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3
Advanced Configuration
preferred settings. As a result, many of the details are established dynamically, which may run
contrary to network security requirements.
In some networks, the RTP/RTSP traffic is carried (tunneled) over Hypertext Transfer Protocol (HTTP)
as that may allow the traffic to cross network boundaries and firewalls. While this method involves
more overhead due to encapsulation, it may be necessary for clients to access the video streams
when HTTP proxies are used.
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 first stream is ch0; the complete
connection string is: rtsp://192.168.250.116/ch0.
If necessary, this stream name can be used to open a video
stream with a third-party video player.
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.
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, NVR,
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).
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.
427-0073-12-12 Version 120
May 2015
3-19
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