Vivotek IP Surveillance User Manual download pdf (Page 54)

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User's Manual - 47

Assign Camera in DefaultGroup

a� Click << to delete devices from the DefaultGroup (or right-click the device under DefaultGroup tree

to delete it)� Note that the Delete Camera dialog box will pop up� Click Yes to delete the device along

with the recorded data; click No to delete the device but retain the recorded data; click Cancel to

cancel the delete action� Please note that only those devices which belong to a recording group can

record videos�

b� Click >> to add devices to the DefaultGroup�

c� Recording stream: For dual-stream or multiple-stream device, select the desired source of the

recording stream�

d� Pre-event time: The ST7501 Server has a buffer area; it temporarily holds data up to a certain limit�

Enter a number to decide how much time to record before a event is triggered�

e� Post-event time: Enter a number to decide the duration of recording after a event is triggered�

For example: If both the Pre-event time and Post-event time are set to 10 seconds, a total of 20 seconds

video will be recorded after a event is triggered�

post-

10 sec.

pre-

10 sec.

Trigger Activation

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Vivotek IP Surveillance User Manual Page 54