Client-Side Video Compression

I need a script written in Java or something that can be embedded on a webpage (nothing outside of the browser, there must be as little interaction as possible by the user so that they don't need to download and install anything directly) that allows a user to select a video on their hard drive and then the video is converted to an flv with the VP6 codec right in the user's browser on the user's computer. The converted video would then be uploaded to a particular folder on my server. Basically, this would allow for client-side video compression so the video is converted to an acceptable format before even reaching my servers so we don't need to spend money on conversion servers and can expand with our customers.