[FFmpeg-user] determining average audio level

[mark edwards]

hello all -

i am sorry to ask such a basic question but my brain is shot today.

i need to determine if i have a totally blank audio file or not.
 apparently just looking at the file size is not an answer!

if i wanted to use ffmpeg (or ffprobe?) to determine if there is any audio
content there, what is the best way to do it?   average audio level or
something equally easy?

thank you in advance for tolerating such a basic question.