Quote:
Originally Posted by huhn
when a screen think the input image is bt 2020 it has to change it processing because it has to clip/roll of or just squish it in that's totally different from BT 709 or just switching a screen to "native" where the screen still believes the input is "bt 709" or at least should believe that.
or with other word your device may or may not behave totally different between send bt 2020 or native.
but you don't use this option to calibrate and or verify so it shouldn't matter in this case
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Of course the display will process the content differently depending on wheter it's rec-709 or BT2020.
But the BT2020 flag by itself doesn't change anything in the content. As I explained, the only thing it can change is which display mode will be automatically selected by the display when it detects the flag. It's only a flag in the SDR HDMI stream. So if you select the display mode manually, or if the BT2020 flag has no effect on your display, the use of the flag doesn't account for any difference in measurements.