In 1936, Liebeneiner became a member of the Prussian State Theater (Preußisches Staatstheater) in Berlin and in 1938, he became artistic director of the German Film Academy Babelsberg (Deutsche Filmakademie Babelsberg). In 1941, he directed the film Ich klage an (I accuse) in cooperation with the National Socialist Ministry of Public Enlightenment and Propaganda. The film was about voluntary euthanasia of a woman suffering from multiple sclerosis, but was intended to support the T4 euthanasia program. He received a doctorate in the years from 1942 to 1945 while working for Universum Film AG, the largest German film studio at that time.
He died on 28 November 1987 in Vienna after a long illness.
Liebeneiner was married twice: first, from 1934 to the actress Ruth Hellberg, then from 1944 to the actress Hilde Krahl, with whom he had his daughter Johanna Liebeneiner (de), who also became an actress.
- The Other Side (1931)
- Asew (1935)
- Liebelei (1933, acting, directed by Max Ophüls)
- The Model Husband (1937)
- Don't Promise Me Anything (1937)
- You and I (1938)
- Target in the Clouds (1939)
- Ich klage an (1941)
- Friedemann Bach (1941)
- Die Entlassung (1942)
- Melody of a Great City (1943)
- Love '47 (1949)
- On the Reeperbahn at Half Past Midnight (1954)
- The Trapp Family (1956)
- Queen Louise (1957)
- Goodbye, Franziska (1957)
- The Trapp Family in America (1958)
- This article incorporates information from the German Wikipedia.