Extended
constructor(mimeType: String, kind: MediaKind, clockRate: Int, channels: Int?, localPayloadType: Int?, remotePayloadType: Int?, localParameters: Map<String, String>, remoteParameters: Map<String, String>, rtcpFeedback: List<RtcpFeedback>, localRtxPayloadType: Int? = null, remoteRtxPayloadType: Int? = null)