OUAGADOUGOU (AFP) - An Ethiopian film bringing to life the horrifically brutal 1970s and 1980s regime of dictator Mengistu Haile Mariam took top honours Saturday at Africa's main film festival. "Teza" by US-based, Ethiopian-born director Haile Gerima was the jury's unanimous choice for this year's Golden Stallion of Yennenga, the award for best film at the gathering in Ouagadougou, considered Africa's Oscars. The beautifully shot film switches between past and present as it tells the story of an idealistic scientist who studied in Germany in the 1970s before returning to Ethiopia during the Mengistu era.