Avid to Resolve Color Issue - Data Loss
Hello editors,
Something is happening to my log footage and I cannot pinpoint the exact problem/solution.
I am editing a piece in Avid Media Composer with footage shot on Canon C500 MII in Canon Cinema Gamut/Canon Log 2.
After the footage was shot, it was copied to a drive, and then sent through a transcode process (Vantage, by Telestream) to put into Avid Interplay.
I exported some of the footage as an MXF from Avid to Resolve to start coloring.
When I put my usual color space transform(CST) and LUT nodes on the clips, the information loss was very obvious. I realized there was substantial crushing of the blacks and whites of the ingested footage, and the footage no longer looked flat log, but looked dark and saturated.
I also noticed in the meta data of the clips in resolve, it showed that the Input Color Space was "Rec.2020".
I theorized that somewhere during the Transcode/Interplay ingest process the color space meta data of the footage changed from "Canon Cinema Gamut/Canon Log 2" to "Rec.2020". Unsure if that was the culprit or not, but regardless we usually work with rec.709, not rec.2020.
I tested my theory by importing the original RAW clip files straight into Resolve. The Input Color Space was "Canon Cinema Gamut/Canon Log 2" and the LUT made the images look correct, with no information loss.
I thought I may have found my problem until I kept testing.
In a new Avid test project, I imported one of the original RAW clip files straight into Avid (without the transcode process) and then imported the same clip but of the Ingested files to compare them.
The only difference I can see looking at them in the project is when I go to their Source Settings > Color Encoding tabs. The RAW clip's source color space reads "[0-63 (10bits)]". The ingested clip's source color space reads "Rec.2020 [video levels]".
Another test I tried was I imported a RAW file into Avid, had it point me to the file it created after importing, put the file copy that Avid created into Resolve, and found that the footage still has information loss but resolve interprets the Input Color Space as "Canon Cinema Gamut/Canon Log 2".
I have tried multiple different color space settings in Avid with no progress in finding the problem.
The only thing that seems to make the Ignested footage look like the RAW log (and with what seems to be the same information but unsure) is when I apply the color transformation of "Level scaling (full range to video levels)" in the color encoding tab. I tried this and exported as an MXF and put it in Resolve (it doesnt work with AAF apparently). It looks almost identical to the RAW log footage except for an extremely small color shift and data loss.
I understand what that setting is hypothetically doing, but I cant say for certain its correcting the issue or not harming the image for color.
Any advice or guidance would be greatly appreciated as I have been trying to figure this out for some time now, and am starting to feel officially lost.
Disclaimer: This is a feature length project with a deadline and re-editing it would be the least ideal scenario.