Get last line of shell output as a variable

Question

I am working on a shell script with exiftool to automatically change some exif tags on pictures contained in a certain folder and I would like to use the output to get a not

Answer 1

Put the tail inside the capturing parens.

OUTPUT=$(exif ... | tail -1)

You don't need the double quotes here. I'm guessing that you tried

OUTPUT="$(exif ...) | tail -1"