FFMPEG file installed, but audacity won't open .mp4 file (v.3.0.1 Release)

Audacity 3 Help Forum Windows
2

  1. I would start by downloading the most recent version of Audacity from here: https://www.audacityteam.org/download/

  2. When you installed FFMPEG, did you download the .zip or the .exe file?

  3. Try to open your .mp4 file again, then post the contents of your Audacity log. Help > Diagnostics > Show Log.

See also this related issue: https://forum.audacityteam.org/t/cannot-import-mp4-file-because-ffmpeg-fails/61653/1