[1] Innemann's early career was varied; he was involved in operettas, comedies and melodramas, short films and documentaries, often as cameraman.

He directed a total of 16 silent films: in 1931 he directed his first sound film, Poslední bohém (The Last Bohemian), about the Czech writer Jaroslav Hašek, and made the popular comedy Muži v offsidu (Men in Offside) with Hugo Haas in the title role.

The 1932 film Před maturitou, made in cooperation with the Czech writer Vladislav Vančura, is considered Innemann's second creative peak.

His film career ended in 1937 with Švanda dudák, based on a theme by Josef Kajetán Tyl.

[3] During World War II, Innemann cooperated with the ambitious Czech director and Nazi collaborator Václav Binovec.