diff --git a/api/source/mk_tcp.cpp b/api/source/mk_tcp.cpp
index e96ce4bf..d155cac8 100644
--- a/api/source/mk_tcp.cpp
+++ b/api/source/mk_tcp.cpp
@@ -155,7 +155,7 @@ API_EXPORT void API_CALL mk_tcp_session_send_buffer_safe(const mk_tcp_session ct
 
 API_EXPORT mk_tcp_session_ref API_CALL mk_tcp_session_ref_from(const mk_tcp_session ctx) {
     auto ref = ((SessionForC *) ctx)->shared_from_this();
-    return (mk_tcp_session_ref)new std::shared_ptr<SessionForC>(std::dynamic_pointer_cast<SessionForC>(ref));
+    return (mk_tcp_session_ref)new std::shared_ptr<SessionForC>(std::static_pointer_cast<SessionForC>(ref));
 }
 
 API_EXPORT void mk_tcp_session_ref_release(const mk_tcp_session_ref ref) {
diff --git a/api/source/mk_thread.cpp b/api/source/mk_thread.cpp
index 56b5be2a..29775b43 100644
--- a/api/source/mk_thread.cpp
+++ b/api/source/mk_thread.cpp
@@ -143,7 +143,7 @@ public:
     }
 
     EventPoller::Ptr getPoller() {
-        return dynamic_pointer_cast<EventPoller>(getExecutor());
+        return static_pointer_cast<EventPoller>(getExecutor());
     }
 };
 
diff --git a/src/FMP4/FMP4MediaSource.h b/src/FMP4/FMP4MediaSource.h
index e004dc5e..7986a08c 100644
--- a/src/FMP4/FMP4MediaSource.h
+++ b/src/FMP4/FMP4MediaSource.h
@@ -108,7 +108,7 @@ public:
 
 private:
     void createRing(){
-        std::weak_ptr<FMP4MediaSource> weak_self = std::dynamic_pointer_cast<FMP4MediaSource>(shared_from_this());
+        std::weak_ptr<FMP4MediaSource> weak_self = std::static_pointer_cast<FMP4MediaSource>(shared_from_this());
         _ring = std::make_shared<RingType>(_ring_size, [weak_self](int size) {
             auto strong_self = weak_self.lock();
             if (!strong_self) {
diff --git a/src/Http/HlsPlayer.cpp b/src/Http/HlsPlayer.cpp
index e8ca1471..1de45cf8 100644
--- a/src/Http/HlsPlayer.cpp
+++ b/src/Http/HlsPlayer.cpp
@@ -80,7 +80,7 @@ void HlsPlayer::fetchSegment() {
         //播放器目前还存活，正在下载中
         return;
     }
-    weak_ptr<HlsPlayer> weak_self = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
+    weak_ptr<HlsPlayer> weak_self = static_pointer_cast<HlsPlayer>(shared_from_this());
     if (!_http_ts_player) {
         _http_ts_player = std::make_shared<HttpTSPlayer>(getPoller());
         _http_ts_player->setOnCreateSocket([weak_self](const EventPoller::Ptr &poller) {
@@ -186,7 +186,7 @@ bool HlsPlayer::onParsed(bool is_m3u8_inner, int64_t sequence, const map<int, ts
             throw invalid_argument("empty sub hls list:" + getUrl());
         }
         _timer.reset();
-        weak_ptr<HlsPlayer> weak_self = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
+        weak_ptr<HlsPlayer> weak_self = static_pointer_cast<HlsPlayer>(shared_from_this());
         auto url = ts_map.rbegin()->second.url;
         getPoller()->async([weak_self, url]() {
             auto strong_self = weak_self.lock();
@@ -259,7 +259,7 @@ bool HlsPlayer::onRedirectUrl(const string &url, bool temporary) {
 }
 
 void HlsPlayer::playDelay() {
-    weak_ptr<HlsPlayer> weak_self = dynamic_pointer_cast<HlsPlayer>(shared_from_this());
+    weak_ptr<HlsPlayer> weak_self = static_pointer_cast<HlsPlayer>(shared_from_this());
     _timer.reset(new Timer(delaySecond(), [weak_self]() {
         auto strong_self = weak_self.lock();
         if (strong_self) {
diff --git a/src/Http/HttpRequester.cpp b/src/Http/HttpRequester.cpp
index ddc73631..3e403df2 100644
--- a/src/Http/HttpRequester.cpp
+++ b/src/Http/HttpRequester.cpp
@@ -27,7 +27,7 @@ void HttpRequester::onResponseBody(const char *buf, size_t size) {
 
