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Known Participant
March 23, 2026
Question

Can’t Apply Mocha Pro Mask ML in After Effects

  • March 23, 2026
  • 0 replies
  • 57 views

Hi guys,

I’m looking for some advice from someone skilled in Mocha Pro. The last few days, I’ve been watching some tutorials about the ML Matte Assist. I select the area and let the AI shape the object to track. I see there’s a spline with points only on the first frame, but as I understand the ML mask is tracked in a different way, so I ignore this. After tracking, I go to the Matte section where the Generate Object Matte is already selected. I activate Refine Layer Matte, save the project, and exit Mocha.

Back in AE, I select Apply Matte and nothing happens. When I scroll through the timeline, it’s like my video is not responding at all, the frames don’t change. The video plays only if I turn off the Apply Matte option. If I click Create AE masks, it adds the spline points of that first frame only. It seems there’s a mask layer that has some keyframes, but nothing happens either way.

I did 2 screen recordings to demonstrate this, and I hope there’s someone here who can help and tell me I’m doing wrong:

https://drive.google.com/file/d/1GSPpyQQyX6ky17hXTg38Jrkw-XOmeRJo/view?usp=sharing

https://drive.google.com/file/d/1nyW28_ZsJvvW4n_H-E2SPYvPb21cD--4/view?usp=sharing