diff --git a/daemon/call.h b/daemon/call.h
index 254065924..a049a59f8 100644
--- a/daemon/call.h
+++ b/daemon/call.h
@@ -342,6 +342,7 @@ struct call_media {
 	GHashTable		*codec_handlers; // int payload type -> struct codec_handler
 						// XXX combine this with 'codecs_recv' hash table?
 	volatile struct codec_handler *codec_handler_cache;
+	struct rtcp_handler	*rtcp_handler;
 
 	int			ptime; // either from SDP or overridden
 
diff --git a/daemon/codec.c b/daemon/codec.c
index 38886faab..67c461824 100644
--- a/daemon/codec.c
+++ b/daemon/codec.c
@@ -6,6 +6,7 @@
 #include "rtplib.h"
 #include "codeclib.h"
 #include "ssrc.h"
+#include "rtcp.h"
 
 
 
@@ -138,6 +139,7 @@ void codec_handlers_update(struct call_media *receiver, struct call_media *sink)
 				NULL, __codec_handler_free);
 
 	MEDIA_CLEAR(receiver, TRANSCODE);
+	receiver->rtcp_handler = NULL;
 
 	// we go through the list of codecs that the receiver supports and compare it
 	// with the list of codecs supported by the sink. if the receiver supports
@@ -335,6 +337,8 @@ next:
 					STR_FMT(&pt->encoding));
 			l = __delete_receiver_codec(receiver, l);
 		}
+
+		receiver->rtcp_handler = rtcp_transcode_handler;
 	}
 }
 
@@ -368,16 +372,16 @@ void codec_handlers_free(struct call_media *m) {
 }
 
 
-void codec_add_raw_packet(struct media_packet *mp, const str *raw) {
+void codec_add_raw_packet(struct media_packet *mp) {
 	struct codec_packet *p = g_slice_alloc(sizeof(*p));
-	p->s = *raw;
+	p->s = mp->raw;
 	p->free_func = NULL;
 	g_queue_push_tail(&mp->packets_out, p);
 }
 static int handler_func_passthrough(struct codec_handler *h, struct call_media *media,
 		struct media_packet *mp)
 {
-	codec_add_raw_packet(mp, &mp->raw);
+	codec_add_raw_packet(mp);
 	return 0;
 }
 
@@ -500,7 +504,7 @@ static int __packet_encoded(encoder_t *enc, void *u1, void *u2) {
 		rh->m_pt = ch->handler->dest_pt.payload_type;
 		rh->seq_num = htons(ch->seq_out++);
 		rh->timestamp = htonl(enc->avpkt.pts + ch->ts_out);
-		rh->ssrc = mp->ssrc_out->ssrc_map_out;
+		rh->ssrc = htonl(mp->ssrc_in->ssrc_map_out);
 
 		// add to output queue
 		struct codec_packet *p = g_slice_alloc(sizeof(*p));
diff --git a/daemon/codec.h b/daemon/codec.h
index 3e3c6a584..4cdffe3e3 100644
--- a/daemon/codec.h
+++ b/daemon/codec.h
@@ -36,7 +36,7 @@ void codec_handlers_update(struct call_media *receiver, struct call_media *sink)
 struct codec_handler *codec_handler_get(struct call_media *, int payload_type);
 void codec_handlers_free(struct call_media *);
 
-void codec_add_raw_packet(struct media_packet *mp, const str *);
+void codec_add_raw_packet(struct media_packet *mp);
 void codec_packet_free(void *);
 
 void codec_rtp_payload_types(struct call_media *media, struct call_media *other_media,
diff --git a/daemon/media_socket.c b/daemon/media_socket.c
index f1021505a..27d0af5d4 100644
--- a/daemon/media_socket.c
+++ b/daemon/media_socket.c
@@ -60,13 +60,7 @@ struct intf_rr {
 struct packet_handler_ctx {
 	// inputs:
 	str s; // raw input packet
-	endpoint_t fsin; // source address of received packet
-	struct timeval tv; // timestamp when packet was received
-	struct stream_fd *sfd; // fd which received the packet
 
-	struct call *call; // sfd->call
-	struct packet_stream *stream; // sfd->stream
-	struct call_media *media; // stream->media
 	struct packet_stream *sink; // where to send output packets to (forward destination)
 	rewrite_func decrypt_func, encrypt_func; // handlers for decrypt/encrypt
 	rtcp_filter_func *rtcp_filter;
@@ -1136,31 +1130,38 @@ noop:
 static void __stream_ssrc(struct packet_stream *in_srtp, struct packet_stream *out_srtp, u_int32_t ssrc_bs,
 		struct ssrc_ctx **ssrc_in_p, struct ssrc_ctx **ssrc_out_p, struct ssrc_hash *ssrc_hash)
 {
-	u_int32_t ssrc = ntohl(ssrc_bs);
+	u_int32_t in_ssrc = ntohl(ssrc_bs);
+	u_int32_t out_ssrc;
 
 	// input direction
 	mutex_lock(&in_srtp->in_lock);
 
 	(*ssrc_in_p) = in_srtp->ssrc_in;
-	if (G_UNLIKELY(!(*ssrc_in_p) || (*ssrc_in_p)->parent->h.ssrc != ssrc)) {
+	if (G_UNLIKELY(!(*ssrc_in_p) || (*ssrc_in_p)->parent->h.ssrc != in_ssrc)) {
 		// SSRC mismatch - get the new entry
 		(*ssrc_in_p) = in_srtp->ssrc_in =
-			get_ssrc_ctx(ssrc, ssrc_hash, SSRC_DIR_INPUT);
+			get_ssrc_ctx(in_ssrc, ssrc_hash, SSRC_DIR_INPUT);
+
+		// might have created a new entry, which would have a new random
+		// ssrc_map_out. we don't need this if we're not transcoding
+		if (!MEDIA_ISSET(in_srtp->media, TRANSCODE))
+			(*ssrc_in_p)->ssrc_map_out = in_ssrc;
 	}
 
 	mutex_unlock(&in_srtp->in_lock);
 
-	if (MEDIA_ISSET(in_srtp->media, TRANSCODE))
-		ssrc = (*ssrc_in_p)->ssrc_map_out;
-
 	// out direction
+	out_ssrc = (*ssrc_in_p)->ssrc_map_out;
 	mutex_lock(&out_srtp->out_lock);
 
 	(*ssrc_out_p) = out_srtp->ssrc_out;
-	if (G_UNLIKELY(!(*ssrc_out_p) || (*ssrc_out_p)->parent->h.ssrc != ssrc)) {
+	if (G_UNLIKELY(!(*ssrc_out_p) || (*ssrc_out_p)->parent->h.ssrc != out_ssrc)) {
 		// SSRC mismatch - get the new entry
 		(*ssrc_out_p) = out_srtp->ssrc_out =
-			get_ssrc_ctx(ssrc, ssrc_hash, SSRC_DIR_OUTPUT);
+			get_ssrc_ctx(out_ssrc, ssrc_hash, SSRC_DIR_OUTPUT);
+
+		// reverse SSRC mapping
+		(*ssrc_out_p)->ssrc_map_out = in_ssrc;
 	}
 
 	mutex_unlock(&out_srtp->out_lock);
@@ -1170,20 +1171,20 @@ static void __stream_ssrc(struct packet_stream *in_srtp, struct packet_stream *o
 // returns: 0 = packet processed by other protocol hander; -1 = packet not handled, proceed;
 // 1 = same as 0, but stream can be kernelized
 static int media_demux_protocols(struct packet_handler_ctx *phc) {
-	if (MEDIA_ISSET(phc->media, DTLS) && is_dtls(&phc->s)) {
-		mutex_lock(&phc->stream->in_lock);
-		int ret = dtls(phc->stream, &phc->s, &phc->fsin);
-		mutex_unlock(&phc->stream->in_lock);
+	if (MEDIA_ISSET(phc->mp.media, DTLS) && is_dtls(&phc->s)) {
+		mutex_lock(&phc->mp.stream->in_lock);
+		int ret = dtls(phc->mp.stream, &phc->s, &phc->mp.fsin);
+		mutex_unlock(&phc->mp.stream->in_lock);
 		if (!ret)
 			return 0;
 	}
 