 void HttpRequester::onResponseCompleted(const SockException &ex) {
     if (ex && _retry++ < _max_retry) {
-        std::weak_ptr<HttpRequester> weak_self = std::dynamic_pointer_cast<HttpRequester>(shared_from_this());
+        std::weak_ptr<HttpRequester> weak_self = std::static_pointer_cast<HttpRequester>(shared_from_this());
         getPoller()->doDelayTask(_retry_delay, [weak_self](){
             if (auto self = weak_self.lock()) {
                 InfoL << "resend request " << self->getUrl() << " with retry " << self->getRetry();
diff --git a/src/Http/HttpSession.cpp b/src/Http/HttpSession.cpp
index 7acd9fa7..8243cba0 100644
--- a/src/Http/HttpSession.cpp
+++ b/src/Http/HttpSession.cpp
@@ -202,7 +202,7 @@ bool HttpSession::checkLiveStream(const string &schema, const string  &url_suffi
     }
 
     bool close_flag = !strcasecmp(_parser["Connection"].data(), "close");
-    weak_ptr<HttpSession> weak_self = dynamic_pointer_cast<HttpSession>(shared_from_this());
+    weak_ptr<HttpSession> weak_self = static_pointer_cast<HttpSession>(shared_from_this());
 
     //鉴权结果回调
     auto onRes = [cb, weak_self, close_flag](const string &err) {
@@ -266,7 +266,7 @@ bool HttpSession::checkLiveStreamFMP4(const function<void()> &cb){
         //直播牺牲延时提升发送性能
         setSocketFlags();
         onWrite(std::make_shared<BufferString>(fmp4_src->getInitSegment()), true);
-        weak_ptr<HttpSession> weak_self = dynamic_pointer_cast<HttpSession>(shared_from_this());
+        weak_ptr<HttpSession> weak_self = static_pointer_cast<HttpSession>(shared_from_this());
         fmp4_src->pause(false);
         _fmp4_reader = fmp4_src->getRing()->attach(getPoller());
         _fmp4_reader->setGetInfoCB([weak_self]() { return weak_self.lock(); });
@@ -308,7 +308,7 @@ bool HttpSession::checkLiveStreamTS(const function<void()> &cb){
 
         //直播牺牲延时提升发送性能
         setSocketFlags();
-        weak_ptr<HttpSession> weak_self = dynamic_pointer_cast<HttpSession>(shared_from_this());
+        weak_ptr<HttpSession> weak_self = static_pointer_cast<HttpSession>(shared_from_this());
         ts_src->pause(false);
         _ts_reader = ts_src->getRing()->attach(getPoller());
         _ts_reader->setGetInfoCB([weak_self]() { return weak_self.lock(); });
@@ -406,7 +406,7 @@ void HttpSession::Handle_Req_GET_l(ssize_t &content_len, bool sendBody) {
     }
 
     bool bClose = !strcasecmp(_parser["Connection"].data(),"close");
-    weak_ptr<HttpSession> weak_self = dynamic_pointer_cast<HttpSession>(shared_from_this());
+    weak_ptr<HttpSession> weak_self = static_pointer_cast<HttpSession>(shared_from_this());
     HttpFileManager::onAccessPath(*this, _parser, [weak_self, bClose](int code, const string &content_type,
                                                                      const StrCaseMap &responseHeader, const HttpBody::Ptr &body) {
         auto strong_self = weak_self.lock();
@@ -434,12 +434,13 @@ class AsyncSenderData {
 public:
     friend class AsyncSender;
     using Ptr = std::shared_ptr<AsyncSenderData>;
-    AsyncSenderData(const Session::Ptr &session, const HttpBody::Ptr &body, bool close_when_complete) {
-        _session = dynamic_pointer_cast<HttpSession>(session);
+    AsyncSenderData(HttpSession::Ptr session, const HttpBody::Ptr &body, bool close_when_complete) {
+        _session = std::move(session);
         _body = body;
         _close_when_complete = close_when_complete;
     }
     ~AsyncSenderData() = default;
+
 private:
     std::weak_ptr<HttpSession> _session;
     HttpBody::Ptr _body;
@@ -612,7 +613,7 @@ void HttpSession::sendResponse(int code,
     }
 
