O.K. just wanted to collect some information for those that are backing up to there iTouch/iPhone. I think it does not matter because they seem to share the same screen. In the conversion process I want to make the file size as small as possible, but not to the point that one gives up video/audio quality for it. I also wish to maintain as close as possible to the original aspect ratio of the movie.
The iTouch/iPhone seems to have a screen size of 480 X 320 (1.5:1 aspect ratio), however it says it is capable of displaying resolutions up to 640 X 480(1.33:1). The typical big screen movies comes in either 2.35:1 or 1.85:1 aspect ratio. Yes, there are other ratios out there, but these seem to be the typical for US film makers. To keep things simple and not to get of on a tangent I wish for now to keep this thread related to the 2.35:1 aspect ratio movies converted to the iTouch/iPphone.
For 2.35:1 movie that is enhanced for 16:9 or anamorphic, the frame resolutions I have been looking at are 640 X 272(2.352) or 480 X 208(2.307). Both of these keep the aspect ratio very close to the original however with the iTouch/iPhone screen size limited to 480 X 320. So am I just wasting file size in converting things to the 640 X 272 resolution or do you think the difference in the two frame resolution will be visible on the iTouch/iPhone screen?