How many movies have Daniel Barenboim and Johannes Martin Kränzle acted in together?

They have worked on 4 movies together! Their first movie together was Wagner: Das Rheingold (2013) while their highest rated movie together was Wagner: Götterdämmerung (2014). They have not worked together since Rimsky-Korsakov: The Tsar's Bride (2015). They are most known for their music films together.