CCTV Video Recording and Storage 4

Question 1

What is the function of a 'watchdog' feature in CCTV recorders?

Accepted Answer

To automatically reboot the recorder if it becomes unresponsive

Answer

A watchdog timer detects system hangs and automatically restarts the recorder to restore normal operation without manual intervention.

Question 2

In CCTV, what does 'IPS' stand for in the context of recording speed?

Accepted Answer

Images Per Second

Answer

IPS (Images Per Second) is used with DVRs to indicate how many video frames per second the system can record across all connected cameras.

Question 3

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

Accepted Answer

Proprietary encrypted format with a bundled player

Answer

Many DVR/NVR manufacturers export clips in a proprietary encrypted format bundled with a standalone player to preserve chain of custody and prevent tampering.

Question 4

What is the effect of lowering the recording frame rate from 30 fps to 15 fps?

Accepted Answer

Reduces storage requirement by approximately 50%

Answer

Halving the frame rate roughly halves the number of frames recorded per unit time, reducing storage needs by approximately 50%.

Question 5

What type of hard drive is specifically designed and recommended for continuous CCTV recording workloads?

Accepted Answer

Surveillance-grade drives (e.g., WD Purple, Seagate SkyHawk)

Answer

Surveillance-grade drives are optimized for 24/7 write-heavy workloads, simultaneous multi-stream recording, and high drive temperatures common in NVR enclosures.

CCTV - Closed Circuit Television Practice Test

CCTV - Closed Circuit Television Practice Test

CCTV Video Recording and Storage 4