I feel like I know the answer to this question, but I really want there to be another answer besides "convert your footage to ProRes" because I've gotten really far into this project and don't want to go back and re-edit the entire thing.
I'm working with footage that I grabbed off of YouTube, Netflix, other sites using Quicktime screen record. I exported it as 1080i. I did not transcode it before working with it in final cut 7. When I put a dip to color dissolve over two clips, I get flashing diagonal lines over the transition. It's ugly.
If someone has a simple, quick solution I would be eternally grateful.