     //发送http body
-    AsyncSenderData::Ptr data = std::make_shared<AsyncSenderData>(static_pointer_cast<Session>(shared_from_this()), body, bClose);
+    AsyncSenderData::Ptr data = std::make_shared<AsyncSenderData>(static_pointer_cast<HttpSession>(shared_from_this()), body, bClose);
     getSock()->setOnFlush([data]() { return AsyncSender::onSocketFlushed(data); });
     AsyncSender::onSocketFlushed(data);
 }
@@ -639,7 +640,7 @@ void HttpSession::urlDecode(Parser &parser){
 bool HttpSession::emitHttpEvent(bool doInvoke){
     bool bClose = !strcasecmp(_parser["Connection"].data(),"close");
     /////////////////////异步回复Invoker///////////////////////////////
-    weak_ptr<HttpSession> weak_self = dynamic_pointer_cast<HttpSession>(shared_from_this());
+    weak_ptr<HttpSession> weak_self = static_pointer_cast<HttpSession>(shared_from_this());
     HttpResponseInvoker invoker = [weak_self,bClose](int code, const KeyValue &headerOut, const HttpBody::Ptr &body){
         auto strong_self = weak_self.lock();
         if(!strong_self) {
diff --git a/src/Http/HttpSession.h b/src/Http/HttpSession.h
index 42eaad44..b06a7f9e 100644
--- a/src/Http/HttpSession.h
+++ b/src/Http/HttpSession.h
@@ -28,15 +28,16 @@ class HttpSession: public toolkit::Session,
                    public HttpRequestSplitter,
                    public WebSocketSplitter {
 public:
-    typedef StrCaseMap KeyValue;
-    typedef HttpResponseInvokerImp HttpResponseInvoker;
+    using Ptr = std::shared_ptr<HttpSession>;
+    using KeyValue = StrCaseMap;
+    using HttpResponseInvoker = HttpResponseInvokerImp ;
     friend class AsyncSender;
     /**
      * @param errMsg 如果为空，则代表鉴权通过，否则为错误提示
      * @param accessPath 运行或禁止访问的根目录
      * @param cookieLifeSecond 鉴权cookie有效期
      **/
-    typedef std::function<void(const std::string &errMsg,const std::string &accessPath, int cookieLifeSecond)> HttpAccessPathInvoker;
+    using HttpAccessPathInvoker = std::function<void(const std::string &errMsg,const std::string &accessPath, int cookieLifeSecond)>;
 
     HttpSession(const toolkit::Socket::Ptr &pSock);
     ~HttpSession() override;
diff --git a/src/Http/WebSocketClient.h b/src/Http/WebSocketClient.h
index 379ae66d..5850b027 100644
--- a/src/Http/WebSocketClient.h
+++ b/src/Http/WebSocketClient.h
@@ -316,7 +316,7 @@ private:
         if (!ex) {
             // websocket握手成功
             // 此处截取TcpClient派生类发送的数据并进行websocket协议打包
-            std::weak_ptr<HttpWsClient> weakSelf = std::dynamic_pointer_cast<HttpWsClient>(shared_from_this());
+            std::weak_ptr<HttpWsClient> weakSelf = std::static_pointer_cast<HttpWsClient>(shared_from_this());
             if (auto strong_ref = _weak_delegate.lock()) {
                 strong_ref->setOnBeforeSendCB([weakSelf](const toolkit::Buffer::Ptr &buf) {
                     auto strong_self = weakSelf.lock();
diff --git a/src/Http/WebSocketSession.h b/src/Http/WebSocketSession.h
index c8d8b432..96021c4d 100644
--- a/src/Http/WebSocketSession.h
+++ b/src/Http/WebSocketSession.h
@@ -139,7 +139,7 @@ protected:
         }
 
         //此处截取数据并进行websocket协议打包
-        std::weak_ptr<WebSocketSessionBase> weakSelf = std::dynamic_pointer_cast<WebSocketSessionBase>(HttpSessionType::shared_from_this());
+        std::weak_ptr<WebSocketSessionBase> weakSelf = std::static_pointer_cast<WebSocketSessionBase>(HttpSessionType::shared_from_this());
         std::dynamic_pointer_cast<SendInterceptor>(_session)->setOnBeforeSendCB([weakSelf](const toolkit::Buffer::Ptr &buf) {
             auto strongSelf = weakSelf.lock();
             if (strongSelf) {
diff --git a/src/Record/HlsMediaSource.cpp b/src/Record/HlsMediaSource.cpp
index 406a6c6a..d6d4f4b4 100644
--- a/src/Record/HlsMediaSource.cpp
+++ b/src/Record/HlsMediaSource.cpp
@@ -68,7 +68,7 @@ HlsMediaSource::Ptr HlsCookieData::getMediaSource() const {
 void HlsMediaSource::setIndexFile(std::string index_file)
 {
     if (!_ring) {
-        std::weak_ptr<HlsMediaSource> weakSelf = std::dynamic_pointer_cast<HlsMediaSource>(shared_from_this());
+        std::weak_ptr<HlsMediaSource> weakSelf = std::static_pointer_cast<HlsMediaSource>(shared_from_this());
         auto lam = [weakSelf](int size) {
             auto strongSelf = weakSelf.lock();
             if (!strongSelf) {
diff --git a/src/Rtmp/RtmpMediaSourceImp.cpp b/src/Rtmp/RtmpMediaSourceImp.cpp
index 8e49e534..7777a0fa 100644
--- a/src/Rtmp/RtmpMediaSourceImp.cpp
+++ b/src/Rtmp/RtmpMediaSourceImp.cpp
@@ -41,7 +41,7 @@ void RtmpMediaSource::onWrite(RtmpPacket::Ptr pkt, bool /*= true*/)
     }
 
