I am using MPC-HC with MadVR. I have calibrated my screen using yCMS. Primaries and grayscale are ok if I check the calibrated result but the overall picture look greenish. Nothing terrible, but I do believe those are not the right colours. Disabling the yCMS calibration does not change the greenish tint - only the primaries go back to the original values (oversaturated, it's a "wide gamut" screen).
I have the feeling the colour space may be the wrong one, but I tried all possible options with no luck.
Under LAV Video Decoder it looks like it's not active, because the active decoder says "none".