During video audio recording, key frames are temporarily stored from the video audio stream to be recorded, and metadata is later generated from the temporarily stored key frames. An arm-receiving opening is formed in a connecting member provided on the lens frame. The apparatus includes a separate support table for supporting each of the plurality of cassettes within the plate handler and an elevator device for moving each of the support tables along a vertical axis of the automated plate handler. As the carbonic acid solution passes to the exterior of the diffuser, the pressure drop causes an effective mixing of the carbonic acid solution and the water.