-	if (phc->media->ice_agent && is_stun(&phc->s)) {
-		int stun_ret = stun(&phc->s, phc->sfd, &phc->fsin);
+	if (phc->mp.media->ice_agent && is_stun(&phc->s)) {
+		int stun_ret = stun(&phc->s, phc->mp.sfd, &phc->mp.fsin);
 		if (!stun_ret)
 			return 0;
 		if (stun_ret == 1) {
-			call_media_state_machine(phc->media);
+			call_media_state_machine(phc->mp.media);
 			return 1;
 		}
 		else /* not an stun packet */
@@ -1197,33 +1198,33 @@ static int media_demux_protocols(struct packet_handler_ctx *phc) {
 #if RTP_LOOP_PROTECT
 // returns: 0 = ok, proceed; -1 = duplicate detected, drop packet
 static int media_loop_detect(struct packet_handler_ctx *phc) {
-	mutex_lock(&phc->stream->in_lock);
+	mutex_lock(&phc->mp.stream->in_lock);
 
 	for (int i = 0; i < RTP_LOOP_PACKETS; i++) {
-		if (phc->stream->lp_buf[i].len != phc->s.len)
+		if (phc->mp.stream->lp_buf[i].len != phc->s.len)
 			continue;
-		if (memcmp(phc->stream->lp_buf[i].buf, phc->s.s, MIN(phc->s.len, RTP_LOOP_PROTECT)))
+		if (memcmp(phc->mp.stream->lp_buf[i].buf, phc->s.s, MIN(phc->s.len, RTP_LOOP_PROTECT)))
 			continue;
 
 		__C_DBG("packet dupe");
-		if (phc->stream->lp_count >= RTP_LOOP_MAX_COUNT) {
+		if (phc->mp.stream->lp_count >= RTP_LOOP_MAX_COUNT) {
 			ilog(LOG_WARNING, "More than %d duplicate packets detected, dropping packet "
 					"to avoid potential loop", RTP_LOOP_MAX_COUNT);
-			mutex_unlock(&phc->stream->in_lock);
+			mutex_unlock(&phc->mp.stream->in_lock);
 			return -1;
 		}
 
-		phc->stream->lp_count++;
+		phc->mp.stream->lp_count++;
 		goto loop_ok;
 	}
 
 	/* not a dupe */
-	phc->stream->lp_count = 0;
-	phc->stream->lp_buf[phc->stream->lp_idx].len = phc->s.len;
-	memcpy(phc->stream->lp_buf[phc->stream->lp_idx].buf, phc->s.s, MIN(phc->s.len, RTP_LOOP_PROTECT));
-	phc->stream->lp_idx = (phc->stream->lp_idx + 1) % RTP_LOOP_PACKETS;
+	phc->mp.stream->lp_count = 0;
+	phc->mp.stream->lp_buf[phc->mp.stream->lp_idx].len = phc->s.len;
+	memcpy(phc->mp.stream->lp_buf[phc->mp.stream->lp_idx].buf, phc->s.s, MIN(phc->s.len, RTP_LOOP_PROTECT));
+	phc->mp.stream->lp_idx = (phc->mp.stream->lp_idx + 1) % RTP_LOOP_PACKETS;
 loop_ok:
-	mutex_unlock(&phc->stream->in_lock);
+	mutex_unlock(&phc->mp.stream->in_lock);
 
 	return 0;
 }
@@ -1235,18 +1236,18 @@ loop_ok:
 // sink is set to where to forward the packet to
 static void media_packet_rtcp_demux(struct packet_handler_ctx *phc)
 {
-	phc->in_srtp = phc->stream;
-	phc->sink = phc->stream->rtp_sink;
-	if (!phc->sink && PS_ISSET(phc->stream, RTCP)) {
-		phc->sink = phc->stream->rtcp_sink;
+	phc->in_srtp = phc->mp.stream;
+	phc->sink = phc->mp.stream->rtp_sink;
+	if (!phc->sink && PS_ISSET(phc->mp.stream, RTCP)) {
+		phc->sink = phc->mp.stream->rtcp_sink;
 		phc->rtcp = 1;
 	}
-	else if (phc->stream->rtcp_sink) {
-		int muxed_rtcp = rtcp_demux(&phc->s, phc->media);
+	else if (phc->mp.stream->rtcp_sink) {
+		int muxed_rtcp = rtcp_demux(&phc->s, phc->mp.media);
 		if (muxed_rtcp == 2) {
-			phc->sink = phc->stream->rtcp_sink;
+			phc->sink = phc->mp.stream->rtcp_sink;
 			phc->rtcp = 1;
-			phc->in_srtp = phc->stream->rtcp_sibling; // use RTCP SRTP context
+			phc->in_srtp = phc->mp.stream->rtcp_sibling; // use RTCP SRTP context
 		}
 	}
 	phc->out_srtp = phc->sink;
@@ -1259,9 +1260,9 @@ static void media_packet_rtp(struct packet_handler_ctx *phc)
 {
 	phc->payload_type = -1;
 
-	if (G_UNLIKELY(!phc->media->protocol))
+	if (G_UNLIKELY(!phc->mp.media->protocol))
 		return;
-	if (G_UNLIKELY(!phc->media->protocol->rtp))
+	if (G_UNLIKELY(!phc->mp.media->protocol->rtp))
 		return;
 
 	if (G_LIKELY(!phc->rtcp && !rtp_payload(&phc->mp.rtp, &phc->mp.payload, &phc->s))) {
@@ -1269,7 +1270,7 @@ static void media_packet_rtp(struct packet_handler_ctx *phc)
 
 		if (G_LIKELY(phc->out_srtp != NULL))
 			__stream_ssrc(phc->in_srtp, phc->out_srtp, phc->mp.rtp->ssrc, &phc->mp.ssrc_in,
-					&phc->mp.ssrc_out, phc->call->ssrc_hash);
+					&phc->mp.ssrc_out, phc->mp.call->ssrc_hash);
 
 		// check the payload type
 		// XXX redundant between SSRC handling and codec_handler stuff -> combine
@@ -1279,11 +1280,11 @@ static void media_packet_rtp(struct packet_handler_ctx *phc)
 
 		// XXX convert to array? or keep last pointer?
 		// XXX yet another hash table per payload type -> combine
-		struct rtp_stats *rtp_s = g_hash_table_lookup(phc->stream->rtp_stats, &phc->payload_type);
+		struct rtp_stats *rtp_s = g_hash_table_lookup(phc->mp.stream->rtp_stats, &phc->payload_type);
 		if (!rtp_s) {
 			ilog(LOG_WARNING | LOG_FLAG_LIMIT,
 					"RTP packet with unknown payload type %u received", phc->payload_type);
-			atomic64_inc(&phc->stream->stats.errors);
+			atomic64_inc(&phc->mp.stream->stats.errors);
 			atomic64_inc(&rtpe_statsps.errors);
 		}
 
@@ -1295,7 +1296,7 @@ static void media_packet_rtp(struct packet_handler_ctx *phc)
 	else if (phc->rtcp && !rtcp_payload(&phc->mp.rtcp, NULL, &phc->s)) {
 		if (G_LIKELY(phc->out_srtp != NULL))
 			__stream_ssrc(phc->in_srtp, phc->out_srtp, phc->mp.rtcp->ssrc, &phc->mp.ssrc_in,
-					&phc->mp.ssrc_out, phc->call->ssrc_hash);
+					&phc->mp.ssrc_out, phc->mp.call->ssrc_hash);
 	}
 }
 
