If you have an MP3/MP4 player that supports AMV video playback, then you will need the AMV Converter to convert videos to AMV file so it will be playable on your player. This version can now encode .AMV files at 128X128 resolution as well. The Video to AMV Converter supports the converting of the following video file formats: AVI, asf, wmv, MPEG1, rm, mov, vob.