problems rec709 to dci_xyz in resolve

[Pepijn Klijs]

I think you are apllying the conversion twice. Once with the LUT and the second time by rendering to TIFF XYZ.

So try with just the TIFF render options and see what they say.

But isn’t Clipster itself a better option to do the colortransform? I mean, isn’t it easier to deliver in TIFF RGB and let Clipster do the magic?

In my little experience doing DCP’s I never got a decent result out of Resolve. Luminance shifts and white point shift. (too yellow).

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl

[Prathvish Hegde]

i had given them rec709 and i was not happy with the output so wanted to see if converting to xyz and exporting is a better option.

i will try by exporting xyz tiff without applying rec709 to dcixyz lut.

prathvish hegde
colorist
(DaVinci Resolve and 2Kplus)

https://www.youtube.com/playlist?list=PLRPJQ3fIEoojI3JMa4rHKb9gqq8VeIZ81

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[Juan Salvo]

Pepijn is right with the diagnosis of the problem.

However, the correct way to do this conversion, would be to apply 709-xyz lut and render tiff as RGB.

The conversion itself is fairly standardized, but it’s critical to have a properly calibrated 709 monitor. If you don’t have that, there is no telling what will come out.

What’s more, you’ve still got the issue of the exhibiters calibration to contend with. Though I think theater owners tend to be pretty good about that.

Colorist | Online Editor | Post Super | VFX Artist | BD Author

https://JuanSalvo.com

[Pepijn Klijs]

[Juan Salvo] “Pepin is right with the diagnosis of the problem.

However, the correct way to do this conversion, would be to apply 709-xyz lut and render tiff as RGB.”

Totally right there Juan, sorry for the confusion, I forgot about that. I actually wonder why that output to XYZ TIFF option is in Resolve, as it seems to be unsuitable for any kind of use. You have a clue Juan?

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl

[Juan Salvo]

Yes. It’s perfect when you’re working in P3.

Colorist | Online Editor | Post Super | VFX Artist | BD Author

https://JuanSalvo.com

[Pepijn Klijs]

Really? Never knew… Thanks for clarifying that!

Editor/Colorist, Amsterdam, The Netherlands
http://www.pepijnklijs.nl

[Prathvish Hegde]

thanks jaun and pepijn.

will try that thankyou guys

prathvish hegde
colorist
(DaVinci Resolve and 2Kplus)

https://www.youtube.com/playlist?list=PLRPJQ3fIEoojI3JMa4rHKb9gqq8VeIZ81

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[Chris Martin]

We don’t get a proper transform using the Resolve preinstalled 709toXYZ LUT on projects that have been graded to 709 SMPTE Head Range (64-940) viewing environment. My guess is that the Resolve 709toXYZ LUT is not accounting for making color decisions at Head Range.

Chris

[Juan Salvo]

Internally resolve is always operating in Full 0-1023 range. So if you’re grading internally with headroom (60-940) then yeah, nothing will behave appropriately.

Colorist | Online Editor | Post Super | VFX Artist | BD Author

https://JuanSalvo.com

[Chris Martin]

Working full range internally but grading sdi out to head range. Since Resolve’s lut is based on full range it can’t do a proper transform of decisions made in in 64-940.