@@ -1320,7 +1321,7 @@ static int media_packet_decrypt(struct packet_handler_ctx *phc)
 	 * 1 = forward and push update to redis */
 	int ret = 0;
 	if (phc->decrypt_func)
-		ret = phc->decrypt_func(&phc->s, phc->in_srtp, phc->sfd, &phc->fsin, &phc->tv, phc->mp.ssrc_in);
+		ret = phc->decrypt_func(&phc->s, phc->in_srtp, phc->mp.sfd, &phc->mp.fsin, &phc->mp.tv, phc->mp.ssrc_in);
 
 	mutex_unlock(&phc->in_srtp->in_lock);
 
@@ -1361,50 +1362,50 @@ static int media_packet_address_check(struct packet_handler_ctx *phc)
 	struct endpoint endpoint;
 	int ret = 0;
 
-	mutex_lock(&phc->stream->in_lock);
+	mutex_lock(&phc->mp.stream->in_lock);
 
 	/* we're OK to (potentially) use the source address of this packet as destination
 	 * in the other direction. */
 	/* if the other side hasn't been signalled yet, just forward the packet */
-	if (!PS_ISSET(phc->stream, FILLED)) {
-		__C_DBG("stream %s:%d not FILLED", sockaddr_print_buf(&phc->stream->endpoint.address),
-				phc->stream->endpoint.port);
+	if (!PS_ISSET(phc->mp.stream, FILLED)) {
+		__C_DBG("stream %s:%d not FILLED", sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+				phc->mp.stream->endpoint.port);
 		goto out;
 	}
 
 	/* do not pay attention to source addresses of incoming packets for asymmetric streams */
-	if (MEDIA_ISSET(phc->media, ASYMMETRIC))
-		PS_SET(phc->stream, CONFIRMED);
+	if (MEDIA_ISSET(phc->mp.media, ASYMMETRIC))
+		PS_SET(phc->mp.stream, CONFIRMED);
 
 	/* confirm sink for unidirectional streams in order to kernelize */
-	if (MEDIA_ISSET(phc->media, UNIDIRECTIONAL))
+	if (MEDIA_ISSET(phc->mp.media, UNIDIRECTIONAL))
 		PS_SET(phc->sink, CONFIRMED);
 
 	/* if we have already updated the endpoint in the past ... */
-	if (PS_ISSET(phc->stream, CONFIRMED)) {
+	if (PS_ISSET(phc->mp.stream, CONFIRMED)) {
 		/* see if we need to compare the source address with the known endpoint */
-		if (PS_ISSET2(phc->stream, STRICT_SOURCE, MEDIA_HANDOVER)) {
-			endpoint = phc->fsin;
-			mutex_lock(&phc->stream->out_lock);
+		if (PS_ISSET2(phc->mp.stream, STRICT_SOURCE, MEDIA_HANDOVER)) {
+			endpoint = phc->mp.fsin;
+			mutex_lock(&phc->mp.stream->out_lock);
 
-			int tmp = memcmp(&endpoint, &phc->stream->endpoint, sizeof(endpoint));
-			if (tmp && PS_ISSET(phc->stream, MEDIA_HANDOVER)) {
+			int tmp = memcmp(&endpoint, &phc->mp.stream->endpoint, sizeof(endpoint));
+			if (tmp && PS_ISSET(phc->mp.stream, MEDIA_HANDOVER)) {
 				/* out_lock remains locked */
-				ilog(LOG_INFO, "Peer address changed to %s", endpoint_print_buf(&phc->fsin));
+				ilog(LOG_INFO, "Peer address changed to %s", endpoint_print_buf(&phc->mp.fsin));
 				phc->unkernelize = 1;
 				phc->update = 1;
-				phc->stream->endpoint = phc->fsin;
+				phc->mp.stream->endpoint = phc->mp.fsin;
 				goto update_addr;
 			}
 
-			mutex_unlock(&phc->stream->out_lock);
+			mutex_unlock(&phc->mp.stream->out_lock);
 
-			if (tmp && PS_ISSET(phc->stream, STRICT_SOURCE)) {
+			if (tmp && PS_ISSET(phc->mp.stream, STRICT_SOURCE)) {
 				ilog(LOG_INFO, "Drop due to strict-source attribute; got %s:%d, expected %s:%d",
 					sockaddr_print_buf(&endpoint.address), endpoint.port,
-					sockaddr_print_buf(&phc->stream->endpoint.address),
-					phc->stream->endpoint.port);
-				atomic64_inc(&phc->stream->stats.errors);
+					sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+					phc->mp.stream->endpoint.port);
+				atomic64_inc(&phc->mp.stream->stats.errors);
 				ret = -1;
 				goto out;
 			}
@@ -1415,72 +1416,72 @@ static int media_packet_address_check(struct packet_handler_ctx *phc)
 
 	/* wait at least 3 seconds after last signal before committing to a particular
 	 * endpoint address */
-	if (!phc->call->last_signal || rtpe_now.tv_sec <= phc->call->last_signal + 3)
+	if (!phc->mp.call->last_signal || rtpe_now.tv_sec <= phc->mp.call->last_signal + 3)
 		goto update_peerinfo;
 
 	phc->kernelize = 1;
 	phc->update = 1;
 
-	ilog(LOG_INFO, "Confirmed peer address as %s", endpoint_print_buf(&phc->fsin));
+	ilog(LOG_INFO, "Confirmed peer address as %s", endpoint_print_buf(&phc->mp.fsin));
 
-	PS_SET(phc->stream, CONFIRMED);
+	PS_SET(phc->mp.stream, CONFIRMED);
 
 update_peerinfo:
-	mutex_lock(&phc->stream->out_lock);
-	endpoint = phc->stream->endpoint;
-	phc->stream->endpoint = phc->fsin;
-	if (memcmp(&endpoint, &phc->stream->endpoint, sizeof(endpoint)))
+	mutex_lock(&phc->mp.stream->out_lock);
+	endpoint = phc->mp.stream->endpoint;
+	phc->mp.stream->endpoint = phc->mp.fsin;
+	if (memcmp(&endpoint, &phc->mp.stream->endpoint, sizeof(endpoint)))
 		phc->update = 1;
 update_addr:
-	mutex_unlock(&phc->stream->out_lock);
+	mutex_unlock(&phc->mp.stream->out_lock);
 
 	/* check the destination address of the received packet against what we think our
 	 * local interface to use is */
-	if (phc->stream->selected_sfd && phc->sfd != phc->stream->selected_sfd) {
-		ilog(LOG_INFO, "Switching local interface to %s", endpoint_print_buf(&phc->sfd->socket.local));
-		phc->stream->selected_sfd = phc->sfd;
+	if (phc->mp.stream->selected_sfd && phc->mp.sfd != phc->mp.stream->selected_sfd) {
+		ilog(LOG_INFO, "Switching local interface to %s", endpoint_print_buf(&phc->mp.sfd->socket.local));
+		phc->mp.stream->selected_sfd = phc->mp.sfd;
 		phc->update = 1;
 	}
 
 out:
-	mutex_unlock(&phc->stream->in_lock);
+	mutex_unlock(&phc->mp.stream->in_lock);
 
 	return ret;
 }
 
 
 static void media_packet_kernel_check(struct packet_handler_ctx *phc) {
-	if (PS_ISSET(phc->stream, NO_KERNEL_SUPPORT)) {
-		__C_DBG("stream %s:%d NO_KERNEL_SUPPORT", sockaddr_print_buf(&phc->stream->endpoint.address), phc->stream->endpoint.port);
+	if (PS_ISSET(phc->mp.stream, NO_KERNEL_SUPPORT)) {
+		__C_DBG("stream %s:%d NO_KERNEL_SUPPORT", sockaddr_print_buf(&phc->mp.stream->endpoint.address), phc->mp.stream->endpoint.port);
 		return;
 	}
 
