diff --git a/src/Extension/H264.h b/src/Extension/H264.h
index 08fea085..df0ac71c 100644
--- a/src/Extension/H264.h
+++ b/src/Extension/H264.h
@@ -1,4 +1,4 @@
-/*
+/*
  * MIT License
  *
  * Copyright (c) 2016-2019 xiongziliang <771730766@qq.com>
@@ -313,10 +313,10 @@ private:
             if(!_spsFrame){
                 _spsFrame = std::make_shared<H264Frame>();
                 _spsFrame->type = H264Frame::NAL_SPS;
-                _spsFrame->buffer.assign("\x0\x0\x0\x1",4);
-                _spsFrame->buffer.append(_sps);
                 _spsFrame->iPrefixSize = 4;
             }
+            _spsFrame->buffer.assign("\x0\x0\x0\x1",4);
+            _spsFrame->buffer.append(_sps);
             _spsFrame->timeStamp = frame->stamp();
             VideoTrack::inputFrame(_spsFrame);
         }
@@ -325,10 +325,10 @@ private:
             if(!_ppsFrame) {
                 _ppsFrame = std::make_shared<H264Frame>();
                 _ppsFrame->type = H264Frame::NAL_PPS;
-                _ppsFrame->buffer.assign("\x0\x0\x0\x1",4);
-                _ppsFrame->buffer.append(_pps);
                 _ppsFrame->iPrefixSize = 4;
             }
+            _ppsFrame->buffer.assign("\x0\x0\x0\x1",4);
+            _ppsFrame->buffer.append(_pps);
             _ppsFrame->timeStamp = frame->stamp();
             VideoTrack::inputFrame(_ppsFrame);
         }
diff --git a/src/Extension/H265.h b/src/Extension/H265.h
index d4fea041..e3f82deb 100644
--- a/src/Extension/H265.h
+++ b/src/Extension/H265.h
@@ -263,10 +263,10 @@ private:
             if (!_vpsFrame) {
                 _vpsFrame = std::make_shared<H265Frame>();
                 _vpsFrame->type = H265Frame::NAL_VPS;
-                _vpsFrame->buffer.assign("\x0\x0\x0\x1", 4);
-                _vpsFrame->buffer.append(_vps);
                 _vpsFrame->iPrefixSize = 4;
             }
+            _vpsFrame->buffer.assign("\x0\x0\x0\x1", 4);
+            _vpsFrame->buffer.append(_vps);
             _vpsFrame->timeStamp = frame->stamp();
             VideoTrack::inputFrame(_vpsFrame);
         }
@@ -274,10 +274,10 @@ private:
             if (!_spsFrame) {
                 _spsFrame = std::make_shared<H265Frame>();
                 _spsFrame->type = H265Frame::NAL_SPS;
-                _spsFrame->buffer.assign("\x0\x0\x0\x1", 4);
-                _spsFrame->buffer.append(_sps);
                 _spsFrame->iPrefixSize = 4;
             }
+            _spsFrame->buffer.assign("\x0\x0\x0\x1", 4);
+            _spsFrame->buffer.append(_sps);
             _spsFrame->timeStamp = frame->stamp();
             VideoTrack::inputFrame(_spsFrame);
         }
@@ -286,10 +286,10 @@ private:
             if (!_ppsFrame) {
                 _ppsFrame = std::make_shared<H265Frame>();
                 _ppsFrame->type = H265Frame::NAL_PPS;
-                _ppsFrame->buffer.assign("\x0\x0\x0\x1", 4);
-                _ppsFrame->buffer.append(_pps);
                 _ppsFrame->iPrefixSize = 4;
             }
+            _ppsFrame->buffer.assign("\x0\x0\x0\x1", 4);
+            _ppsFrame->buffer.append(_pps);
             _ppsFrame->timeStamp = frame->stamp();
             VideoTrack::inputFrame(_ppsFrame);
         }