DVR /PVR / CCTV on linux ,help ?

[kamrananvaar]

Hi
I want to make a DVR (digital video recorder) or CCTV setup hooking upto 16 cameras on a computer ,some of the cameras will be motion sensitive ie only record when it is trigered for a set period of time,and some will be recording in a continous loop ,for 2 months the last day gets written on
I have already seen such a system in a shop but it is running windows xp
I have seen some dvr cards on e bay where u get software free as well ,but that only runs in xp
I have googled around and found some sites for PVR setup
I dont think i need expensive tv cards
Any help in the right direction would be appreciated ,what kind of software ,hardware would i need

Thanx in advance

[kamrananvaar]

i,ve been lokking on the net and dvr cards dont seem to be that expensive
i have looked at ebay.co.uk
item no
8766958776 DVR Surveillance CCTV SECURITY CAMERA SPY RECORDER CARD
5869941668 BRAND NEW 16ch 480FPS Real Time DVR card with 1ch Audio
6038223500 16 Channels 4 Real Time 120 FPS CCTV DVR Card, NEW SOFT
6038223637 8 CHANNELS CCTV DIGITAL SURVEILLANCE 240FPS DVR CARD
5869070515 16 Channels - 100 frames CCTV DVR/DSR PCI Card
5870501771 4 Ch CCTV PC CARD VIDEO RECORDING DVR Card FPS X03
8766958776 DVR Surveillance CCTV SECURITY CAMERA SPY RECORDER CARD
7592357510 Linux Window CCTV Alarm + Record DVR CARD *New Software
7592400199 CCTV 16 Channels 4 Real Time 120 FPS DVR Card C03

plus on the dvr cards description it says p3 would suffice

[kamrananvaar]

i,ve tracked down a site
http://www.zoneminder.com/
gonna have a look at it , but on it the hardware requirements are quite high

any other links /projects on similiar lines that anybody knows of
basically i just want to make a low cost cctv system for shops /offices etc