CCTV Video Storage & Retrieval Systems 3

Question 1

Which storage format is typically used when exporting CCTV evidence for law enforcement?

Accepted Answer

The proprietary format of the DVR/NVR with its player software

Answer

Evidence is commonly exported in the system's native proprietary format along with the manufacturer's player software to preserve original quality and maintain chain of custody.

Question 2

What is the recommended action when a DVR hard drive shows SMART error warnings?

Accepted Answer

Replace the drive immediately and restore from backup

Answer

SMART errors indicate imminent drive failure; the drive should be replaced immediately and data restored from backup to prevent footage loss.

Question 3

Variable Bit Rate (VBR) recording is preferred over Constant Bit Rate (CBR) in many CCTV systems because:

Accepted Answer

VBR reduces storage consumption during low-activity periods while maintaining quality during high-activity periods

Answer

VBR dynamically adjusts the bitrate based on scene complexity, using less storage during quiet periods and allocating more data when motion or detail increases.

Question 4

What is 'chain of custody' in the context of CCTV video evidence?

Accepted Answer

A documented record of who accessed, handled, or transferred evidence and when

Answer

Chain of custody is a chronological documentation of every person who has accessed or handled evidence, ensuring its integrity and admissibility in legal proceedings.

Question 5

Motion-triggered recording differs from continuous recording primarily in that it:

Accepted Answer

Only records footage when movement is detected, reducing storage consumption

Answer

Motion-triggered recording saves storage by only capturing footage when the system detects movement, significantly reducing the amount of data stored compared to 24/7 continuous recording.

CCTV - Certified CCTV Operator Practice Test

CCTV - Certified CCTV Operator Practice Test

CCTV Video Storage & Retrieval Systems 3