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Nexus Configuration Guide
4.8.1
RTP Settings
According to the specification, RTP is originated and received on even port numbers and the
associated RTCP communication uses the next higher odd port number; the default RTP Port is
554. The Stream Name is used when establishing a session from a client. The default value
recognized by FSM for the thermal camera is ch0; the complete connection string is:
rtsp://192.168.250.116/ch0. If necessary, enter the appropriate Stream Name for your
installation.
By default the video stream uses the IP address of the camera. If the Use External IP
parameter is set to "yes", an alternate IP address can be entered.
Note
Always use an even port number for the RTP Port parameter.
4.8.2
Network Options (Unicast/Multicast)
By default, the video streams from the camera are sent using unicast packets rather than
multicast. This means a given packet of IP Video will be sent separately to each client that has
that video stream open (for example, FSM clients, nDVR, and so on). Therefore each additional
client will cause the bandwidth consumption to go up and cause more overhead on the system
in comparison to multicast.
On the other hand, video packets sent using multicast are shared by streaming clients, so
additional clients do not cause bandwidth consumption to go up as dramatically. If the video
streams are used by more than one client/location, it may be wise to use multicast for more
efficient bandwidth usage.
To set the camera to use Multicast, set the Enable Multicast parameter to "yes", and set the
Destination Network address and Destination Port to a unique combination that will not conflict
with other IP Video devices on the network (the Destination Port must be an even number).
Note
If more than one camera is providing multicast streams on the network, be sure to configure
each stream with a unique multicast Destination Network IP address and Destination Port
combination. The destination address on each camera will default to 232.0.1.1 when the
Enable Multicast parameter is set to "yes".
427-0030-00-28, version 100
January 2012
4—Nexus Camera Configuration
4-11
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