Here’s a useful write‑up explaining the error “Avidemux cannot use that file as audio track”, why it happens, and how to fix it.
Older versions of Avidemux have known bugs with specific audio headers. avidemux+cannot+use+that+file+as+audio+track
This is the overwhelming cause of the error. Look at the main Avidemux window. On the left-hand sidebar, you’ll see a section labeled "Audio Output" with a dropdown menu. why it happens
With trembling fingers, he loaded the stripped file. He clicked "Open." avidemux+cannot+use+that+file+as+audio+track