Several mp3s in my large collection are silent, or almost entirely so. Please help me find ways of detecting them automatically. I ripped all of my 1200+ CD collection using cdparanoia, and put them in storage. The files are now being served by a linux box running Firefly Media Server. For unknown reasons, some of the tracks have ended up being silent, or containing very short bursts of noise separated by silence. I've uploaded a typical example; it's supposed to be Robyn Hitchcock and The Egyptians ? Oceanside.

What I'd really like is a script or command-line program that will scan an mp3 and indicate if it's mostly or entirely silent. It would be preferable if the process were fairly quick, as there are about 20000 files to scan.