diff --git a/src/Extension/CommonRtp.cpp b/src/Extension/CommonRtp.cpp
index 9ba9b682..68767a6f 100644
--- a/src/Extension/CommonRtp.cpp
+++ b/src/Extension/CommonRtp.cpp
@@ -34,10 +34,10 @@ bool CommonRtpDecoder::inputRtp(const RtpPacket::Ptr &rtp, bool){
         return false;
     }
     auto payload = rtp->getPayload();
-    auto stamp = rtp->getStampMS();
+    auto stamp = rtp->getStamp();
     auto seq = rtp->getSeq();
 
-    if (_frame->_dts != stamp || _frame->_buffer.size() > _max_frame_size) {
+    if (_last_stamp != stamp || _frame->_buffer.size() > _max_frame_size) {
         //时间戳发生变化或者缓存超过MAX_FRAME_SIZE，则清空上帧数据
         if (!_frame->_buffer.empty()) {
             //有有效帧，则输出
@@ -46,7 +46,8 @@ bool CommonRtpDecoder::inputRtp(const RtpPacket::Ptr &rtp, bool){
 
         //新的一帧数据
         obtainFrame();
-        _frame->_dts = stamp;
+        _frame->_dts = rtp->getStampMS();
+        _last_stamp = stamp;
         _drop_flag = false;
     } else if (_last_seq != 0 && (uint16_t)(_last_seq + 1) != seq) {
         //时间戳未发生变化，但是seq却不连续，说明中间rtp丢包了，那么整帧应该废弃
diff --git a/src/Extension/CommonRtp.h b/src/Extension/CommonRtp.h
index 7df29af8..6553207e 100644
--- a/src/Extension/CommonRtp.h
+++ b/src/Extension/CommonRtp.h
@@ -50,6 +50,7 @@ private:
 private:
     bool _drop_flag = false;
     uint16_t _last_seq = 0;
+    uint64_t _last_stamp = 0;
     size_t _max_frame_size;
     CodecId _codec;
     FrameImp::Ptr _frame;