Doom9's Forum - View Single Post - How to analyze an HDR video for peak brightness level for the setting of metadata?

Blue_MiSfit · 28th December 2019, 02:23

I'm not sure what to enter when you master HDR content on an SDR display. That's generally not done since you don't really know what you're looking at.

You could just try using some arbitrary values - it's typical in Hollywood to master on a 1000 nit display using the P3 D65 color space. You could express this in x265 using this:

https://x265.readthedocs.io/en/defau...master-display

The above example is for a display with a minimum light level of .0001 nits - in practice most content is not mastered that low. .002 is more common.

This may or may not look good - especially if the content looks good on your display in SDR without any LUT applied to map it.

You could also just skip the master-display param - the result would not be HDR10 compliant but may play correctly on some players.

28th December 2019, 02:23	#8 \| Link
Blue_MiSfit Derek Prestegard IRL Join Date: Nov 2003 Location: Los Angeles Posts: 5,989	I'm not sure what to enter when you master HDR content on an SDR display. That's generally not done since you don't really know what you're looking at. You could just try using some arbitrary values - it's typical in Hollywood to master on a 1000 nit display using the P3 D65 color space. You could express this in x265 using this: https://x265.readthedocs.io/en/defau...master-display The above example is for a display with a minimum light level of .0001 nits - in practice most content is not mastered that low. .002 is more common. This may or may not look good - especially if the content looks good on your display in SDR without any LUT applied to map it. You could also just skip the master-display param - the result would not be HDR10 compliant but may play correctly on some players.