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>rtpredenc: 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-rtpreddec.html" title="rtpreddec"> 10<link rel="next" href="gst-plugins-good-plugins-rtprtxqueue.html" title="rtprtxqueue"> 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%" 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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-rtpredenc"></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-rtpredenc.top_of_page"></a>rtpredenc</span></h2> 32<p>rtpredenc — RTP Redundant Audio Data (RED) encoder</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-rtpredenc.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-rtpredenc.html#GstRtpRedEnc--allow-no-red-blocks" title="The “allow-no-red-blocks” property">allow-no-red-blocks</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#guint"><span class="type">guint</span></a></td> 52<td class="property_name"><a class="link" href="gst-plugins-good-plugins-rtpredenc.html#GstRtpRedEnc--distance" title="The “distance” property">distance</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#gint"><span class="type">gint</span></a></td> 57<td class="property_name"><a class="link" href="gst-plugins-good-plugins-rtpredenc.html#GstRtpRedEnc--pt" title="The “pt” property">pt</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#guint"><span class="type">guint</span></a></td> 62<td class="property_name"><a class="link" href="gst-plugins-good-plugins-rtpredenc.html#GstRtpRedEnc--sent" title="The “sent” property">sent</a></td> 63<td class="property_flags">Read</td> 64</tr> 65</tbody> 66</table></div> 67</div> 68<a name="GstRtpRedEnc"></a><div class="refsect1"> 69<a name="gst-plugins-good-plugins-rtpredenc.other"></a><h2>Types and Values</h2> 70<div class="informaltable"><table class="informaltable" width="100%" border="0"> 71<colgroup> 72<col width="150px" class="name"> 73<col class="description"> 74</colgroup> 75<tbody><tr> 76<td class="datatype_keyword">struct</td> 77<td class="function_name"><a class="link" href="gst-plugins-good-plugins-rtpredenc.html#GstRtpRedEnc-struct" title="struct GstRtpRedEnc">GstRtpRedEnc</a></td> 78</tr></tbody> 79</table></div> 80</div> 81<div class="refsect1"> 82<a name="gst-plugins-good-plugins-rtpredenc.object-hierarchy"></a><h2>Object Hierarchy</h2> 83<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 84 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 85 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 86 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 87 <span class="lineart">╰──</span> GstRtpRedEnc 88</pre> 89</div> 90<div class="refsect1"> 91<a name="gst-plugins-good-plugins-rtpredenc.description"></a><h2>Description</h2> 92<p>Encode Redundant Audio Data (RED) as per RFC 2198.</p> 93<p>This element is mostly provided for chrome webrtc compatibility: 94chrome expects protection packets generated by <a class="link" href="gst-plugins-good-plugins-rtpulpfecenc.html#GstRtpUlpFecEnc"><span class="type">GstRtpUlpFecEnc</span></a> 95to be wrapped in RED packets for backward compatibility purposes, 96but does not actually make use of the redundant packets that could 97be encoded with this element.</p> 98<p>As such, when used for that purpose, only the <a class="link" href="gst-plugins-good-plugins-rtpredenc.html#GstRtpRedEnc--pt" title="The “pt” property"><span class="type">“pt”</span></a> property 99should be set to a payload type different from both the protected and 100protection packets' payload types.</p> 101<p>When using <a class="link" href="gst-plugins-good-plugins-rtpbin.html#GstRtpBin"><span class="type">GstRtpBin</span></a>, this element should be inserted through the 102<a class="link" href="gst-plugins-good-plugins-rtpbin.html#GstRtpBin-request-fec-encoder" title="The “request-fec-encoder” signal"><span class="type">“request-fec-encoder”</span></a> signal.</p> 103<div class="refsect2"> 104<a name="id-1.2.209.7.6"></a><h3>Example pipeline</h3> 105<div class="informalexample"> 106 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 107 <tbody> 108 <tr> 109 <td class="listing_lines" align="right"><pre>1</pre></td> 110 <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> videotestsrc <span class="gtkdoc opt">!</span> x264enc <span class="gtkdoc opt">!</span> video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>h264<span class="gtkdoc opt">,</span> profile<span class="gtkdoc opt">=</span>baseline <span class="gtkdoc opt">!</span> rtph264pay pt<span class="gtkdoc opt">=</span><span class="number">96</span> <span class="gtkdoc opt">!</span> rtpulpfecenc percentage<span class="gtkdoc opt">=</span><span class="number">100</span> pt<span class="gtkdoc opt">=</span><span class="number">122</span> <span class="gtkdoc opt">!</span> rtpredenc pt<span class="gtkdoc opt">=</span><span class="number">122</span> distance<span class="gtkdoc opt">=</span><span class="number">2</span> <span class="gtkdoc opt">!