This page takes a peek into the future of Mumble's development. These features are what we would like to implement in future releases. There is no guarantee that we will ever get around implementing them however.
The current overlay texture system is designed for high speed texture transfers in a format that happens to be 60 pixels high. This is no coincidence.
Using H.264 encoding, 80x60 pixels is small enough that we can encode a 15fps video stream with minimal CPU impact. The bitrate will also be low (lower than existing audio streams), and with a bit of filtering the quality is near perfect. We really mean this; what filtering does for the audio quality in Mumble, it will also do for the video quality of the overlay.