Unfortunately these things are all over the place. The various players all tend to do something different. So QT7 reacts differently than QTX. Even the same version under different OS versions is different. I just moved some submaster files that were created as DNxHD in Premiere Pro on a PC to Premiere Pro on a Mac and levels look completely wrong - more contrast and saturation.
As a general rule, ProRes uses 601/709 video levels - "studio swing".
It's generally my understanding that in all of this, the levels aren't actually scaled, merely how the information is tagged. Naturally then levels will be squeezed or stretched by the importing player/editing application if it gets it wrong.
Your only reliable solution is to do some testing and set up a path and set of guidelines and applications that you will always use (until it changes again).
- Oliver
> That matches my recent experience. Even with QT Ref into AME I had to switch to RGB. To me given it's a QT Ref linked to what is 601/709 Avid media there is some metadata voodoo that make AME rescale to full range under the hood to make proper level .movs.
>
> This brings me back to a question I've asked before and don't recall if there was a definite answer. When I export a QT Ref from DNX media and use QT Pro to make ProResHQ self contained I end up with a ProResHQ QT that when ama'd back into Avid shows proper video levels. Does this mean the ProResHQ video essence is still 16-235 like the Avid DNX media or does QT Pro Scale up to RGB level in the process of making a self contained .mov?
Posted by: Oliver Peters <oliverpeters@oliverpeters.com>
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