Yeah that's pretty much what I'm doing currently. Load the files in Nuke
and use the RRT for viewing. But I don't feel quite ready to use the
aces pipeline across the entire show just yet. We would have to produce
all the CG elements in aces and convert other sources material to aces
which is not always that easy. In addition, we are not the only vendor
on this show and we will have to share shots between vendors. I would
prefer to use a simpler pipeline.
The files come from Technicolor France.
On 09-May-13 18:24, Diogo Girondi wrote:
We are working on one right now, but we've got the original MXF files
from the camera.
What we did was to convert the RAW MXF files using using Sony's
RAWViewer to 4k OpenEXR Half-Float linear files with the ACES gamut.
We didn't use DaVinci or OCIO for the conversion because they both share
the same F65 IDT which still beta and a bit off if compared to the
results Sony's RAWViewer and Baselight are yielding.
In Nuke we use the ACES settings from OCIO just to make use of it's sRGB
RRT for monitoring.
Do you have any info on where and how these files you've got were processed?
cheers,
Diogo
On Thu, May 9, 2013 at 6:26 PM, Howard Jones <[email protected]
<mailto:[email protected]>> wrote:
The line in the manual
Y = Power(10.0, ((t - 0.616596 - 0.03) / 0.432699)) - 0.037584
matches exactly the builtin sLog LUT, but I guess you knew that ? -
I couldn't see an sLog2 curve.
Howard
------------------------------------------------------------------------
*From:* Lewis Saunders <[email protected]
<mailto:[email protected]>>
*To:* nuke-users <[email protected]
<mailto:[email protected]>>
*Sent:* Thursday, 9 May 2013, 21:52
*Subject:* [Nuke-users] Re: sLog2 and S-Gamut from F65 camera
Francois Lord wrote:
> Is there a way to convert from aces to normal sRGB for
> viewing, without using the RRT?
You could do ACES to XYZ with the matrix on page 13:
https://github.com/ampas/aces-dev/blob/master/docs/ACES_1.0.1.pdf?raw=true
...then XYZ to sRGB with a Colorspace node.
If anyone has the actual SLog2 or S-Gamut docs (with the formulas
legible!) I'd love to see... it might be possible to extrapolate from:
https://github.com/imageworks/OpenColorIO-Configs/tree/master/aces/luts/sony
http://pro.sony.com/bbsccms/assets/files/mkt/cinema/solutions/slog_manual.pdf
To be honest I'd beg for correct LUTs from the post people, or the
usual it-looks-different problems will surely errupt :)
--
Lewis Saunders
looks different
London
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