diff --git a/mediaPlayer/SMP_DCAManager.cpp b/mediaPlayer/SMP_DCAManager.cpp
index 7e465bd1e..285e64f1a 100644
--- a/mediaPlayer/SMP_DCAManager.cpp
+++ b/mediaPlayer/SMP_DCAManager.cpp
@@ -24,12 +24,17 @@ void SMP_DCAObserver::setListener(mediaPlayerDCAObserverListener *listener)
 {
     mListener = listener;
 }
+void SMP_DCAObserver::hello()
+{
+    onEvent(0, "hello");
+}
 void SMP_DCAManager::createObservers()
 {
     if (mDemuxerObserver == nullptr && mPlayer.mDemuxerService && mPlayer.mDemuxerService->getDemuxerHandle()) {
         mDemuxerObserver = static_cast<unique_ptr<SMP_DCAObserver>>(
                 new SMP_DCAObserver("demuxer", mPlayer.mDemuxerService->getDemuxerHandle()->getName(), mPlayer.mDemuxerService));
         mDemuxerObserver->setListener(this);
+        mDemuxerObserver->hello();
         mPlayer.mDemuxerService->getDemuxerHandle()->setDCAObserver(mDemuxerObserver.get());
     }
 }
diff --git a/mediaPlayer/SMP_DCAManager.h b/mediaPlayer/SMP_DCAManager.h
index fd3f569e4..b17e3ab95 100644
--- a/mediaPlayer/SMP_DCAManager.h
+++ b/mediaPlayer/SMP_DCAManager.h
@@ -25,6 +25,8 @@ namespace Cicada {
         {}
         void setListener(mediaPlayerDCAObserverListener *listener);
 
+        void hello();
+
     private:
         void onEvent(int level, const std::string &content) override;