Strange then that none of my HD ProRes settings works. However, now I tried the Uncompressed 8 bits 1080i. And that setting actually worked.
So, any ideas what would make the best source for green screen chroma keying? Any of the HD ProRes settings or the 8 bits Uncompressed? Not sure if it is a good idea to spend more time right now try to fix the ProRes capture.
Thanks.
Johannes