     if (!_ring) {
-        std::weak_ptr<RtmpMediaSource> weakSelf = std::dynamic_pointer_cast<RtmpMediaSource>(shared_from_this());
+        std::weak_ptr<RtmpMediaSource> weakSelf = std::static_pointer_cast<RtmpMediaSource>(shared_from_this());
         auto lam = [weakSelf](int size) {
             auto strongSelf = weakSelf.lock();
             if (!strongSelf) {
diff --git a/src/Rtmp/RtmpPlayer.cpp b/src/Rtmp/RtmpPlayer.cpp
index 4e7d903d..ffaf0dfc 100644
--- a/src/Rtmp/RtmpPlayer.cpp
+++ b/src/Rtmp/RtmpPlayer.cpp
@@ -75,7 +75,7 @@ void RtmpPlayer::play(const string &url)  {
         setNetAdapter((*this)[Client::kNetAdapter]);
     }
 
-    weak_ptr<RtmpPlayer> weak_self = dynamic_pointer_cast<RtmpPlayer>(shared_from_this());
+    weak_ptr<RtmpPlayer> weak_self = static_pointer_cast<RtmpPlayer>(shared_from_this());
     float play_timeout_sec = (*this)[Client::kTimeoutMS].as<int>() / 1000.0f;
     _play_timer.reset(new Timer(play_timeout_sec, [weak_self]() {
         auto strong_self = weak_self.lock();
@@ -120,7 +120,7 @@ void RtmpPlayer::onPlayResult_l(const SockException &ex, bool handshake_done) {
         //播放成功，恢复rtmp接收超时定时器
         _rtmp_recv_ticker.resetTime();
         auto timeout_ms = (*this)[Client::kMediaTimeoutMS].as<uint64_t>();
-        weak_ptr<RtmpPlayer> weak_self = dynamic_pointer_cast<RtmpPlayer>(shared_from_this());
+        weak_ptr<RtmpPlayer> weak_self = static_pointer_cast<RtmpPlayer>(shared_from_this());
         auto lam = [weak_self, timeout_ms]() {
             auto strong_self = weak_self.lock();
             if (!strong_self) {
@@ -146,7 +146,7 @@ void RtmpPlayer::onConnect(const SockException &err) {
         onPlayResult_l(err, false);
         return;
     }
-    weak_ptr<RtmpPlayer> weak_self = dynamic_pointer_cast<RtmpPlayer>(shared_from_this());
+    weak_ptr<RtmpPlayer> weak_self = static_pointer_cast<RtmpPlayer>(shared_from_this());
     startClientSession([weak_self]() {
         if (auto strong_self = weak_self.lock()) {
             strong_self->send_connect();
@@ -258,7 +258,7 @@ void RtmpPlayer::send_pause(bool pause) {
 
     _beat_timer.reset();
     if (pause) {
-        weak_ptr<RtmpPlayer> weak_self = dynamic_pointer_cast<RtmpPlayer>(shared_from_this());
+        weak_ptr<RtmpPlayer> weak_self = static_pointer_cast<RtmpPlayer>(shared_from_this());
         _beat_timer.reset(new Timer((*this)[Client::kBeatIntervalMS].as<int>() / 1000.0f, [weak_self]() {
             auto strong_self = weak_self.lock();
             if (!strong_self) {
diff --git a/src/Rtmp/RtmpPusher.cpp b/src/Rtmp/RtmpPusher.cpp
index bf5ca332..31143dcf 100644
--- a/src/Rtmp/RtmpPusher.cpp
+++ b/src/Rtmp/RtmpPusher.cpp
@@ -79,7 +79,7 @@ void RtmpPusher::publish(const string &url)  {
     uint16_t port = 1935;
     splitUrl(host_url, host_url, port);
 
-    weak_ptr<RtmpPusher> weakSelf = dynamic_pointer_cast<RtmpPusher>(shared_from_this());
+    weak_ptr<RtmpPusher> weakSelf = static_pointer_cast<RtmpPusher>(shared_from_this());
     float publishTimeOutSec = (*this)[Client::kTimeoutMS].as<int>() / 1000.0f;
     _publish_timer.reset(new Timer(publishTimeOutSec, [weakSelf]() {
         auto strongSelf = weakSelf.lock();
@@ -107,7 +107,7 @@ void RtmpPusher::onConnect(const SockException &err){
         onPublishResult_l(err, false);
         return;
     }
-    weak_ptr<RtmpPusher> weak_self = dynamic_pointer_cast<RtmpPusher>(shared_from_this());
+    weak_ptr<RtmpPusher> weak_self = static_pointer_cast<RtmpPusher>(shared_from_this());
     startClientSession([weak_self]() {
         auto strong_self = weak_self.lock();
         if (!strong_self) {
@@ -193,7 +193,7 @@ void RtmpPusher::send_metaData(){
 
