Thank you, you've also inadvertently answered another question I had which was if the Pi Zero has enough grunt to run Hyperion properly or whether its worth going for the Pi 3B instead? Another thing I was wondering is if there is any way of feeding Hyperion the capture image digitally via HDMI splitting instead of that analog capture card as that should make the end result much sharper/accurate.
Your config looks absolutely amazing though and has really motivated me to look further into the DIY aspect because whilst I'm all for simplicity you really seem to get the best out of this with a custom job that is tweaked accordingly to your situation.
Another thing I'm wondering is how does this all handle movies that are in different aspect ratios than the screen? How does the effect translate then with the black borders in real life? Does it still pick up on the action easily?