I want to convert my MP4 video files to AVI. Had problems with converters that locked my previous converted AVI files to only work with the converter's player. Wasn't a true independent AVI that you could play in Windows Media Player. My MP4 files are on a Nokia E5 Smartphone but no app I know of from the OVI store. Willing to buy a good program that will give me native ("no strings attached") AVI files that I can play in WMP or other program.