I am mac user and using blackberry playbook, I was looking for an app which could convert my documentaries into HD movie to be played on my playbook, I have found an app at the apple app store, it can convert your dvd movies to be played on playbook, this app has a option to optimise the movies for the playbook. you can check their website iFunia DVD Ripper - App Store Version or you can look into at the apple app store for DvD Ripper.