83dcdc8e   
   XPost: sci.electronics.design, alt.privacy, misc.legal   
   XPost: alt.photography   
   From: member@newsguy.com   
      
   On Mon, 24 Oct 2011 12:13:57 -0700 (PDT), RichD wrote:   
      
   > I was in a laundromat the other day, a typical   
   > downtown retail space.  It has 4 fisheye ceiling   
   > cameras.   4 cameras... a laundromat!   
   >   
   > I guess we've gotten used to it at this point -   
   > Big Brother is always watching.   
   >   
   > But really, they're recorders, not live watchers,   
   > except at places like WalMart. (ever looked   
   > at a WalMart ceiling?)  So my question is,   
   > for a small business, how long do they keep   
   > the DVD?  How far back do their records go?   
   >   
   > They have to swap a disc every 4 hours.  If   
   > they use DVD-R, how many discs do they   
   > typically store?   If DVD-RW, how often do   
   > they recycle the discs?  In either case, do they   
   > have hundreds of discs, going back months?   
   >   
   > Anybody have experience with security systems?   
   >   
   > I don;t know which board to address this question -   
      
   Most camera systems record at 2 frames per second or less.   
   That's all you need to get a clear view of the perp.   
   My one camera can record around 40 hours of video on a 4 gig disk.   
   On another camera, 8 hours on a 2 gig disk.   
      
   Old VHS systems had tape loops that would record for 24 hours at a time.   
   Unless something happened in that time, the tape was not changed out.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)