Add comment in MP4

Question

I have a bunch of MP4-Files and need to add comments to them. They are very different in nature, so I can't rely on an embedded MP3-File. Is there any way to simply "tag" or add a short comment to the file?

Answer 1

I found this tool:

http://sourceforge.net/projects/atomicparsley/files/

which allows me e.g. to tag like this:

AtomicParsley test.mp4 --encodingTool "myencoder"