     src->pause(false);
     _rtmp_reader = src->getRing()->attach(getPoller());
-    weak_ptr<RtmpPusher> weak_self = dynamic_pointer_cast<RtmpPusher>(shared_from_this());
+    weak_ptr<RtmpPusher> weak_self = static_pointer_cast<RtmpPusher>(shared_from_this());
     _rtmp_reader->setReadCB([weak_self](const RtmpMediaSource::RingDataType &pkt) {
         auto strong_self = weak_self.lock();
         if (!strong_self) {
diff --git a/src/Rtmp/RtmpSession.cpp b/src/Rtmp/RtmpSession.cpp
index ae827551..3c3f552e 100644
--- a/src/Rtmp/RtmpSession.cpp
+++ b/src/Rtmp/RtmpSession.cpp
@@ -127,7 +127,7 @@ void RtmpSession::onCmd_createStream(AMFDecoder &dec) {
 
 void RtmpSession::onCmd_publish(AMFDecoder &dec) {
     std::shared_ptr<Ticker> ticker(new Ticker);
-    weak_ptr<RtmpSession> weak_self = dynamic_pointer_cast<RtmpSession>(shared_from_this());
+    weak_ptr<RtmpSession> weak_self = static_pointer_cast<RtmpSession>(shared_from_this());
     std::shared_ptr<onceToken> token(new onceToken(nullptr, [ticker, weak_self]() {
         auto strong_self = weak_self.lock();
         if (strong_self) {
@@ -188,7 +188,7 @@ void RtmpSession::onCmd_publish(AMFDecoder &dec) {
             _push_src->setProtocolOption(option);
         }
 
-        _push_src->setListener(dynamic_pointer_cast<MediaSourceEvent>(shared_from_this()));
+        _push_src->setListener(static_pointer_cast<RtmpSession>(shared_from_this()));
         _continue_push_ms = option.continue_push_ms;
         sendStatus({"level", "status",
                     "code", "NetStream.Publish.Start",
@@ -310,7 +310,7 @@ void RtmpSession::sendPlayResponse(const string &err, const RtmpMediaSource::Ptr
 
     src->pause(false);
     _ring_reader = src->getRing()->attach(getPoller());
-    weak_ptr<RtmpSession> weak_self = dynamic_pointer_cast<RtmpSession>(shared_from_this());
+    weak_ptr<RtmpSession> weak_self = static_pointer_cast<RtmpSession>(shared_from_this());
     _ring_reader->setGetInfoCB([weak_self]() { return weak_self.lock(); });
     _ring_reader->setReadCB([weak_self](const RtmpMediaSource::RingDataType &pkt) {
         auto strong_self = weak_self.lock();
@@ -349,7 +349,7 @@ void RtmpSession::doPlayResponse(const string &err,const std::function<void(bool
     }
 
     //鉴权成功，查找媒体源并回复
-    weak_ptr<RtmpSession> weak_self = dynamic_pointer_cast<RtmpSession>(shared_from_this());
+    weak_ptr<RtmpSession> weak_self = static_pointer_cast<RtmpSession>(shared_from_this());
     MediaSource::findAsync(_media_info, weak_self.lock(), [weak_self,cb](const MediaSource::Ptr &src){
         auto rtmp_src = dynamic_pointer_cast<RtmpMediaSource>(src);
         auto strong_self = weak_self.lock();
@@ -362,7 +362,7 @@ void RtmpSession::doPlayResponse(const string &err,const std::function<void(bool
 
