The audiovisual services of the Bibliothèque nationale de France

The audiovisual documentary service of the Bibliothèque nationale de France, both patrimonial and encyclopaedic, is comprised of sound and video archives, and multimedia sources either gathered by legal deposit, or by acquisition. This article describes the organization of this service on the Tolbiac site ; the authors analyse, from the upper-garden to the garden level, the audiovisual system, its technical aspects, the difficulties faced and the proposed solutions