I usually don't write about film here, but I think Polanski's first feature Nóz w wodzie (Knife in the Water) merits discussion on a music blog for a couple of reasons. The most obvious is the atmospheric Jazz soundtrack. The Swedish tenor sax virtuoso Bernt Rosengren features very prominently in the experience of watching this film. His evocative solo performances underline the eerie feeling of isolation that the three boaters encounter.
The second reason is Polanski's incredible formal discipline shooting on the boat. The artful shots of the characters laying on deck and the constant interplay between the horizantal and vertical lines of the boat and the horizon prefigures the formal ideas in a lot of modern music videos.
Here is a clip from the film, featuring Rosengren's music and the incredibly hot Jolanta Umecka making her first appearance in that bikini...
You can see the entire film in much better quality for free (although only in the US and Canada) thanks to The Auteurs here