 void RtmpSession::doPlay(AMFDecoder &dec){
     std::shared_ptr<Ticker> ticker(new Ticker);
-    weak_ptr<RtmpSession> weak_self = dynamic_pointer_cast<RtmpSession>(shared_from_this());
+    weak_ptr<RtmpSession> weak_self = static_pointer_cast<RtmpSession>(shared_from_this());
     std::shared_ptr<onceToken> token(new onceToken(nullptr, [ticker,weak_self](){
         auto strong_self = weak_self.lock();
         if (strong_self) {
diff --git a/src/Rtp/RtpSession.cpp b/src/Rtp/RtpSession.cpp
index 26faadfb..38b6d4cd 100644
--- a/src/Rtp/RtpSession.cpp
+++ b/src/Rtp/RtpSession.cpp
@@ -122,7 +122,7 @@ void RtpSession::onRtpPacket(const char *data, size_t len) {
             return;
         }
         _process->setOnlyAudio(_only_audio);
-        _process->setDelegate(dynamic_pointer_cast<RtpSession>(shared_from_this()));
+        _process->setDelegate(static_pointer_cast<RtpSession>(shared_from_this()));
     }
     try {
         uint32_t rtp_ssrc = 0;
diff --git a/src/Rtsp/RtspMediaSourceImp.cpp b/src/Rtsp/RtspMediaSourceImp.cpp
index a262fad5..7354306f 100644
--- a/src/Rtsp/RtspMediaSourceImp.cpp
+++ b/src/Rtsp/RtspMediaSourceImp.cpp
@@ -55,7 +55,7 @@ void RtspMediaSource::onWrite(RtpPacket::Ptr rtp, bool keyPos) {
         track->_ssrc = rtp->getSSRC();
     }
     if (!_ring) {
-        std::weak_ptr<RtspMediaSource> weakSelf = std::dynamic_pointer_cast<RtspMediaSource>(shared_from_this());
+        std::weak_ptr<RtspMediaSource> weakSelf = std::static_pointer_cast<RtspMediaSource>(shared_from_this());
         auto lam = [weakSelf](int size) {
             auto strongSelf = weakSelf.lock();
             if (!strongSelf) {
diff --git a/src/Rtsp/RtspPlayer.cpp b/src/Rtsp/RtspPlayer.cpp
index 6fae5e07..67d0b281 100644
--- a/src/Rtsp/RtspPlayer.cpp
+++ b/src/Rtsp/RtspPlayer.cpp
@@ -92,7 +92,7 @@ void RtspPlayer::play(const string &strUrl){
     _rtp_type = (Rtsp::eRtpType)(int)(*this)[Client::kRtpType];
     DebugL << url._url << " " << (url._user.size() ? url._user : "null") << " " << (url._passwd.size() ? url._passwd : "null") << " " << _rtp_type;
 
-    weak_ptr<RtspPlayer> weakSelf = dynamic_pointer_cast<RtspPlayer>(shared_from_this());
+    weak_ptr<RtspPlayer> weakSelf = static_pointer_cast<RtspPlayer>(shared_from_this());
     float playTimeOutSec = (*this)[Client::kTimeoutMS].as<int>() / 1000.0f;
     _play_check_timer.reset(new Timer(playTimeOutSec, [weakSelf]() {
         auto strongSelf=weakSelf.lock();
@@ -348,7 +348,7 @@ void RtspPlayer::handleResSETUP(const Parser &parser, unsigned int track_idx) {
         }
 
         auto peer_ip = get_peer_ip();
-        weak_ptr<RtspPlayer> weakSelf = dynamic_pointer_cast<RtspPlayer>(shared_from_this());
+        weak_ptr<RtspPlayer> weakSelf = static_pointer_cast<RtspPlayer>(shared_from_this());
         //设置rtp over udp接收回调处理函数
         pRtpSockRef->setOnRead([peer_ip, track_idx, weakSelf](const Buffer::Ptr &buf, struct sockaddr *addr , int addr_len) {
             auto strongSelf = weakSelf.lock();
@@ -705,7 +705,7 @@ void RtspPlayer::onPlayResult_l(const SockException &ex , bool handshake_done) {
         //播放成功，恢复rtp接收超时定时器
         _rtp_recv_ticker.resetTime();
         auto timeoutMS = (*this)[Client::kMediaTimeoutMS].as<uint64_t>();
-        weak_ptr<RtspPlayer> weakSelf = dynamic_pointer_cast<RtspPlayer>(shared_from_this());
+        weak_ptr<RtspPlayer> weakSelf = static_pointer_cast<RtspPlayer>(shared_from_this());
         auto lam = [weakSelf, timeoutMS]() {
             auto strongSelf = weakSelf.lock();
             if (!strongSelf) {
diff --git a/src/Rtsp/RtspPusher.cpp b/src/Rtsp/RtspPusher.cpp
index 575f551c..01727adc 100644
--- a/src/Rtsp/RtspPusher.cpp
+++ b/src/Rtsp/RtspPusher.cpp
@@ -80,7 +80,7 @@ void RtspPusher::publish(const string &url_str) {
     DebugL << url._url << " " << (url._user.size() ? url._user : "null") << " "
            << (url._passwd.size() ? url._passwd : "null") << " " << _rtp_type;
 
