read udp packets from a free port.
</div>
<p>
</p>
<p>
Last reviewed on 2007-09-20 (0.10.7)
</p>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="idp12256784"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term">plugin</span></p></td>
<td>
<a class="link" href="gst-plugins-good-plugins-plugin-udp.html#plugin-udp">udp</a>
</td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Wim Taymans <wim@fluendo.com>, Thijs Vermeir <thijs.vermeir@barco.com></td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Source/Network</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="idp10584400"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<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>ANY</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstUDPSrc-struct"></a><h3>struct GstUDPSrc</h3>
<pre class="programlisting">struct GstUDPSrc;</pre>
<p>
</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstUDPSrc--caps"></a><h3>The <code class="literal">"caps"</code> property</h3>
<pre class="programlisting"> "caps" <a href="/usr/share/gtk-doc/html/gstreamer-0.10/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a>* : Read / Write</pre>
<p>The caps of the source pad.</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--multicast-group"></a><h3>The <code class="literal">"multicast-group"</code> property</h3>
<pre class="programlisting"> "multicast-group" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write</pre>
<p>The Address of multicast group to join.</p>
<p>Default value: "0.0.0.0"</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--port"></a><h3>The <code class="literal">"port"</code> property</h3>
<pre class="programlisting"> "port" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>The port to receive the packets from, 0=allocate.</p>
<p>Allowed values: [0,65535]</p>
<p>Default value: 4951</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--uri"></a><h3>The <code class="literal">"uri"</code> property</h3>
<pre class="programlisting"> "uri" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write</pre>
<p>URI in the form of udp://multicast_group:port.</p>
<p>Default value: "udp://0.0.0.0:4951"</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--sockfd"></a><h3>The <code class="literal">"sockfd"</code> property</h3>
<pre class="programlisting"> "sockfd" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>Socket to use for UDP reception. (-1 == allocate).</p>
<p>Allowed values: >= G_MAXULONG</p>
<p>Default value: -1</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--buffer-size"></a><h3>The <code class="literal">"buffer-size"</code> property</h3>
<pre class="programlisting"> "buffer-size" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>Size of the kernel receive buffer in bytes, 0=default.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--timeout"></a><h3>The <code class="literal">"timeout"</code> property</h3>
<pre class="programlisting"> "timeout" <span class="type">guint64</span> : Read / Write</pre>
<p>Post a message after timeout microseconds (0 = disabled).</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--closefd"></a><h3>The <code class="literal">"closefd"</code> property</h3>
<pre class="programlisting"> "closefd" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Close sockfd if passed as property on state change.</p>
<p>Default value: TRUE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--skip-first-bytes"></a><h3>The <code class="literal">"skip-first-bytes"</code> property</h3>
<pre class="programlisting"> "skip-first-bytes" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read / Write</pre>
<p>number of bytes to skip for each udp packet.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--sock"></a><h3>The <code class="literal">"sock"</code> property</h3>
<pre class="programlisting"> "sock" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> : Read</pre>
<p>Socket currently in use for UDP reception. (-1 = no socket).</p>
<p>Allowed values: >= G_MAXULONG</p>
<p>Default value: -1</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--auto-multicast"></a><h3>The <code class="literal">"auto-multicast"</code> property</h3>
<pre class="programlisting"> "auto-multicast" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Automatically join/leave multicast groups.</p>
<p>Default value: TRUE</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--multicast-iface"></a><h3>The <code class="literal">"multicast-iface"</code> property</h3>
<pre class="programlisting"> "multicast-iface" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a>* : Read / Write</pre>
<p>The network interface on which to join the multicast group.</p>
<p>Default value: NULL</p>
</div>
<hr>
<div class="refsect2">
<a name="GstUDPSrc--reuse"></a><h3>The <code class="literal">"reuse"</code> property</h3>
<pre class="programlisting"> "reuse" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Enable reuse of the port.</p>
<p>Default value: TRUE</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-good-plugins-udpsrc.see-also"></a><h2>See Also</h2>
udpsink, multifdsink
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.18</div>
</body>
</html>
|