BestEcho MP3 Converter is a powerful mp3 Encoder to Convert any Video or Audio into mp3 formats. It can convert almost all Aideo formats, e.g.WAV, WMA, RA, WMV, MPG, MPEG, MP3,MP4, M4V, RA,RM, RMVB, MOV, ASX, WMA, VCD, VOB to MP3 formats. You can create mp3 files with custom Audio quality, sample rate, size, duration and quality.