Free AVI to MP4 Converter for Windows
AVI to MP4 Converter is a freeware that lets you convert AVI video to MP4 video format file, supporting AVI, DivX, Xvid, WMA, MOV, H.264, MPEG1/MPEG2 video formats. As you can see from the screenshot below, there is no such complicated thing around in converting. There is no need to worry about encoders and decoders either. The video quality of the converted MP4 video file has the same quality as the quality of the source (AVI) as well as the height and width.
AVI to MP4 Converter works for Windows Vista, Windows XP, 2000, 2003 Server and Windows 98.