Originally Posted by six_storm
Hopefully there won't be any encryption/decryption problems since I'm going through the cable box.
Your cable box will do one of two things (likely B):
A: Do a pass through signal, in which case it will still be encrypted.
B: Only decrypt the channel your currently watching, and everything else is masked out.
They make IR devices that you can hook to your computer and point at your cable box to change the channels, it is cludgy, but it works.