diff --git a/trunk/src/core/srs_core_amf0.cpp b/trunk/src/core/srs_core_amf0.cpp
index 7b53dead3..909f2d7c6 100755
--- a/trunk/src/core/srs_core_amf0.cpp
+++ b/trunk/src/core/srs_core_amf0.cpp
@@ -89,6 +89,11 @@ bool SrsAmf0Any::is_null()
 	return marker == RTMP_AMF0_Null;
 }
 
+bool SrsAmf0Any::is_undefined()
+{
+	return marker == RTMP_AMF0_Undefined;
+}
+
 bool SrsAmf0Any::is_object()
 {
 	return marker == RTMP_AMF0_Object;
@@ -145,6 +150,15 @@ SrsAmf0Null::~SrsAmf0Null()
 {
 }
 
+SrsAmf0Undefined::SrsAmf0Undefined()
+{
+	marker = RTMP_AMF0_Undefined;
+}
+
+SrsAmf0Undefined::~SrsAmf0Undefined()
+{
+}
+
 SrsAmf0ObjectEOF::SrsAmf0ObjectEOF()
 {
 	marker = RTMP_AMF0_ObjectEnd;
@@ -523,6 +537,45 @@ int srs_amf0_write_null(SrsStream* stream)
 	return ret;
 }
 
+int srs_amf0_read_undefined(SrsStream* stream)
+{
+	int ret = ERROR_SUCCESS;
+	
+	// marker
+	if (!stream->require(1)) {
+		ret = ERROR_RTMP_AMF0_DECODE;
+		srs_error("amf0 read undefined marker failed. ret=%d", ret);
+		return ret;
+	}
+	
+	char marker = stream->read_1bytes();
+	if (marker != RTMP_AMF0_Undefined) {
+		ret = ERROR_RTMP_AMF0_DECODE;
+		srs_error("amf0 check undefined marker failed. "
+			"marker=%#x, required=%#x, ret=%d", marker, RTMP_AMF0_Undefined, ret);
+		return ret;
+	}
+	srs_verbose("amf0 read undefined success");
+	
+	return ret;
+}
+int srs_amf0_write_undefined(SrsStream* stream)
+{
+	int ret = ERROR_SUCCESS;
+	
+	// marker
+	if (!stream->require(1)) {
+		ret = ERROR_RTMP_AMF0_ENCODE;
+		srs_error("amf0 write undefined marker failed. ret=%d", ret);
+		return ret;
+	}
+	
+	stream->write_1bytes(RTMP_AMF0_Undefined);
+	srs_verbose("amf0 write undefined marker success");
+	
+	return ret;
+}
+
 int srs_amf0_read_any(SrsStream* stream, SrsAmf0Any*& value)
 {
 	int ret = ERROR_SUCCESS;
@@ -572,6 +625,10 @@ int srs_amf0_read_any(SrsStream* stream, SrsAmf0Any*& value)
 			value = new SrsAmf0Null();
 			return ret;
 		}
+		case RTMP_AMF0_Undefined: {
+			value = new SrsAmf0Undefined();
+			return ret;
+		}
 		case RTMP_AMF0_ObjectEnd: {
 			SrsAmf0ObjectEOF* p = NULL;
 			if ((ret = srs_amf0_read_object_eof(stream, p)) != ERROR_SUCCESS) {
@@ -628,6 +685,9 @@ int srs_amf0_write_any(SrsStream* stream, SrsAmf0Any* value)
 		case RTMP_AMF0_Null: {
 			return srs_amf0_write_null(stream);
 		}
+		case RTMP_AMF0_Undefined: {
+			return srs_amf0_write_undefined(stream);
+		}
 		case RTMP_AMF0_ObjectEnd: {
 			SrsAmf0ObjectEOF* p = srs_amf0_convert<SrsAmf0ObjectEOF>(value);
 			return srs_amf0_write_object_eof(stream, p);
@@ -676,6 +736,10 @@ int srs_amf0_get_any_size(SrsAmf0Any* value)
 			size += srs_amf0_get_null_size();
 			break;
 		}
+		case RTMP_AMF0_Undefined: {
+			size += srs_amf0_get_undefined_size();
+			break;
+		}
 		case RTMP_AMF0_ObjectEnd: {
 			size += srs_amf0_get_object_eof_size();
 			break;
@@ -1009,6 +1073,11 @@ int srs_amf0_get_null_size()
 	return 1;
 }
 
