;</dt>
<dd><p>Use HTTP tunneling as lower transport protocol, which is useful for
passing proxies.
</p></dd>
</dl>

<p>Multiple lower transport protocols may be specified, in that case they are
tried one at a time (if the setup of one fails, the next one is tried).
For the muxer, only the &lsquo;<samp>tcp</samp>&rsquo; and &lsquo;<samp>udp</samp>&rsquo; options are supported.
</p>
</dd>
<dt>&lsquo;<samp>rtsp_flags</samp>&rsquo;</dt>
<dd><p>Set RTSP flags.
</p>
<p>The following values are accepted:
</p><dl c