FS-4437 try this revision

src/switch_rtp.c

@@ -4517,13 +4517,14 @@ SWITCH_DECLARE(int) switch_rtp_write_frame(switch_rtp_t *rtp_session, switch_fra
 
 		send_msg = frame->packet;
 
+		if (!switch_test_flag(rtp_session, SWITCH_RTP_FLAG_UDPTL)) {
+			if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_VIDEO)) {
+				send_msg->header.pt = rtp_session->payload;
+			}
 		
-		if (switch_test_flag(rtp_session, SWITCH_RTP_FLAG_VIDEO)) {
-			send_msg->header.pt = rtp_session->payload;
+			send_msg->header.ssrc = htonl(rtp_session->ssrc);
 		}
-		
 
-		send_msg->header.ssrc = htonl(rtp_session->ssrc);
 
 		if (switch_socket_sendto(rtp_session->sock_output, rtp_session->remote_addr, 0, frame->packet, &bytes) != SWITCH_STATUS_SUCCESS) {
 			return -1;