
www.eurovideo-cctv.com
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RTP+RTSP
This method (actually RTP over UDP and RTSP over TCP) should be your first
consideration for live video, especially when it is important to always have an up-to-
date video stream, even if some images are lost due to network problems. This could
be configured as multicast or unicast.
Multicasting provides the most efficient usage of bandwidth, especially when there
are large numbers of clients viewing simultaneously. Note however, that a multicast
roadcast couldnot pass a network router unless the router is configured to allow this.
It is thus not possible to multicast over the Internet, for example.
Unicasting should be used for video-on-demand broadcasting, so that there is no
video traffic on the network until a client connects and requests the stream. However,
as more and more unicast clients get connected, the traffic on the network will
increase and may cause congestion. Although there is a maximum of 20 unicast
viewers, note that all multicast users combined count as 1 unicast viewer.
RTP/RTSP
This unicast method is RTP tunneled over RTSP. This could be used to exploit the
fact that it is relatively simple to configure firewalls to allow RTSP traffic.
RTP/RTSP/HTTP or RTP/RTSP/HTTPS
These two methods could also be used to traverse firewalls. Firewalls are commonly
configured to allow the HTTP protocol, allowing RTP to be tunneled.