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Video Recording and Storage Flashcards

7 cards from real CCTV practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Video Recording and Storage flashcards as text

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

    Answer: To automatically reboot the recorder if it becomes unresponsive

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

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

    Answer: Images Per Second

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

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

    Answer: Proprietary encrypted format with a bundled player

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

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

    Answer: Reduces storage requirement by approximately 50%

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

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

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

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

  6. What does 'dual-stream' recording mean in an IP camera system?

    Answer: Transmitting a high-resolution stream for storage and a low-resolution stream for live view

    Dual-stream allows the camera to send a high-quality stream to the NVR for storage while delivering a lower-resolution stream to conserve bandwidth for remote viewing.

  7. What is 'edge recording' in a CCTV system?

    Answer: Recording video directly on the camera's built-in SD card or storage

    Edge recording stores video locally on the camera itself (typically a microSD card), providing a backup if the network or NVR fails.