FLV To MP3 Converter - Version 3.0 FLV To MP3 Converter is a windows application that fast convert FLV To MP3 audio format. FLV To MP3 Converter also supports MP4, MPG, FLV, WMV, MOV and more video formats to MP3, WMA, WAV, OGG, and FLAC audio formats conversion. Also, FLV To MP3 Converter has the Batch Mode and converts handreds of flv files to MP3 audio at one time.