Name of this movie from the past

I have been trying to track down this movie and I seemed could not find the answer. I hope this is the place where I may get the answer at last. B&W film Filmed looked like in East Europe Prisoners from the war captured Prisoner fellow was thin, and wore long trench coat Played harmony when he can Being tortured by this Warden Warden Fat woman in soldier uniform This Warden does not walk but rode on a motorcycle with a sidecar, she sat on a sidecar. She rode around on this prisoner as a way of humiliating him. At ending of the movie, she let him go free.