Can't extract audio from MP4 file

[Alonshow]

I want to extract the audio from an MP4 file, but for some reason it doesn't work. The file itself plays OK, both the video and the audio, but I'm wondering if it might be corrupted. I have tried to extract the audio with My MP4Box GUI and Avidemux, but both have failed.

I attach a short segment of the video so you can check what might be wrong and whether it is possible to fix it: Short excerpt.mp4

[El Heggunte]

I managed to extract the audio stream with FFmpeg:

ffmpeg -i "Short excerpt.mp4" -vn -acodec copy audioextract.mp4

The volume is incredibly low, BTW

[manono]

AoA Audio Extractor extracts it as WAV audio easily enough.

[sambat]

AviDemux with audio set as wav pcm saves the audio ok.

[Alonshow]

Thank you. I used AviDemux because I'm already familiar with it.