Jump to content




Photo

Resolve: Workflow for 10 bit log DPX film scan to rec709?


  • Please log in to reply
2 replies to this topic

#1 Marc Roessler

Marc Roessler
  • Basic Members
  • PipPipPipPip
  • 263 posts
  • Other

Posted 22 August 2014 - 04:50 PM

Hi guys,

 

I'm currently struggling with Resolve Lite.. my input is 10 bit log DPX from a 16mm film scan. The film has been over-exposed 1 stop (old stock, EXR100) to compensate for elevated base fog. I want to go to rec709 using Resolve.. but the results I get from Resolve look unbelievably ugly.

 

For comparison, I opened the DPX sequence using an old version of Pomfort Silverstack (that was still tailored towards DPX), using the Silverstack integrated Log-Lin 1.8 Gamma LUT. I use the R/G/B settings to "print the neg down" again to normal exposure. It looks very nice (see attached image).

 

Now I'm trying to pipe this through Resolve.. no matter what I do, the image always looks harsh and very un-organic (see attached image.. strange colors, apparent grain, strange highlight handling). It almost looks like a partly ENR'ed (bleach bypass) print! I tried using several different LUTs (the integrated ones as well as the print LUTs  LC3DL_Kodak2383_log2hd_*.cube LUTS available here http://cbkmrks.blogs...solve-film.html ..). I tried go get better results by spending lots of time grading the material, but I get nowhere near what I get from Silverstack out of the box (plus R/G/B adjustment), as you can see from the attached image. Unfortunately, their LUTs are not known.

 

How do you other guys approach this?

 

Kind regards,

 Marc

Attached Images

  • DPX_lut_trouble.jpg

Edited by Marc Roessler, 22 August 2014 - 04:51 PM.

  • 0




#2 JD Burditt

JD Burditt
  • Basic Members
  • PipPip
  • 18 posts
  • Other
  • Topanga, CA

Posted 22 October 2014 - 01:19 PM

Marc,
I know this is from a long while ago, I ended up stumbling upon this.
Here is my guess as to what is happening here. It all boils down to interpretation.
No matter if its resolve, nuke or AE, with a dpx, it first needs to be interpreted with the right dpx settings before applying any LUT, for rec709 and sRGB you shouldn’t have to apply any LUT unless you have a certain look you are going for outside of what was scanned to dpx. It should be interpreted with proper dpx curve to a rec709 or sRGB workflow. If you intended it for web or broadcast output.

 

-JD 


  • 0

#3 Anthony Raffaele

Anthony Raffaele

    New

  • Basic Members
  • Pip
  • 4 posts
  • Colorist
  • Technicolor New York

Posted 06 November 2014 - 08:23 AM

Have you tried coloring without the lut?
  • 0


Tai Audio

Media Blackout - Custom Cables and AKS

Zylight

The Slider

CineTape

Ritter Battery

Broadcast Solutions Inc

Abel Cine

Pro 8mm

Rig Wheels Passport

Willys Widgets

rebotnix Technologies

Aerial Filmworks

CineLab

Glidecam

Paralinx LLC

Visual Products

Technodolly

The Slider

Media Blackout - Custom Cables and AKS

CineTape

Tai Audio

Ritter Battery

rebotnix Technologies

Visual Products

CineLab

Paralinx LLC

Technodolly

Glidecam

Abel Cine

Broadcast Solutions Inc

Zylight

Pro 8mm

Rig Wheels Passport

Willys Widgets

Aerial Filmworks