diff --git a/framework/base/media/AVAFPacket.cpp b/framework/base/media/AVAFPacket.cpp
index 604dfde7f..7a3c4b46e 100644
--- a/framework/base/media/AVAFPacket.cpp
+++ b/framework/base/media/AVAFPacket.cpp
@@ -31,7 +31,7 @@ void AVAFPacket::copyInfo()
     mInfo.pos = mpkt->pos;
 }
 
-AVAFPacket::AVAFPacket(AVPacket &pkt)
+AVAFPacket::AVAFPacket(AVPacket &pkt, bool isProtected) : mIsProtected(isProtected)
 {
     mpkt = av_packet_alloc();
     av_init_packet(mpkt);
@@ -39,7 +39,7 @@ AVAFPacket::AVAFPacket(AVPacket &pkt)
     copyInfo();
 }
 
-AVAFPacket::AVAFPacket(AVPacket *pkt)
+AVAFPacket::AVAFPacket(AVPacket *pkt, bool isProtected) : mIsProtected(isProtected)
 {
     mpkt = av_packet_alloc();
     av_init_packet(mpkt);
@@ -47,7 +47,7 @@ AVAFPacket::AVAFPacket(AVPacket *pkt)
     copyInfo();
 }
 
-AVAFPacket::AVAFPacket(AVPacket **pkt)
+AVAFPacket::AVAFPacket(AVPacket **pkt, bool isProtected) : mIsProtected(isProtected)
 {
     mpkt = *pkt;
     *pkt = nullptr;
@@ -66,7 +66,7 @@ uint8_t *AVAFPacket::getData()
 
 unique_ptr<IAFPacket> AVAFPacket::clone()
 {
-    return unique_ptr<IAFPacket>(new AVAFPacket(mpkt));
+    return unique_ptr<IAFPacket>(new AVAFPacket(mpkt, mIsProtected));
 }
 
 int64_t AVAFPacket::getSize()
diff --git a/framework/base/media/AVAFPacket.h b/framework/base/media/AVAFPacket.h
index 4ca4cbff0..21a888319 100644
--- a/framework/base/media/AVAFPacket.h
+++ b/framework/base/media/AVAFPacket.h
@@ -14,11 +14,11 @@ extern "C" {
 
 class AVAFPacket : public IAFPacket {
 public:
-    attribute_deprecated explicit AVAFPacket(AVPacket &pkt);
+    attribute_deprecated explicit AVAFPacket(AVPacket &pkt, bool isProtected = false);
 
-    explicit AVAFPacket(AVPacket *pkt);
+    explicit AVAFPacket(AVPacket *pkt, bool isProtected = false);
 
-    explicit AVAFPacket(AVPacket **pkt);
+    explicit AVAFPacket(AVPacket **pkt, bool isProtected = false);
 
     ~AVAFPacket() override;
 
@@ -26,6 +26,11 @@ class AVAFPacket : public IAFPacket {
 
     uint8_t *getData() override;
 
+    bool isProtected() override
+    {
+        return mIsProtected;
+    }
+
     std::unique_ptr<IAFPacket> clone() override;
 
     int64_t getSize() override;
@@ -36,6 +41,7 @@ class AVAFPacket : public IAFPacket {
 
 private:
     AVPacket *mpkt{nullptr};
+    bool mIsProtected;
 
     void copyInfo();
 };
diff --git a/framework/base/media/IAFPacket.h b/framework/base/media/IAFPacket.h
index 99515a028..9ab951c96 100644
--- a/framework/base/media/IAFPacket.h
+++ b/framework/base/media/IAFPacket.h
@@ -75,6 +75,11 @@ class CICADA_CPLUS_EXTERN IAFPacket {
         return mbDiscard;
     }
 
+    virtual bool isProtected()
+    {
+        return false;
+    }
+
     packetInfo &getInfo();
 
     void setExtraData(const uint8_t *extra_data, int extra_data_size)
diff --git a/framework/demuxer/avFormatDemuxer.cpp b/framework/demuxer/avFormatDemuxer.cpp
index 094b6015b..c230df064 100644
--- a/framework/demuxer/avFormatDemuxer.cpp
+++ b/framework/demuxer/avFormatDemuxer.cpp
@@ -344,7 +344,7 @@ namespace Cicada {
             pkt->duration = av_rescale_q(pkt->duration, mCtx->streams[pkt->stream_index]->time_base, av_get_time_base_q());
         }
 
-        packet = unique_ptr<IAFPacket>(new AVAFPacket(&pkt));
+        packet = unique_ptr<IAFPacket>(new AVAFPacket(&pkt, mSecretDemxuer));
 
         if (needUpdateExtraData) {
             packet->setExtraData(new_extradata, new_extradata_size);
diff --git a/framework/demuxer/avFormatDemuxer.h b/framework/demuxer/avFormatDemuxer.h
index 0dffcd56c..47387f957 100644
--- a/framework/demuxer/avFormatDemuxer.h
+++ b/framework/demuxer/avFormatDemuxer.h
@@ -120,6 +120,7 @@ namespace Cicada {
         std::string mProbeString{};
         AVFormatContext *mCtx = nullptr;
         int MAX_QUEUE_SIZE = 60; // about 500ms  video and audio packet
+        bool mSecretDemxuer{false};
 
     private:
         std::atomic_bool mInterrupted{false};