Dolby Vision now possible through MP4 Mux.

[kazuma]

why are some movies 4000nits MDL on the disc? and other ones 1000nits? what are the differences?

[coopzr]

@RESET_9999 In the case of How to Train Your Dragon (2025), why would the artist put all that effort into a detailed 100nit trim, only to cancel it at 300nits? Feels like a waste of time and effort.

Also, how do the saturation and hue fields work? Are they applied regardless of TV capabilities, or do they target a specific trim?

[RESET_9999]

why are some movies 4000nits MDL on the disc? and other ones 1000nits? what are the differences?

it's a studio decision to grade movies on 4000 or 1000 nits mastering monitor.

@RESET_9999 In the case of How to Train Your Dragon (2025), why would the artist put all that effort into a detailed 100nit trim, only to cancel it at 300nits? Feels like a waste of time and effort.
Also, how do the saturation and hue fields work? Are they applied regardless of TV capabilities, or do they target a specific trim?

Because the 100-nit trim is delivered for the SDR Blu-ray release. Personally, I like when they explicitly cancel trim interpolation to other targets like that. It shows that the colorist knows what he’s doing and that he wanted the 100-nit trim to be more aggressive while keeping the higher targets intact, since most of this movie sits under 300 nits anyway and don't need tone mapping.

When they apply a strong 100-nit trim, if they push it too far, it can result in higher targets appearing brighter than the HDR master. That doesn’t really make sense, because with a 1000-nit MDL DV grade, those trims will be ignored on TVs with a peak brightness higher than the 1000 nits MDL. So if the 100-nit trim ends up brightening beyond the master, an 800-nit TV could actually show a brighter HDR presentation than a 1000-nit+ TV, which isn’t logical. The whole purpose of trims is to fine-tune tone mapping when the content exceeds the TV’s capabilities, not to make the image brighter than the HDR master itself.

[coopzr]

Because the 100-nit trim is delivered for the SDR Blu-ray release.

Makes sense.

Do you mind explaining what saturation and hue fields are and how they work? I don't recall you talking about them in your explanation videos. The only thing I know is that they have something to do with colors... and they appear to be set by the colorist during some parts of movies.

[RESET_9999]

They’re essentially just extra fine-tuning colors controls for the colorist during the SDR trim pass creation. I don’t think I’ve ever seen a 600–1000-nit trim that actually makes use of them, but it’s possible.

[kazuma]

why are some movies 4000nits MDL on the disc? and other ones 1000nits? what are the differences?

it's a studio decision to grade movies on 4000 or 1000 nits mastering monitor.

but what is the benefit of 4000nits over 1000nits? do you get higher brightness on tv's that supports high nits?

[RESET_9999]

That's just the mastering display luminance capabilities used to grade the content. The colorist can grade it as bright as he wants.

[foxbat]

Does CM v2.9 vs 4.0 matter for MEL if the max nits are below the capabilities of my display (LG G5)?
Since no tone mapping is occurring it shouldn't make any difference?

[RESET_9999]

Does CM v2.9 vs 4.0 matter for MEL if the max nits are below the capabilities of my display (LG G5)?
Since no tone mapping is occurring it shouldn't make any difference?

yes, cmv2.9 4000nits MDL dims at 150nits even on our G5. Also no black crush in 4.0
see: https://docs.google.com/spreadsheets/d/ ... 1289366200

[deadchip12]

@RESET9999
Could you check the movie "Bring Her Back" on your LG G5? On my Sony A95L, at the scene where the aspect ratio expands, the top and bottom of the screen become dimmer than the rest. I believe it's an L5 thing, but I've never seen that happen in a film before

[RESET_9999]

yes the original metadata has incorrect L5...
get my cmv4.0 rpu (repack)

[deadchip12]

yes the original metadata has incorrect L5...
get my cmv4.0 rpu (repack)

Thanks. I used your rpu for this movie, too, but it was the earlier version and so the issue was not fixed. Should have waited for this one...

[foxbat]

Does CM v2.9 vs 4.0 matter for MEL if the max nits are below the capabilities of my display (LG G5)?
Since no tone mapping is occurring it shouldn't make any difference?

yes, cmv2.9 4000nits MDL dims at 150nits even on our G5. Also no black crush in 4.0
see: https://docs.google.com/spreadsheets/d/ ... 1289366200

Cool thanks. I have "Monty Python and the Holy Grail" which is a MEL title with a 1000 nit MDL. I shall generate a P8 RPU for it!

[RESET_9999]

1000nits MDL CMV2.9 causes issues on other TVs, but not on our G5, as shown in the data from the link.
I only redo the cmv2.9 4000mdl rpu.