You can't get a colour space of 4:4:4 @ 10bit. Not enough bandwidth on hmii 2.0.
No HDR signals, no HDR image. It seems to be more like a own HDR version what can't be exactly, because of the signals/data. It's a lot of work for developers and other guys to implement HDR correct. You can turn off HDR via button to go back to SDR but you can't activate HDR if it doesn't exist for the given content. It will look differently but its not true HDR.
Before using such a button, go to the picture settings and calibrate it with professional test images instead.(no blogs, no YouTube or other online videos - uncompressed test images) Imo, You will get better pictures.
Another possibility: it's just a stupid naming for the auto HDR mode.... (use HDR signals instead of SDR signals, while SDR is your standard)
Works fine on my original mi box without a issue.
if you don't mind a newbie question, I've just bought my first mi box as I have a 10yo full HD TV set. this part of options got me confused, SDR to HDR, HDR to SDR and color depth (?). what should be set in my case?
The bottom line here is the Mi Boxes suck. Buy a Shield.
If you hate this comment, I don't care. It's the truth. Cheap boxes have poor performance. Period.
Why would you want to do this? It's not like there's suddenly a wider color gamut for SDR content with this option...I can only imagine that this makes content look worse