Importing mp4 and m4a into Audacity

I am new to audacity and I am attempting to import either a mp4 or m4a file with no luck?

Audacity will import the MP4 (without the video) and M4A directly…as soon as you install the FFMpeg add-on software.

https://www.audacityteam.org/download/windows/

Scroll down. That’s the file structure for Windows.

Koz