uo;<samp>user-agent</samp>&rsquo;</dt>
<dd><p>Override User-Agent header. If not specified, it defaults to the
libavformat identifier string.
</p></dd>
</dl>

<p>When receiving data over UDP, the demuxer tries to reorder received packets
(since they may arrive out of order, or packets may get lost totally). This
can be disabled by setting the maximum demuxing delay to zero (via
the <code>max_delay</code> field of AVFormatContext).
</p>
<p>When watching multi-bitrate Real-RTSP streams with <code>ffplay</code