-	if (!PS_ISSET(phc->stream, CONFIRMED)) {
-		__C_DBG("stream %s:%d not CONFIRMED", sockaddr_print_buf(&phc->stream->endpoint.address),
-				phc->stream->endpoint.port);
+	if (!PS_ISSET(phc->mp.stream, CONFIRMED)) {
+		__C_DBG("stream %s:%d not CONFIRMED", sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+				phc->mp.stream->endpoint.port);
 		return;
 	}
 
 	if (!phc->sink) {
-		__C_DBG("sink is NULL for stream %s:%d", sockaddr_print_buf(&phc->stream->endpoint.address),
-				phc->stream->endpoint.port);
+		__C_DBG("sink is NULL for stream %s:%d", sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+				phc->mp.stream->endpoint.port);
 		return;
 	}
 
 	if (!PS_ISSET(phc->sink, CONFIRMED)) {
 		__C_DBG("sink not CONFIRMED for stream %s:%d",
-				sockaddr_print_buf(&phc->stream->endpoint.address),
-				phc->stream->endpoint.port);
+				sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+				phc->mp.stream->endpoint.port);
 		return;
 	}
 
 	if (!PS_ISSET(phc->sink, FILLED)) {
-		__C_DBG("sink not FILLED for stream %s:%d", sockaddr_print_buf(&phc->stream->endpoint.address),
-				phc->stream->endpoint.port);
+		__C_DBG("sink not FILLED for stream %s:%d", sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+				phc->mp.stream->endpoint.port);
 		return;
 	}
 
-	kernelize(phc->stream);
+	kernelize(phc->mp.stream);
 }
 
 
@@ -1490,13 +1491,14 @@ static int do_rtcp(struct packet_handler_ctx *phc) {
 	// XXX rewrite/consume for transcoding
 
 	GQueue rtcp_list = G_QUEUE_INIT;
-	if (rtcp_parse(&rtcp_list, &phc->s, phc->sfd, &phc->fsin, &phc->tv))
+	if (rtcp_parse(&rtcp_list, &phc->mp))
 		goto out;
 	if (phc->rtcp_filter)
-		if (phc->rtcp_filter(&phc->s, &rtcp_list))
+		if (phc->rtcp_filter(&phc->mp, &rtcp_list))
 			goto out;
 
-	codec_add_raw_packet(&phc->mp, &phc->s);
+	// queue for output
+	codec_add_raw_packet(&phc->mp);
 	ret = 0;
 
 out:
@@ -1529,20 +1531,20 @@ static int stream_packet(struct packet_handler_ctx *phc) {
  * always holds true */
 	int ret = 0, handler_ret = 0;
 
-	phc->call = phc->sfd->call;
+	phc->mp.call = phc->mp.sfd->call;
 
-	rwlock_lock_r(&phc->call->master_lock);
+	rwlock_lock_r(&phc->mp.call->master_lock);
 
-	phc->stream = phc->sfd->stream;
-	if (G_UNLIKELY(!phc->stream))
+	phc->mp.stream = phc->mp.sfd->stream;
+	if (G_UNLIKELY(!phc->mp.stream))
 		goto out;
-	__C_DBG("Handling packet on: %s:%d", sockaddr_print_buf(&phc->stream->endpoint.address),
-			phc->stream->endpoint.port);
+	__C_DBG("Handling packet on: %s:%d", sockaddr_print_buf(&phc->mp.stream->endpoint.address),
+			phc->mp.stream->endpoint.port);
 
 
-	phc->media = phc->stream->media;
+	phc->mp.media = phc->mp.stream->media;
 
-	if (!phc->stream->selected_sfd)
+	if (!phc->mp.stream->selected_sfd)
 		goto out;
 
 
@@ -1556,7 +1558,7 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 
 
 #if RTP_LOOP_PROTECT
-	if (MEDIA_ISSET(phc->media, LOOP_CHECK)) {
+	if (MEDIA_ISSET(phc->mp.media, LOOP_CHECK)) {
 		if (media_loop_detect(phc))
 			goto out;
 	}
@@ -1575,8 +1577,8 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 	if (G_UNLIKELY(!phc->sink || !phc->sink->selected_sfd || !phc->out_srtp
 				|| !phc->out_srtp->selected_sfd || !phc->in_srtp->selected_sfd))
 	{
-		ilog(LOG_WARNING, "RTP packet from %s discarded", endpoint_print_buf(&phc->fsin));
-		atomic64_inc(&phc->stream->stats.errors);
+		ilog(LOG_WARNING, "RTP packet from %s discarded", endpoint_print_buf(&phc->mp.fsin));
+		atomic64_inc(&phc->mp.stream->stats.errors);
 		atomic64_inc(&rtpe_statsps.errors);
 		goto out;
 	}
@@ -1585,19 +1587,21 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 	handler_ret = media_packet_decrypt(phc);
 
 	// If recording pcap dumper is set, then we record the call.
-	if (phc->call->recording)
-		dump_packet(phc->call->recording, phc->stream, &phc->s);
+	if (phc->mp.call->recording)
+		dump_packet(phc->mp.call->recording, phc->mp.stream, &phc->s);
+
+	// ready to process
+
+	phc->mp.raw = phc->s;
 
-	// RTCP detection is further up, so we could make this determination there
-	if (phc->mp.rtcp) {
+	if (phc->rtcp) {
 		if (do_rtcp(phc))
 			goto drop;
 	}
 	else {
-		struct codec_handler *transcoder = codec_handler_get(phc->media, phc->payload_type);
+		struct codec_handler *transcoder = codec_handler_get(phc->mp.media, phc->payload_type);
 		// this transfers the packet from 's' to 'packets_out'
-		phc->mp.raw = phc->s;
-		if (transcoder->func(transcoder, phc->media, &phc->mp))
+		if (transcoder->func(transcoder, phc->mp.media, &phc->mp))
 			goto drop;
 	}
 
@@ -1605,7 +1609,7 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 		handler_ret = media_packet_encrypt(phc);
 
 	if (phc->update) // for RTCP packet index updates
-		unkernelize(phc->stream);
+		unkernelize(phc->mp.stream);
 
 
 	int address_check = media_packet_address_check(phc);
@@ -1646,7 +1650,7 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 	if (ret == -1) {
 		ret = -errno;
                 ilog(LOG_DEBUG,"Error when sending message. Error: %s",strerror(errno));
-		atomic64_inc(&phc->stream->stats.errors);
+		atomic64_inc(&phc->mp.stream->stats.errors);
 		atomic64_inc(&rtpe_statsps.errors);
 		goto out;
 	}
@@ -1654,20 +1658,20 @@ static int stream_packet(struct packet_handler_ctx *phc) {
 drop:
 	ret = 0;
 	// XXX separate stats for received/sent
-	atomic64_inc(&phc->stream->stats.packets);
-	atomic64_add(&phc->stream->stats.bytes, phc->s.len);
-	atomic64_set(&phc->stream->last_packet, rtpe_now.tv_sec);
+	atomic64_inc(&phc->mp.stream->stats.packets);
+	atomic64_add(&phc->mp.stream->stats.bytes, phc->s.len);
+	atomic64_set(&phc->mp.stream->last_packet, rtpe_now.tv_sec);
 	atomic64_inc(&rtpe_statsps.packets);
 	atomic64_add(&rtpe_statsps.bytes, phc->s.len);
 
 out:
 	if (phc->unkernelize) {
-		stream_unconfirm(phc->stream);
-		stream_unconfirm(phc->stream->rtp_sink);
-		stream_unconfirm(phc->stream->rtcp_sink);
+		stream_unconfirm(phc->mp.stream);
+		stream_unconfirm(phc->mp.stream->rtp_sink);
+		stream_unconfirm(phc->mp.stream->rtcp_sink);
 	}
 
-	rwlock_unlock_r(&phc->call->master_lock);
+	rwlock_unlock_r(&phc->mp.call->master_lock);
 
 	g_queue_clear_full(&phc->mp.packets_out, codec_packet_free);
 
