Finished VideoRecorderAWTStub, for the most part. We will just have to deal
with issues of the first few frames potentially being blank. This is the
nature of video capture. We should not block because that will likely cause
deadlocks. Also the audio needs to be in sync with video frames, from the very
beginning. I think a good solution is to remove blank frames post-production,
assuming that no audio is chopped with those frames.
