OK, so what I’m using isn’t a capture card. It’s a MiniDV Deck. The model is JVC BR DV3000. I plug the SEGA Genesis into the composite video & audio in, and plug my TV into the composite video & audio out. The deck is connected to the computer through a firewire cable.
There is no video showing up on the television screen AND Final Cut’s log & capture window. The device settings are all set to the exact same as what worked with the Xbox 360, so it is already set up to capture footage coming in through the deck.
It’s really a baffling situation.