@@ -1698,10 +1702,10 @@ static void stream_fd_readable(int fd, void *p, uintptr_t u) {
 
 		struct packet_handler_ctx phc;
 		ZERO(phc);
-		phc.sfd = sfd;
+		phc.mp.sfd = sfd;
 
 		ret = socket_recvfrom_ts(&sfd->socket, buf + RTP_BUFFER_HEAD_ROOM, MAX_RTP_PACKET_SIZE,
-				&phc.fsin, &phc.tv);
+				&phc.mp.fsin, &phc.mp.tv);
 
 		if (ret < 0) {
 			if (errno == EINTR)
diff --git a/daemon/media_socket.h b/daemon/media_socket.h
index 0eeab20a4..a4405d6ba 100644
--- a/daemon/media_socket.h
+++ b/daemon/media_socket.h
@@ -15,7 +15,9 @@
 
 
 
-typedef int rtcp_filter_func(str *, GQueue *);
+struct media_packet;
+
+typedef int rtcp_filter_func(struct media_packet *, GQueue *);
 
 
 
@@ -73,6 +75,14 @@ struct stream_fd {
 };
 struct media_packet {
 	str raw;
+
+	endpoint_t fsin; // source address of received packet
+	struct timeval tv; // timestamp when packet was received
+	struct stream_fd *sfd; // fd which received the packet
+	struct call *call; // sfd->call
+	struct packet_stream *stream; // sfd->stream
+	struct call_media *media; // stream->media
+
 	struct rtp_header *rtp;
 	struct rtcp_packet *rtcp;
 	struct ssrc_ctx *ssrc_in, *ssrc_out; // SSRC contexts from in_srtp and out_srtp
diff --git a/daemon/rtcp.c b/daemon/rtcp.c
index c44ffcba0..00381b68b 100644
--- a/daemon/rtcp.c
+++ b/daemon/rtcp.c
@@ -226,9 +226,7 @@ struct rtcp_chain_element {
 // context to hold state variables
 struct rtcp_process_ctx {
 	// input
-	struct call *call;
-	struct call_media *media;
-	const struct timeval *received;
+	struct media_packet *mp;
 
 	// handler vars
 	union {
@@ -252,10 +250,10 @@ struct rtcp_process_ctx {
 struct rtcp_handler {
 	void (*init)(struct rtcp_process_ctx *);
 	void (*start)(struct rtcp_process_ctx *, struct call *);
-	void (*common)(struct rtcp_process_ctx *, const struct rtcp_packet *);
-	void (*sr)(struct rtcp_process_ctx *, const struct sender_report_packet *);
+	void (*common)(struct rtcp_process_ctx *, struct rtcp_packet *);
+	void (*sr)(struct rtcp_process_ctx *, struct sender_report_packet *);
 	void (*rr_list_start)(struct rtcp_process_ctx *, const struct rtcp_packet *);
-	void (*rr)(struct rtcp_process_ctx *, const struct report_block *);
+	void (*rr)(struct rtcp_process_ctx *, struct report_block *);
 	void (*rr_list_end)(struct rtcp_process_ctx *);
 	//void (*xr)(struct rtcp_process_ctx *, const struct rtcp_packet *, str *);
 	void (*sdes_list_start)(struct rtcp_process_ctx *, const struct source_description_packet *);
@@ -276,6 +274,7 @@ struct rtcp_handlers {
 	const struct rtcp_handler
 		*scratch,
 		*mos,
+		*transcode,
 		*logging,
 		*homer;
 };
@@ -283,25 +282,35 @@ struct rtcp_handlers {
 // log handler function prototypes
 
 // scratch area (prepare/parse packet)
-static void scratch_common(struct rtcp_process_ctx *, const struct rtcp_packet *);
-static void scratch_sr(struct rtcp_process_ctx *, const struct sender_report_packet *);
-static void scratch_rr(struct rtcp_process_ctx *, const struct report_block *);
+static void scratch_common(struct rtcp_process_ctx *, struct rtcp_packet *);
+static void scratch_sr(struct rtcp_process_ctx *, struct sender_report_packet *);
+static void scratch_rr(struct rtcp_process_ctx *, struct report_block *);
 static void scratch_xr_rr_time(struct rtcp_process_ctx *, const struct xr_rb_rr_time *);
 static void scratch_xr_dlrr(struct rtcp_process_ctx *, const struct xr_rb_dlrr *);
 static void scratch_xr_voip_metrics(struct rtcp_process_ctx *, const struct xr_rb_voip_metrics *);
 
 // MOS calculation / stats
-static void mos_sr(struct rtcp_process_ctx *, const struct sender_report_packet *);
-static void mos_rr(struct rtcp_process_ctx *, const struct report_block *);
+static void mos_sr(struct rtcp_process_ctx *, struct sender_report_packet *);
+static void mos_rr(struct rtcp_process_ctx *, struct report_block *);
 static void mos_xr_rr_time(struct rtcp_process_ctx *, const struct xr_rb_rr_time *);
 static void mos_xr_dlrr(struct rtcp_process_ctx *, const struct xr_rb_dlrr *);
 static void mos_xr_voip_metrics(struct rtcp_process_ctx *, const struct xr_rb_voip_metrics *);
 
+// RTCP translation for transcoding
+static void transcode_common(struct rtcp_process_ctx *, struct rtcp_packet *);
+static void transcode_rr(struct rtcp_process_ctx *, struct report_block *);
+static void transcode_sr(struct rtcp_process_ctx *, struct sender_report_packet *);
+
+// wrappers to enable dynamic transcoding
+static void transcode_common_wrap(struct rtcp_process_ctx *, struct rtcp_packet *);
+static void transcode_rr_wrap(struct rtcp_process_ctx *, struct report_block *);
+static void transcode_sr_wrap(struct rtcp_process_ctx *, struct sender_report_packet *);
+
 // homer functions
 static void homer_init(struct rtcp_process_ctx *);
-static void homer_sr(struct rtcp_process_ctx *, const struct sender_report_packet *);
+static void homer_sr(struct rtcp_process_ctx *, struct sender_report_packet *);
 static void homer_rr_list_start(struct rtcp_process_ctx *, const struct rtcp_packet *);
-static void homer_rr(struct rtcp_process_ctx *, const struct report_block *);
+static void homer_rr(struct rtcp_process_ctx *, struct report_block *);
 static void homer_rr_list_end(struct rtcp_process_ctx *);
 static void homer_sdes_list_start(struct rtcp_process_ctx *, const struct source_description_packet *);
 static void homer_sdes_item(struct rtcp_process_ctx *, const struct sdes_chunk *, const struct sdes_item *,
@@ -313,10 +322,10 @@ static void homer_finish(struct rtcp_process_ctx *, struct call *, const endpoin
 // syslog functions
 static void logging_init(struct rtcp_process_ctx *);
 static void logging_start(struct rtcp_process_ctx *, struct call *);
-static void logging_common(struct rtcp_process_ctx *, const struct rtcp_packet *);
+static void logging_common(struct rtcp_process_ctx *, struct rtcp_packet *);
 static void logging_sdes_list_start(struct rtcp_process_ctx *, const struct source_description_packet *);
-static void logging_sr(struct rtcp_process_ctx *, const struct sender_report_packet *);
-static void logging_rr(struct rtcp_process_ctx *, const struct report_block *);
+static void logging_sr(struct rtcp_process_ctx *, struct sender_report_packet *);
+static void logging_rr(struct rtcp_process_ctx *, struct report_block *);
 static void logging_xr_rb(struct rtcp_process_ctx *, const struct xr_report_block *);
 static void logging_xr_rr_time(struct rtcp_process_ctx *, const struct xr_rb_rr_time *);
 static void logging_xr_dlrr(struct rtcp_process_ctx *, const struct xr_rb_dlrr *);
@@ -343,6 +352,16 @@ static struct rtcp_handler mos_handlers = {
 	.xr_dlrr = mos_xr_dlrr,
 	.xr_voip_metrics = mos_xr_voip_metrics,
 };
+static struct rtcp_handler transcode_handlers = {
+	.common = transcode_common,
+	.rr = transcode_rr,
+	.sr = transcode_sr,
+};
+static struct rtcp_handler transcode_handlers_wrap = {
+	.common = transcode_common_wrap,
+	.rr = transcode_rr_wrap,
+	.sr = transcode_sr_wrap,
+};
 static struct rtcp_handler log_handlers = {
 	.init = logging_init,
 	.start = logging_start,
@@ -374,6 +393,7 @@ static struct rtcp_handler homer_handlers = {
 static struct rtcp_handlers rtcp_handlers = {
 	.scratch = &scratch_handlers,
 	.mos = &mos_handlers,
+	.transcode = &transcode_handlers_wrap,
 	// remainder is variable
 };
 
