Bruno der Schwarze - Es blies ein Jäger wohl in sein Horn
Directed by
1971
Portrait of Bruno S., who later became the leading actor in two films by Werner Herzog ("JThe Enigma of Kaspar Hauser", 1974; "Stroszek", 1976), and of two other protagonists.
Link: Information about the film (Archiv der dffb) (in German)