+int srs_amf0_get_undefined_size()
+{
+	return 1;
+}
+
 int srs_amf0_get_boolean_size()
 {
 	return 1 + 1;
diff --git a/trunk/src/core/srs_core_amf0.hpp b/trunk/src/core/srs_core_amf0.hpp
index 61cd38104..3624eacd0 100755
--- a/trunk/src/core/srs_core_amf0.hpp
+++ b/trunk/src/core/srs_core_amf0.hpp
@@ -55,6 +55,7 @@ struct SrsAmf0Any
 	virtual bool is_boolean();
 	virtual bool is_number();
 	virtual bool is_null();
+	virtual bool is_undefined();
 	virtual bool is_object();
 	virtual bool is_object_eof();
 	virtual bool is_ecma_array();
@@ -114,6 +115,17 @@ struct SrsAmf0Null : public SrsAmf0Any
 	virtual ~SrsAmf0Null();
 };
 
+/**
+* read amf0 undefined from stream.
+* 2.8 undefined Type
+* undefined-type = undefined-marker
+*/
+struct SrsAmf0Undefined : public SrsAmf0Any
+{
+	SrsAmf0Undefined();
+	virtual ~SrsAmf0Undefined();
+};
+
 /**
 * 2.11 Object End Type
 * object-end-type = UTF-8-empty object-end-marker
@@ -207,6 +219,14 @@ extern int srs_amf0_write_number(SrsStream* stream, double value);
 extern int srs_amf0_read_null(SrsStream* stream);
 extern int srs_amf0_write_null(SrsStream* stream);
 
+/**
+* read amf0 undefined from stream.
+* 2.8 undefined Type
+* undefined-type = undefined-marker
+*/
+extern int srs_amf0_read_undefined(SrsStream* stream);
+extern int srs_amf0_write_undefined(SrsStream* stream);
+
 /**
 * read amf0 object from stream.
 * 2.5 Object Type
@@ -233,6 +253,7 @@ extern int srs_amf0_get_utf8_size(std::string value);
 extern int srs_amf0_get_string_size(std::string value);
 extern int srs_amf0_get_number_size();
 extern int srs_amf0_get_null_size();
+extern int srs_amf0_get_undefined_size();
 extern int srs_amf0_get_boolean_size();
 extern int srs_amf0_get_object_size(SrsAmf0Object* obj);
 extern int srs_amf0_get_ecma_array_size(SrsASrsAmf0EcmaArray* arr);
diff --git a/trunk/src/core/srs_core_protocol.cpp b/trunk/src/core/srs_core_protocol.cpp
index fa1e54f84..b5c7eb610 100755
--- a/trunk/src/core/srs_core_protocol.cpp
+++ b/trunk/src/core/srs_core_protocol.cpp
@@ -197,6 +197,8 @@ messages.
 #define RTMP_AMF0_COMMAND_ON_BW_DONE		"onBWDone"
 #define RTMP_AMF0_COMMAND_ON_STATUS			"onStatus"
 #define RTMP_AMF0_COMMAND_RESULT			"_result"
+#define RTMP_AMF0_COMMAND_RELEASE_STREAM	"releaseStream"
+#define RTMP_AMF0_COMMAND_FC_PUBLISH		"FCPublish"
 #define RTMP_AMF0_DATA_SAMPLE_ACCESS		"|RtmpSampleAccess"
 
