Hang on, why are you talking about downscaling 2160p UHD BR content to 1080p and feeding to the projector? What is the point of all of this, sorry I didn't understand the original posts a couple pages back.Hi. sorry for the delay, I was sick (flu).
I saw that Steve Shaw answered the questions.
About your question about output from the player, according to HDMI Specs. you can't have 2160p24 (movies framerate) 4:2:0 output, it's restriction of specification. The same is happening with 1080p also, you can output 4:2:0 1080p from a player, only 4:2:2 or 4:4:4 from YCbCr or RGB (which is uncompressed).
So it's up to the user and to each player capabilities to select what output colorspace/bit depth can output. For me it will be better to let the player to do all the colorspace/bit depth processing and send to HD Linker 2160p 10/[email protected] the HD Linker to do only the downscale from 2160p->1080p. This will reduce any unwanted extra colorspace conversions, since eeColor can accept 10/12 bit without problem, and keep the signal to RGB also.