I am wondering what frame size to keep when converting videos for watching on my iPod touch 4G. I usually use Any Video Converter and not iTunes. For transferring the file i use iFunbox, instead of iTunes. It seems the screen resolution for this iPod is 960x640, but a video with that frame size shows up with black borders on the top and bottom. Double tapping on the screen does nothing. I would not mind the video stretching a bit to make it show up fullscreen. I saw that some iTunes U videos had a resolution 320x240 and they show with black borders on the left and right of the video. I converted one of those video to have a resolution of 480x320 and that showed up fullscreen, but then i used the same resolution for a movie, but it still showed black bars on top and bottom. Does the ability to view fullscreen also depend on the original resolution of the video, from which I am converting to 480x320 or any other frame size ? Is there any video player app, which can adjust the aspect ratio of videos to fill up the screen ? Stretching is ok, cropping is not, IMO. Any suggestions would be appreciated ! Thanks.