</span> identity drop<span class="gtkdoc opt">-</span>probability<span class="gtkdoc opt">=</span><span class="number">0.05</span> <span class="gtkdoc opt">!</span> udpsink port<span class="gtkdoc opt">=</span><span class="number">8888</span></pre></td> 111 </tr> 112 </tbody> 113 </table> 114</div> 115 This example will send a stream with RED and ULP FEC. 116</div> 117<p>See also: <a class="link" href="gst-plugins-good-plugins-rtpreddec.html#GstRtpRedDec"><span class="type">GstRtpRedDec</span></a>, <span class="type">GstWebRTCBin</span>, <a class="link" href="gst-plugins-good-plugins-rtpbin.html#GstRtpBin"><span class="type">GstRtpBin</span></a></p> 118<div class="refsynopsisdiv"> 119<h2>Synopsis</h2> 120<div class="refsect2"> 121<a name="id-1.2.209.7.8.1"></a><h3>Element Information</h3> 122<div class="variablelist"><table border="0" class="variablelist"> 123<colgroup> 124<col align="left" valign="top"> 125<col> 126</colgroup> 127<tbody> 128<tr> 129<td><p><span class="term">plugin</span></p></td> 130<td> 131 <a class="link" href="gst-plugins-good-plugins-plugin-rtp.html#plugin-rtp">rtp</a> 132 </td> 133</tr> 134<tr> 135<td><p><span class="term">author</span></p></td> 136<td>Hani Mustafa <hani@pexip.com>, Mikhail Fludkov <misha@pexip.com></td> 137</tr> 138<tr> 139<td><p><span class="term">class</span></p></td> 140<td>Codec/Payloader/Network/RTP</td> 141</tr> 142</tbody> 143</table></div> 144</div> 145<hr> 146<div class="refsect2"> 147<a name="id-1.2.209.7.8.2"></a><h3>Element Pads</h3> 148<div class="variablelist"><table border="0" class="variablelist"> 149<colgroup> 150<col align="left" valign="top"> 151<col> 152</colgroup> 153<tbody> 154<tr> 155<td><p><span class="term">name</span></p></td> 156<td>sink</td> 157</tr> 158<tr> 159<td><p><span class="term">direction</span></p></td> 160<td>sink</td> 161</tr> 162<tr> 163<td><p><span class="term">presence</span></p></td> 164<td>always</td> 165</tr> 166<tr> 167<td><p><span class="term">details</span></p></td> 168<td>application/x-rtp</td> 169</tr> 170</tbody> 171</table></div> 172<div class="variablelist"><table border="0" class="variablelist"> 173<colgroup> 174<col align="left" valign="top"> 175<col> 176</colgroup> 177<tbody> 178<tr> 179<td><p><span class="term">name</span></p></td> 180<td>src</td> 181</tr> 182<tr> 183<td><p><span class="term">direction</span></p></td> 184<td>source</td> 185</tr> 186<tr> 187<td><p><span class="term">presence</span></p></td> 188<td>always</td> 189</tr> 190<tr> 191<td><p><span class="term">details</span></p></td> 192<td>application/x-rtp</td> 193</tr> 194</tbody> 195</table></div> 196</div> 197</div> 198</div> 199<div class="refsect1"> 200<a name="gst-plugins-good-plugins-rtpredenc.functions_details"></a><h2>Functions</h2> 201<p></p> 202</div> 203<div class="refsect1"> 204<a name="gst-plugins-good-plugins-rtpredenc.other_details"></a><h2>Types and Values</h2> 205<div class="refsect2"> 206<a name="GstRtpRedEnc-struct"></a><h3>struct GstRtpRedEnc</h3> 207<pre class="programlisting">struct GstRtpRedEnc;</pre> 208</div> 209</div> 210<div class="refsect1"> 211<a name="gst-plugins-good-plugins-rtpredenc.property-details"></a><h2>Property Details</h2> 212<div class="refsect2"> 213<a name="GstRtpRedEnc--allow-no-red-blocks"></a><h3>The <code class="literal">“allow-no-red-blocks”</code> property</h3> 214<pre class="programlisting"> “allow-no-red-blocks” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 215<p>true - can produce RED packets even without redundant blocks (distance==0) false - RED packets will be produced only if distance>0.</p> 216<p>Flags: Read / Write</p> 217<p>Default value: TRUE</p> 218</div> 219<hr> 220<div class="refsect2"> 221<a name="GstRtpRedEnc--distance"></a><h3>The <code class="literal">“distance”</code> property</h3> 222<pre class="programlisting"> “distance” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 223<p>Tells which media packet to use as a redundant block (0 - no redundant blocks, 1 to use previous packet, 2 to use the packet before previous, etc.).</p> 224<p>Flags: Read / Write</p> 225<p>Default value: 0</p> 226</div> 227<hr> 228<div class="refsect2"> 229<a name="GstRtpRedEnc--pt"></a><h3>The <code class="literal">“pt”</code> property</h3> 230<pre class="programlisting"> “pt” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a></pre> 231<p>Payload type FEC packets (-1 disable).</p> 232<p>Flags: Read / Write</p> 233<p>Allowed values: [0,127]</p> 234<p>Default value: 0</p> 235</div> 236<hr> 237<div class="refsect2"> 238<a name="GstRtpRedEnc--sent"></a><h3>The <code class="literal">“sent”</code> property</h3> 239<pre class="programlisting"> “sent” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 240<p>Count of sent packets.</p> 241<p>Flags: Read</p> 242<p>Default value: 0</p> 243</div> 244</div> 245</div> 246<div class="footer"> 247<hr>Generated by GTK-Doc V1.28</div> 248</body> 249</html>
