CCTV Camera Pros Geovision 8.5 Multicam Digital Surveillance System User Manual
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Post-Rec: Keeps on recording for a set period of time after motion stops.
Pre-Rec: Records video for a set period of time before motion starts or an input device is
triggered. This feature allows you to choose RAM or HDD as a pre-recording buffer. The
difference between the two is that RAM can save smaller pre-record from 1 second to 1.5 minutes,
while the hard disk can save larger one from 1 minute to 45 minutes. Click the arrow button to
access more options.
Figure 1-5
[Pre-Record Performance] The amount of physical memory of the computer that the system
is running on determines the pre-recording performance. Some options are grayed out if the
computer does not have enough memory for the selections.
This table shows the maximum pre-recording frame rate and the physical memory
requirements of each setup:
Good
Better
Best
Extra
Maximum pre-recording frames per camera (fps) 15 fps
30 fps
60 fps
90 fps
RAM required
128 MB 256 MB 512 MB 768 MB
Note: The recording frame rate is based on a 320x240 recording size.