samp>localrtpport</samp>&rsquo; (the local RTP port) is not set any available
port will be used for the local RTP and RTCP ports.

</li><li>
If &lsquo;<samp>localrtcpport</samp>&rsquo; (the local RTCP port) is not set it will be
set to the local RTP port value plus 1.
</li></ol>

<a name="rtsp"></a>
<h2 class="section"><a href="ffmpeg-protocols.html#toc-rtsp">3.28 rtsp</a></h2>

<p>Real-Time Streaming Protocol.
</p>
<p>RTSP is not technically a protocol handler in libavformat, it is a demuxer
and muxer. The