If you have a large number of cameras streaming in multicast, you can improve your
system performance by assigning a different multicast port number to each camera on your
system.
What you should know
There is a known issue that causes Windows to use a lot of CPU to process multicast
packets when they are on the same port. This issue effectively limits the maximum throughput
on a single port at around 100 Mbps. By default, the system only increments the multicast
address assigned to every video encoder it discovers, not the port numbers. If you frequently
use multicast, you should also change the port number. For example, if you use Auxiliary
Archiver roles or if everything is recorded in multicast.
Procedure
To change the multicast port on all video encoders:
-
From the Config Tool homepage, open the Video task and click the
Roles and units view.
-
Select the Media Router and click the Properties tab.
-
In the Multicast section, turn on the Increment
ports option.
-
Click Apply.
To change the multicast port on a specific video encoder:
-
From the Config Tool homepage, open the Video task and click the
Roles and units view.
-
Select the camera to configure, and click the Video tab.
-
In the Network settings section, beside Multicast
address, set the port number you want to use.
-
Click Apply.
-
To restart the video unit, select the unit in the roles and units view, and click
Reboot (
) in the
toolbar.
NOTE: If the new port is being used by another stream, your change is automatically
reverted.