Vicon V992B-IR4, Руководство по установке

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• Multicasting is bandwidth-conserving technology that reduces bandwidth usage by
simultaneously delivering a single stream of information to multiple network recipients. This
technology is used primarily on delimited networks (intranets), as each user needs an
uninterrupted data flow and should not rely on network routers. (Note that multicasting may
not be available with the firmware you received; check the Vicon website for updated
firmware.)
3.2 How to Stream H.264
Deciding on the combination of protocols and methods to use depends on your viewing
requirements, and on the properties of your network. Setting the preferred method(s) is done
in webpage.
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.
RTP/RTSP/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 10 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.