Create a new library and project, and import the green-screen clip and the background clip into the new project. Then, adjust the HUE vs. LUMA curve that's part of the Hue/Saturation Curves effect and apply the Keyer effect. You can save the entire effect as a preset to use with other chroma key clips in this or any other Final Cut Pro project.
Create a new library and project
- Create a new Final Cut Pro library.
- In the Libraries sidebar, select the new library, then set the Library color processing setting to Wide Gamut HDR:
- Choose File > Library Properties (or press Control-Command-J).
- Click the Inspector button on the right side of the toolbar.
- Click Modify at the top of the Library Properties inspector, then choose Wide Gamut HDR.
- Import the HDR green-screen clip and the background clip into the new library.
- Create a new project and set the color space to match your original material. For content captured with an iPhone 12, choose Wide Gamut HDR - Rec. 2020 HLG. For content captured with other cameras, use Wide Gamut HDR - Rec. 2020 PQ.
- Add the background clip into the primary storyline.
- Add your green-screen clip above the background clip by connecting the green-screen clip to the primary storyline.
Adjust the Hue/Saturation
- In the Video Inspector, click the Color Inspector button.
- Click the pop-up menu at the top of the Color Inspector, then choose Hue/Saturation Curves from the Add Correction section of the menu.
- Under HUE vs. LUMA, click the eyedropper tool and select the color in your image that you want to key out. This creates three control points on the curve.
- Choose View > Show in Viewer > Video Scopes.
- Click the Video Scopes settings button , then choose Waveform and Luminance (or Luma if you're working in HLG).
- Adjust the luminance of your key color:
- For Rec. 2020 HLG formats, including video captured with iPhone 12, use the middle control point you set in the HUE vs. LUMA section of the Hue/Saturation Curves and reduce the luminance of your color key to a maximum of 50%.
- If you are working in Rec. 2020 PQ, use the middle control point and reduce the luminance to a maximum of 100 nits.
Apply the Keyer effect
- In the Effects browser, drag the Keyer effect to the green-screen clip.
- To make fine adjustments to the Keyer effect, open the Video inspector to access controls for the Keyer effect.
- To save this combination of effects to use on other clips you need to chroma key, click Save Effects Preset, set options, then click Save. Learn more about saving effects presets.