frei0r license is GPL.
Based on a patch by Timothy Gu <timothygu99@gmail.com>.
See thread:
Subject: [FFmpeg-devel] [PATCH 1/2] LICENSE: Complete GPL'd external libraries list
Date: Thu, 6 Jun 2013 18:55:30 -0700
--------------------
The following libraries are under GPL:
+ - frei0r
- libcdio
- libutvideo
- libvidstab
enabled $1 || { enabled $2 && die "$2 is incompatible with the gpl and --enable-$1 is not specified."; }
}
+die_license_disabled gpl frei0r
die_license_disabled gpl libcdio
die_license_disabled gpl libutvideo
die_license_disabled gpl libvidstab