Security Camera

chuckles1066

Cobi wrote: »

To clarify here, the camera only needs to be 25 frames / sec, the DVR (capture card or otherwise) should be capable of number of cameras *25 (For PAL) to get full frame rate. So if you have 4 PAL cameras, 100fps.

That said, good quality images come from more than being able to record at full frame rate, but it does help.

I'm more than happy to stand corrected but I'm not sure you're right with that assertion?

fps = frames per second

100fps gets you real time motion; i.e you watch the postman walk up your path at normal speed, if he drops a letter and picks it up your camera will pick it up.

25fps = 1 "snapshot" every four seconds.........ever seen those CCTV images from shops on Watchdog where the thug appears at point a, then at point b 15 feet away, then at point c another 15 feet away? It's because the shop isn't using 100fps kit.

If you have 4 cameras operating at 25fps then your output is going to be 25fps.

chuckles1066

bookduck wrote: »

I'm impressed with chuckles1066 setup!

Thanks, but I wish it wasn't necessary :mad:

A sign of the times in the country we live, I'm afraid..........

superscaper

chuckles1066 wrote: »

25fps = 1 "snapshot" every four seconds.........ever seen those CCTV images from shops on

That's not right. 25 frames per second, is one "snapshot" every 0.04 seconds. Ordinary TV programmes run at 25 fps (on PAL).

itm2

Edimax also do a wireless IP cam for about £50

Cobi

chuckles1066 wrote: »

I'm more than happy to stand corrected but I'm not sure you're right with that assertion?

fps = frames per second

100fps gets you real time motion; i.e you watch the postman walk up your path at normal speed, if he drops a letter and picks it up your camera will pick it up.

25fps = 1 "snapshot" every four seconds.........ever seen those CCTV images from shops on Watchdog where the thug appears at point a, then at point b 15 feet away, then at point c another 15 feet away? It's because the shop isn't using 100fps kit.

If you have 4 cameras operating at 25fps then your output is going to be 25fps.

25 frames per second is PAL full framefrate motion, 30 frames per second is NTSC full framerate motion. 100 frames per second cameras are typically only used for industrial imaging and cost $$$$$.

When images on CCTV appear sub-full frame rate (for convential camera / DVR systems) it's because they DVR hardware doesn't have a high enough fps rate to capture all the images, or they intentionally do it to make the archived video take up less space.

You typically see 4 channel DVR's being advertised as 100fps full frame rate. This is 100fps divided amoung the four channels. 8 Channel DVRs 200 fps full frame rate etc etc.

espresso

Aldi will be selling a weatherproof wireless CCTV camera with microphone and night vision on Sunday for £39. More details here.