1) yes but you are very limited, particularly if you want to use advanced motion detection available in the camera.
2) I mean different sensitivity for motion recording vs motion alerts. You cannot do that with an nvr. This allows you to set the threshold higher for alerts (to avoid false alerts, but lower for recording so you never miss anything)
3) To clarify, with an NVR you need to manually set day/night, this time changes though the year. With
blue iris it will automatically adjust relative to sunrise sunset in your specific location - this lets you dial in perfect motion settings for day/night. You can also set different thresholds for when you are away vs home etc..
4)Yes, but not on the fly from the app with one press of a button like you can with blue iris. What do people do when they get home? You cant expect someone to manually make the changes each time. This is my biggest issue with NVR;s.
5) I never used idmss, but its light years ahead of hikvisions ivms4500.
6) I mean the server application - the software running on the pc, for video review and setup.
7) can they record to nas? even if so, you need to buy the more expensive units
8) I havent seen an NVR with a per camera quota but if so, its likely the more expensive units.
9) You can take a single camera feed and virtually split it into two cameras.
10) If you mean the hik cube, i dont believe this is possible.
11) agreed
12) I haven't seen this option is the 200-400 range nvr's
13) At least with hikvision, video cannot be uploaded ftp.
There are many more features and functions that usera like about blue iris, would take all day to discuss them. But even for above functions alone I would not switch back even if the NVR was free to me. I'm not saying NVR's are bad - for most folks who just want basic recording and forget about the device, its the best solution. But personally I could never user one after seeing what pc based software can do. The developer constantly adds function to the software as well.