I have an analog camera that outputs a PAL signal. I'm capturing frames from the camera using a capture card which is all working well. The problem I have is getting a flash timed to the frame of the camera. Is there a way to get some sort of sync signal from the camera and use that to trigger the flash? What I was thinking was the PC could tell the flash to arm itself through USB or serial and the flash could then be triggered by the sync signal. I can do the serial or usb part and make a circuit but am not sure how to get the signal from the camera.
Thanks for any replies, Michael