rgraph is specified through the
option &lsquo;<samp>graph</samp>&rsquo;.
</p>
<a name="Options-8"></a>
<h3 class="subsection"><a href="ffmpeg-devices.html#toc-Options-8">3.13.1 Options</a></h3>

<dl compact="compact">
<dt>&lsquo;<samp>graph</samp>&rsquo;</dt>
<dd><p>Specify the filtergraph to use as input. Each video open output must be
labelled by a unique string of the form &quot;out<var>N</var>&quot;, where <var>N</var> is a
number starting from 0 corresponding to the mapped input stream
generated by the