How many movies have Lucia Popp and Otto Schenk acted in together?

They have worked on 3 movies together! Their first movie together was Die Zauberflöte (1964) while their highest rated movie together was Beethoven Fidelio (1978). They have not worked together since Smetana: The Bartered Bride (Wiener Staatsoper) (1982). They are most known for their music films together.