User manual

DV-IP User Manual v1.01 Feb 28
th
2003
DV-IP User Manual
15
Variable Rate Recording
This advanced page configures each camera for its own individually configured record rates.
Note that although Variable record Rates allow for individual record rates, the system
maximum is still 50pps across all cameras. E.g. 3 cameras running at 40ms (25pps) is not a
valid setting, but 3 cameras running at 16pps (62ms) is a valid setting.
Variable Record - Enables this camera for variable rate recording. If this box is unticked,
the camera will adopt the standard recording profile.
Variable Record Rate(ms) - This is the delay between image updates for this camera in
milliseconds.
Alarm Record Rate(ms) - Delay between images for this camera when an alarm input
assigned to this camera is triggered.
Pre-Alarm Record Rate(ms) - This is the record rate used to store pre-alarmed image(s)
on the RAMdisk for this camera. Pre-Alarmed images show images from a period prior to
alarm activation – e.g. if a person is caught by a VMD alarm on a camera, the pre-alarm
images will show where the person came from before the VMD alarm was triggered.
Number of Pre-Alarm Pictures - The number of buffered pre-alarm images stored on the
RAMdisk for this camera.
RAM Disk Requirement - This figure is calculated from the number of enabled cameras
with Pre-Alarm Recording selected and the requested record image size
Record Duration - This indicates the storage capacity of the system without any alarm
recording. This is estimated from size of video storage, the cameras selected for variable rate
recording, the record rate of each selected camera and the requested image size (KB) of the
recorded images.