Hello,

Please refer to this document.

Best regards,

thank you

Hi,

If I make the composition to a external keyer, there is a way to aximmetry generates the garbage matte?

Hi,

You can create a garbage matte (mask) in Aximmetry and put it out on an SDI port to BMD Ultimatte. Just create a matte image, import it in an Image module, and put it out on a corresponding output.

If you want to use the composite's garbage matte of a camera compound, then you might need to open the camera compound to get the garbage matte. We can help you with this, but we will need a better description of your situation, like which camera compound you use and what you want to send the external keyer.

Here you can find some additional information on this topic.
https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/green-screen-production/using-aximmetry-with-an-external-keyer/  

Best regards