A method includes sending, by a first device, a first message to a second device, sending a third message to the second device, where the first message includes information about at least one media capture capability supported by the first device, and at least one first association identifier, the third message includes at least one configuration item supported by the first device and at least one second association identifier, and the at least one first association identifier corresponds to the at least one second association identifier in a one-to-one manner, and receiving, a second message and a fourth message sent by the second device, where the second message includes at least one media capture capability that is selected by the second device according to the first message and the third message, and at least one third association identifier corresponding to the at least one media capture capability.