-
Excess Luma issues DVCPRO HD
Hi Guys,
I’m getting confusing readings on the scopes when using the Luma check option in FCP 6.0.4.
I’ve started colour correction on my DVCPRO HD 50i sequence ingested from P2, and I have been checking for excess luma.
Looking at the scopes prior to checking luma, I see most of my images have some pixels above 100 (superwhite) so by using the 3 Way CC, I bring the white levels down to just under 100. I then do the Luma check. I get the green tick overlay on the canvas, but when I look at the Waveform Monitor, it has crushed the levels of my whites again by the same increment of which i reduced them in the 3 Way CC. I turn off the Excess Luma, and everything goes back to how it should be.
In addition, if I do no colour correction to a clip, and Ctrl Z the clip, I can see in the waveform monitor that it is crushing my superwhites to 100, even if i have yet to perform any corrections. I turn Excess Luma off, and my clips return to their original superwhite levels.
It seems to affect the whites in the same way the Broadcast Safe filter does (clamping them to 100 when no correction has been done, or clamping them more if correction has been done already), but only when I have excess luma turned on. If I don’t have it turned on, I don’t have a problem. But when I do have it turned on, my scopes bugger up and my image is visibly affected. Any suggestions? Is this a known bug or am I missing something obvious?
Cheers,
Simon -
1 Reply
-
Hi Simon,
I’m having the same issue, did you ever find a solution to this?Mike
Reply to this Discussion! Login or Sign Up