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As a rule of thumb, we recommend 2 Terabytes for a 4 x 4/5MP HD camera setup, as this should give you approx 2 weeks using H.265 @ 20fps and that is on continuous, not motion-detected recording. Network Protocol TCP/IP, DHCP, IPv4, IPv6, DNS, DDNS, NTP, RTSP, SADP, SMTP, SNMP, NFS, iSCSI, ISUP, UPnP™, HTTP, HTTPS
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"
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Face Picture Library Up to 16 face picture libraries, with up to 50,000 face pictures in total (each picture ≤ 512 KB, total capacity ≤ 1 GB)
By NVR 4-ch, 2 MP (H.264/H.265) video analysis for human and vehicle recognition to reduce false alarm; Face Picture Library Up to 16 face picture libraries, with up to 10,000 face pictures in total (each picture ≤ 512 KB, total capacity ≤ 150 MB) 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 This NVR will accept any capacity hard drive (HDD) currently available. Any maximum capacity stated on the manufacturer’s documents is simply based upon the maximum HDD size that was available at the time of release/publication
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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 (to perhaps double or more these figures again). You may only require the full 25 frames per second on certain cameras if things are fast-moving - ie above a till)