I also have A7s II , XAVC s files, but I , like tha gu y at Blackmagic suggested, made optimized media, an I also have the Titan X card thogether with another 980 card ( but on ly use one in resolve, of course, coz, free verison) I get the blue screen often. I never tried to transcode the medoa then, They higly recomende that , team from Blackmagic, .I will prbably try that, I bought the full verion just today, and then I can use both the graphic cards, so
I am curious to see how that works 🙂