Thank you for your awesome work. It seems for the colorimetry flag, the most correct thing to do would be to read the flag from the metadata and then set it in the same manner as FEL/MEL. I’ve actually seen UHD media have a BT.709, P3, and BT.2020 flag. I think for the menu setting, it might be best to have it set to Automatic by default and off by choice.