p>
<a name="pipe"></a>
<h2 class="section"><a href="ffmpeg-protocols.html#toc-pipe">3.16 pipe</a></h2>

<p>UNIX pipe access protocol.
</p>
<p>Read and write from UNIX pipes.
</p>
<p>The accepted syntax is:
</p><div class="example">
<pre class="example">pipe:[<var>number</var>]
</pre></div>

<p><var>number</var> is the number corresponding to the file descriptor of the
pipe (e.g. 0 for stdin, 1 for stdout, 2 for stderr).  If <var>number</var>
is not specified, by default the stdout file descriptor will be us