Manoel Cândido Pinto de Oliveira was a Portuguese film director and screenwriter born in Cedofeita, Porto. He first began making films in 1927, when he and some friends attempted to make a film about World War I. In 1931, he completed his first film Douro, Faina Fluvial, a documentary about his home city Porto made in the city-symphony genre. He made his feature film debut in 1942 with Aniki-Bóbó and continued to make shorts and documentaries for the next 30 years, gaining a minimal amount of recognition without being considered a major world film director.

A documentary film or documentary is a non-fictional motion picture intended to "document reality, primarily for instruction, education or maintaining a historical record". Bill Nichols has characterized the documentary in terms of "a filmmaking practice, a cinematic tradition, and mode of audience reception [that remains] a practice without clear boundaries".