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>jpegdec: 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-jackaudiosrc.html" title="jackaudiosrc"> 10<link rel="next" href="gst-plugins-good-plugins-jpegenc.html" title="jpegenc"> 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-jpegdec.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> 19 <a href="#gst-plugins-good-plugins-jpegdec.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> 20 <a href="#gst-plugins-good-plugins-jpegdec.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-jackaudiosrc.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-jpegenc.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-jpegdec"></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-jpegdec.top_of_page"></a>jpegdec</span></h2> 32<p>jpegdec</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-jpegdec.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"><span class="type">GstIDCTMethod</span></td> 47<td class="property_name"><a class="link" href="gst-plugins-good-plugins-jpegdec.html#GstJpegDec--idct-method" title="The “idct-method” property">idct-method</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#gint"><span class="type">gint</span></a></td> 52<td class="property_name"><a class="link" href="gst-plugins-good-plugins-jpegdec.html#GstJpegDec--max-errors" title="The “max-errors” property">max-errors</a></td> 53<td class="property_flags">Read / Write</td> 54</tr> 55</tbody> 56</table></div> 57</div> 58<a name="GstJpegDec"></a><div class="refsect1"> 59<a name="gst-plugins-good-plugins-jpegdec.other"></a><h2>Types and Values</h2> 60<div class="informaltable"><table class="informaltable" width="100%" border="0"> 61<colgroup> 62<col width="150px" class="name"> 63<col class="description"> 64</colgroup> 65<tbody><tr> 66<td class="datatype_keyword">struct</td> 67<td class="function_name"><a class="link" href="gst-plugins-good-plugins-jpegdec.html#GstJpegDec-struct" title="struct GstJpegDec">GstJpegDec</a></td> 68</tr></tbody> 69</table></div> 70</div> 71<div class="refsect1"> 72<a name="gst-plugins-good-plugins-jpegdec.object-hierarchy"></a><h2>Object Hierarchy</h2> 73<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a> 74 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> 75 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a> 76 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a> 77 <span class="lineart">╰──</span> <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/GstVideoDecoder.html#GstVideoDecoder-struct">GstVideoDecoder</a> 78 <span class="lineart">╰──</span> GstJpegDec 79</pre> 80</div> 81<div class="refsect1"> 82<a name="gst-plugins-good-plugins-jpegdec.description"></a><h2>Description</h2> 83<p>Decodes jpeg images.</p> 84<div class="refsect2"> 85<a name="id-1.2.83.7.3"></a><h3>Example launch line</h3> 86<div class="informalexample"> 87 <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> 88 <tbody> 89 <tr> 90 <td class="listing_lines" align="right"><pre>1</pre></td> 91 <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>mjpeg<span class="gtkdoc opt">.</span>avi <span class="gtkdoc opt">!</span> avidemux <span class="gtkdoc opt">!</span> queue <span class="gtkdoc opt">!</span> jpegdec <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> videoscale <span class="gtkdoc opt">!</span> autovideosink</pre></td> 92 </tr> 93 </tbody> 94 </table> 95</div> 96 The above pipeline decode the mjpeg stream and renders it to the screen. 97</div> 98<div class="refsynopsisdiv"> 99<h2>Synopsis</h2> 100<div class="refsect2"> 101<a name="id-1.2.83.7.4.1"></a><h3>Element Information</h3> 102<div class="variablelist"><table border="0" class="variablelist"> 103<colgroup> 104<col align="left" valign="top"> 105<col> 106</colgroup> 107<tbody> 108<tr> 109<td><p><span class="term">plugin</span></p></td> 110<td> 111 <a class="link" href="gst-plugins-good-plugins-plugin-jpeg.html#plugin-jpeg">jpeg</a> 112 </td> 113</tr> 114<tr> 115<td><p><span class="term">author</span></p></td> 116<td>Wim Taymans <wim@fluendo.com></td> 117</tr> 118<tr> 119<td><p><span class="term">class</span></p></td> 120<td>Codec/Decoder/Image</td> 121</tr> 122</tbody> 123</table></div> 124</div> 125<hr> 126<div class="refsect2"> 127<a name="id-1.2.83.7.4.2"></a><h3>Element Pads</h3> 128<div class="variablelist"><table border="0" class="variablelist"> 129<colgroup> 130<col align="left" valign="top"> 131<col> 132</colgroup> 133<tbody> 134<tr> 135<td><p><span class="term">name</span></p></td> 136<td>sink</td> 137</tr> 138<tr> 139<td><p><span class="term">direction</span></p></td> 140<td>sink</td> 141</tr> 142<tr> 143<td><p><span class="term">presence</span></p></td> 144<td>always</td> 145</tr> 146<tr> 147<td><p><span class="term">details</span></p></td> 148<td>image/jpeg</td> 149</tr> 150</tbody> 151</table></div> 152<div class="variablelist"><table border="0" class="variablelist"> 153<colgroup> 154<col align="left" valign="top"> 155<col> 156</colgroup> 157<tbody> 158<tr> 159<td><p><span class="term">name</span></p></td> 160<td>src</td> 161</tr> 162<tr> 163<td><p><span class="term">direction</span></p></td> 164<td>source</td> 165</tr> 166<tr> 167<td><p><span class="term">presence</span></p></td> 168<td>always</td> 169</tr> 170<tr> 171<td><p><span class="term">details</span></p></td> 172<td>video/x-raw, format=(string){ I420, RGB, BGR, RGBx, xRGB, BGRx, xBGR, GRAY8 }, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td> 173</tr> 174</tbody> 175</table></div> 176</div> 177</div> 178</div> 179<div class="refsect1"> 180<a name="gst-plugins-good-plugins-jpegdec.functions_details"></a><h2>Functions</h2> 181<p></p> 182</div> 183<div class="refsect1"> 184<a name="gst-plugins-good-plugins-jpegdec.other_details"></a><h2>Types and Values</h2> 185<div class="refsect2"> 186<a name="GstJpegDec-struct"></a><h3>struct GstJpegDec</h3> 187<pre class="programlisting">struct GstJpegDec;</pre> 188</div> 189</div> 190<div class="refsect1"> 191<a name="gst-plugins-good-plugins-jpegdec.property-details"></a><h2>Property Details</h2> 192<div class="refsect2"> 193<a name="GstJpegDec--idct-method"></a><h3>The <code class="literal">“idct-method”</code> property</h3> 194<pre class="programlisting"> “idct-method” <span class="type">GstIDCTMethod</span></pre> 195<p>The IDCT algorithm to use.</p> 196<p>Flags: Read / Write</p> 197<p>Default value: Faster, less accurate integer method</p> 198</div> 199<hr> 200<div class="refsect2"> 201<a name="GstJpegDec--max-errors"></a><h3>The <code class="literal">“max-errors”</code> property</h3> 202<pre class="programlisting"> “max-errors” <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a></pre> 203<p>Error out after receiving N consecutive decoding errors 204(-1 = never error out, 0 = automatic, 1 = fail on first error, etc.)</p> 205<div class="warning"> 206<p><code class="literal">GstJpegDec:max-errors</code> has been deprecated since version 1.3.1 and should not be used in newly-written code.</p> 207<p>Property wasn't used internally</p> 208</div> 209<p>Flags: Read / Write</p> 210<p>Allowed values: >= G_MAXULONG</p> 211<p>Default value: 0</p> 212</div> 213</div> 214</div> 215<div 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