Notice of Meeting - ACESlog VWG - December 6th, 2023

ACESlog VWG Meeting

Wednesday, December 6th, 2023
11:30am PDT Add to Calendar (.ics)

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NOTE: We will be using Zoom for this meeting.

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Topic: ACES Virtual Working Group Meetings
Time: This is a recurring meeting Meet anytime

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Meeting ID: 993 4048 4145
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Hi, is there no recording of this meeting?

Best regards


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Yes! Sorry, it was linked on the Dropbox homepage but link wasn’t put here. I’ll try to remember to do that for future meetings.

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Thanks Scott,

I found the link.

It’s a bit off topic, but on a still running project we got drone footage as ProRes RAW.
We don’t have a Baselight or Scratch available, so we converted the ProRes RAW files with Apple Compressor to D-Log with Rec.2020 primaries (this is the proposed default that is set automatically) as ProRes 4444 files.
Only now we were able to further process the footage in Resolve and later work with it in Nuke (ACES).

In Nuke we have seemingly clipped blacks with a ACES Rec.709 ODT, but in reality the darkest shadow pixels are all just filled with a lot of negative values.

I wonder if nowadays the default knob in the grade node in nuke to clamp at “zero” is the best choice if we may encounter more and more negative values from camera encodings.

In this case I am not really sure if something unwanted is happening in the Apple Compressor conversion step.