Live Green Screen

Having a premier or after effects feature that will be able to show me green screen in reel time would be amazing. I'd basically be using something like my Canon R5c to run a live video feed, into a laptop which will have a duplicated view onto another monitor. With that I'd like to apply the Green screen in real time. This would be a great feature and something I really needed now, but unfortunately Adobe doesn't support it.

[moved to Idea board by mod]