I use exiftool almost as much as I use curl. It is almost always the first thing I install on every new computer I set up. I've never used it to edit metadata,

I use exiftool almost as much as I use curl. It is almost always the first thing I install on every new computer I set up. I've never used it to edit metadata, it's just insanely useful for diagnosing weird issues with files. Definitely put it on your list of utilities to check out, if you haven't.