Via Udo Vetter's excellent lawblog, this police report (g) from Bamberg, Germany:
Early Saturday morning, a person on the Schönleinplatz was halted by police for a check. The 29-year-old student refuse to tell police his personal information and began filming the policeman. He was informed that this was not allowed and constitutes a criminal offense, but the man nevertheless continued.
As his mobile telephone was being seized, the man resisted officers and was arrested.
He has been charged with resistance against peace officers.
Vetter believes the charges should be dropped, since the police officer's claim that filming him was illegal was incorrect, and citizens are permitted to resist illegal police actions. However, the comments reflect a wide variety of views about whether filming the cop was in fact legal or not, and if not, whether it could be a criminal or civil offense.
The upshot: if you attempt to record police officers in Germany, they may seize your phone and arrest you, and you will only find out your actions were justified after a long and expensive legal proceeding. This is practically the definition of 'chilling effect'.
It's long past time for Germany to pass a law making it absolutely clear that any citizen has the right to film and broadcast any police officer in the performance of his or her duties, no matter what, under any circumstances, as long as the filming does not interfere with performance of the officers' duties.