I have used the all-in-one dash cams for years. They have saved my butt more than once when someone lied about a wreck. I mount one dual-camera dash cam under my rear view mirror that records front and out the drivers side window. I mount another dual-camera dash cam on the rear window which records out the back and out the passenger side. This is OK, but I want something better. The high end security systems use NVRs (network video recorders) and IP cameras. Until recently, NVRs were too expensive for me but now I see mini NVRs for $40, direct from China. I imagine installing a SSD in a mini NVR, and combining that with multiple IP cameras in my vehicle. The catch is: I can not find IP cameras that are suitable for in-car mounting. Has anyone found such things, or am I stuck with huge bullet cameras?