Fantastic Planet/ La Planète Sauvage (1973).
Wiki.
Youtube Link.
Version Française.

Creepy and unsettling French sci-fi animation featuring a very groovy score by Alan Gorageur, arranger for Serge Gainsbourg and France Gall during the early part of both their careers.
Designed and co-scripted by illustrator and novelist Roland Topor, author of 'The Tenant'.

From Wiki:
"Fantastic Planet is the English title of La Planète sauvage (literally "The Savage Planet") an animated 1973 science fiction film directed by René Laloux. The film was an international production between France and Czechoslovakia and has been distributed in the United States by Roger Corman. It won the special jury prize at the Cannes Film Festival in 1973. The story is based on a novel, Oms en série, by the French writer Stefan Wul."
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