Sound level quite lower in download than on YouTube

[Louis2024ht]

OK, first, it's not a Parabolic bug at all, because the result is 100 % the same when downloaded directly in yt-dlp, but in case of, just wanted to mention this.

With this YouTube video (and probably others) :

https://www.youtube.com/watch?v=9d_22U8OW2I

, the sound level is much better on YouTube than on the downloaded video. Probably due to what Ffmpeg is doing, or maybe YouTube does automatically correct too low volume levels?

In case of, here are its audio data from MediaInfo :

Maybe, it's this -29 dB normalization thing that is responsible? Would there be a way to avoid it?

[Louis2024ht]

OK, for anyone interested, choosing Audio Format :

instead of "Best" solved the problem.

Conclusion : biggest bitrate doesn't always mean best sound level at all.