Since most FLV video files use MP3 audio, the best choice is to demux or extract MP3 from FLV to avoid recompression (and quality loss)

Free software that can demux / extract MP3 from FLV

• Replay Media Catcher (Windows) - free for extracting MP3s from FLV and for recording YouTube videos.
• FLV Extract (Freeware/Windows)
• Avidemux (Freeware/Windows)
• DSM Converter (from Media Player Classic) (Freeware/Windows)

How to extract MP3 from FLV for FREE with Replay Media Catcher (video tutorial)




Commercial software that can demux / extract MP3 from FLV

• Replay Converter

Related threads:

• Converting .FLV videos
• Record/Capture/Download flash videos from YouTube