JVC VN-C20 Instructions Manual page 67

E
Frame Rate
F
Time Display Format
G
Stream
H
Multicast Address / Port
For selecting the acquisition frame rate of the viewer.
In the case of a 1-to-1 connection between VN-C20 and the viewer, it is
recommended that the frame rate of the viewer and VN-C20 be set to the
same value. To play back multiple viewers at different frame rates, set the
frame rate accordingly at the individual viewer.
The frame rate set at the VN-C20 unit will be the upper limit to the
acquisition frame rate of the viewer.
For example, when VN-C20 is set to A15 fpsB, transmission will only be
possible at A15 fpsB even when the client requests for A30 fpsB.
Alternatively, when VN-C20 is set to A15 fpsB and A10 fpsB is requested by
the client, data will be sent at 7.5 fps to enable transmission at even
intervals.
When the frame rate set is smaller than that at the VN-C20 unit, the
frame rate during transmission from VN-C20 decreases when acquisition
is performed via HTTP.
When acquisition is performed via multicast, data volume will not
decrease even when a frame rate that is smaller than that at the VN-C20
unit is set, and the built-in viewer will play back images while skipping
frames.
Selecting a large frame rate will increase the processing load of the
computer on which the viewer is running.
Caution:
● This is different from the frame rate setting at the VN-C20 unit.
Set to a rate such that the CPU burden of the computer does not
exceed 80%. When the CPU is overloaded, the computer may not
function properly.
Select the format for displaying time.
YYYY,MM,DD denote year, month and day respectively while HH,MM,SS
denote hour, minute and second respectively.
For selecting the protocol when the viewer acquires data from VN-C20.
When AHTTPB is selected, recovery will be performed via resending
when packet loss occurs. VN-C20 may be monitored using multiple
viewers when AMulticastB is selected.
Additionally, start multicast sending on the Streaming page of the VN-
C20 unit when playing back via multicast.
Caution:
● When the built-in viewer is launched with AMulticastB specified, a
Windows firewall warning may be displayed. In this case, select
AUnblockB and proceed.
● If ABlockB is selected, the Windows firewall will block the multicast
streams and playback of multicast at the viewer will fail.
For specifying the multicast address and port number.
This is enabled only when AMulticastB is selected for the [Stream] item.
Specify the same value as the parameter that is set on the [Streaming]
page of VN-C20. (A Page 46)
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