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The idea behind the HDR10+ workflow is that you’ll grade the HDR version of each clip in your program first, and then use the automatic analysis to create a downconverted tone mapped version of each shot that’s controlled by metadata. Once the HDR10+ trim pass is complete, you’ll deliver the rendered HDR output along with a set of HDR10+ JSON metadata files to a facility for final mastering.
Simultaneous Master and Target Display Output for HDR10+
When mastering HDR and trimming versions for more limited displays, it’s extremely useful to be able to evaluate your HDR grade and tone mapped trim pass side by side. Starting in DaVinci Resolve 15, it’s possible to output both the Master Display output and the Target Display output simultaneously when you’re grading with either Dolby Vision or HDR10+ enabled.
Necessary Hardware
To work in this manner, you must have the following equipment:
— Your DaVinci Resolve grading workstation must output via a DeckLink 8K, DeckLink 4K Extreme 12G, UltraStudio 4K Extreme video interface, or better.
— Your Mastering Display must be capable of HDR nit levels suitable for the deliverable you’re required to produce.
— An HDR target display that can be set to the appropriate tone mapped output.
Enabling Simultaneous Monitoring
When you set up your display hardware, the HDR Master Display must be connected to output A, and the Target Display must be connected to output B of whichever BMD video output device you’re using. Then, you need to turn on the “Use dual outputs on SDI” checkbox in the Master Settings of the Project Settings. At this point, assuming all of your connections are compatible with one another, you should see an HDR image output to your HDR display and a trimmed image output to your
SDR display.
HDR10+ Auto Analysis Commands
After you’ve graded an HDR version of each clip in your program, a set of HDR10+ specific commands let you auto-analyze each clip to create custom HDR to SDR downconversion metadata that give you a starting point for the SDR trim pass you need to do. These commands are available in the Color > HDR10+ submenu:
— Analyze All Shots: Automatically analyzes each clip in the Timeline and stores the results individually.
— Analyze Selected Shot(s): Only analyzes selected shots in the Timeline.
— Analyze Selected and Blend: Analyzed multiple selected shots and averages the result, which is saved to each clip. Useful to save time when analyzing multiple clips that have identical content.
— Analyze Current Frame: A fast way to analyze clips where a single frame is representative of the entire shot.