Invert effect masks for a clip in Final Cut Pro 10.4.6
In most cases, you use the built-in masking capability of a video effect, including a color correction, to limit the effect to a specific area or color. However, you can also invert your mask to exclude a specific area or color from the effect.
Add a clip to your project and select it in the timeline.
Position the playhead in the timeline so that your clip appears in the viewer.
If the Video inspector isn’t already shown, do one of the following:
Choose Window > Show in Workspace > Inspector (or press Command-4).
Click the Inspector button on the right side of the toolbar.
![The Inspector button in the toolbar]()
Click the Video button at the top of the inspector.
![The Video button]()
Add an effect to the timeline clip from the Effects browser.
![The viewer on the left showing a clip with a video effect applied, and the Video inspector open on the right]()
Apply a shape mask or a color mask to the effect.
To make the mask alpha channel visible, click View Masks (next to the effect name).
The mask’s alpha channel appears in the viewer. White indicates fully opaque mask areas, black indicates areas outside the mask, and levels of gray indicate transparent mask areas.
![The viewer on the left showing the mask alpha channel, and the Video inspector open on the right]()
In the Effects section of the Video inspector, move the pointer over the effect name, click the Apply Effect Masks button
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, and choose Invert Masks from the menu that appears.All mask selections for the effect are inverted (the masked and unmasked areas are reversed).
![The viewer on the left showing an inverted mask alpha channel, and the Video inspector on the right showing the Apply Effect Masks button]()
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* Nguồn: Final Cut Pro
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