@@ -383,11 +403,13 @@ static struct rtcp_handlers rtcp_handlers = {
 			rtcp_handlers.type->func(log_ctx, ##__VA_ARGS__); \
 	} while (0)
 // macro to call all function handlers in one go
+// order is important
 #define CAH(func, ...) do { \
-		CH(func, scratch, ##__VA_ARGS__); \
-		CH(func, mos, ##__VA_ARGS__); \
-		CH(func, logging, ##__VA_ARGS__); \
-		CH(func, homer, ##__VA_ARGS__); \
+		CH(func, scratch, ##__VA_ARGS__); /* first parse out the values into scratch area */ \
+		CH(func, mos, ##__VA_ARGS__); /* process for MOS calculation */ \
+		CH(func, logging, ##__VA_ARGS__); /* log packets to syslog */ \
+		CH(func, homer, ##__VA_ARGS__); /* send contents to homer */ \
+		CH(func, transcode, ##__VA_ARGS__); /* translate for transcoding */ \
 	} while (0)
 
 
@@ -448,6 +470,11 @@ static const int min_xr_packet_sizes[] = {
 
 
 
+struct rtcp_handler *rtcp_transcode_handler = &transcode_handlers;
+
+
+
+
 
 
 static struct rtcp_header *rtcp_length_check(str *s, size_t min_len, unsigned int *len_p) {
@@ -617,15 +644,12 @@ void rtcp_list_free(GQueue *q) {
 
 
 
-int rtcp_parse(GQueue *q, const str *_s, struct stream_fd *sfd, const endpoint_t *src,
-		const struct timeval *tv)
-{
+int rtcp_parse(GQueue *q, struct media_packet *mp) {
 	struct rtcp_header *hdr;
 	struct rtcp_chain_element *el;
 	rtcp_handler_func func;
-	str s = *_s;
-	struct call *c = sfd->call;
-	struct call_media *m = sfd->stream->media;
+	str s = mp->raw;
+	struct call *c = mp->call;
 	struct rtcp_process_ctx log_ctx_s,
 				*log_ctx;
 	unsigned int len;
@@ -633,9 +657,7 @@ int rtcp_parse(GQueue *q, const str *_s, struct stream_fd *sfd, const endpoint_t
 	int min_packet_size;
 
 	ZERO(log_ctx_s);
-	log_ctx_s.call = c;
-	log_ctx_s.media = m;
-	log_ctx_s.received = tv;
+	log_ctx_s.mp = mp;
 
 	log_ctx = &log_ctx_s;
 
@@ -687,25 +709,25 @@ next:
 			abort();
 	}
 
-	CAH(finish, c, src, &sfd->socket.local, tv);
+	CAH(finish, c, &mp->fsin, &mp->sfd->socket.local, &mp->tv);
 	CAH(destroy);
 
 	return 0;
 
 error:
-	CAH(finish, c, src, &sfd->socket.local, tv);
+	CAH(finish, c, &mp->fsin, &mp->sfd->socket.local, &mp->tv);
 	CAH(destroy);
 	rtcp_list_free(q);
 	return -1;
 }
 
-int rtcp_avpf2avp_filter(str *s, GQueue *rtcp_list) {
+int rtcp_avpf2avp_filter(struct media_packet *mp, GQueue *rtcp_list) {
 	GList *l;
 	struct rtcp_chain_element *el;
 	void *start;
 	unsigned int removed, left;
 
-	left = s->len;
+	left = mp->raw.len;
 	removed = 0;
 	for (l = rtcp_list->head; l; l = l->next) {
 		el = l->data;
@@ -724,8 +746,8 @@ int rtcp_avpf2avp_filter(str *s, GQueue *rtcp_list) {
 		}
 	}
 
-	s->len -= removed;
-	if (!s->len)
+	mp->raw.len -= removed;
+	if (!mp->raw.len)
 		return -1;
 
 	return 0;
@@ -884,10 +906,10 @@ static void str_sanitize(GString *s) {
 
 
 
-static void scratch_common(struct rtcp_process_ctx *ctx, const struct rtcp_packet *common) {
+static void scratch_common(struct rtcp_process_ctx *ctx, struct rtcp_packet *common) {
 	ctx->scratch_common_ssrc = htonl(common->ssrc);
 }
-static void scratch_rr(struct rtcp_process_ctx *ctx, const struct report_block *rr) {
+static void scratch_rr(struct rtcp_process_ctx *ctx, struct report_block *rr) {
 	ctx->scratch.rr = (struct ssrc_receiver_report) {
 		.from = ctx->scratch_common_ssrc,
 		.ssrc = htonl(rr->ssrc),
@@ -899,7 +921,7 @@ static void scratch_rr(struct rtcp_process_ctx *ctx, const struct report_block *
 	};
 	ctx->scratch.rr.packets_lost = (rr->number_lost[0] << 16) | (rr->number_lost[1] << 8) | rr->number_lost[2];
 }
-static void scratch_sr(struct rtcp_process_ctx *ctx, const struct sender_report_packet *sr) {
+static void scratch_sr(struct rtcp_process_ctx *ctx, struct sender_report_packet *sr) {
 	ctx->scratch.sr = (struct ssrc_sender_report) {
 		.ssrc = ctx->scratch_common_ssrc,
 		.ntp_msw = ntohl(sr->ntp_msw),
@@ -958,7 +980,7 @@ static void homer_init(struct rtcp_process_ctx *ctx) {
 	ctx->json = g_string_new("{ ");
 	ctx->json_init_len = ctx->json->len;
 }
-static void homer_sr(struct rtcp_process_ctx *ctx, const struct sender_report_packet *sr) {
+static void homer_sr(struct rtcp_process_ctx *ctx, struct sender_report_packet *sr) {
 	g_string_append_printf(ctx->json, "\"sender_information\":{\"ntp_timestamp_sec\":%u,"
 	"\"ntp_timestamp_usec\":%u,\"octets\":%u,\"rtp_timestamp\":%u, \"packets\":%u},",
 		ctx->scratch.sr.ntp_msw,
@@ -973,7 +995,7 @@ static void homer_rr_list_start(struct rtcp_process_ctx *ctx, const struct rtcp_
 		common->header.pt,
 		common->header.count);
 }
-static void homer_rr(struct rtcp_process_ctx *ctx, const struct report_block *rr) {
+static void homer_rr(struct rtcp_process_ctx *ctx, struct report_block *rr) {
 	g_string_append_printf(ctx->json, "{\"source_ssrc\":%u,"
 	    "\"highest_seq_no\":%u,\"fraction_lost\":%u,\"ia_jitter\":%u,"
 	    "\"packets_lost\":%u,\"lsr\":%u,\"dlsr\":%u},",
@@ -1056,7 +1078,7 @@ static void logging_start(struct rtcp_process_ctx *ctx, struct call *c) {
 	g_string_append_printf(ctx->log, "["STR_FORMAT"] ", STR_FMT(&c->callid));
 	ctx->log_init_len = ctx->log->len;
 }
-static void logging_common(struct rtcp_process_ctx *ctx, const struct rtcp_packet *common) {
+static void logging_common(struct rtcp_process_ctx *ctx, struct rtcp_packet *common) {
 	g_string_append_printf(ctx->log,"version=%u, padding=%u, count=%u, payloadtype=%u, length=%u, ssrc=%u, ",
 		common->header.version,
 		common->header.p,
@@ -1073,7 +1095,7 @@ static void logging_sdes_list_start(struct rtcp_process_ctx *ctx, const struct s
 		sdes->header.pt,
 		ntohs(sdes->header.length));
 }
-static void logging_sr(struct rtcp_process_ctx *ctx, const struct sender_report_packet *sr) {
+static void logging_sr(struct rtcp_process_ctx *ctx, struct sender_report_packet *sr) {
 	g_string_append_printf(ctx->log,"ntp_sec=%u, ntp_fractions=%u, rtp_ts=%u, sender_packets=%u, " \
 			"sender_bytes=%u, ",
 		ctx->scratch.sr.ntp_msw,
@@ -1082,7 +1104,7 @@ static void logging_sr(struct rtcp_process_ctx *ctx, const struct sender_report_
 		ctx->scratch.sr.packet_count,
 		ctx->scratch.sr.octet_count);
 }
-static void logging_rr(struct rtcp_process_ctx *ctx, const struct report_block *rr) {
+static void logging_rr(struct rtcp_process_ctx *ctx, struct report_block *rr) {
 	    g_string_append_printf(ctx->log,"ssrc=%u, fraction_lost=%u, packet_loss=%u, last_seq=%u, jitter=%u, last_sr=%u, delay_since_last_sr=%u, ",
 			ctx->scratch.rr.ssrc,
 			rr->fraction_lost,
@@ -1179,20 +1201,80 @@ static void logging_destroy(struct rtcp_process_ctx *ctx) {
 
