I need help converting an HD video file to be able to play on my ipod: H264 1280 x 540, AAC 5.1 Audio in an mp4 package. I've tried handbrake and I get a great video file, but no audio. I can play it in iTunes but when I the built in converter for the ipod, all I get is a white screen for the length of the video with good sound. I think the problem is the 5.1 audio but I'm not sure. Any suggestions? I want to keep an HD file for watching on the tv in the future and a sd file for playing on my ipod touch while away.