Check out Mozilla’s Robert O’Callahan MediaStream Processing demos:
https://ftp.mozilla.org/pub/mozilla.org/firefox/try-builds/rocallahan@mozilla.com-6ac1418daa2e/
You need Firefox experimental nightly build:
http://people.mozilla.org/~roc/stream-demos/
You should try them, it is worth spending some time playing around with these demos. Start at the top of the list, and work yourself down, one at the time.
Tags: experimental, Firefox, HTML5