CPC Class H04N

A control method includes detecting a first object within a first range corresponding to an output device, obtaining a first relative position relationship between the first object and the output device, and adjusting an output parameter of output light of the output device based on the first relative position relationship, to cause the output device to be in a first output state relative to the first object.

A multiple recording device management system including an intermediate multiple recording device managing apparatus, a vehicle recording device mounted in a police vehicle and synced to the managing apparatus, and a personal recording device carried by a police officer and wirelessly synced to the managing apparatus. The managing apparatus is operable to detect when the vehicle recording device, personal recording device, or any other synced device in range has begun recording and to transmit a communication signal to any synced recording device in range indicating that the recording device should begin recording and to further transmit a time stamp to synced recording devices for corroborating recorded data.