RFC 文档RFC 8829 - JavaScript Session Establishment Protocol (JSEP)4.2. RtpTransceiver本页总览4.2. RtpTransceiver4.2. RtpTransceiver 本小节描述 RtpTransceiver 接口及其方法. 子章节 4.2.1. stop 4.2.2. stopped 4.2.3. setDirection 4.2.4. direction 4.2.5. currentDirection 4.2.6. setCodecPreferences