WAV is Mr. Bloat. Extract WAV 48 KHz from an mp4 video = 6 GB .wav file output.

More efficient is to just use ffmpeg. lmao. Result: 1:1, 500 MB. Couldn't be more efficient!
ffmpeg -i file.mp4 -vn -acodec mp3 output.mp3

... and if you still care about the audio being lossless, FLAC is your friend.

are you seriously complaining that an UNCOMPRESSED RAW FORMAT, designed to be the simplest possible representation of the data, is bigger than a humongously compressed format that has been optimised and fine-tuned for space savings over the years?

Correction on my post: it turned out to be 5 MB audio for a 500 MB file.

@tosensei omnomnomnom