Video to Audio Converter Factory Pro is a professional and powerful program. The Video to Audio Converter Pro can easily get MP3, WMA, WAV, M4A, AAC, AC3, OGG, MKA, AU,etc. audio from video AVI, MPEG, WMV, MP4, MPEG-4 AVC, RM, MOV, etc.The video to audio converter supports batch conversion, thus you can process multi-conversion at the same time and set many output audio formats for one video to convert.