incorrect luminance levels introduced in v15.2
In 15.0 and 15.1, 422-10-bit footage from the Canon EOS R6 appears to be correct. Superwhites at 110 IRE, and black between 0 and 10 IRE.
Now in 15.2, the levels seem wrong. White is clipping at 100 IRE rather than 110, and the black level seems elevated above 10 IRE.
Robert Drummond commented
I don't believe it is clamping the signal, at least in my experience. I believe it is "legalizing" from 0 to 110 IRE to 0 to 100 (black level is raised too).
A Pate commented
Having a similar experience, even with most recent upgrade to 15.4.1. For me, Lumetri is clipping everything at 100 IRE, and stops the y-axis of the graph at 100 IRE. In previous builds, with the same footage, the graph goes to 110 and I retain detail from the footage in the range from 100 to 110, which I am able to "recover" in color correction.
This issue is essentially clamping the footage destructively, with no apparent way to access/recover those lost details in the Premiere color correction workflow.
Has anyone found a solution or explanation to this yet?