Converting an older security system from vhs to computer based

["seelet" <slechert@xxxxxxxxx>]

I have an old camera system currently with 4 cameras displaying on a
monitor that switches the camera displayed about every 2 secs.  the
system is backed up on an old vhs recorder, i would like to get rid of
the vhs and hook it up to a computer through i assume a capturing card.
The monitor is hooked up to the vhs recorder using standard audio/video
auxillary cables.
does anyone have a suggestion to what i would need?

>From what I have collected on from some intense searching a decent
capturing card seems to be the solution.

Can anyone suggest some websites that may help in my request?