Final Cut Pro Keyer not working with green screen

Apparently, FCP picked the blue from your shirt to key out, instead of the green wall.

You can, however, fix that, easily:

Drag the Strength slider to zero.

Click the Sample Color button, and the click and drag on a green area of your clip.

Hi(bonjour),

You have to select the color to be keyed in the inspector tab for the keyer filter. Click in the left icon to chose the Sample Color and get the sampler tool and click in the viewer to set this color.

Michel

Start over, as described, and tell us how it goes, step by step (with screenshots if possible).

1) Delete the existing Keyer effect

2) Drag the effect to your clip again. Presumably, the wrong color (i.e. the shirt) is keyed out, right?

3) Drag the Strength slider to zero. You should see the clip as if no Keyer had been applied. Is that what you are seeing?

4) Click the Sample Color button.

5) On the viewer, click and drag on a small area of the wall. What do you get?

Looks like you've got a small selection on your face. What does it look like if you delete that selection?

Here are instructions on using the keyer.

Use chroma keys in Final Cut Pro - Apple Support

Jump to sample 1 and set strength to 0% as Luis wrote. Or much simpler, reset the keyer filter and set just one sample to green.

Michel