I don't know if this is even possible and I need some advice from the expert in here. I want to have an arduino with two female HDMI connectors, one connects to a cable box and the other to the TV via a HDMI cable. If that's possible, can the arduino read the info that it is passing through the HDMI inputs? If it can what kind of info would I be getting. Thanks in advance.
Doubtful. Too much data, too high a data rate.