FFmpeg is open source, licensed largely under the Lesser General Public License (LGPL), though certain parts, for various reasons, are General Public License (GPL), version 2. There are certain provisions about when you must provide source code if you use the program. Some programs do not follow these rules.

We have started tracking these violators in the FFmpeg Hall of Shame. Each violator is listed with a link to its case in the FFmpeg issue tracker. We’re actively trying to work with all violators to resolve these issues. The Hall of Shame seems to be reserved for particularly unresponsive violators.