diff --git a/go.mod b/go.mod
index 7fd3914..f3f09b1 100644
--- a/go.mod
+++ b/go.mod
@@ -13,12 +13,13 @@ require (
 	github.com/gorilla/mux v1.8.1
 	github.com/gorilla/websocket v1.5.1
 	github.com/lkmio/avformat v0.0.0
+	github.com/lkmio/g726 v0.1.3
 	github.com/natefinch/lumberjack v2.0.0+incompatible
-	github.com/pion/interceptor v0.1.25
-	github.com/pion/rtcp v1.2.12
-	github.com/pion/rtp v1.8.5
-	github.com/pion/sdp/v3 v3.0.8
-	github.com/pion/webrtc/v3 v3.2.29
+	github.com/pion/interceptor v0.1.40
+	github.com/pion/rtcp v1.2.15
+	github.com/pion/rtp v1.8.21
+	github.com/pion/sdp/v3 v3.0.14
+	github.com/pion/webrtc/v4 v4.1.3
 	github.com/sirupsen/logrus v1.9.3
 	github.com/x-cray/logrus-prefixed-formatter v0.5.2
 	go.uber.org/zap v1.27.0
@@ -26,32 +27,30 @@ require (
 
 require (
 	github.com/BurntSushi/toml v1.3.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/google/uuid v1.3.1 // indirect
-	github.com/lkmio/g726 v0.1.3 // indirect
+	github.com/google/uuid v1.6.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
-	github.com/pion/datachannel v1.5.5 // indirect
-	github.com/pion/dtls/v2 v2.2.7 // indirect
-	github.com/pion/ice/v2 v2.3.13 // indirect
-	github.com/pion/logging v0.2.2 // indirect
-	github.com/pion/mdns v0.0.12 // indirect
+	github.com/nxadm/tail v1.4.8 // indirect
+	github.com/pion/datachannel v1.5.10 // indirect
+	github.com/pion/dtls/v3 v3.0.6 // indirect
+	github.com/pion/ice/v4 v4.0.10 // indirect
+	github.com/pion/logging v0.2.4 // indirect
+	github.com/pion/mdns/v2 v2.0.7 // indirect
 	github.com/pion/randutil v0.1.0 // indirect
-	github.com/pion/sctp v1.8.12 // indirect
-	github.com/pion/srtp/v2 v2.0.18 // indirect
-	github.com/pion/stun v0.6.1 // indirect
-	github.com/pion/transport/v2 v2.2.3 // indirect
-	github.com/pion/turn/v2 v2.1.3 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/stretchr/testify v1.9.0 // indirect
+	github.com/pion/sctp v1.8.39 // indirect
+	github.com/pion/srtp/v3 v3.0.6 // indirect
+	github.com/pion/stun/v3 v3.0.0 // indirect
+	github.com/pion/transport/v3 v3.0.7 // indirect
+	github.com/pion/turn/v4 v4.0.0 // indirect
+	github.com/wlynxg/anet v0.0.5 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
-	golang.org/x/crypto v0.18.0 // indirect
-	golang.org/x/net v0.20.0 // indirect
-	golang.org/x/sys v0.16.0 // indirect
-	golang.org/x/term v0.16.0 // indirect
+	golang.org/x/crypto v0.33.0 // indirect
+	golang.org/x/net v0.35.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
+	golang.org/x/term v0.29.0 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 replace github.com/lkmio/avformat => ../avformat
diff --git a/rtc/rtc_sink.go b/rtc/rtc_sink.go
index ff6ff24..72a76fb 100644
--- a/rtc/rtc_sink.go
+++ b/rtc/rtc_sink.go
@@ -6,8 +6,8 @@ import (
 	"github.com/lkmio/avformat/utils"
 	"github.com/lkmio/lkm/log"
 	"github.com/lkmio/lkm/stream"
-	"github.com/pion/webrtc/v3"
-	"github.com/pion/webrtc/v3/pkg/media"
+	"github.com/pion/webrtc/v4"
+	"github.com/pion/webrtc/v4/pkg/media"
 	"io"
 	"time"
 )
@@ -96,6 +96,12 @@ func (s *Sink) StartStreaming(transStream stream.TransStream) error {
 		return err
 	}
 
+	// offer的sdp, 应答给http请求
+	if s.cb != nil {
+		log.Sugar.Infof("answer: %s", connection.LocalDescription().SDP)
+		s.cb(connection.LocalDescription().SDP)
+	}
+
 	<-complete
 	connection.OnICEConnectionStateChange(func(state webrtc.ICEConnectionState) {
 		s.state = state
@@ -109,10 +115,6 @@ func (s *Sink) StartStreaming(transStream stream.TransStream) error {
 
 	s.peer = connection
 
-	// offer的sdp, 应答给http请求
-	if s.cb != nil {
-		s.cb(connection.LocalDescription().SDP)
-	}
 	return nil
 }
 
diff --git a/rtc/rtc_stream.go b/rtc/rtc_stream.go
index a2574dc..00ed118 100644
--- a/rtc/rtc_stream.go
+++ b/rtc/rtc_stream.go
@@ -6,7 +6,7 @@ import (
 	"github.com/lkmio/avformat/utils"
 	"github.com/lkmio/lkm/stream"
 	"github.com/pion/interceptor"
-	"github.com/pion/webrtc/v3"
+	"github.com/pion/webrtc/v4"
 	"net"
 )
 
@@ -37,11 +37,6 @@ func (t *transStream) Input(packet *avformat.AVPacket, _ int) ([]*collections.Re
 		t.AppendOutStreamBuffer(collections.NewReferenceCounter(packet.Data))
 	} else if utils.AVMediaTypeVideo == packet.MediaType {
 		avStream := t.FindTrackWithStreamIndex(packet.Index).Stream
-		if packet.Key {
-			extra := avStream.CodecParameters.AnnexBExtraData()
-			t.AppendOutStreamBuffer(collections.NewReferenceCounter(extra))
-		}
-
 		data := avformat.AVCCPacket2AnnexB(avStream, packet)
 		t.AppendOutStreamBuffer(collections.NewReferenceCounter(data))
 	}
diff --git a/stream/stream_publisher.go b/stream/stream_publisher.go
index 4a5c45a..2c8353e 100644
--- a/stream/stream_publisher.go
+++ b/stream/stream_publisher.go
@@ -766,13 +766,13 @@ func (t *transStreamPublisher) ClearGopBuffer(free bool) {
 		if packet.Release() && free {
 			avformat.FreePacket(packet.Get())
 		}
-
-		// 释放annexb和avcc格式转换的缓存
-		if t.bitstreamFilterBuffer != nil {
-			t.bitstreamFilterBuffer.Pop()
-		}
 	})
 
+	// 释放annexb和avcc格式转换的缓存
+	if t.bitstreamFilterBuffer != nil {
+		t.bitstreamFilterBuffer.Clear()
+	}
+
 	// 丢弃转码track中的缓存
 	for _, track := range t.transcodeTracks {
 		track.Clear()