a reply to: wheresthebody
I do this (among many other systems related things) for a living in aviation and federal regulatory environments. Here are some data points for you
First, 'cameras' generally don't store anything. They capture video and send it someplace, either to a monitor to be viewed, or a data storage array
to be stored and recalled later...or both. But the cameras themselves don't 'store' anything, nor do you want them to.
Secondly, you need to decide how your cameras will be powered, and how they will connect to the 'Mother Ship'. Comms can be one of several ways;
wireline (Ethernet), fiber optics, or wireless. Regardless, you'll still need power at the camera location, especially if they're outdoor cameras
with IR capability and/or heaters and fans.
Third, you're probably best NOT to access this data remotely (as you correctly note), because this brings up another whole realm of security issues
which cost money to provision for. You'd be better just having a local DVR type device (we use storage arrays, but you don't need anything that
Forth, you need to consider camera resolution and frame rates. 30 frames per second is generally adequate for most residential applications, and
unless you're needing to zoom WAY in on things, 720p resolution should also be adequate. Yes, you could go with 60 FPS and 4K Ultra-HD resolution,
but just remember those cameras are much more expensive and require exponentially more storage capacity because of the size of the files. (60FPS is
considered real-time. 30FPS is half that, but essentially unrecognizable to the human eye unless it is slowed way down for slow motion.
Fifth, you need to decide if your cameras will be fixed or pan, tilt and zoom (PTZ). Both have benefits. PTZ's can move, but are often looking at
the wrong thing when an event occurs. Fixed cameras have the same field of view all the time, but full coverage requires more cameras for the same
area. Most times a combination of both is best.
As far as brands are concerned, as long as you stick with names you've heard of and not some off-the-wall Chinese brand you should be fine. Panasonic
and many others are out there. The stuff we use is all industrial / commercial stuff so brands like Axis wouldn't mean much to the consumer in a
residential or light commercial installation.
Hope this helps.
ETA - As Network Dude mentioned above, you can solve many of your power concerns with POE cameras, but just remember you will need special POE capable
switches for this, and there is a limit to what the cameras will be able to do. Heaters, for example, are usually not supported as they draw too much
current for POE (some of the newer high end Cisco gear will do it, but this is way out of most consumer's budget range).
What I tried to paint for you is basic CCTV surveillance components and considerations, and something reasonable for a budget. Understand, the sky is
the limit for some of this stuff. I've put in cameras which will pick out a bunny rabbit at over 4 miles, at night, in a snowstorm, under a chain
link fence, but those cameras cost a quarter of a million dollars each, and they only last for about 2,000 hours (less than a year of continuous use).
This was on top of an air traffic control tower at a major international airport.
edit on 6/22/2021 by Flyingclaydisk because: (no reason