FS-7499: ignore replay errs when nack is enabled

src/mod/applications/mod_conference/mod_conference.c

@@ -1820,6 +1820,7 @@ static void *SWITCH_THREAD_FUNC conference_video_muxing_thread_run(switch_thread
 
 		if (conference->canvas->send_keyframe) {
 			need_keyframe = SWITCH_TRUE;
+			need_refresh = SWITCH_TRUE;
 			conference->canvas->send_keyframe = 0;
 		}
 

src/switch_rtp.c

@@ -5087,6 +5087,14 @@ static switch_status_t read_rtp_packet(switch_rtp_t *rtp_session, switch_size_t
 
 				if (!(*flags & SFF_PLC)) {
 					stat = srtp_unprotect(rtp_session->recv_ctx[rtp_session->srtp_idx_rtp], &rtp_session->recv_msg.header, &sbytes);
+					if (rtp_session->flags[SWITCH_RTP_FLAG_NACK] && stat == err_status_replay_fail) {
+						/* false alarm nack */
+						switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(rtp_session->session), SWITCH_LOG_DEBUG, "REPLAY ERR, FALSE NACK");
+						stat = 0;
+						sbytes = 0;
+						*bytes = 0;
+						goto more;
+					}
 				}
 
 				if (stat && rtp_session->recv_msg.header.pt != rtp_session->recv_te && rtp_session->recv_msg.header.pt != rtp_session->cng_pt) {