Luke Woodbury

I've inherited an old Mac Pro (10.4) with a Blackmagic Design Decklink HD extreme card in it with 3 BNC connectors on the back. I've also got a security camera with BNC connections and the following spec:

Pixels PAL:795(H)x596(V) NTSC:811(H)x508(V)

Video Out: Composite Signal (1.0Vp-p, 75Ω)

Scanning System: PAL:625 Lines, 50 Field/Sec;NTSC:525 Lines, 60 Field/Sec

Electronic Shutter Time Auto:PAL 1/50-1/100,000Sec;NTSC 1/60-1/100,000Sec

I can't get any picture from qt.grab though there are Blackmagic devices selectable, should I be able to? I know its not a standard res and not what the card is expecting. Should I be looking at another type of interface to get the camera data in?

Horizontal Resolution: 600 TV Line
Pixels PAL:795(H)x596(V) NTSC:811(H)x508(V)
TV System: PAL/NTSC
Video Out: Composite Signal (1.0Vp-p, 75Ω)
Scanning System: PAL:625 Lines, 50 Field/Sec;NTSC:525 Lines, 60 Field/Sec
Electronic Shutter Time Auto:PAL 1/50-1/100,000Sec;NTSC 1/60-1/100,000Sec

I can't get any picture from qt.grab though there are Blackmagic devices selectable, should I be able to? I know its not a standard res and not what the card is expecting. Should I be looking at another type of interface to get the camera data in?


blackmagic-card-and-security-cam

I think you will find that the 3 BNC connectors are for component video, not composite like the camera output. So in short, it will not work correctly with a standard CCTV camera...

Wow, back from the dead! I really should have reported my solution:

As you say, the BNC connectors on the card rear are for component, but there is a breakout cable available for this Blackmagic card that allows composite video over BNC. I got one of these and it works fine, but I seem to remember that the lead cost about £80! it does have about 10 connectors on it though...

Blackmagic card and security cam?