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.