diff --git a/codec/decoder/core/inc/decoder_context.h b/codec/decoder/core/inc/decoder_context.h
index 5cbd4876..9306f6b4 100644
--- a/codec/decoder/core/inc/decoder_context.h
+++ b/codec/decoder/core/inc/decoder_context.h
@@ -367,6 +367,7 @@ typedef struct TagWelsDecoderContext {
 //for Parse only
   bool bParseOnly;
   bool bFramePending;
+  bool bFrameFinish;
   int32_t iNalNum;
   int32_t iNalLenInByte[MAX_NAL_UNITS_IN_LAYER];
   SSpsBsInfo sSpsBsInfo [MAX_SPS_COUNT];
diff --git a/codec/decoder/core/src/decoder.cpp b/codec/decoder/core/src/decoder.cpp
index d2808a5b..92d091e2 100644
--- a/codec/decoder/core/src/decoder.cpp
+++ b/codec/decoder/core/src/decoder.cpp
@@ -487,6 +487,7 @@ int32_t WelsOpenDecoder (PWelsDecoderContext pCtx) {
   pCtx->bNewSeqBegin = true;
   pCtx->bPrintFrameErrorTraceFlag = true;
   pCtx->iIgnoredErrorInfoPacketCount = 0;
+  pCtx->bFrameFinish = true;
   return iRet;
 }
 
diff --git a/codec/decoder/core/src/decoder_core.cpp b/codec/decoder/core/src/decoder_core.cpp
index b42c18e2..5cca59d9 100644
--- a/codec/decoder/core/src/decoder_core.cpp
+++ b/codec/decoder/core/src/decoder_core.cpp
@@ -74,7 +74,6 @@ static inline int32_t DecodeFrameConstruction (PWelsDecoderContext pCtx, uint8_t
 
   if (pCtx->bParseOnly) { //should exit for parse only to prevent access NULL pDstInfo
     PAccessUnit pCurAu = pCtx->pAccessUnitList;
-    static bool bFirstIDR = true;
     if (dsErrorFree == pCtx->iErrorCode) { //correct decoding, add to data buffer
       SParserBsInfo* pParser = pCtx->pParserBsInfo;
       SNalUnit* pCurNal = NULL;
@@ -94,7 +93,7 @@ static inline int32_t DecodeFrameConstruction (PWelsDecoderContext pCtx, uint8_t
       pParser->iSpsHeightInPixel = (pCtx->pSps->iMbHeight << 4);
 
       if (pCurAu->pNalUnitsList [iIdx]->sNalHeaderExt.bIdrFlag) { //IDR
-        if (bFirstIDR) { //add required sps/pps
+        if (pCtx->bFrameFinish) { //add required sps/pps
           bool bSubSps = (NAL_UNIT_CODED_SLICE_EXT == pCurAu->pNalUnitsList [iIdx]->sNalHeaderExt.sNalUnitHeader.eNalUnitType);
           SSpsBsInfo* pSpsBs = NULL;
           SPpsBsInfo* pPpsBs = NULL;
@@ -111,10 +110,10 @@ static inline int32_t DecodeFrameConstruction (PWelsDecoderContext pCtx, uint8_t
           memcpy (pDstBuf, pPpsBs->pPpsBsBuf, pPpsBs->uiPpsBsLen);
           pParser->iNalLenInByte [pParser->iNalNum ++] = pPpsBs->uiPpsBsLen;
           pDstBuf += pPpsBs->uiPpsBsLen;
-          bFirstIDR = false;
+          pCtx->bFrameFinish = false;
         }
       } else { //IDR required SPS, PPS
-        bFirstIDR = true;
+        pCtx->bFrameFinish = true;
       }
       //then VCL data re-write
       while (iIdx <= iEndIdx) {
@@ -2364,6 +2363,7 @@ bool CheckAndFinishLastPic (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferIn
       }
     } else if (pCtx->bParseOnly) { //clear parse only internal data status
       pCtx->pParserBsInfo->iNalNum = 0;
+      pCtx->bFrameFinish = true; //clear frame pending status here!
     } else {
       if (DecodeFrameConstruction (pCtx, ppDst, pDstInfo)) {
         pCtx->pDec = NULL;