Warum eigentlich so kompliziert? Ich habe mal google befragt:
http://www.fsf.org/licenses/gpl-faq.html#GPLAndPlugins
ZitatIf a program released under the GPL uses plug-ins, what are the requirements for the licenses of a plug-in.
It depends on how the program invokes its plug-ins. If the program uses fork and exec to invoke plug-ins, then the plug-ins are separate programs, so the license for the main program makes no requirements for them.
If the program dynamically links plug-ins, and they make function calls to each other and share data structures, we believe they form a single program, so plug-ins must be treated as extensions to the main program. This means they must be released under the GPL or a GPL-compatible free software license, and that the terms of the GPL must be followed when those plug-ins are distributed.
If the program dynamically links plug-ins, but the communication between them is limited to invoking the `main' function of the plug-in with some options and waiting for it to return, that is a borderline case.
Für vdr trifft eindeutig der 2. Part zu, denn hier wird ja nix dynamisch gelinkt, sondern die vdr-sourcen sind notwendig damit das Ding kompeliert werden kann.
Folglich stehen die Dinger unter GPL.