-    weak_ptr<RtspPusher> weak_self = dynamic_pointer_cast<RtspPusher>(shared_from_this());
+    weak_ptr<RtspPusher> weak_self = static_pointer_cast<RtspPusher>(shared_from_this());
     float publish_timeout_sec = (*this)[Client::kTimeoutMS].as<int>() / 1000.0f;
     _publish_timer.reset(new Timer(publish_timeout_sec, [weak_self]() {
         auto strong_self = weak_self.lock();
@@ -320,7 +320,7 @@ void RtspPusher::handleResSetup(const Parser &parser, unsigned int track_idx) {
         rtcp_sock->bindPeerAddr((struct sockaddr *)&(rtcpto));
 
         auto peer_ip = get_peer_ip();
-        weak_ptr<RtspPusher> weakSelf = dynamic_pointer_cast<RtspPusher>(shared_from_this());
+        weak_ptr<RtspPusher> weakSelf = static_pointer_cast<RtspPusher>(shared_from_this());
         if(rtcp_sock) {
             //设置rtcp over udp接收回调处理函数
             rtcp_sock->setOnRead([peer_ip, track_idx, weakSelf](const Buffer::Ptr &buf, struct sockaddr *addr , int addr_len) {
@@ -451,7 +451,7 @@ void RtspPusher::sendRecord() {
 
         src->pause(false);
         _rtsp_reader = src->getRing()->attach(getPoller());
-        weak_ptr<RtspPusher> weak_self = dynamic_pointer_cast<RtspPusher>(shared_from_this());
+        weak_ptr<RtspPusher> weak_self = static_pointer_cast<RtspPusher>(shared_from_this());
         _rtsp_reader->setReadCB([weak_self](const RtspMediaSource::RingDataType &pkt) {
             auto strong_self = weak_self.lock();
             if (!strong_self) {
diff --git a/src/Rtsp/RtspSession.cpp b/src/Rtsp/RtspSession.cpp
index c02772ce..5388ad53 100644
--- a/src/Rtsp/RtspSession.cpp
+++ b/src/Rtsp/RtspSession.cpp
@@ -273,12 +273,12 @@ void RtspSession::handleReq_ANNOUNCE(const Parser &parser) {
             _push_src->setSdp(parser.Content());
         }
 
-        _push_src->setListener(dynamic_pointer_cast<MediaSourceEvent>(shared_from_this()));
+        _push_src->setListener(static_pointer_cast<RtspSession>(shared_from_this()));
         _continue_push_ms = option.continue_push_ms;
         sendRtspResponse("200 OK");
     };
 
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     Broadcast::PublishAuthInvoker invoker = [weak_self, onRes](const string &err, const ProtocolOption &option) {
         auto strong_self = weak_self.lock();
         if (!strong_self) {
@@ -325,7 +325,7 @@ void RtspSession::handleReq_RECORD(const Parser &parser){
 }
 
 void RtspSession::emitOnPlay(){
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     //url鉴权回调
     auto onRes = [weak_self](const string &err) {
         auto strong_self = weak_self.lock();
@@ -364,7 +364,7 @@ void RtspSession::emitOnPlay(){
 void RtspSession::handleReq_Describe(const Parser &parser) {
     //该请求中的认证信息
     auto authorization = parser["Authorization"];
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     //rtsp专属鉴权是否开启事件回调
     onGetRealm invoker = [weak_self, authorization](const string &realm) {
         auto strong_self = weak_self.lock();
@@ -402,7 +402,7 @@ void RtspSession::handleReq_Describe(const Parser &parser) {
 }
 
 void RtspSession::onAuthSuccess() {
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     MediaSource::findAsync(_media_info, weak_self.lock(), [weak_self](const MediaSource::Ptr &src){
         auto strong_self = weak_self.lock();
         if(!strong_self){
@@ -471,7 +471,7 @@ void RtspSession::onAuthBasic(const string &realm, const string &auth_base64) {
     }
     auto user = user_pwd_vec[0];
     auto pwd = user_pwd_vec[1];
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     onAuth invoker = [pwd, realm, weak_self](bool encrypted, const string &good_pwd) {
         auto strong_self = weak_self.lock();
         if (!strong_self) {
@@ -564,7 +564,7 @@ void RtspSession::onAuthDigest(const string &realm,const string &auth_md5){
         }
     };
 
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     onAuth invoker = [realInvoker,weak_self](bool encrypted,const string &good_pwd){
         auto strong_self = weak_self.lock();
         if(!strong_self){
@@ -722,7 +722,7 @@ void RtspSession::handleReq_Setup(const Parser &parser) {
                 send_NotAcceptable();
                 throw SockException(Err_shutdown, "can not get a available udp multicast socket");
             }
-            weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+            weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
             _multicaster->setDetachCB(this, [weak_self]() {
                 auto strong_self = weak_self.lock();
                 if(!strong_self) {
@@ -830,7 +830,7 @@ void RtspSession::handleReq_Play(const Parser &parser) {
     setSocketFlags();
 
     if (!_play_reader && _rtp_type != Rtsp::RTP_MULTICAST) {
-        weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+        weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
         _play_reader = play_src->getRing()->attach(getPoller(), use_gop);
         _play_reader->setGetInfoCB([weak_self]() { return weak_self.lock(); });
         _play_reader->setDetachCB([weak_self]() {
@@ -880,7 +880,7 @@ void RtspSession::handleReq_Get(const Parser &parser) {
 
