+.B rtp_max_payload \fBYTES\fR
+Don't send RTP packets with a UDP payload larger than
+.I BYTES
+(including the 12-byte RTP header). If you know that you will be transmitting
+RTP over networks with an unusually low MTU size, then it is probably useful to
+set this option.
+.IP
+This option is experimental,
+and may change or be removed in a future release.
+.TP