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Stebs Schinnerer

Arri Footage with Yellowing Inside Whites

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Hello there!

My name is Stebs and I'm new to these forums. Happy to be here, but not excited about my reason for joining. Hoping someone can shed some light on what's going on here...

I recently shot a bunch of footage on my Alexa Mini and about halfway through shooting I was reviewing footage and noticed there seems to be yellow banding inside of the lighter colors. This has nothing to do with florescent lighting, however it almost looks like that at times. It appears as though it's affected inside shaded areas/gradients. My hope is this is something that is only affected inside the Arri 709 LUT I'm editing in but really cant tell.

Here are a few still frames to show what I'm talking about:

https://drive.google.com/open?id=1NWN4B9Y2PLEgBn9LOtOH4xqolvqvA0HC (full frame)
https://drive.google.com/open?id=1Qd6slhaVx-y-WTckMfSCSuZywr7y_Zbi (200% zoom)
https://drive.google.com/open?id=16yVH4Flh_cx-7SetWo6KzWQDH6p74zuO (400% zoom)
https://drive.google.com/open?id=1FZUPfa4455hSO26PQxDGHLqwrw7mnhBX

Here are the specs I shot in:

  • ProRes 444
  • 3.2k
  • Arri RAW with Arri 709 LUT
  • Sigma FF Cine Lenses

Any thoughts would be greatly appreciated!

Cheers,
Stebs

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On 6/5/2019 at 10:46 AM, David Mullen ASC said:

You mean Log-C not Arriraw?

Hey thanks David and sorry for the delayed reply - been having trouble logging into my account.

Yes, I mean Log-C. Any thoughts?

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4 minutes ago, Bryan Fowler said:

Is this a screenshot from Premiere? Or is it a exported still?

 

It's a screenshot from Premiere.

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Try exporting a clip, or frame. Is it still there? Premiere does dumb stuff to the color and gamma. 

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10 minutes ago, Bryan Fowler said:

Try exporting a clip, or frame. Is it still there? Premiere does dumb stuff to the color and gamma. 

There is still yellowing inside the whites when I export, yes:

https://drive.google.com/open?id=1RXWN2wXB5iSpJk9eDby8vaHq20b9fmBE

However, the craziest thing was happening when setting the export settings... in the preview window in the export dialogue window the yellowing was there, but when I changed any setting (quality precent, image type, etc) the yellowing disappeared but then quickly came back. As though it was flickering on and off. I'm completely baffled.

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I'd try opening a clip in resolve, or FCPX or something else. see if it's a Premiere thing, or in the clip. (maybe you did that already)

But it's not something I remember seeing personally.

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Just now, Bryan Fowler said:

I'd try opening a clip in resolve, or FCPX or something else. see if it's a Premiere thing, or in the clip. (maybe you did that already)

But it's not something I remember seeing personally.

Will try that out, I just dont have any of those programs. Planning to send over to a friend to see what they can do with it in Resolve. Fingers crossed and thanks for the feedback!

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