     //注册http getter，以便http poster绑定
     lock_guard<recursive_mutex> lock(g_mtxGetter);
-    g_mapGetter[_http_x_sessioncookie] = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    g_mapGetter[_http_x_sessioncookie] = static_pointer_cast<RtspSession>(shared_from_this());
 }
 
 void RtspSession::handleReq_Post(const Parser &parser) {
@@ -973,7 +973,7 @@ void RtspSession::onRcvPeerUdpData(int interleaved, const Buffer::Ptr &buf, cons
 }
 
 void RtspSession::startListenPeerUdpData(int track_idx) {
-    weak_ptr<RtspSession> weak_self = dynamic_pointer_cast<RtspSession>(shared_from_this());
+    weak_ptr<RtspSession> weak_self = static_pointer_cast<RtspSession>(shared_from_this());
     auto peer_ip = get_peer_ip();
     auto onUdpData = [weak_self,peer_ip](const Buffer::Ptr &buf, struct sockaddr *peer_addr, int interleaved){
         auto strong_self = weak_self.lock();
diff --git a/src/Shell/ShellSession.cpp b/src/Shell/ShellSession.cpp
index 81e18d7b..fe0c23fd 100644
--- a/src/Shell/ShellSession.cpp
+++ b/src/Shell/ShellSession.cpp
@@ -120,7 +120,7 @@ inline void ShellSession::pleaseInputPasswd() {
             _loginInterceptor=nullptr;
         };
 
-        weak_ptr<ShellSession> weakSelf = dynamic_pointer_cast<ShellSession>(shared_from_this());
+        weak_ptr<ShellSession> weakSelf = static_pointer_cast<ShellSession>(shared_from_this());
         Broadcast::AuthInvoker invoker = [weakSelf,onAuth](const string &errMessage){
             auto strongSelf =  weakSelf.lock();
             if(!strongSelf){
diff --git a/src/TS/TSMediaSource.h b/src/TS/TSMediaSource.h
index 1f4503a4..8a22ad90 100644
--- a/src/TS/TSMediaSource.h
+++ b/src/TS/TSMediaSource.h
@@ -92,7 +92,7 @@ public:
 
 private:
     void createRing(){
-        std::weak_ptr<TSMediaSource> weak_self = std::dynamic_pointer_cast<TSMediaSource>(shared_from_this());
+        std::weak_ptr<TSMediaSource> weak_self = std::static_pointer_cast<TSMediaSource>(shared_from_this());
         _ring = std::make_shared<RingType>(_ring_size, [weak_self](int size) {
             auto strong_self = weak_self.lock();
             if (!strong_self) {
diff --git a/webrtc/WebRtcSession.cpp b/webrtc/WebRtcSession.cpp
index 28c60d58..ee3051c0 100644
--- a/webrtc/WebRtcSession.cpp
+++ b/webrtc/WebRtcSession.cpp
@@ -54,7 +54,7 @@ WebRtcSession::WebRtcSession(const Socket::Ptr &sock) : Session(sock) {
 WebRtcSession::~WebRtcSession() = default;
 
 void WebRtcSession::attachServer(const Server &server) {
-    _server = std::dynamic_pointer_cast<toolkit::TcpServer>(const_cast<Server &>(server).shared_from_this());
+    _server = std::static_pointer_cast<toolkit::TcpServer>(const_cast<Server &>(server).shared_from_this());
 }
 
 void WebRtcSession::onRecv_l(const char *data, size_t len) {
diff --git a/webrtc/WebRtcTransport.cpp b/webrtc/WebRtcTransport.cpp
index 05935076..470ef733 100644
--- a/webrtc/WebRtcTransport.cpp
+++ b/webrtc/WebRtcTransport.cpp
@@ -860,7 +860,7 @@ void WebRtcTransportImp::onRtcp(const char *buf, size_t len) {
 void WebRtcTransportImp::createRtpChannel(const string &rid, uint32_t ssrc, MediaTrack &track) {
     // rid --> RtpReceiverImp
     auto &ref = track.rtp_channel[rid];
-    weak_ptr<WebRtcTransportImp> weak_self = dynamic_pointer_cast<WebRtcTransportImp>(shared_from_this());
+    weak_ptr<WebRtcTransportImp> weak_self = static_pointer_cast<WebRtcTransportImp>(shared_from_this());
     ref = std::make_shared<RtpChannel>(
         getPoller(), [&track, this, rid](RtpPacket::Ptr rtp) mutable { onSortedRtp(track, rid, std::move(rtp)); },
         [&track, weak_self, ssrc](const FCI_NACK &nack) mutable {