Record brush strokes and audio and output to movie

[kurienp]

Hi Friends, is there an app which I can use on the iPad to record strokes (say, for math problem solving) record an audio narration along with it ... and output as a video? I know that brushes can output recorded strokes - but does not support audio. there are other apps that can record audio ... but do not allow output as a video. Any help is appreciated. Thanks