The grandson of a film sound Engineer, Carpenter was born in Van Nuys, California in 1950 to a family of six. After his parents divorced in 1960, he moved with his mother and 4 siblings to Orange County, where he took up Super 8 films as a hobby. He enrolled in San Diego State University to study television directing, but later changed his major to English. To pay for school, he worked at a local public broadcasting, where he learned the ropes of documentary filmmaking. After graduating, he moved back to Orange County, where he shot educational films and documentaries.