AVI has been around a long time, and there's a lot of video saved in the format. Some devices, including mobile devices, have limited media file compatibility and won't play AVIs. For many users, the simplest solution is to convert the AVI files to MP4 files. AVI to MP4 Converter from A Software Plus is a free utility that can do the job with a minimum of fuss. It converts AVI and similar formats like DivX and Xvid, singly or in batches. We tried it in Windows 7 Home Premium SP1.
AVI to MP4 Converter's user interface is so minimalist that it's not so much spartan as zen, so to speak, and agreeably so. It's little more than a plain rectangular dialog box nearly filled by a main window displaying a file list, plus a handful of simple controls around the edges. For example, the Add and Remove buttons simply bear plus and minus signs, with no labels; the output destination field's browse button isn't labeled, either. But any user should be able to catch on quickly due to a very good graphical layout. Aside from a button linking to the developer's Web site, only two buttons remain: One for selecting the output quality, including Custom settings, and the Convert button.
We added some AVIs from our video library, but before we clicked Convert, we selected the Custom Settings, which included both audio and video bit rate options, frame rate, frame size, aspect ratio, and Crop and Pad size in pixels. The easiest option is the program's default choice, Same Quality, so we chose that and pressed Convert. An animated green bar showed us that the program was processing our file, but the display doesn't track the job's progress, nor is there a counter or timer. But AVI to MP3 Converter worked quickly and displayed a notification when the job was done. Our converted files played normally and with no discernible difference in quality.
AVI to MP4 Converter has no Help file beyond its Web page, though it hardly seems to need one. This simple tool simply does its job. We like that.