diff --git a/trunk/src/core/srs_core_log.hpp b/trunk/src/core/srs_core_log.hpp
index 262add9ab..d2627f6cf 100755
--- a/trunk/src/core/srs_core_log.hpp
+++ b/trunk/src/core/srs_core_log.hpp
@@ -74,9 +74,11 @@ extern ILogContext* log_context;
     #define srs_error(msg, ...)   printf("[%s][%d][error][%s] ", log_context->format_time(), log_context->get_id(), __PRETTY_FUNCTION__);printf(msg, ##__VA_ARGS__);printf(" errno=%d(%s)", errno, strerror(errno));printf("\n")
 #endif
 
-#if 0
+#if 1
 	#undef srs_verbose
 	#define srs_verbose(msg, ...) (void)0
+#endif
+#if 1
 	#undef srs_info
 	#define srs_info(msg, ...) (void)0
 #endif
diff --git a/trunk/src/core/srs_core_source.cpp b/trunk/src/core/srs_core_source.cpp
index afbc8e77c..5236ac5fb 100755
--- a/trunk/src/core/srs_core_source.cpp
+++ b/trunk/src/core/srs_core_source.cpp
@@ -94,6 +94,8 @@ SrsSource::SrsSource(std::string _stream_url)
 {
 	stream_url = _stream_url;
 	cache_metadata = NULL;
+	cache_sh_video = NULL;
+	cache_sh_audio = NULL;
 }
 
 SrsSource::~SrsSource()
@@ -106,6 +108,8 @@ SrsSource::~SrsSource()
 	consumers.clear();
 	
 	srs_freep(cache_metadata);
+	srs_freep(cache_sh_video);
+	srs_freep(cache_sh_audio);
 }
 
 int SrsSource::on_meta_data(SrsCommonMessage* msg, SrsOnMetaDataPacket* metadata)
@@ -183,6 +187,11 @@ int SrsSource::on_audio(SrsCommonMessage* audio)
 		}
 	}
 	srs_info("dispatch audio success.");
+
+	if (!cache_sh_audio) {
+		srs_freep(cache_sh_audio);
+		cache_sh_audio = msg->copy();
+	}
 	
 	return ret;
 }
@@ -213,20 +222,40 @@ int SrsSource::on_video(SrsCommonMessage* video)
 		}
 	}
 	srs_info("dispatch video success.");
+
+	if (!cache_sh_video) {
+		srs_freep(cache_sh_video);
+		cache_sh_video = msg->copy();
+	}
 	
 	return ret;
 }
 
  int SrsSource::create_consumer(SrsConsumer*& consumer)
 {
+	int ret = ERROR_SUCCESS;
+	
 	consumer = new SrsConsumer();
 	consumers.push_back(consumer);
 
-	if (!cache_metadata) {
-		srs_info("no metadata found.");
-		return ERROR_SUCCESS;
+	if (cache_metadata && (ret = consumer->enqueue(cache_metadata->copy())) != ERROR_SUCCESS) {
+		srs_error("dispatch metadata failed. ret=%d", ret);
+		return ret;
 	}
+	srs_info("dispatch metadata success");
 	
-	return consumer->enqueue(cache_metadata->copy());
+	if (cache_sh_video && (ret = consumer->enqueue(cache_sh_video->copy())) != ERROR_SUCCESS) {
+		srs_error("dispatch video sequence header failed. ret=%d", ret);
+		return ret;
+	}
+	srs_info("dispatch video sequence header success");
+	
+	if (cache_sh_audio && (ret = consumer->enqueue(cache_sh_audio->copy())) != ERROR_SUCCESS) {
+		srs_error("dispatch audio sequence header failed. ret=%d", ret);
+		return ret;
+	}
+	srs_info("dispatch audio sequence header success");
+	
+	return ret;
 }
 
diff --git a/trunk/src/core/srs_core_source.hpp b/trunk/src/core/srs_core_source.hpp
index 22044357c..0cf0ac524 100755
--- a/trunk/src/core/srs_core_source.hpp
+++ b/trunk/src/core/srs_core_source.hpp
@@ -82,6 +82,10 @@ private:
 	std::vector<SrsConsumer*> consumers;
 private:
 	SrsSharedPtrMessage* cache_metadata;
+	// the cached video sequence header.
+	SrsSharedPtrMessage* cache_sh_video;
+	// the cached audio sequence header.
+	SrsSharedPtrMessage* cache_sh_audio;
 public:
 	SrsSource(std::string _stream_url);
 	virtual ~SrsSource();