diff --git a/src/RtspMuxer/H264RtpCodec.cpp b/src/RtspMuxer/H264RtpCodec.cpp
index 1bfca2d3..8c35eed3 100644
--- a/src/RtspMuxer/H264RtpCodec.cpp
+++ b/src/RtspMuxer/H264RtpCodec.cpp
@@ -206,27 +206,25 @@ void H264RtpEncoder::inputFrame(const Frame::Ptr &frame) {
                 iSize = iLen - nOffset;
                 mark = true;
                 s_e_r_type = s_e_r_End + naluType;
+            } else  if (bFirst) {
+                s_e_r_type = s_e_r_Start + naluType;
             } else {
-                if (bFirst == true) {
-                    s_e_r_type = s_e_r_Start + naluType;
-                    bFirst = false;
-                } else {
-                    s_e_r_type = s_e_r_Mid + naluType;
-                }
+                s_e_r_type = s_e_r_Mid + naluType;
             }
             memcpy(_aucSectionBuf, &f_nri_type, 1);
             memcpy(_aucSectionBuf + 1, &s_e_r_type, 1);
             memcpy(_aucSectionBuf + 2, (unsigned char *) pcData + nOffset, iSize);
             nOffset += iSize;
-            makeH264Rtp(naluType,_aucSectionBuf, iSize + 2, mark, uiStamp);
+            makeH264Rtp(naluType,_aucSectionBuf, iSize + 2, mark,bFirst, uiStamp);
+            bFirst = false;
         }
     } else {
-        makeH264Rtp(naluType,pcData, iLen, true, uiStamp);
+        makeH264Rtp(naluType,pcData, iLen, true, true, uiStamp);
     }
 }
 
-void H264RtpEncoder::makeH264Rtp(int nal_type,const void* data, unsigned int len, bool mark, uint32_t uiStamp) {
-    RtpCodec::inputRtp(makeRtp(getTrackType(),data,len,mark,uiStamp),nal_type == H264Frame::NAL_SPS);
+void H264RtpEncoder::makeH264Rtp(int nal_type,const void* data, unsigned int len, bool mark, bool first_packet, uint32_t uiStamp) {
+    RtpCodec::inputRtp(makeRtp(getTrackType(),data,len,mark,uiStamp),first_packet && nal_type == H264Frame::NAL_IDR);
 }
 
 }//namespace mediakit
\ No newline at end of file
diff --git a/src/RtspMuxer/H264RtpCodec.h b/src/RtspMuxer/H264RtpCodec.h
index d12a38e7..4a7a33d4 100644
--- a/src/RtspMuxer/H264RtpCodec.h
+++ b/src/RtspMuxer/H264RtpCodec.h
@@ -93,7 +93,7 @@ public:
      */
     void inputFrame(const Frame::Ptr &frame) override;
 private:
-    void makeH264Rtp(int nal_type,const void *pData, unsigned int uiLen, bool bMark, uint32_t uiStamp);
+    void makeH264Rtp(int nal_type,const void *pData, unsigned int uiLen, bool bMark,  bool first_packet, uint32_t uiStamp);
 private:
     unsigned char _aucSectionBuf[1600];
 };
diff --git a/src/RtspMuxer/H265RtpCodec.cpp b/src/RtspMuxer/H265RtpCodec.cpp
index 307f5778..7ba34c84 100644
--- a/src/RtspMuxer/H265RtpCodec.cpp
+++ b/src/RtspMuxer/H265RtpCodec.cpp
@@ -188,29 +188,28 @@ void H265RtpEncoder::inputFrame(const Frame::Ptr &frame) {
                 maxSize = iLen - nOffset;
                 mark = true;
                 s_e_type = 1 << 6 | naluType;
-            } else {
-                if (bFirst == true) {
+            } else if (bFirst) {
                     s_e_type = 1 << 7 | naluType;
-                    bFirst = false;
-                } else {
-                    s_e_type = naluType;
-                }
+            } else {
+                s_e_type = naluType;
             }
+
             //FU type
             _aucSectionBuf[0] = 49 << 1;
             _aucSectionBuf[1] = 1;
             _aucSectionBuf[2] = s_e_type;
             memcpy(_aucSectionBuf + 3, pcData + nOffset, maxSize);
             nOffset += maxSize;
-            makeH265Rtp(naluType,_aucSectionBuf, maxSize + 3, mark, uiStamp);
+            makeH265Rtp(naluType,_aucSectionBuf, maxSize + 3, mark,bFirst, uiStamp);
+            bFirst = false;
         }
     } else {
-        makeH265Rtp(naluType,pcData, iLen, true, uiStamp);
+        makeH265Rtp(naluType,pcData, iLen, true, true, uiStamp);
     }
 }
 
-void H265RtpEncoder::makeH265Rtp(int nal_type,const void* data, unsigned int len, bool mark, uint32_t uiStamp) {
-    RtpCodec::inputRtp(makeRtp(getTrackType(),data,len,mark,uiStamp),nal_type == H265Frame::NAL_VPS);
+void H265RtpEncoder::makeH265Rtp(int nal_type,const void* data, unsigned int len, bool mark, bool first_packet, uint32_t uiStamp) {
+    RtpCodec::inputRtp(makeRtp(getTrackType(),data,len,mark,uiStamp),first_packet && H265Frame::isKeyFrame(nal_type));
 }
 
 }//namespace mediakit
\ No newline at end of file
diff --git a/src/RtspMuxer/H265RtpCodec.h b/src/RtspMuxer/H265RtpCodec.h
index 9c4fb305..1c5fe656 100644
--- a/src/RtspMuxer/H265RtpCodec.h
+++ b/src/RtspMuxer/H265RtpCodec.h
@@ -94,7 +94,7 @@ public:
      */
     void inputFrame(const Frame::Ptr &frame) override;
 private:
-    void makeH265Rtp(int nal_type,const void *pData, unsigned int uiLen, bool bMark, uint32_t uiStamp);
+    void makeH265Rtp(int nal_type,const void *pData, unsigned int uiLen, bool bMark, bool first_packet,uint32_t uiStamp);
 private:
     unsigned char _aucSectionBuf[1600];
 };