diff --git a/3rdpart/media-server b/3rdpart/media-server
index e399b938..a32fe104 160000
--- a/3rdpart/media-server
+++ b/3rdpart/media-server
@@ -1 +1 @@
-Subproject commit e399b93802610dcf574ff64bcb7677572cd028c1
+Subproject commit a32fe104c0290bc01a7ee73d50b568e8d9ded931
diff --git a/src/Extension/H264.h b/src/Extension/H264.h
index 400f5474..54e28e07 100644
--- a/src/Extension/H264.h
+++ b/src/Extension/H264.h
@@ -80,13 +80,11 @@ public:
     }
 
     bool keyFrame() const override {
-        return type == NAL_IDR;
+        return H264_TYPE(buffer[iPrefixSize]) == H264Frame::NAL_IDR;
     }
 public:
-    uint16_t sequence;
     uint32_t timeStamp;
     uint32_t ptsStamp = 0;
-    unsigned char type;
     string buffer;
     uint32_t iPrefixSize = 4;
 };
@@ -326,7 +324,6 @@ private:
 
         if(!_sps.empty()){
             auto spsFrame = std::make_shared<H264Frame>();
-            spsFrame->type = H264Frame::NAL_SPS;
             spsFrame->iPrefixSize = 4;
             spsFrame->buffer.assign("\x0\x0\x0\x1",4);
             spsFrame->buffer.append(_sps);
@@ -336,7 +333,6 @@ private:
 
         if(!_pps.empty()){
             auto ppsFrame = std::make_shared<H264Frame>();
-            ppsFrame->type = H264Frame::NAL_PPS;
             ppsFrame->iPrefixSize = 4;
             ppsFrame->buffer.assign("\x0\x0\x0\x1",4);
             ppsFrame->buffer.append(_pps);
diff --git a/src/Extension/H264Rtmp.cpp b/src/Extension/H264Rtmp.cpp
index 9ff10e27..2f56b9e6 100644
--- a/src/Extension/H264Rtmp.cpp
+++ b/src/Extension/H264Rtmp.cpp
@@ -80,7 +80,6 @@ bool H264RtmpDecoder::decodeRtmp(const RtmpPacket::Ptr &pkt) {
 
 inline void H264RtmpDecoder::onGetH264(const char* pcData, int iLen, uint32_t dts,uint32_t pts) {
 #if 1
-    _h264frame->type = H264_TYPE(pcData[0]);
     _h264frame->timeStamp = dts;
     _h264frame->ptsStamp = pts;
     _h264frame->buffer.assign("\x0\x0\x0\x1", 4);  //添加264头
diff --git a/src/Extension/H264Rtp.cpp b/src/Extension/H264Rtp.cpp
index 7dd58c47..51581c6c 100644
--- a/src/Extension/H264Rtp.cpp
+++ b/src/Extension/H264Rtp.cpp
@@ -100,12 +100,10 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
         //a full frame
         _h264frame->buffer.assign("\x0\x0\x0\x1", 4);
         _h264frame->buffer.append((char *)frame, length);
-        _h264frame->type = nal.type;
         _h264frame->timeStamp = rtppack->timeStamp;
-        _h264frame->sequence = rtppack->sequence;
-        auto isIDR = _h264frame->type == H264Frame::NAL_IDR;
+        auto key = _h264frame->keyFrame();
         onGetH264(_h264frame);
-        return (isIDR); //i frame
+        return (key); //i frame
     }
 
     switch (nal.type){
@@ -131,9 +129,7 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
                     MakeNalu(ptr[0], nal);
                     _h264frame->buffer.assign("\x0\x0\x0\x1", 4);
                     _h264frame->buffer.append((char *)ptr, len);
-                    _h264frame->type = nal.type;
                     _h264frame->timeStamp = rtppack->timeStamp;
-                    _h264frame->sequence = rtppack->sequence;
                     if(nal.type == H264Frame::NAL_IDR){
                         haveIDR = true;
                     }
@@ -148,35 +144,39 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
             //FU-A
             FU fu;
             MakeFU(frame[1], fu);
-            if (fu.S == 1) {
-                //FU-A start
+            if (fu.S) {
+                //该帧的第一个rtp包
                 char tmp = (nal.forbidden_zero_bit << 7 | nal.nal_ref_idc << 5 | fu.type);
                 _h264frame->buffer.assign("\x0\x0\x0\x1", 4);
                 _h264frame->buffer.push_back(tmp);
                 _h264frame->buffer.append((char *)frame + 2, length - 2);
-                _h264frame->type = fu.type;
                 _h264frame->timeStamp = rtppack->timeStamp;
-                _h264frame->sequence = rtppack->sequence;
-                return (_h264frame->type == H264Frame::NAL_IDR); //i frame
+                //该函数return时，保存下当前sequence,以便下次对比seq是否连续
+                _lastSeq = rtppack->sequence;
+                return _h264frame->keyFrame();
             }
 
-            if (rtppack->sequence != (uint16_t)(_h264frame->sequence + 1)) {
+            if (rtppack->sequence != _lastSeq + 1 && rtppack->sequence != 0) {
+                //中间的或末尾的rtp包，其seq必须连续(如果回环了则判定为连续)，否则说明rtp丢包，那么该帧不完整，必须得丢弃
                 _h264frame->buffer.clear();
-                WarnL << "丢包,帧废弃:" << rtppack->sequence << "," << _h264frame->sequence;
+                WarnL << "rtp sequence不连续: " << rtppack->sequence << " != " << _lastSeq << " + 1,该帧被废弃";
                 return false;
             }
-            _h264frame->sequence = rtppack->sequence;
-            if (fu.E == 1) {
-                //FU-A end
+
+            if (!fu.E) {
+                //该帧的中间rtp包
                 _h264frame->buffer.append((char *)frame + 2, length - 2);
-                _h264frame->timeStamp = rtppack->timeStamp;
-                auto isIDR = _h264frame->type == H264Frame::NAL_IDR;
-                onGetH264(_h264frame);
-                return isIDR;
+                //该函数return时，保存下当前sequence,以便下次对比seq是否连续
+                _lastSeq = rtppack->sequence;
+                return false;
             }
-            //FU-A mid
+
+            //该帧最后一个rtp包
             _h264frame->buffer.append((char *)frame + 2, length - 2);
-            return false;
+            _h264frame->timeStamp = rtppack->timeStamp;
+            auto key = _h264frame->keyFrame();
+            onGetH264(_h264frame);
+            return key;
         }
 
         default:{
@@ -195,10 +195,8 @@ bool H264RtpDecoder::decodeRtp(const RtpPacket::Ptr &rtppack) {
 
 void H264RtpDecoder::onGetH264(const H264Frame::Ptr &frame) {
     //写入环形缓存
-    auto lastSeq = _h264frame->sequence;
     RtpCodec::inputFrame(frame);
     _h264frame = obtainFrame();
-    _h264frame->sequence = lastSeq;
 }
 
 
diff --git a/src/Extension/H264Rtp.h b/src/Extension/H264Rtp.h
index 4719fe3a..09f2346d 100644
--- a/src/Extension/H264Rtp.h
+++ b/src/Extension/H264Rtp.h
@@ -64,6 +64,7 @@ private:
     H264Frame::Ptr obtainFrame();
 private:
     H264Frame::Ptr _h264frame;
+    int _lastSeq = 0;
 };
 
 /**