 /****************************************************************************
@@ -952,6 +954,14 @@ int SrsMessage::decode_packet()
 			srs_info("decode the AMF0/AMF3 command(paly message).");
 			packet = new SrsPlayPacket();
 			return packet->decode(stream);
+		} else if(command == RTMP_AMF0_COMMAND_RELEASE_STREAM) {
+			srs_info("decode the AMF0/AMF3 command(FMLE releaseStream message).");
+			packet = new SrsFMLEStartPacket();
+			return packet->decode(stream);
+		} else if(command == RTMP_AMF0_COMMAND_FC_PUBLISH) {
+			srs_info("decode the AMF0/AMF3 command(FMLE FCPublish message).");
+			packet = new SrsFMLEStartPacket();
+			return packet->decode(stream);
 		}
 		
 		// default packet to drop message.
@@ -1351,6 +1361,119 @@ int SrsCreateStreamResPacket::encode_packet(SrsStream* stream)
 	return ret;
 }
 
+SrsFMLEStartPacket::SrsFMLEStartPacket()
+{
+	command_name = RTMP_AMF0_COMMAND_CREATE_STREAM;
+	transaction_id = 0;
+}
+
+SrsFMLEStartPacket::~SrsFMLEStartPacket()
+{
+}
+
+int SrsFMLEStartPacket::decode(SrsStream* stream)
+{
+	int ret = ERROR_SUCCESS;
+
+	if ((ret = srs_amf0_read_string(stream, command_name)) != ERROR_SUCCESS) {
+		srs_error("amf0 decode FMLE start command_name failed. ret=%d", ret);
+		return ret;
+	}
+	if (command_name.empty() 
+		|| command_name != RTMP_AMF0_COMMAND_RELEASE_STREAM 
+		|| command_name != RTMP_AMF0_COMMAND_FC_PUBLISH
+	) {
+		ret = ERROR_RTMP_AMF0_DECODE;
+		srs_error("amf0 decode FMLE start command_name failed. "
+			"command_name=%s, ret=%d", command_name.c_str(), ret);
+		return ret;
+	}
+	
+	if ((ret = srs_amf0_read_number(stream, transaction_id)) != ERROR_SUCCESS) {
+		srs_error("amf0 decode FMLE start transaction_id failed. ret=%d", ret);
+		return ret;
+	}
+	
+	if ((ret = srs_amf0_read_string(stream, stream_name)) != ERROR_SUCCESS) {
+		srs_error("amf0 decode FMLE start stream_name failed. ret=%d", ret);
+		return ret;
+	}
+	
+	srs_info("amf0 decode FMLE start packet success");
+	
+	return ret;
+}
+
+SrsFMLEStartResPacket::SrsFMLEStartResPacket(double _transaction_id)
+{
+	command_name = RTMP_AMF0_COMMAND_RESULT;
+	transaction_id = _transaction_id;
+	command_object = new SrsAmf0Null();
+	args = new SrsAmf0Undefined();
+}
+
+SrsFMLEStartResPacket::~SrsFMLEStartResPacket()
+{
+	if (command_object) {
+		delete command_object;
+		command_object = NULL;
+	}
+	if (args) {
+		delete args;
+		args = NULL;
+	}
+}
+
+int SrsFMLEStartResPacket::get_perfer_cid()
+{
+	return RTMP_CID_OverConnection;
+}
+
+int SrsFMLEStartResPacket::get_message_type()
+{
+	return RTMP_MSG_AMF0CommandMessage;
+}
+
+int SrsFMLEStartResPacket::get_size()
+{
+	return srs_amf0_get_string_size(command_name) + srs_amf0_get_number_size()
+		+ srs_amf0_get_null_size() + srs_amf0_get_undefined_size();
+}
+
+int SrsFMLEStartResPacket::encode_packet(SrsStream* stream)
+{
+	int ret = ERROR_SUCCESS;
+	
+	if ((ret = srs_amf0_write_string(stream, command_name)) != ERROR_SUCCESS) {
+		srs_error("encode command_name failed. ret=%d", ret);
+		return ret;
+	}
+	srs_verbose("encode command_name success.");
+	
+	if ((ret = srs_amf0_write_number(stream, transaction_id)) != ERROR_SUCCESS) {
+		srs_error("encode transaction_id failed. ret=%d", ret);
+		return ret;
+	}
+	srs_verbose("encode transaction_id success.");
+	
+	if ((ret = srs_amf0_write_null(stream)) != ERROR_SUCCESS) {
+		srs_error("encode command_object failed. ret=%d", ret);
+		return ret;
+	}
+	srs_verbose("encode command_object success.");
+	
+	if ((ret = srs_amf0_write_undefined(stream)) != ERROR_SUCCESS) {
+		srs_error("encode args failed. ret=%d", ret);
+		return ret;
+	}
+	srs_verbose("encode args success.");
+	
+	
+	srs_info("encode FMLE start response packet success.");
+	
+	return ret;
+}
+
 SrsPlayPacket::SrsPlayPacket()
 {
 	command_name = RTMP_AMF0_COMMAND_PLAY;
diff --git a/trunk/src/core/srs_core_protocol.hpp b/trunk/src/core/srs_core_protocol.hpp
index 9b7262204..e76ac20ea 100755
--- a/trunk/src/core/srs_core_protocol.hpp
+++ b/trunk/src/core/srs_core_protocol.hpp
@@ -46,6 +46,7 @@ class SrsMessage;
 class SrsChunkStream;
 class SrsAmf0Object;
 class SrsAmf0Null;
+class SrsAmf0Undefined;
 
