The only advantage I see to CCTV over IP right now is the real time; zero latency.. IP cameras are about a second or two behind on a monitoring station; but im not sure what scenario's this would be a deal breaker (Casino?)... The IP cameras them selves are horribly insecure so you need to take appropriate steps/precautions at the network level to keep the devices secure.. imho if done right they are more secure than a CCTV system if you have the cameras authenticate with the switch port to put them on there own vlan.. if someone unplugs the camera they get no network access from the port and since they are on there own lan you can firewall them off from everything but what they need.
IP is all digital; more bandwidth; higher resolutions; requires less resources to record; allows for alot of video processing to be done in real time on the camera.. You can have multiple devices displaying cameras simultaneously from various locations with network access without a dedicated IP Recorder.. IP Cameras will also be less influenced by poor cable runs and EMI Interference.
Not to mention with PoE means one cable run for power/video/audio and ethernet cable is more adaptable and suited for future tech over analogue video cables.. Its also easier to deploy to monitor very remote locations as you can bridge locations with fiberoptic cables or point to point wireless bridges.
There are very few arguments for Analogue CCTV over IP Cameras unless you already have a massive analogue infrastructure that its cost prohibitive to replace.
^^ Agreed. I'm guessing what you're really asking is the difference between analog and megapixel. In the simplest terms of catching your crook, murderer, neighbor behaving badly, local drug dealers, and general asswipes, it's a crap shoot either way. Analog can be perfectly capable of giving you the absolute ID shot. Megapixel tilts the odds in your favor with higher resolution. Either system has to be well thought out and implemented or both systems can fail to deliver the 1-2 punch. If you think purely in terms of dollars and cents, you're setting yourself up for failure. You can be budget savvy and make smart purchases for the good of your needs and come out ahead, or better. But in the end, all of it takes a back seat to the first decision- what are your objectives; what do you need to see and how well do you really need to see it. From there, if you stay true to what you really need, everything else will become obvious.
Thanks for the responses. I will continue to build my IP system. Another newbie question: Simply put, does a LAN ever get over crowed running 16 cameras? In our situation we have around 35 devices on our network at any given time, much of it hard wired with a 24 port ethernet switch, just wonder if there's a saturation point I need to be concerned about.
Not to beat a dead horse, but one additional comment on cctv vs. IP (at least in my very limited experience) - the software that I've dealt with on two different vendors' DVRs is (putting it nicely) inadequate, as is the system's access over the internet. I installed both cctv and ip cameras (because I didn't know about this site and I wanted to evaluate which would work best for me). Ultimately I found that an IP based system was far easier to implement, manage, and administer. I deinstalled 8 cctv cameras after a year or so of frustrating use. I now have 7 IP-based ptz cameras installed and no noticeable impact on my intranet. I have only used Blue Iris software - I found it so useful and flexible that I didn't need to go searching for anything else.
One thing I would change on my IP based system is that instead of dealing with power supplies for each camera, I would use cat6 and PoE switches. I'll probably end up retrofitting that way as I upgrade cameras in the future.