Comment 10 for bug 508123

And we can mixed both together ia have a window show you (in the preferences by exemple) all the codecs installed and not installed. And you can have a warning when the user want to encode in a format/codec which is not installed on his system.
i can not launch the file of Andy :
olivier@triton:~/Téléchargements$ chmod +x find_codecs.py
olivier@triton:~/Téléchargements$ ./find_codecs.py
./find_codecs.py: line 4: Erreur de syntaxe près du symbole inattendu « ( »
./find_codecs.py: line 4: `def main():'
A idea perhaps ?