I'm looking for an automagical way to create a Google Hangouts effect, ie. 1. I have a number of files that are recordings of individual conversation members. 2. I want to put together the video tracks into one project, and mask each one when the corresponding audio is silent (below some threshold), and to make it visible when there is audio from that audio track (so basically how Skype/Hangouts looks -> someone is talking, you see their webcam)
I haven't been able to find something like this using Google, or poking around in Premiere and Lightworks, but if it's available in another program, that would be great to know.
The mask doesn't need any motion tracking - either the entire screen is entirely transparent (audio), or entirely opaque (no audio).
Is there any way to do this automatically, or is it something that has to be manually put together?