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Assuming you're using HDMI, it's strange that you had sound but no video. I assume you checked the cable? Did the same thing happen after restarting the console?
Nope, restarting solved it and I did check the cable. I could go back to the PS3 home screen with no issue, so I restarted Ghosts (before my console) and the same thing happened. About 10 minutes after that I was playing multiplayer and my controller went INSANE. It was scrolling up and down randomly, pausing and unpausing the game, not letting me look around. Almost half full battery too, but when I plugged it in, the issue stopped.