lin to log ?

[Chris Hall]

DaVinci comes with built in luts for log-lin lin-log conversions amongst others. Just create a new node, right click it, then select “LUT”, you’ll see options for 1D or 3D Luts. Apply this to all the lin clips that need to be converted to log.

Chris Hall
Colorist – Basher Films
Pasadena, CA

[Thibault Carterot]

Hi,
Thanks for the answer but I can’t find any lin to log lut in the list. There are a dozen of lut with strange names like asylum, tvtographics but none that seems to be lin to log. Do I have to find it elswhere ?

Thanks

Config : Mac Pro 2010, 12×2,4Ghz, 32Go Ram, 3xFX4000,GT120, Decklink 3D+, RED Rocket, system on Crucial SSD 250, RAID FC 8gb Lacie 24To, CYCLONE PCI expander, Resolve 7.1

[Thibault Carterot]

Hi,
Thanks for the answer but I can’t find any lin to log lut in the list. There are a dozen of lut with strange names like asylum, tvtographics but none that seems to be lin to log. Do I have to find it elswhere ?

Thanks

Config : Mac Pro 2010, 12×2,4Ghz, 32Go Ram, 3xFX4000,GT120, Decklink 3D+, RED Rocket, system on Crucial SSD 250, RAID FC 8gb Lacie 24To, CYCLONE PCI expander, Resolve 7.1

[Mikhail Puzyrev]

In comparison with Luts supplied with Lustre those from resolve look bad. I also couldn’t find simple loglin or linlog functions.

[Sascha Haber]

The LUT Generator for the ALEXA (and D-21) camera is online: https://www.arridigital.com/technical/luts
This web application can create lookup tables for preview or conversion of image data. The LUT files can be created in more than 20 different formats for a wide range of software and hardware systems.
The typical applications of the LUTs are in combination with Log C images.
– Preview of Log C images on set.
– Conversion of Log C images for dailies.
– Color correction of Log C images with a conversion LUT in the display path.
– Round trip conversion of Log C to linear data in VFX workflow.

What you want is to set it from Linear to Log C and you are in game 🙂

A slice of color…

DaVinci 7.1.2 OSX 10.6.7
MacPro 5.1 2x 2,4 24GB
RAID0 8TB eSata 6TB
GTX 285 / GT 120
Extreme 3D+ WAVE

http://www.saschahaber.com

[Mike Most]

Good suggestion.

I would add that for most material you’d want to do this with, it would most likely be starting out as video gamma, not linear. So “what Sascha said,” with the caveat that you should probably make it “Video” to LogC rather than Linear. You should also make sure you make it Extended Range (in and out), 1D (No Matrix), and then Force 3D Lut in the output section. Select DaVinci format, drop it into the Library->Application Support->Blackmagic Design->DaVinci Resolve->LUT-.Arri folder and you should be all set. When Resolve starts, it should create a dat_3dlut file from the .dat file for you. It will then be available in any node via the LUT pulldown, under 3D.

The Arri LUT builder is one of the great online resources and extremely valuable whether you’re using Arri cameras or not. Arri deserves a lot of thanks for creating it.

[Gabriele Turchi]

thibault what you mean when you sad that in V8 this would not be a problem ?

thanks

g

[Thibault Carterot]

I’ll use multitrack on v8.

track 1 : Log materials with log to lin lut

track 2 : linear materials with no lut

BM correct me if I’m wrong ?

Config : Mac Pro 2010, 12×2,4Ghz, 32Go Ram, 3xFX4000,GT120, Decklink 3D+, RED Rocket, system on Crucial SSD 250, RAID FC 8gb Lacie 24To, CYCLONE PCI expander, Resolve 7.1

[Sascha Haber]

I know the six slots for loading in LUTs in v7, but what makes you think you would have that for each track ?
On the other hand, a “Load Lut” node would be awesome.
Like the “Load mask” node.
Or maybe just some predefined curve settings that would do the job.

A slice of color…

DaVinci 7.1.2 OSX 10.6.7
MacPro 5.1 2x 2,4 24GB
RAID0 8TB eSata 6TB
GTX 285 / GT 120
Extreme 3D+ WAVE

http://www.saschahaber.com

[Sascha Haber]

See, that the speed I like new features to appear 😉
Thanks Warren, still learning..

A slice of color…

DaVinci 7.1.2 OSX 10.6.7
MacPro 5.1 2x 2,4 24GB
RAID0 8TB eSata 6TB
GTX 285 / GT 120
Extreme 3D+ WAVE

http://www.saschahaber.com