Hi Alexandre,
it took quite a lot of searching, but now it's done. It was a general RTPProxy/PThread issue. The problem seems to be, that the PThread is created before the fork of the main process. Then the Thread waits forever...
Attached an changed main.c + rtpp_defines.h which modifies this behaviour and starts the Thread after the fork. I will create an according patch and send it to the RTPProxy-Dev-Mailinglist as well.
Have fun, Carsten