How does this affect the police in Germany and their ability to record / photograph? What about security cameras, or doorbell cameras - are they illegal, or is consent applied by someone approaching them?
Just like you could look out of your windows, but you could not watch out of your window 24/7 :D
edit: did some digging on dash-cams, seems like they're legal if they're recording on a loop, and save permanently with some user-interaction.
Security cameras must have signs, and not cover outside your property. Storage is (suggested? allowed?) for 24-48 hours. You can request footage of yourself from anyone (even private?), but they have 1 month to reply to a request - so seems practically pointless given the recording storage length.
Also: AFAIK, they can't access the records unless it's requested from someone or if there is a case and the records would help solve the case.