Hi, I am trying to see whether it is possible to play a 720p movie on the iphone 4 at full screen but have become a tad confused on the issue. I can play a 720p movie on the iphone 4 that is either letterboxed (black bars at the top or bottom) or cropped (zoomed in so that some of the picture is lost), but I was wondering whether it was possible to encode the movie so that it plays 720p in true fullscreen? I know the native resolution of the iphone 4 screen is 960x640, so when I downsized my movie file to this resolution, it did play properly in full screen, however, this is not 720p because 720p is 1280 x 720? When i therefore played a 1280x720 file, it letterboxed. Therefore my question is, what aspect ratio/resolution do I need my video file to be to play 720p video in proper full screen on the iphone 4 without cropping/letterboxing? Thanks for any help.