Mixed Reality Capture with Browser based application

Hello,

I am working on an application based on BabylonJS which is a browser based 3D engine. There are a variety of of examples of using babylonjs for virtual reality applications, such as: https://playground.babylonjs.com/#F41V6N#32

I am wondering whether it is possible to make a Mixed Reality Capture of such an application. I know that an application has to explicitely support MRC, however, in my case, the application would actually be the browser, so I was wondering: Is there a browser API to access the additional cameras etc. So far, I have only found one reference of a project, but it looks like this person does basically everything on his own and is not using any of the provided infrastructure: https://github.com/fabio914/reality-mixer-js

Any ideas?

Best regards,

Axel