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>vp8dec: 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-videomixer.html" title="videomixer"> 10<link rel="next" href="gst-plugins-good-plugins-vp8enc.html" title="vp8enc"> 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-vp8dec.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 19 <a href="#gst-plugins-good-plugins-vp8dec.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 20 <a href="#gst-plugins-good-plugins-vp8dec.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-videomixer.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-vp8enc.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-vp8dec"></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-vp8dec.top_of_page"></a>vp8dec</span></h2> 32<p>vp8dec</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-vp8dec.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#guint"><span class="type">guint</span></a></td> 47<td class="property_name"><a class="link" href="gst-plugins-good-plugins-vp8dec.html#GstVP8Dec--deblocking-level" title="The “deblocking-level” property">deblocking-level</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-vp8dec.html#GstVP8Dec--noise-level" title="The “noise-level” property">noise-level</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#gboolean"><span class="type">gboolean</span></a></td> 57<td class="property_name"><a class="link" href="gst-plugins-good-plugins-vp8dec.html#GstVP8Dec--post-processing" title="The “post-processing” property">post-processing</a></td> 58<td class="property_flags">Read / Write</td> 59</tr> 60<tr> 61<td class="property_type"><span class="type">GstVP8DecPostProcessingFlags</span></td> 62<td class="property_name"><a class="link" href="gst-plugins-good-plugins-vp8dec.html#GstVP8Dec--post-processing-flags" title="The “post-processing-flags” property">post-processing-flags</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#guint"><span class="type">guint</span></a></td> 67<td class="property_name"><a class="link" href="gst-plugins-good-plugins-vp8dec.html#GstVP8Dec--threads" title="The “threads” property">threads</a></td> 68<td class="property_flags">Read / Write</td> 69</tr> 70</tbody> 71</table></div> 72</div> 73<a name="GstVP8Dec"></a><div class="refsect1"> 74<a name="gst-plugins-good-plugins-vp8dec.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-vp8dec.html#GstVP8Dec-struct" title="struct GstVP8Dec">GstVP8Dec</a></td> 83</tr></tbody> 84</table></div> 85</div> 86<div class="refsect1"> 87<a name="gst-plugins-good-plugins-vp8dec.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> <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/GstVideoDecoder.html#GstVideoDecoder-struct">GstVideoDecoder</a> 93 <span class="lineart">╰──</span> GstVPXDec 94 <span class="lineart">╰──</span> GstVP8Dec 95</pre> 96</div> 97<div class="refsect1"> 98<a name="gst-plugins-good-plugins-vp8dec.description"></a><h2>Description</h2> 99<p>This element decodes VP8 streams into raw video.</p> 100<a class="ulink" href="http://www.webmproject.org" target="_top">VP8</a> is a royalty-free 101<p>video codec maintained by <a class="ulink" href="http://www.google.com/" target="_top">Google 102</a>. It's the successor of On2 VP3, which was the base of the 103Theora video codec.</p> 104<div class="refsect2"> 105<a name="id-1.2.271.7.5"></a><h3>Example pipeline</h3> 106<div class="informalexample"> 107 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 108 <tbody> 109 <tr> 110 <td class="listing_lines" align="right"><pre>1</pre></td> 111 <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 filesrc location<span class="gtkdoc opt">=</span>videotestsrc<span class="gtkdoc opt">.</span>webm <span class="gtkdoc opt">!</span> matroskademux <span class="gtkdoc opt">!</span> vp8dec <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> videoscale <span class="gtkdoc opt">!</span> autovideosink</pre></td> 112 </tr> 113 </tbody> 114 </table> 115</div> 116 This example pipeline will decode a WebM stream and decodes the VP8 video. 117</div> 118<div class="refsynopsisdiv"> 119<h2>Synopsis</h2> 120<div class="refsect2"> 121<a name="id-1.2.271.7.6.1"></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-vpx.html#plugin-vpx">vpx</a> 132 </td> 133</tr> 134<tr> 135<td><p><span class="term">author</span></p></td> 136<td>David Schleef <ds@entropywave.com>, Sebastian Dröge <sebastian.droege@collabora.co.uk></td> 137</tr> 138<tr> 139<td><p><span class="term">class</span></p></td> 140<td>Codec/Decoder/Video</td> 141</tr> 142</tbody> 143</table></div> 144</div> 145<hr> 146<div class="refsect2"> 147<a name="id-1.2.271.7.6.2"></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>video/x-vp8</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>video/x-raw, format=(string)I420, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</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-vp8dec.functions_details"></a><h2>Functions</h2> 201<p></p> 202</div> 203<div class="refsect1"> 204<a name="gst-plugins-good-plugins-vp8dec.other_details"></a><h2>Types and Values</h2> 205<div class="refsect2"> 206<a name="GstVP8Dec-struct"></a><h3>struct GstVP8Dec</h3> 207<pre class="programlisting">struct GstVP8Dec;</pre> 208</div> 209</div> 210<div class="refsect1"> 211<a name="gst-plugins-good-plugins-vp8dec.property-details"></a><h2>Property Details</h2> 212<div class="refsect2"> 213<a name="GstVP8Dec--deblocking-level"></a><h3>The <code class="literal">“deblocking-level”</code> property</h3> 214<pre class="programlisting"> “deblocking-level” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 215<p>Deblocking level.</p> 216<p>Flags: Read / Write</p> 217<p>Allowed values: <= 16</p> 218<p>Default value: 4</p> 219</div> 220<hr> 221<div class="refsect2"> 222<a name="GstVP8Dec--noise-level"></a><h3>The <code class="literal">“noise-level”</code> property</h3> 223<pre class="programlisting"> “noise-level” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 224<p>Noise level.</p> 225<p>Flags: Read / Write</p> 226<p>Allowed values: <= 16</p> 227<p>Default value: 0</p> 228</div> 229<hr> 230<div class="refsect2"> 231<a name="GstVP8Dec--post-processing"></a><h3>The <code class="literal">“post-processing”</code> property</h3> 232<pre class="programlisting"> “post-processing” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> 233<p>Enable post processing.</p> 234<p>Flags: Read / Write</p> 235<p>Default value: FALSE</p> 236</div> 237<hr> 238<div class="refsect2"> 239<a name="GstVP8Dec--post-processing-flags"></a><h3>The <code class="literal">“post-processing-flags”</code> property</h3> 240<pre class="programlisting"> “post-processing-flags” <span class="type">GstVP8DecPostProcessingFlags</span></pre> 241<p>Flags to control post processing.</p> 242<p>Flags: Read / Write</p> 243<p>Default value: Deblock|Demacroblock|Multi-frame quality enhancement</p> 244</div> 245<hr> 246<div class="refsect2"> 247<a name="GstVP8Dec--threads"></a><h3>The <code class="literal">“threads”</code> property</h3> 248<pre class="programlisting"> “threads” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> 249<p>Maximum number of decoding threads.</p> 250<p>Flags: Read / Write</p> 251<p>Allowed values: [1,16]</p> 252<p>Default value: 1</p> 253</div> 254</div> 255<div class="refsect1"> 256<a name="gst-plugins-good-plugins-vp8dec.see-also"></a><h2>See Also</h2> 257<p>vp8enc, matroskademux</p> 258</div> 259</div> 260<div 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