mp4 custom metadata with space in tag name

[StarGeek]

This might not be something you want to deal with, since it appears to be custom metadata, but I thought I might bring it up.

I came across this SuperUser question where someone added custom metadata with the name "Projection Type" (space included).  I followed the instructions there and created this test file.

Exiftool doesn't show the custom "Projection Type" tag unless the -u option is used and then showed it as Unknown_0x0005.  FFProbe listed the data as "Projection Type".

[Phil Harvey]

Ah.  Thanks for the sample.  I didn't know that space was a valid character in a Key name, and ExifTool was rejecting this.  It will be fixed in the next version.

Also, I see that the group names for most of the Keys tags are wrong.  (Reported incorrectly as ItemList.) I will fix this too.  (Technically, Keys tags are in the ItemList, but they are stored differently because their names are taken from entries in a Keys directory, unlike other ItemList tags, so I put them in a different group.)

- Phil