User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36 Steps to reproduce: - Notice the attached file, exper.html, which provides a simple interface for controlling video playback. It allows playing, pausing, playback rate changes, and the ability to add an audio analyser node. - Grab any old video (I've tried with webm and m4v videos, specifically Big Buck Bunny) and edit the src attribute of the video element in exper.html - Open exper.html in Firefox 44 (I'm using 44.0.2 in Ubuntu 14.04). - Click the 'Play' button to start video playback - Change the playbackRate with any of the three buttons labelled '5x', '2x', or '1x' - When '5x' or '2x' have been selected (ie the video is playing at 5 or 2 times the normal rate), click the 'Add AudioAnalyser' button - Notice how the playback rate is reduced to normal playback speed (1x) and may appear choppy if a high playbackRate is selected. I feel that I should be able to use the WebAPI on a video without playbackRate issues. I have tried this in Chrome and it works as I expect (seemingly without change to the speed the video plays at). Actual results: Video playback slows down to approximately 1x rate and can seem choppy when the playbackRate is set high (for example: 5x) Expected results: Video playback should be running at the rate specified (5x, 2x, or 1x).

Karl - who should look at this?