When I use certain movies in my application, my handlers that I've set using MediaPlayer.setOnPlaying(), MediaPlayer.setOnStopped(), and MediaPlayer.setOnPaused() are not called. The movie files that don't notify are files that have been converted, using QuickTime, from a .mp4 containing an mpeg encoded video to a .mp4 containing an H.264 encoded video. An example of which is attached (pre and post conversion).