FLV to AAC: How to extract FLV video to AAC audio? Any AAC extractor for FLV files?

[any ANONYMOUS forum user]

How to extract FLV video to AAC audio losslessly? Any freeware AAC extractor for FLV files? Or a nice commercial program?

Freeware FLV Extract allows to extract audio tracks (including AAC audio tracks) from FLV files

FLV Extract allows to extract both audio and video tracks from FLV files. We will extract AAC audio from FLV audio only files or from FLV video files:

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) from BBC.
5. Left click on the FLV file and drag-n-drop it onto FLV Extract.
   This will automatically launch the AAC extraction (demuxing) process.

Replay Media Catcher 4 has a couple of AAC extraction presets:
- Audio Extraction (Extract AAC to M4A)
- Audio Extraction (Extract AAC to M4B)



So you can extract AAC tracks to M4A or M4B losslessly using RMC 4 (Jaksta)

How to extract AAC from FLV to M4A with Replay Media Catcher after downloading FLV file automatically:

• Open Replay Media Catcher.
• Start Recording
• Select the "Audio Extraction (Extract AAC to M4A)" 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 AAC audio tracks will be extracted to M4A files automatically.

How to extract AAC from FLV to M4B with Replay Media Catcher after downloading FLV file automatically:

• Open Replay Media Catcher.
• Start Recording
• Select the "Audio Extraction (Extract AAC to M4B)" 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 AAC audio tracks will be extracted to M4B files automatically.

How to extract AAC from any FLV file to M4A with Replay Media Catcher:

• Open Replay Media Catcher.
• Select the "Audio Extraction (Extract AAC to M4A)" conversion preset
• Go to "Tools" -> "Convert ..."
• Select FLV files from which you want to extract AAC audio tracks
  (CTRL key can help to select multiple files) and hit the "Open" button.
• AAC tracks from the selected FLV file(s) will be extracted into M4A file(s)

How to extract AAC from any FLV file to M4B with Replay Media Catcher:

• Open Replay Media Catcher.
• Select the "Audio Extraction (Extract AAC to M4B)" conversion preset
• Go to "Tools" -> "Convert ..."
• Select FLV files from which you want to extract AAC audio tracks
  (CTRL key can help to select multiple files) and hit the "Open" button.
• AAC tracks from the selected FLV file(s) will be extracted into M4B file(s)

How to extract AAC autio tracks from FLV or MP4 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: AAC, 44100 Hz, stereo, s16, 128 kb/s

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

ffmpeg -i input.flv -vn -acodec copy output.m4a

or

ffmpeg -i input.flv -vn -acodec copy output.m4b

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

How to extract AAC audio track from FLV files (with AAC audio) using 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 AAC audio tracks from).
7. Hit the "GO" button in the main window to start the extraction process.

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