diff --git a/mpp/codec/mpp_dec.cpp b/mpp/codec/mpp_dec.cpp
index 3c1d9d4f..5b70aa81 100644
--- a/mpp/codec/mpp_dec.cpp
+++ b/mpp/codec/mpp_dec.cpp
@@ -287,8 +287,7 @@ static MPP_RET try_proc_dec_task(Mpp *mpp, DecTask *task)
      */
     if (!task->status.curr_task_rdy) {
         parser_prepare(dec->parser, dec->mpp_pkt_in, task_dec);
-        if (0 == mpp_packet_get_length(dec->mpp_pkt_in)) {
-            mpp_free(mpp_packet_get_data(dec->mpp_pkt_in));
+        if (0 == mpp_packet_get_length(dec->mpp_pkt_in)) {     
             mpp_packet_deinit(&dec->mpp_pkt_in);
             dec->mpp_pkt_in = NULL;
         }
diff --git a/mpp/mpp.cpp b/mpp/mpp.cpp
index cf58f380..6b471976 100644
--- a/mpp/mpp.cpp
+++ b/mpp/mpp.cpp
@@ -307,7 +307,7 @@ MPP_RET Mpp::reset()
     MppPacket mpkt = NULL;
     RK_U32 flags = 0;
     mPackets->lock();
-    if(mPackets->list_size()){
+    if (mPackets->list_size()) {
         mPackets->del_at_head(&mpkt, sizeof(mpkt));
     }
     mPackets->flush();
@@ -329,13 +329,12 @@ MPP_RET Mpp::reset()
         mpp_enc_reset(mEnc);
     }
     mThreadCodec->unlock(THREAD_RESET);
-    if(mpkt != NULL){
+    if (mpkt != NULL) {
         flags = mpp_packet_get_flag(mpkt);
-        mpp_log("flags = %d",flags);
-        if(flags&MPP_PACKET_FLAG_EXTRA_DATA){ //avoid first packet is extara data was flushed & dec can work
+        mpp_log("flags = %d", flags);
+        if (flags & MPP_PACKET_FLAG_EXTRA_DATA) { //avoid first packet is extara data was flushed & dec can work
             put_packet(mpkt);
         }
-        mpp_free(mpp_packet_get_data(mpkt));
         mpp_packet_deinit(&mpkt);
         mpkt = NULL;
     }
diff --git a/mpp/mpp_packet.cpp b/mpp/mpp_packet.cpp
index ddf7a688..92811dc2 100644
--- a/mpp/mpp_packet.cpp
+++ b/mpp/mpp_packet.cpp
@@ -94,6 +94,7 @@ MPP_RET mpp_packet_copy_init(MppPacket *packet, const MppPacket src)
         memcpy(p, src, sizeof(*p));
         p->data = p->pos = data;
         p->size = p->length = size;
+        p->flag |= MPP_PACKET_FLAG_INTERNAL;
         if (size) {
             memcpy(data, ((MppPacketImpl *)src)->data, size);
         }
@@ -115,6 +116,9 @@ MPP_RET mpp_packet_deinit(MppPacket *packet)
 
     MppPacketImpl *p = (MppPacketImpl *)(*packet);
     check_mpp_packet_name(p);
+    if (p->flag & MPP_PACKET_FLAG_INTERNAL) {
+        mpp_free(p->data);
+    }
     mpp_free(p);
     *packet = NULL;
     return MPP_OK;
diff --git a/mpp/mpp_packet_impl.h b/mpp/mpp_packet_impl.h
index 3633d87e..fa98767b 100644
--- a/mpp/mpp_packet_impl.h
+++ b/mpp/mpp_packet_impl.h
@@ -22,6 +22,7 @@
 
 #define MPP_PACKET_FLAG_EOS             (0x00000001)
 #define MPP_PACKET_FLAG_EXTRA_DATA      (0x00000002)
+#define MPP_PACKET_FLAG_INTERNAL        (0x00000004)
 
 /*
  * mpp_packet_imp structure