Okey dokey. First, here're the changes to the mpv.conf. This is if you are using jeeb's test build as an external player and you are running Windows in SDR mode. You will need to select d3d11 in the Theater settings, for hardware acceleration. And do not use scalers.
IMPORTANT! d3d11 is not supported in Windows 7.
Yes, this will negate the need for using auto-profiles. That config should be all you need.
If you run Windows in HDR10, the colorspace will be wrong for SDR and you will want to use a profile to correct the colors. This is why I said this was the easiest way to do this.
BUT, putting Windows in HDR10 will allow you to have HDR passthrough in a window (should that be desired). Otherwise, HDR passthrough will only be used when in full screen and has exclusivity of the window.
WARNING! Remember this is a test build. I have tested it, but not with every variable. I believe it should work with most common usages. I mention this because when using this as an external player, it will be used for all videos, and you might find some quirks.
Also, do not use this build for tone-mapping. It does not have the recent algorithm updates/changes and won't have as good a result.
Edited by Doofus, 16 August 2019 - 10:43 AM.