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<div class="refentry" title="zbar">
<a name="gst-plugins-bad-plugins-zbar"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-zbar.top_of_page"></a>zbar</span></h2>
<p>zbar — Detect bar codes in the video streams</p>
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<div class="refsynopsisdiv" title="Synopsis">
<a name="gst-plugins-bad-plugins-zbar.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="gst-plugins-bad-plugins-zbar.html#GstZBar" title="GstZBar">GstZBar</a>;
</pre>
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<div class="refsect1" title="Properties">
<a name="gst-plugins-bad-plugins-zbar.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="gst-plugins-bad-plugins-zbar.html#GstZBar--message" title='The "message" property'>message</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" title="Description">
<a name="gst-plugins-bad-plugins-zbar.description"></a><h2>Description</h2>
<p>
Detect bar codes in the video streams and send them as element messages to
the <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstBus.html"><span class="type">GstBus</span></a> if .<a class="link" href="gst-plugins-bad-plugins-zbar.html#GstZBar--message" title='The "message" property'><span class="type">"message"</span></a> property is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.
</p>
<p>
The element generate messages named
<code class="classname">"barcode"</code>. The structure containes these
fields:
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem"><p>
<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a>
<code class="classname">"timestamp"</code>:
the timestamp of the buffer that triggered the message.
</p></li>
<li class="listitem"><p>
gchar*
<code class="classname">"type"</code>:
the symbol type.
</p></li>
<li class="listitem"><p>
gchar*
<code class="classname">"symbol"</code>:
the deteted bar code data.
</p></li>
<li class="listitem"><p>
gint
<code class="classname">"quality"</code>:
an unscaled, relative quantity: larger values are better than smaller
values.
</p></li>
</ul></div>
<p>
</p>
<p>
</p>
<div class="refsect2" title="Example launch lines">
<a name="id411338"></a><h3>Example launch lines</h3>
<div class="informalexample">
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<td class="listing_lines" align="right"><pre>1</pre></td>
<td class="listing_code"><pre class="programlisting">gst<span class="symbol">-</span>launch <span class="symbol">-</span>m v4l2src <span class="symbol">!</span> ffmpegcolorspace <span class="symbol">!</span> zbar <span class="symbol">!</span> ffmpegcolorspace <span class="symbol">!</span> xvimagesink</pre></td>
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This pipeline will detect barcodes and send them as messages.
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
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<td class="listing_lines" align="right"><pre>1</pre></td>
<td class="listing_code"><pre class="programlisting">gst<span class="symbol">-</span>launch <span class="symbol">-</span>m v4l2src <span class="symbol">!</span> tee name<span class="symbol">=</span>t <span class="symbol">!</span> queue <span class="symbol">!</span> ffmpegcolorspace <span class="symbol">!</span> zbar <span class="symbol">!</span> fakesink t<span class="symbol">. !</span> queue <span class="symbol">!</span> xvimagesink</pre></td>
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Same as above, but running the filter on a branch to keep the display in color
</div>
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<div class="refsect1" title="Details">
<a name="gst-plugins-bad-plugins-zbar.details"></a><h2>Details</h2>
<div class="refsect2" title="GstZBar">
<a name="GstZBar"></a><h3>GstZBar</h3>
<pre class="programlisting">typedef struct {
} GstZBar;
</pre>
<p>
Opaque data structure.</p>
</div>
</div>
<div class="refsect1" title="Property Details">
<a name="gst-plugins-bad-plugins-zbar.property-details"></a><h2>Property Details</h2>
<div class="refsect2" title='The "message" property'>
<a name="GstZBar--message"></a><h3>The <code class="literal">"message"</code> property</h3>
<pre class="programlisting"> "message" <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre>
<p>Post a barcode message for each detected code.</p>
<p>Default value: TRUE</p>
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