It has preset encoder settings for all the iDevices

It has preset encoder settings for all the iDevices. Load any video format into Prism, choose Mp4 from the output formats and then choose Encoder Options and from the MPEG4 drop down list you can choose the convert flv to mp4 different portable devices (the presets include the correct screen size, frame rate and more so you don't need to do anything more).Try nidesoft ipod video converter. I like using it and I think it can help you!It provides an easy and completed way to convert iPod video, iPhone video from all popular video files. It can convert almost all kinds of Movie/Video format, such as MP4, MP4 AVC, H.264, WMV, MP3 , WMA, AAC.etc.