How to figure out which files have DRM?

[Lord Hamsa]

I have a collection of media files, all in M4V format, but some of them are downloaded from iTunes (in the days before iTunes went away). Is there a good way to filter through all of my files to quickly figure out which ones are my personal rips vs. the DRM protected downloads? I want to start using Plex for my ripped titles, while continuing to watch the purchased/DRM content through the Apple TV app (or the TV app on my Mac).

(Alternate acceptable solution: how to get Plex to ignore DRM protected files when in the same directory as other files)

 

[NoBoMac]

Finer details left as an exercise, but to find all the mp3 files in the current directory and list their type:

find . -type f -name '*.mp3' -depth 1 -print0 -exec echo -n " " \; -exec mdls -name kMDItemKind {} \;

DRM-ed files will have extraneous information in there pointing to DRM.

My Podcasts library shows something like this:

./55C370C7-A27B-4AB0-B05F-14E72A78BA27.mp3 kMDItemKind = "MP3 audio"
./5AFE5608-F0F0-4CDB-A3A1-DE7139FA3EAA.mp3 kMDItemKind = "MP3 audio"