While he directed several films, he didn't appear in them as an actor.
Here are some of his most notable films:
* "A Noite" (1931): One of the first sound films in Brazil.
* "O Cangaceiro" (1926): A silent film considered a landmark in Brazilian cinema.
* "O Homem que Matou o Tigre" (1923): A silent film that helped establish Mauro's reputation.
You might be mistaking him for a different person. If you could provide more information about the actor you're looking for, I can assist you further.