getPngStream data emitter only fired twice

When I call client.getPngStream().on('data', console.log); I only get two PNG's emitted each time I restart the client application. I've debugged far enough in to see that the underling video stream keeps emitting data but something is going wrong in the encoder and I haven't been able to figure it out yet.

Any ideas?
https://github.com/andythecoderman/airbot/blob/master/video.js