.cine file processing

Hi,

We would like to convert the content of a raw .cine file to a sequence of exr frames (linear sRGB). We have tried 2 approaches so far:

a. PCC

Using the Phantom camera native software called PCC, batch converting .cine to .exr. This performs the debayering and white balancing (R and B gains), saving the sequence of exr frames in the ACES gamut. Applying a ACES to sRGB color conversion matrix (given a chosen chromatic adaptation method) gets us to one solution.

b. Resolve

Going through Resolve, inserting the .cine clip in the timeline, using the "Cine Default" in the "Camera Raw" settings, then saving the sequence of exr frames using a "Saver" node in fusion. That gets us to a second set of exr frames, directly encoded in rec709 gamut (I think).

Problem: the PCC (a) and Resolve (b) sets look radically different. The Resolve set looks more pleasing to the eye, BUT a captured ColorChecker's 4th row (row of grays) does not preserve linearity when probed, as if Resolve applies some kind of gamma or tone curve on the .cine file content.

Question: How does Resolve process raw .cine files before any user tweaks? What debayering/color balancing is performed exactly? We like Resolve's output better, but we care about linearity most of all. Are there technical docs explaining the processing?

Thank you,
Olivier

files .cine from phantom flex vri is not getting correct white balance/tint info. This is achieved on the pcc matrix of the file, wich is not been read by davinci resolve. It will be great if pcc matrix inside .cine file could be enable to see what WB or was used by the dp in the set. And not just getting factory default.

Regards