Extracting Hi Res Audio in FLAC From MP4 Video Files

[mikey8811]

Hi

 

I was sent some bootleg live videos taken by a friend in MP4 format.

 

I want to extract just the audio tracks which are in 32-48 kHz to FLAC.

 

I have tried VLC which can only extract to 16-44.1 WAV - the FLAC files turn out weird.

 

I have also tried AVIdemux which extracts to 16-48 WAV.

 

Is there anyway to do this while preserving the original 32-48 kHz data?

 

I am on Mac OS Big Sur if that matters.

 

Thanks

[stefano_mbp]

You could try XLD, it can read MP4

https://tmkk.undo.jp/xld/index_e.html