Dahua NVR5208-8P-XI/Pro – 8CH WizMind AI PoE Network Video Recorder (2 HDD, 512 Mbps, 8K HDMI)
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 NVR5208-8P-XI/Pro – 8CH WizMind AI PoE Network Video Recorder (2 HDD, 512 Mbps, 8K HDMI)
The Dahua NVR5208-8P-XI/Pro is part of the WizMind XI Pro Series, representing Dahua’s most advanced AI-driven NVR platform. It is designed for professional surveillance environments where deep AI analytics, ultra-high bandwidth processing, and advanced video search capabilities are required. It supports up to 8 IP camera channels, but delivers enterprise-level performance with extremely powerful AI processing and decoding capabilities, making it ideal for intelligent surveillance rather than high channel count alone. The recorder supports up to 512 Mbps incoming, recording, and outgoing bandwidth, allowing it to manage multiple ultra-high-resolution video streams, including cameras up to 32MP. A major upgrade in the Pro version is enhanced AI processing and improved system architecture, supporting advanced intelligent functions such as:
- AcuPick smart video retrieval and indexing
- WizSeek AI search engine
- Face detection and recognition
KEY FEATURES
- 8-channel IP video recording
- Integrated 8-port PoE switch
- Ultra-high 512 Mbps bandwidth
- Supports IP cameras up to 32MP
- WizMind XI Pro AI platform
- AcuPick smart video search
- WizSeek AI search engine
- Face detection and recognition (up to 200,000 faces)
- Perimeter protection (intrusion & tripwire)
- SMD Plus intelligent motion detection
- Video metadata analytics (human/vehicle classification)
- AI camera support (ANPR, heat map, people counting, PPE detection)
- Smart H.265+ compression
- HDMI output up to 8K
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