Using the green screen filter, and slowing down my footage, I have very noticeable flickering on replay. Is there any way of eliminating this? Thanks.
When you slow down footage you are creating frames where there were none before. I'd suggest you do this in a two step process:
1. Slow down your footage and render it. export selfcontained movie, do not recompress all frames.
2. re-import the slowed down footage and apply green screen filter.