It’s not that hard. Loop the QR, index the frames without the QR payload, do it ~10fps so you account for camera error, then when all frames/packets are completed, you’re good. There’s a ton of QR scanning libraries out there already.

“Ad hominem” is when you try to discredit an argument BY attacking its speaker. Someone saying something about you that you took negatively doesn’t mean they’re trying to attack your argument that way. They might just be changing the subject off of noticing problems with your approach.