diff --git a/go.mod b/go.mod
index 51fa8cd..7ac38aa 100644
--- a/go.mod
+++ b/go.mod
@@ -3,9 +3,9 @@ module github.com/Monibuca/plugin-rtsp/v3
 go 1.16
 
 require (
-	github.com/Monibuca/engine/v3 v3.2.0
-	github.com/Monibuca/utils/v3 v3.0.0
-	github.com/pion/rtp v1.6.5
+	github.com/Monibuca/engine/v3 v3.3.0
+	github.com/Monibuca/utils/v3 v3.0.2
+	github.com/pion/rtp v1.7.1
 	github.com/teris-io/shortid v0.0.0-20201117134242-e59966efd125
-	golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c // indirect
+	golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 // indirect
 )
diff --git a/go.sum b/go.sum
index b881c10..2342c7e 100644
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,13 @@ github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/Monibuca/engine/v3 v3.2.0 h1:gAaw/5NFKvC1w7e1xP4IddP5gdC7Puz75hwwoZmzEeE=
 github.com/Monibuca/engine/v3 v3.2.0/go.mod h1:yz6cssED2VlYu+g/LrxseBB9pcvsLM/o2QXa4gVY650=
+github.com/Monibuca/engine/v3 v3.3.0 h1:7zwYsLEHdeVZy6+JjVlaDhl/asr0HG6jirBL4uynj0s=
+github.com/Monibuca/engine/v3 v3.3.0/go.mod h1:odyqD/VTQDN4qgzajsgn7kW7MWDIzTHt+j+BcI8i+4g=
 github.com/Monibuca/utils/v3 v3.0.0 h1:i8qCXQPQpRPgjuXKu5C2PYiL5LYzB6GW4xE162mB2ug=
 github.com/Monibuca/utils/v3 v3.0.0/go.mod h1:RpNS95gapWs6gimwh8Xn2x72FN5tO7Powabj7dTFyvE=
+github.com/Monibuca/utils/v3 v3.0.1/go.mod h1:RpNS95gapWs6gimwh8Xn2x72FN5tO7Powabj7dTFyvE=
+github.com/Monibuca/utils/v3 v3.0.2 h1:n2vr67DHanav8wBC9IENk8xrKzeGJnBsxYUu69s8TrQ=
+github.com/Monibuca/utils/v3 v3.0.2/go.mod h1:RpNS95gapWs6gimwh8Xn2x72FN5tO7Powabj7dTFyvE=
 github.com/cnotch/apirouter v0.0.0-20200731232942-89e243a791f3/go.mod h1:5deJPLON/x/s2dLOQfuKS0lenhOIT4xX0pvtN/OEIuY=
 github.com/cnotch/ipchub v1.1.0 h1:hH0lh2mU3AZXPiqMwA0pdtqrwo7PFIMRGush9OobMUs=
 github.com/cnotch/ipchub v1.1.0/go.mod h1:2PbeBs2q2VxxTVCn1eYCDwpAWuVXbq1+N0FU7GimOH4=
@@ -40,6 +45,8 @@ github.com/pion/randutil v0.1.0/go.mod h1:XcJrSMMbbMRhASFVOlj/5hQial/Y8oH/HVo7TB
 github.com/pion/rtp v1.6.2/go.mod h1:bDb5n+BFZxXx0Ea7E5qe+klMuqiBrP+w8XSjiWtCUko=
 github.com/pion/rtp v1.6.5 h1:o2cZf8OascA5HF/b0PAbTxRKvOWxTQxWYt7SlToxFGI=
 github.com/pion/rtp v1.6.5/go.mod h1:bDb5n+BFZxXx0Ea7E5qe+klMuqiBrP+w8XSjiWtCUko=
+github.com/pion/rtp v1.7.1 h1:hCaxfVgPGt13eF/Tu9RhVn04c+dAcRZmhdDWqUE13oY=
+github.com/pion/rtp v1.7.1/go.mod h1:bDb5n+BFZxXx0Ea7E5qe+klMuqiBrP+w8XSjiWtCUko=
 github.com/pixelbender/go-sdp v1.1.0/go.mod h1:6IBlz9+BrUHoFTea7gcp4S54khtOhjCW/nVDLhmZBAs=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -68,6 +75,8 @@ golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK8p3i2/krTr0H1rg74I=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 h1:siQdpVirKtzPhKl3lZWozZraCFObP8S1v6PRp0bLrtU=
+golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
diff --git a/session.go b/session.go
index 9ad1fd7..fb2ed49 100644
--- a/session.go
+++ b/session.go
@@ -286,12 +286,12 @@ func (session *RTSP) handleRequest(req *Request) {
 					at, vt := session.UDPClient.AT, session.UDPClient.VT
 					if vt != nil {
 						var st uint32
-						onVideo := func(pack VideoPack) {
+						onVideo := func(ts uint32, pack *VideoPack) {
 							if session.UDPClient == nil {
 								return
 							}
 							for _, nalu := range pack.NALUs {
-								for _, pack := range session.UDPClient.VPacketizer.Packetize(nalu, (pack.Timestamp-st)*90) {
+								for _, pack := range session.UDPClient.VPacketizer.Packetize(nalu, (ts-st)*90) {
 									p := &RTPPack{
 										Type:   RTP_TYPE_VIDEO,
 										Packet: *pack,
@@ -300,23 +300,23 @@ func (session *RTSP) handleRequest(req *Request) {
 									session.SendRTP(p)
 								}
 							}
-							st = pack.Timestamp
+							st = ts
 						}
-						sub.OnVideo = func(pack VideoPack) {
-							if st = pack.Timestamp; st != 0 {
+						sub.OnVideo = func(ts uint32, pack *VideoPack) {
+							if st = ts; st != 0 {
 								sub.OnVideo = onVideo
 							}
-							onVideo(pack)
+							onVideo(ts, pack)
 						}
 					}
 					if at != nil {
 						tb := uint32(at.SoundRate / 1000)
 						var st uint32
-						onAudio := func(pack AudioPack) {
+						onAudio := func(ts uint32, pack *AudioPack) {
 							if session.UDPClient == nil {
 								return
 							}
-							for _, pack := range session.UDPClient.APacketizer.Packetize(pack.Payload, (pack.Timestamp-st)*tb) {
+							for _, pack := range session.UDPClient.APacketizer.Packetize(pack.Payload, (ts-st)*tb) {
 								p := &RTPPack{
 									Type:   RTP_TYPE_VIDEO,
 									Packet: *pack,
@@ -324,13 +324,13 @@ func (session *RTSP) handleRequest(req *Request) {
 								p.Raw, _ = p.Marshal()
 								session.SendRTP(p)
 							}
-							st = pack.Timestamp
+							st = ts
 						}
-						sub.OnAudio = func(pack AudioPack) {
-							if st = pack.Timestamp; st != 0 {
+						sub.OnAudio = func(ts uint32, pack *AudioPack) {
+							if st = ts; st != 0 {
 								sub.OnAudio = onAudio
 							}
-							onAudio(pack)
+							onAudio(ts, pack)
 						}
 					}
 					go sub.Play(at, vt)