How to convert FLV to MP3 without losing any quality (demux/extract MP3 from FLV)

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

How to extract MP3 files from FLV video files with freeware command-line ffmpeg (Windows, Linux, Mac OS X)

First of all find out what type of audio is used in the video file:

ffmpeg -i inputfile.flv

You will get something like

Stream #0.1: Audio: mp3, 44100 Hz, mono, s16, 128 kb/s

Now you know that MP3 audio is used (or AAC, or Speex, or Wav,...), so use the following command:

ffmpeg -i input.flv -vn -acodec copy output.mp3

Replay Media Catcher (RMC) 4 uses ffmpeg for extracting MP3 audio tracks from FLV files to MP3. If you don't like command line tools, you can use software like RMC 4 instead:



How to convert FLV (with MP3 audio track) to MP3 without losing quality with Replay Media Catcher (RMC) 4 after downloading FLV file automatically:

• Open Replay Media Catcher.
• Start Recording
• Select the "Audio Extraction (Extract MP3 to MP3)" conversion preset
• Navigate to a web-site you want to record FLV stream from
• HTTP and RTMP .FLV streams will be downloaded/captured automatically. Then MP3 audio tracks will be extracted to .MP3 files automatically.

How to convert any FLV or MP4 file (with MP3 audio track) to MP3 with Replay Media Catcher 4:

• Open Replay Media Catcher.
• Select the "Audio Extraction (Extract MP3 to MP3)" conversion preset
• Go to "Tools" -> "Convert ..."
• Select FLV files from which you want to extract MP3 audio tracks
  (CTRL key can help to select multiple files) and hit the "Open" button.
• MP3 tracks from the selected FLV file(s) will be extracted into .MP3 file(s)

How to extract MP3 audio from FLV files using freeware FLV Extract

FLV Extract allows to extract both audio and video tracks from FLV files. We will extract MP3 audio from FLV audio only files (using MP3 audio tracks) or from FLV video files (using MP3 audio tracks):

1. Download FLV Extract and unpack it.
2. Run FLV Extract
3. Tick the Audio checkbox and untick the Video and Timecodes checkboxes:
   
   
   
4. Open the folder with downloaded/captured FLV file(s)
5. Left click on the FLV file and drag-n-drop it onto FLV Extract.
   This will automatically launch the MP3 audio extraction (demuxing) process.

Replay Converter is an audio/video converter. It allows to extract audio tracks (like MP3, AAC) from video files.

How to convert FLV (with MP3 audio track) to MP3 without losing quality with Replay Converter:

1. Open Replay Converter
2. Hit the "Add files" button on the right.
3. Select your FLV file(s) and hit the "Open" button.
4. In the main window of Replay Converter right-click on your FLV file (or select multiple files and then right click on one of them).
5. Select "Extract".
6. Hit the "OK" button (Repeat this step for every FLV file you want to extract MP3 audio tracks from).
7. Hit the "GO" button in the main window to start the extraction process.

Note that Replay Converter will extract MP3 audio tracks from FLV files using MP3 audio, AAC audio tracks from FLV files using AAC audio,...

[noob2001204]

To extract MP3 audio from flv file you can use the DSM converter from Media Player Classic

here's the video tutorial

http://www.youtube.com/watch?v=II3dnd8g-EQ

[any ANONYMOUS forum user]

How to download music video from YouTube for FREE. How to extract MP3 song from YouTube music video for FREE (Replay Media Catcher video tutorial)

i think there are many good flv converter tools can do it.i am using *********,i think it is a cool tool.it help me convert flv to any video formats.

[kpmedia]

Good post. This is EXACTLY what I needed.
In the middle of fixing an FLV mess.

[gimgim]

I found a software named "FLV Extract" which is perfect to extract the mp3-Track from my downloaded FLV-Video. But, when I try to extract only the video, FLV Extract gives me a short video of the whole video file (20 min instead of 50 minutes).