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Problems with color depth in Speedgrade

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Raphael Ofner
Problems with color depth in Speedgrade
on Jul 7, 2016 at 7:51:03 pm

Hello everybody!

As said in the title I've got problems with the color depth in Adobe Speedgrade.
I want to color-correct the footage of my DJI drone using LUTs and of course the build-in tools from Speedgrade.
Unfortunately the usage of the LUTs makes the video look like there is not enough color-depth because you can see stripes in gradients (especially in the sky).
I hope you can see the problem in the following screenshot.
The stripes appear in the preview of Speedgrade as well as in the rendered video.
So what can i do to prevent this stripes?

Thank you in advance!

Greetings
Raphael



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Chris Wright
Re: Problems with color depth in Speedgrade
on Jul 8, 2016 at 1:17:24 am

whoa! that certainly doesn't look like 64 cube luts. looks like 8-16 luts.
Which luts did you use?
did you render out to a 8 bit codec? try dnxHR or prores instead.


I have actually made a premiere preset that can conform to any lut in 32bpc. It actually replaces the lut.
just change the input black and white.
https://f1.creativecow.net/9975/slog-3-to-rec709-effects-preset-for-premier...


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Raphael Ofner
Re: Problems with color depth in Speedgrade
on Jul 8, 2016 at 7:33:25 pm

Hello!

Thank you for your quick answer :)

I don't know if my LUTs are 64 or 8-16, how can I check that out?
The LUTs I use are from this website (unfortunately there are no detailed information about the LUTs on it) : https://sellfy.com/p/Ainy/

I already tried to render the video with different settings including DPX and Apple Prores, always with the same result :/

Sorry I don't clearly understand what you mean with "just change the input black and white".
Should i import the color-corrected video to Premiere and apply your Preset or what do you mean?

In the Screenshot below you can see the unedited original Footage of the drone (just for comparison):

The original Footage has a few compression artefacts, but it is was less noticeable than after applying the LUT.

Thank you in advance!

Greetings
Raphael


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