History (via Wiki): Pink Floyd: Live at Pompeii is a 1972 Adrian Maben film featuring Pink Floyd performing six songs at the ruins of the empty ancient amphitheatre in Pompeii, Italy.
The performances of “Echoes“, “A Saucerful of Secrets”, and “One of These Days” were filmed from October 4, 1971 to October 7, 1971. The remaining songs were filmed in a Paris studio, along with additional bluescreen footage for insertion into the Pompeii performances. The sequences in Paris were filmed in late 1971/early 1972, and can be distinguished by the absence of Rick Wright’s beard. This version was released in theaters in September 1972 and also appears on the DVD version.
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