Janssen & Janssen is a music performance with dance and computers animations. The music was composed by Guus Janssen. The world premiere was April 29 2007, in De Doelen, Rotterdam, performed by the DoelenEnsemble.

• Arie van Beek - conductor
• Guus Janssen - clavecimbel
• Mattijs van de Woerd - bariton
• Karin Post - choreography
• Yvonne Fontijne - computer animations
• Cecilia Moisio - dance

The performance consists of five pieces of music. Four of those pieces are accompanied by pre-rendered computer animations. In the remaining piece, real-time motion capture is used to drive computer animations. The total duration of the real-time motion capture part is approximately 15 minutes.

The short videos on this page show two clips from the part with the real-time motion capture. In the top clip the dancer drives a puppet made from metaballs. In the bottom clip, each half of the body of the dancer animates one of the cylinders.

The responsibilities of Fontijne Production Services in the performance included:

• Studio motion capture for pre-rendered animations.
• Real-time motion capture for real-time animations.
• Implementation of real-time computer animations.
• Playback of the pre-rendered animations at 1024 x 768, 60Hz.