Canon VK-16 v2.0 Administrator's Manual page 130

Set Motion Detection Recording
Record before event - enter a number of seconds for the amount of recording time
2
before the event occurs (up to 30 seconds).
Note
Record after event - enter a number of seconds for the amount of recording time
3
after the event occurs (up to 999 seconds).
●
Step 7: Set the External Outputs
Note
Click OK to save the new settings and close the dialog.
Click Cancel to discard the new settings.
Note
Tip
130
If Continuous is also set, Record for before event is not
available.
If Record for before event is set, it will take approximately 10
seconds after event occurrence until its display in the viewer.
If the resolution is set to MPEG-4, the frame rate set in the VB-
C60 becomes enabled.
Available external outputs depend on the Camera Server.
Even though the before event and after event fields are set to 0
seconds, video will still be recorded while motion is detected.
Refer to the Chapter 6 for optimizing the Motion Detection
operation.
Click the drop-down menu for the
target external device and set On or
Not specified.