 // convert class name to string.
 #define CLASS_NAME_STRING(className) #className
@@ -427,6 +428,57 @@ protected:
 	virtual int encode_packet(SrsStream* stream);
 };
 
+/**
+* FMLE start publish: ReleaseStream/PublishStream
+*/
+class SrsFMLEStartPacket : public SrsPacket
+{
+private:
+	typedef SrsPacket super;
+protected:
+	virtual const char* get_class_name()
+	{
+		return CLASS_NAME_STRING(SrsFMLEStartPacket);
+	}
+public:
+	std::string command_name;
+	double transaction_id;
+	std::string stream_name;
+public:
+	SrsFMLEStartPacket();
+	virtual ~SrsFMLEStartPacket();
+public:
+	virtual int decode(SrsStream* stream);
+};
+/**
+* response for SrsFMLEStartPacket.
+*/
+class SrsFMLEStartResPacket : public SrsPacket
+{
+private:
+	typedef SrsPacket super;
+protected:
+	virtual const char* get_class_name()
+	{
+		return CLASS_NAME_STRING(SrsFMLEStartResPacket);
+	}
+public:
+	std::string command_name;
+	double transaction_id;
+	SrsAmf0Null* command_object;
+	SrsAmf0Undefined* args;
+public:
+	SrsFMLEStartResPacket(double _transaction_id);
+	virtual ~SrsFMLEStartResPacket();
+public:
+	virtual int get_perfer_cid();
+public:
+	virtual int get_message_type();
+protected:
+	virtual int get_size();
+	virtual int encode_packet(SrsStream* stream);
+};
+
 /**
 * 4.2.1. play
 * The client sends this command to the server to play a stream.
diff --git a/trunk/src/core/srs_core_rtmp.cpp b/trunk/src/core/srs_core_rtmp.cpp
index c6ab4b7b9..ab8796378 100755
--- a/trunk/src/core/srs_core_rtmp.cpp
+++ b/trunk/src/core/srs_core_rtmp.cpp
@@ -307,9 +307,15 @@ int SrsRtmp::identify_client(int stream_id, SrsClientType& type, std::string& st
 		
