Walter, I see it's your first discussion topic, excellent!
Here's the options I see:
- Record on-board an IP camera using an SD card. Main advantage is that you don't need to worry about bandwidth or reliability issues recording off site. Main disadvantage is limited cameras that support this (well) and limited storage for SD card (generally 64GB or 128GB max).
- Analog cameras, I would not recommend if you want to record centrally across a WAN, mainly because it would require buying an encoder on the local side and a NVR on the central side. At that point, you might as well stick a DVR on the local side, cheaper, simpler, less bandwidth.
Do you have certain cameras that you want to use? Why do you want to record centrally? I ask this because there might be other ways to solve this if we understand the motivation there.
It all comes down to the bandwidth between the remote sites and the central site.
If you have the bandwidth to support it, then it's pretty easy, you build your network and add the cameras to the centralized recorder.
If you don't have the bandwidth to support real-time remote recording then there really is no practical solution, you will need to deploy recorders at the remote sites.
Pro Focus LLC | 10/15/15 08:31pm
Here is just my 2 cents at a fairly inexpensive solution:
Each site gets an IP camera (or two?) with edge recording for local, full res recording. Each camera also FTP's a substream to a central NAS, just in case someone steals the camera or card. This will minimize the ability of the subjects to "get away" without some sort of coverage being recorded at the central office. You can make this easier with a VPN between the locations and the central office. Or, if the locations are within range, you could simply use UBNT radios to backhaul the video streams to the central office, but this depends on them being within a few miles of each other.
Sometimes you can get layer 2 connections if the sites have the same provider. More likely if they have fiber to your sites. Otherwise you can get mpls setup with guaranteed amount of bandwidth. It's just $$$$. We do this for phones systems all the time. Seperate with vlans. Voice doesn't take much bandwidth. Video does. I think you could but if there's alot of cameras most likely not economical.
Edge recording on the remote IP camera and then also use the camera's motion detection (less recording). Schedule the recordings to be copied to a local NVR when the link is not so busy.