Method and Device for Negotiating Media Capability

A method for negotiating a media capability, comprising:

• sending, by a first device, a first message to a second device, wherein the first message comprises information about at least one media capture capability supported by the first device, and at least one first association identifier corresponding to the at least one media capture capability;
• sending, by the first device, a third message to the second device, wherein the third message comprises at least one configuration item supported by the first device and at least one second association identifier corresponding to the at least one configuration item, and wherein the at least one first association identifier corresponds to the at least one second association identifier in a one-to-one manner;
• receiving, by the first device, a second message sent by the second device, wherein the second message comprises the 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;
• and
• receiving, by the first device, a fourth message sent by the second device, wherein the fourth message is a response message for the third message.