Hi everyone,

I'm looking for recommendations on the best tools to extract audio from video files. I’ve got some MP4 and MOV files, and I’d like to convert them into high-quality MP3 or WAV files. I’ve tried a few audio extractor from video online tools, but I’m looking for something that retains sound quality and supports batch processing.

Ideally, it would work on both Windows and Mac, and have a user-friendly interface. Any tips on software you've had good experiences with? Free options would be awesome, but I’m open to paid tools if they’re worth it.

Thanks in advance!

 

ffmpeg -i video_file.mp4 -map 0:a:0 -c:a copy output.mp4

Will losslessly extract the first audio stream from a video file. ffmpeg is free & open source and available on all OSs. It's the best tool, but far from the best user experience. I'm sure there's a pretty Mac GUI available though!

 

Put your video on a REAPER track and export the audio to the format of your choosing

 

best way is probably a video editing software like Vegas, Premiere or DaVinci. Or something free open source. Then you can edit the file for your liking before rendering a .Wav or mp3 file

 

If the file has DTS or Dolby, surround or stereo audio, MP4BOX will extract the audio stream along with the video stream into separate files. The audio stream being a .DTS or .AC3 (dolby) file, no losses incurred. At that point it's an easy task to pull that audio stream into any decent audio editor and make your final file. I would suggest .FLAC as a final compressed LOSSLESS format. Last I heard MP4BOX was free.

 

Last edited: Oct 27, 2024 at 8:54 PM

It depends which audio stream you want, because .mp4 or .mov are containers, I don't think you'll find within uncompressed .wav or (lossless) .flac.
Usually are aac, opus or m4a, always compressed.

You can try Virtualdub or Xrecode (supports batch I think) or similar and extract the stream(s), but if you don't like the above formats, you'll have tho recode them (losing quality), and that brings you at the starting point: instead of extract streams, encode clips directly (i.e. mp4 to mp3) with your desired quality (losing quality in anyway).

BTW I suggest before any operation to check audio quality of the video clip with a spectrogram (i.e. spek): if the frequency cut is 15kHz there is no logical sense to convert it in 320kb mp3, and more so in wav or flac.

See below the example: 128kb are enough to retain quality.

 

I would always use a splitter for such a task: e.g. MKVCleaver for MKV files or MP4Box (GUI) for MP4 or MOV files. They can also process multiple files at the same time. They extract the original audio track from the container file. This eliminates the need for additional encoding.

 

Ya right, as you pointed out there will be no mp3 or wav or flac as OP requested, so converting is mandatory in this case.

Spek (or any spectrogram sw) is our friend, as it shows the real bandwidth no matter the audio format/bitrate contained in mp4 or whatever.

 

mkvtoolnix will extract any audio from a video file in a matter of seconds.