Jazz great Betty Carter gets her due in “… But Then, She’s Betty Carter.” Michelle Parkerson’s 1980 documentary catches the vocalist in mid-career and celebrates her legacy of staunch independence, from refusing to commercialize her sound to founding her own record label (in the ’60s!) and raising two sons as a single mother. Tonight, the hour-long film continues the 9th International African Film Festival, the Sembène — Film & Arts Festival’s program exploring the culture of the African diaspora. The festival continues into April at Alphabet City with six more films from five different countries. -Bill O'Driscoll