 
 
-static void mos_sr(struct rtcp_process_ctx *ctx, const struct sender_report_packet *sr) {
-	ssrc_sender_report(ctx->media, &ctx->scratch.sr, ctx->received);
+static void mos_sr(struct rtcp_process_ctx *ctx, struct sender_report_packet *sr) {
+	ssrc_sender_report(ctx->mp->media, &ctx->scratch.sr, &ctx->mp->tv);
 }
-static void mos_rr(struct rtcp_process_ctx *ctx, const struct report_block *rr) {
-	ssrc_receiver_report(ctx->media, &ctx->scratch.rr, ctx->received);
+static void mos_rr(struct rtcp_process_ctx *ctx, struct report_block *rr) {
+	ssrc_receiver_report(ctx->mp->media, &ctx->scratch.rr, &ctx->mp->tv);
 }
 static void mos_xr_rr_time(struct rtcp_process_ctx *ctx, const struct xr_rb_rr_time *rr) {
-	ssrc_receiver_rr_time(ctx->media, &ctx->scratch.xr_rr, ctx->received);
+	ssrc_receiver_rr_time(ctx->mp->media, &ctx->scratch.xr_rr, &ctx->mp->tv);
 }
 static void mos_xr_dlrr(struct rtcp_process_ctx *ctx, const struct xr_rb_dlrr *dlrr) {
-	ssrc_receiver_dlrr(ctx->media, &ctx->scratch.xr_dlrr, ctx->received);
+	ssrc_receiver_dlrr(ctx->mp->media, &ctx->scratch.xr_dlrr, &ctx->mp->tv);
 }
 static void mos_xr_voip_metrics(struct rtcp_process_ctx *ctx, const struct xr_rb_voip_metrics *rb_voip_mtc) {
-	ssrc_voip_metrics(ctx->media, &ctx->scratch.xr_vm, ctx->received);
+	ssrc_voip_metrics(ctx->mp->media, &ctx->scratch.xr_vm, &ctx->mp->tv);
+}
+
+
+
+
+static void transcode_common(struct rtcp_process_ctx *ctx, struct rtcp_packet *common) {
+	assert(ctx->scratch_common_ssrc == ctx->mp->ssrc_in->parent->h.ssrc);
+	common->ssrc = htonl(ctx->mp->ssrc_in->ssrc_map_out);
+}
+static void transcode_rr(struct rtcp_process_ctx *ctx, struct report_block *rr) {
+	assert(ctx->scratch.rr.from == ctx->mp->ssrc_in->parent->h.ssrc);
+
+	// reverse SSRC mapping
+	struct ssrc_ctx *map_ctx = get_ssrc_ctx(ctx->scratch.rr.ssrc, ctx->mp->call->ssrc_hash,
+			SSRC_DIR_OUTPUT);
+	rr->ssrc = htonl(map_ctx->ssrc_map_out);
+
+//	ilog(LOG_DEBUG, "transcode_rr: from ssrc %x about %x "
+//			"ssrc_in %x ssrc_in-map %x ssrc_out %x ssrc_out-map %x "
+//			"map_ctx %x map_ctx-map %x",
+//			ctx->scratch.rr.from,
+//			ctx->scratch.rr.ssrc,
+//			ctx->mp->ssrc_in->parent->h.ssrc,
+//			ctx->mp->ssrc_in->ssrc_map_out,
+//			ctx->mp->ssrc_out->parent->h.ssrc,
+//			ctx->mp->ssrc_out->ssrc_map_out,
+//			map_ctx->parent->h.ssrc,
+//			map_ctx->ssrc_map_out);
+
+	// translate ctx->scratch.rr.from to ctx->mp->ssrc_in->ssrc_map_out - done by transcode_common
+}
+static void transcode_sr(struct rtcp_process_ctx *ctx, struct sender_report_packet *sr) {
+	assert(ctx->scratch.sr.ssrc == ctx->mp->ssrc_in->parent->h.ssrc);
+
+//	ilog(LOG_DEBUG, "transcode_sr: ssrc %x ssrc_in %x ssrc_in-map %x ssrc_out %x ssrc_out-map %x",
+//			ctx->scratch.sr.ssrc,
+//			ctx->mp->ssrc_in->parent->h.ssrc,
+//			ctx->mp->ssrc_in->ssrc_map_out,
+//			ctx->mp->ssrc_out->parent->h.ssrc,
+//			ctx->mp->ssrc_out->ssrc_map_out);
+//
+	// translate ctx->scratch.sr.ssrc to ctx->mp->ssrc_in->ssrc_map_out - done by transcode_common
+}
+
+
+
+static void transcode_common_wrap(struct rtcp_process_ctx *ctx, struct rtcp_packet *common) {
+	if (!ctx->mp->media->rtcp_handler)
+		return;
+	ctx->mp->media->rtcp_handler->common(ctx, common);
+}
+static void transcode_rr_wrap(struct rtcp_process_ctx *ctx, struct report_block *rr) {
+	if (!ctx->mp->media->rtcp_handler)
+		return;
+	ctx->mp->media->rtcp_handler->rr(ctx, rr);
+}
+static void transcode_sr_wrap(struct rtcp_process_ctx *ctx, struct sender_report_packet *sr) {
+	if (!ctx->mp->media->rtcp_handler)
+		return;
+	ctx->mp->media->rtcp_handler->sr(ctx, sr);
 }
 
 
diff --git a/daemon/rtcp.h b/daemon/rtcp.h
index 480dd8ed3..ecbce3b8d 100644
--- a/daemon/rtcp.h
+++ b/daemon/rtcp.h
@@ -10,15 +10,25 @@
 struct crypto_context;
 struct rtcp_packet;
 struct ssrc_ctx;
+struct rtcp_handler;
 
