Open-colorIO

Do you have questions about Desktop Video, Converters, Routers and Monitoring?
  • Author
  • Message
Offline

Craig Campbell

  • Posts: 2
  • Joined: Wed Aug 22, 2012 6:34 am
  • Location: Manchester, Uk

Open-colorIO

PostSat Aug 25, 2012 11:25 am

Hello, first post here, are there any plans to incorporate Open-colorIO in Resolve 9 when it comes out of Beta at all? Thanks
Offline
User avatar

Dan Moran

  • Posts: 16
  • Joined: Wed Aug 22, 2012 8:09 am
  • Location: London

Re: Open-colorIO

PostSat Aug 25, 2012 3:39 pm

"OCIO is compatible with the Academy Color Encoding Specification (ACES)"

If it's ACES compliant then it should already be in there?
Dan Moran
Colourist
Smoke & Mirrors: London
www.smoke-mirrors.com
www.danmorancolor.com
Offline

Alex

  • Posts: 9
  • Joined: Fri Aug 24, 2012 10:18 am

Re: Open-colorIO

PostSun Aug 26, 2012 10:30 pm

No, OCIO is an open source framework for configuring and applying colour transformations, its used in the reference implementation of ACES, but is by no means necessary..

The LUT compatibility stuff in OCIO would be neat to have, but a little but redundant as Resolve is already pretty good in that department.
Being able to configure Resolve using an OCIO config file might be handy, but that's really designed for rolling out complex colour pipeline decisions to lots of people who might not individually understand what's going on (ie: not colourists).

What could be cool on the other hand would be allowing Resolve to generate a complex sequence/shots specific OCIO configs. Allowing resolve to take a sequence from a film, generate per shot 3D luts and associate them with specific shots (via the config) so that other people using Nuke or Rv can see their shots through the current grade in dailies and on their desktops.
(you would need a lot of very granular control over exactly how this OCIO config was written to avoid creating a big mess though)

More than OCIO I'd like to see CTL (Color Transformation Language) implemented in Resolve. Whilst OCIO is used to load and apply luts in the ACES reference implementation, CTL is what's used to actually define what they do.
Allowing Resolve to accept CTL directly would allow you to "write" your colour transformations programatically rather than just adjusting knobs..

[edited for terrible spelling]
Offline

fredsavoir

  • Posts: 17
  • Joined: Wed Aug 22, 2012 4:02 pm

Re: Open-colorIO

PostMon Aug 27, 2012 2:10 pm

Hi,

It's really important to have good pipeline between grading and VFX House... It's will more than awesome.

Hope Blackmagic is listening :)

Fred
Offline

Andrew Hunter

  • Posts: 202
  • Joined: Wed Aug 22, 2012 2:30 pm
  • Location: Toronto, Canada

OpenColorIO support

PostWed Aug 29, 2012 3:36 pm

Hey BMD,

I was wondering what your thoughts about supporting OpenColorIO for lut handling is?
Offline

Alex

  • Posts: 9
  • Joined: Fri Aug 24, 2012 10:18 am

Re: OpenColorIO support

PostThu Aug 30, 2012 12:32 am

Would be great to merge this with this existing thread:
viewtopic.php?f=3&t=242
Offline
User avatar

Joshua Helling

Blackmagic Design

  • Posts: 853
  • Joined: Wed Aug 22, 2012 4:58 pm

Re: OpenColorIO support

PostFri Aug 31, 2012 9:24 pm

Alex wrote:Would be great to merge this with this existing thread:
viewtopic.php?f=3&t=242


Done! Thanks.
Joshua Helling

Director of World Wide Support
Blackmagic Design Inc.
Offline
User avatar

Eugenia Loli

  • Posts: 157
  • Joined: Mon May 04, 2015 6:47 am
  • Location: Spokane, WA, USA

Re: Open-colorIO

PostTue Feb 28, 2017 8:14 am

Any chance that this is getting implemented? You see, any EXR files imported from Blender3D (files rendered using the new "Filmic Blender" colorspace setting which expands Blender's dynamic range from 5 f-stops to 25), do not work properly on Davinci Resolve or your compositor. Filmic Blender uses OpenColorIO as its LUT engine: http://opencolorio.org/ and word is that it's going to become the default on the new Blender version that comes out in May. If that's true, then that means that all renders imported on your products won't have the expanded DR, and they will just look wrong. :(
Collage artist, illustrator, filmmaker: https://vimeo.com/eugenia
Offline

Ingmar Rieger

  • Posts: 60
  • Joined: Sun Nov 25, 2012 2:24 am

Re: Open-colorIO

PostThu Mar 02, 2017 11:30 pm

Eugenia Loli wrote:Any chance that this is getting implemented? You see, any EXR files imported from Blender3D (files rendered using the new "Filmic Blender" colorspace setting which expands Blender's dynamic range from 5 f-stops to 25), do not work properly on Davinci Resolve or your compositor. Filmic Blender uses OpenColorIO as its LUT engine: http://opencolorio.org/ and word is that it's going to become the default on the new Blender version that comes out in May. If that's true, then that means that all renders imported on your products won't have the expanded DR, and they will just look wrong. :(

While OpenColorIO is nice in one way it sucks in others. For example nearly anything has to be delivered as a Look Up table. Haven't seen math besides some lg2/lg10 predefined function in OpenColorIO. But you could easily add your own transforms to Resolve as DCTLs to handle anything - if you are unhappy with RCM/ACES which can do a lot. An open color management with a lot more settings and a way to add individual color spaces and gamma curve formulas of course would be nice too ;-)

While some of the color management in Resolve is a bit cumbersome, you can already use EXR files but you have to know how to handle the extended dynamic range. Problem with Blender is that as far as I understand it despite the color management saving to EXR means it's always saving Linear sRGB. So no direct way to ACES for example as no individual IDTs are supported. But there are a few solutions around it. (For example http://acescentral.com/t/adding-idts-to-resolve/161. Haven't tried it but according to this you can put a DCTL with sRGB -> ACES-AP0 into your LUT folder, select it as an Input LUT and select No IDT for ACES and you can use the file in an ACES workflow)

I use some custom tools where I can easily pass Linear sRGB through the ACES chain in Resolve and it looks good. You just have to use the tools to handle the scene linear data corretly.

Feel free to ask me more if you don't find a way. Could post some more on the weekend maybe, for now it's too late and I have to sign out for today.
Greetings
Ingmar Rieger
Offline

JosephSlomka

  • Posts: 75
  • Joined: Fri Sep 20, 2013 9:23 pm
  • Location: Burbank

Re: Open-colorIO

PostFri Mar 10, 2017 12:07 am

While it would be great to see open color IO or something like it implemented into resolve it seems unlikely.
They whole point of OCIO was to create a a platform independent color transformation. If you use Nuke, Maya,Flame or ... the exact same math,configuration and luts can be applied.

So in an ideal world, you can work between Maya, Fusion and resolve with a single configuration file and be confident that color is not changing.

The reality is that on one show there will be DCTL,CTL, GL fragments,Cg code, ICC, and a combination of under the hood color management and luts. Every platform and engine will be custom requiring diligence for each software update and look update. Each managed externally and without overriding organizational and QC tools. Every time an image passes hands is a new opportunity for a one off bug to appear.

Return to Post Production

Who is online

Users browsing this forum: No registered users and 8 guests