Abstract: Control device for a flow of objects in continuous file and, more particularly, of postal parcels or packages, prior to their introduction into a separator mechanism which imposes at its oulet a suitable spacing between one object and the next, which comprises a first conveyor belt on which the objects are disposed in bulk, this conveyor travelling at a variable linear speed (V1), a second conveyor belt, disposed following the first and driven at a similarly variable linear speed (V2), a photographic camera for the acquisition in real time of an image of the second conveyor and of the packages transported by it, presenting according to the length of the conveyor a given longitudinal dimension (L), a processing circuit for the image received from the camera in order to discern within this image the number of packages (Nc) which it contains, a computer for controlling the instantaneous speeds (V1 and V2) of the two conveyors during the transfer of the packages disposed on the second conveyor according to the di