A method of content adaptive encoding video is disclosed. The lateral openings of the containers, for loading purposes, are located in the interior of the conveying loop, and the transporting element of the material infeed is arranged within the conveying loop, and transports the items of mail into the lateral openings of the containers in a horizontally aligned semicircular conveying section. The metal may be heated prior to the force filling step. Each pixel delivers a radiation dose no greater than a predetermined normal maximum dose to the target portion in the exposure step andor at least one selected pixel delivers an increased radiation dose, greater than the normal maximum dose. Preferably, the stem extends freely through the outer casing but press-fittingly receives the activating member such that the activating member moves in axial unison with the stem.