How do I switch cameras?

[chengkiang]

If I have multiple webcams/video inputs, how do I specify which one to use? Right now, it defaults to the first one found.

[pdivita]

I had the same problem.
Fixed adding a function to my local copy of webcam-easy.js
Added this function:

set selectedDeviceId(value) {
    this._selectedDeviceId = value;
}

I call that function with the new id:

webcam.selectedDeviceId = otherWebcamDeviceId;
webcam.start();

Don't know if this is the cleanest solution (because the original variable was private probably for one reason) but works for me.