Meeting Zoom

Meetings by Skype often connect rooms full of people, each appearing as a tiny dot within the video from a wide-angle camera. It should be possible to use cross-correlation of signals from two separated stereo microphones to automatically zoom the image to a specific region, enlarging the person who is currently talking to fill the screen. You should implement your solution as a replacement camera that outputs a modified video stream, to a standard conferencing application such as Ring for Linux.