Miletić participated in an amateur film competition in Paris in 1933 with his Poslovi konzula Dorgena and received an award from Louis Lumière. His 1937 film Šešir was the first Croatian movie filmed with sound. In the Independent State of Croatia, Miletić filmed three cultural films for Germany's Tobis Film: Hrvatski kipari, Hrvatski seljački život and Agram, die Hauptstadt Kroatiens. While all three films were originally thought lost, Daniel Rafaelić discovered Hrvatski seljački život in a Vienna film archive in 2004 and in 2008 discovered Agram, die Hauptstadt Kroatiens in a German film archive.