 
+struct rtcp_parse_ctx {
+	struct call *call;
+	struct call_media *media;
+	const struct timeval *received;
+};
+
+
+extern struct rtcp_handler *rtcp_transcode_handler;
+
 
 int rtcp_avp2savp(str *, struct crypto_context *, struct ssrc_ctx *);
 int rtcp_savp2avp(str *, struct crypto_context *, struct ssrc_ctx *);
 
 int rtcp_payload(struct rtcp_packet **out, str *p, const str *s);
 
-int rtcp_parse(GQueue *q, const str *, struct stream_fd *sfd, const endpoint_t *, const struct timeval *);
+int rtcp_parse(GQueue *q, struct media_packet *);
 void rtcp_list_free(GQueue *q);
 
 rtcp_filter_func rtcp_avpf2avp_filter;
diff --git a/daemon/ssrc.c b/daemon/ssrc.c
index 3edce4467..8c6780d67 100644
--- a/daemon/ssrc.c
+++ b/daemon/ssrc.c
@@ -102,7 +102,7 @@ restart:
 
 	while (G_UNLIKELY(ht->q.length > 20)) { // arbitrary limit
 		struct ssrc_entry *old_ent = g_queue_pop_head(&ht->q);
-		ilog(LOG_DEBUG, "SSRC hash table exceeded size limit (trying to add %u) - deleting SSRC %u",
+		ilog(LOG_DEBUG, "SSRC hash table exceeded size limit (trying to add %x) - deleting SSRC %x",
 				ssrc, old_ent->ssrc);
 		g_hash_table_remove(ht->ht, &old_ent->ssrc);
 		g_atomic_pointer_set(&ht->cache, NULL);
@@ -236,7 +236,7 @@ found:;
 	mutex_unlock(&e->h.lock);
 
 	rtt -= (long long) delay * 1000000LL / 65536LL;
-	ilog(LOG_DEBUG, "Calculated round-trip time for %u is %lli us", ssrc, rtt);
+	ilog(LOG_DEBUG, "Calculated round-trip time for %x is %lli us", ssrc, rtt);
 
 	if (rtt <= 0 || rtt > 10000000) {
 		ilog(LOG_DEBUG, "Invalid RTT - discarding");
@@ -260,7 +260,7 @@ void ssrc_sender_report(struct call_media *m, const struct ssrc_sender_report *s
 
 	seri->report = *sr;
 
-	ilog(LOG_DEBUG, "SR from %u: RTP TS %u PC %u OC %u NTP TS %u/%u=%f",
+	ilog(LOG_DEBUG, "SR from %x: RTP TS %u PC %u OC %u NTP TS %u/%u=%f",
 			sr->ssrc, sr->timestamp, sr->packet_count, sr->octet_count,
 			sr->ntp_msw, sr->ntp_lsw, seri->time_item.ntp_ts);
 
@@ -271,7 +271,7 @@ void ssrc_receiver_report(struct call_media *m, const struct ssrc_receiver_repor
 {
 	struct call *c = m->call;
 
-	ilog(LOG_DEBUG, "RR from %u about %u: FL %u TL %u HSR %u J %u LSR %u DLSR %u",
+	ilog(LOG_DEBUG, "RR from %x about %x: FL %u TL %u HSR %u J %u LSR %u DLSR %u",
 			rr->from, rr->ssrc, rr->fraction_lost, rr->packets_lost,
 			rr->high_seq_received, rr->jitter, rr->lsr, rr->dlsr);
 
@@ -299,7 +299,7 @@ void ssrc_receiver_report(struct call_media *m, const struct ssrc_receiver_repor
 		goto out_nl;
 	}
 	unsigned int jitter = rpt->clock_rate ? (rr->jitter * 1000 / rpt->clock_rate) : rr->jitter;
-	ilog(LOG_DEBUG, "Calculated jitter for %u is %u ms", rr->ssrc, jitter);
+	ilog(LOG_DEBUG, "Calculated jitter for %x is %u ms", rr->ssrc, jitter);
 
 	ilog(LOG_DEBUG, "Adding opposide side RTT of %u us", other_e->last_rtt);
 
@@ -312,7 +312,7 @@ void ssrc_receiver_report(struct call_media *m, const struct ssrc_receiver_repor
 	};
 
 	mos_calc(ssb);
-	ilog(LOG_DEBUG, "Calculated MOS from RR for %u is %.1f", rr->from, (double) ssb->mos / 10.0);
+	ilog(LOG_DEBUG, "Calculated MOS from RR for %x is %.1f", rr->from, (double) ssb->mos / 10.0);
 
 	// got a new stats block, add it to reporting ssrc
 	mutex_lock(&other_e->h.lock);
@@ -358,7 +358,7 @@ void ssrc_receiver_rr_time(struct call_media *m, const struct ssrc_xr_rr_time *r
 	if (!srti)
 		return;
 
-	ilog(LOG_DEBUG, "XR RR TIME from %u: NTP TS %u/%u=%f",
+	ilog(LOG_DEBUG, "XR RR TIME from %x: NTP TS %u/%u=%f",
 			rr->ssrc,
 			rr->ntp_msw, rr->ntp_lsw, srti->time_item.ntp_ts);
 
@@ -368,7 +368,7 @@ void ssrc_receiver_rr_time(struct call_media *m, const struct ssrc_xr_rr_time *r
 void ssrc_receiver_dlrr(struct call_media *m, const struct ssrc_xr_dlrr *dlrr,
 		const struct timeval *tv)
 {
-	ilog(LOG_DEBUG, "XR DLRR from %u about %u: LRR %u DLRR %u",
+	ilog(LOG_DEBUG, "XR DLRR from %x about %x: LRR %u DLRR %u",
 			dlrr->from, dlrr->ssrc,
 			dlrr->lrr, dlrr->dlrr);
 
@@ -379,7 +379,7 @@ void ssrc_receiver_dlrr(struct call_media *m, const struct ssrc_xr_dlrr *dlrr,
 void ssrc_voip_metrics(struct call_media *m, const struct ssrc_xr_voip_metrics *vm,
 		const struct timeval *tv)
 {
-	ilog(LOG_DEBUG, "XR VM from %u about %u: LR %u DR %u BD %u GD %u BDu %u GDu %u RTD %u "
+	ilog(LOG_DEBUG, "XR VM from %x about %x: LR %u DR %u BD %u GD %u BDu %u GDu %u RTD %u "
 			"ESD %u SL %u NL %u RERL %u GMin %u R %u eR %u MOSL %u MOSC %u RX %u "
 			"JBn %u JBm %u JBam %u",
 			vm->from, vm->ssrc,
diff --git a/perl/NGCP/Rtpclient/RTP.pm b/perl/NGCP/Rtpclient/RTP.pm
index 7889b8194..5cf0cd3d7 100644
--- a/perl/NGCP/Rtpclient/RTP.pm
+++ b/perl/NGCP/Rtpclient/RTP.pm
@@ -66,7 +66,7 @@ sub input {
 
 	my ($vpxcc, $pt, $seq, $ts, $ssrc, $payload) = unpack("CCnNN a*", $packet);
 	$vpxcc == 0x80 or die;
-	$pt == 0 or die;
+	#$pt == 0 or die;
 
 	my $remote = ($self->{other_ssrcs}->{$ssrc} //= {
 			ssrc => $ssrc,
diff --git a/perl/NGCP/Rtpengine/Test.pm b/perl/NGCP/Rtpengine/Test.pm
index 5808614f2..a439ed219 100644
--- a/perl/NGCP/Rtpengine/Test.pm
+++ b/perl/NGCP/Rtpengine/Test.pm
@@ -372,10 +372,11 @@ sub _input {
 		$$input eq $exp or die;
 	}
 	$self->{media_packets_received}->[$component]++;
-	$$input = '';
 
 	$self->{client_components}->[$component] and
-		$self->{client_components}->[$component]->input($exp);
+		$self->{client_components}->[$component]->input($$input);
+
+	$$input = '';
 }
 
 sub _timer {