Dahua NVR616DRH-128-XI 128-Channel WizMind AI Network Video Recorder with 16 HDD Bays, LCD Display, RAID, Redundant Power & 8K Output
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 NVR616DRH-128-XI 128-Channel WizMind AI Network Video Recorder with 16 HDD Bays, LCD Display, RAID, Redundant Power & 8K Output
The Dahua NVR616DRH-128-XI is one of the most powerful recorders in Dahua's WizMind NVR6-XI range, providing intelligent video management for enterprise, government, transportation, industrial and critical infrastructure applications. Supporting up to 128 IP camera channels with resolutions up to 32MP, it is engineered to handle large surveillance networks while maintaining exceptional recording and playback performance. Equipped with an industrial-grade processor and embedded Linux operating system, the recorder delivers up to 1280 Mbps incoming bandwidth, 1280 Mbps recording bandwidth, and 1024 Mbps outgoing bandwidth, ensuring smooth operation across high-density camera deployments. Its powerful decoding engine supports up to 32 channels of 1080p at 30fps decoding and advanced multi-screen monitoring. The recorder incorporates Dahua's advanced WizMind AI technology, offering intelligent features such as face detection and recognition, video metadata analysis, perimeter protection, SMD Plus, AcuPick intelligent search and PPE detection. It supports up to 40 face databases with a total capacity of 300,000 face images, enabling rapid identification, intelligent event filtering and efficient forensic investigations. AI functions can also be performed by compatible cameras, including ANPR, people counting, heat mapping, crowd distribution analysis and stereo analytics.
KEY FEATURES
- Supports up to 128 IP camera channels
- Maximum 1280 Mbps incoming bandwidth
- Maximum 1280 Mbps recording bandwidth
- Maximum 1024 Mbps outgoing bandwidth
- Supports camera resolutions up to 32MP
- AI by Recorder: Face detection, face recognition, video metadata, perimeter protection, SMD Plus, AcuPick and PPE detection
- Supports up to 64-channel AcuPick with compatible cameras
- Face database capacity of up to 300,000 face images
- AI by Camera support for ANPR, people counting, heat maps, crowd distribution and stereo analysis
- 16 SATA HDD bays supporting up to 20TB per drive
- RAID 0, 1, 5, 6 and 10 support
- Hot-swappable HDD design
- Integrated LCD status display
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