Dahua NVR5864-EI2 – 64 Channel WizSense AI Network Video Recorder (2U, 8 HDD Bays)
Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
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Dahua NVR5864-EI2 – 64 Channel WizSense AI Network Video Recorder (2U, 8 HDD Bays)
The Dahua NVR616RH-64-XI is a high-performance 64-channel network video recorder from Dahua's WizMind series, engineered to meet the demands of large commercial, industrial and critical infrastructure surveillance projects. It supports up to 64 IP cameras with resolutions of up to 32MP, delivering outstanding image quality and comprehensive coverage across extensive security networks. Powered by an industrial-grade processor and embedded Linux operating system, the recorder provides up to 1280 Mbps incoming and recording bandwidth and 1024 Mbps outgoing bandwidth, ensuring smooth video management even in high-density deployments. The advanced decoding engine supports up to 40 channels of 1080p video at 30fps, enabling efficient live viewing and playback across multiple displays. The NVR incorporates powerful WizMind AI functions, including face detection and recognition, video metadata analysis, perimeter protection, SMD Plus, AcuPick intelligent search, PPE detection, ANPR, heat mapping, people counting and crowd distribution analysis. These intelligent features significantly improve event detection accuracy and reduce false alarms, helping operators respond more effectively to security incidents.
KEY FEATURES
- Supports up to 64 IP camera channels
- Maximum 1280 Mbps incoming and recording bandwidth
- Up to 32MP camera resolution support
- Advanced AI functions including face recognition and video metadata
- 32-channel SMD Plus intelligent motion detection
- 32-channel perimeter protection
- 64-channel AcuPick support when used with compatible cameras
- Supports ANPR, people counting, heat maps and PPE detection
- 16 SATA HDD bays supporting up to 20TB per drive
- RAID 0, 1, 5, 6 and 10 support
- Redundant power supply for enhanced reliability
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