 		SrsPacket* pkt = msg->get_packet();
 		if (dynamic_cast<SrsCreateStreamPacket*>(pkt)) {
+			srs_info("identify client by create stream, play or flash publish.");
 			return identify_create_stream_client(
 				dynamic_cast<SrsCreateStreamPacket*>(pkt), stream_id, type, stream_name);
 		}
+		if (dynamic_cast<SrsFMLEStartPacket*>(pkt)) {
+			srs_info("identify client by releaseStream, fmle publish.");
+			return identify_fmle_publish_client(
+				dynamic_cast<SrsFMLEStartPacket*>(pkt), stream_id, type, stream_name);
+		}
 		
 		srs_trace("ignore AMF0/AMF3 command message.");
 	}
@@ -487,3 +493,83 @@ int SrsRtmp::identify_create_stream_client(SrsCreateStreamPacket* req, int strea
 	return ret;
 }
 
+int SrsRtmp::identify_fmle_publish_client(SrsFMLEStartPacket* req, int stream_id, SrsClientType& type, std::string& stream_name)
+{
+	int ret = ERROR_SUCCESS;
+	
+	type = SrsClientPublish;
+	stream_name = req->stream_name;
+	
+	// createStream response
+	if (true) {
+		SrsMessage* msg = new SrsMessage();
+		SrsFMLEStartResPacket* pkt = new SrsFMLEStartResPacket(req->transaction_id);
+		
+		msg->set_packet(pkt);
+		
+		if ((ret = protocol->send_message(msg)) != ERROR_SUCCESS) {
+			srs_error("send releaseStream response message failed. ret=%d", ret);
+			return ret;
+		}
+		srs_info("send releaseStream response message success.");
+	}
+	
+	// FCPublish
+	double fc_publish_tid = 0;
+	if (true) {
+		SrsMessage* msg = NULL;
+		SrsFMLEStartPacket* pkt = NULL;
+		if ((ret = srs_rtmp_expect_message<SrsFMLEStartPacket>(protocol, &msg, &pkt)) != ERROR_SUCCESS) {
+			srs_error("recv FCPublish message failed. ret=%d", ret);
+			return ret;
+		}
+		srs_info("recv FCPublish request message success.");
+		
+		SrsAutoFree(SrsMessage, msg, false);
+		fc_publish_tid = pkt->transaction_id;
+	}
+	// FCPublish response
+	if (true) {
+		SrsMessage* msg = new SrsMessage();
+		SrsFMLEStartResPacket* pkt = new SrsFMLEStartResPacket(fc_publish_tid);
+		
+		msg->set_packet(pkt);
+		
+		if ((ret = protocol->send_message(msg)) != ERROR_SUCCESS) {
+			srs_error("send FCPublish response message failed. ret=%d", ret);
+			return ret;
+		}
+		srs_info("send FCPublish response message success.");
+	}
+	
+	// createStream
+	double create_stream_tid = 0;
+	if (true) {
+		SrsMessage* msg = NULL;
+		SrsCreateStreamPacket* pkt = NULL;
+		if ((ret = srs_rtmp_expect_message<SrsCreateStreamPacket>(protocol, &msg, &pkt)) != ERROR_SUCCESS) {
+			srs_error("recv createStream message failed. ret=%d", ret);
+			return ret;
+		}
+		srs_info("recv createStream request message success.");
+		
+		SrsAutoFree(SrsMessage, msg, false);
+		create_stream_tid = pkt->transaction_id;
+	}
+	// createStream response
+	if (true) {
+		SrsMessage* msg = new SrsMessage();
+		SrsCreateStreamResPacket* pkt = new SrsCreateStreamResPacket(create_stream_tid, stream_id);
+		
+		msg->set_packet(pkt);
+		
+		if ((ret = protocol->send_message(msg)) != ERROR_SUCCESS) {
+			srs_error("send createStream response message failed. ret=%d", ret);
+			return ret;
+		}
+		srs_info("send createStream response message success.");
+	}
+	
+	return ret;
+}
+
diff --git a/trunk/src/core/srs_core_rtmp.hpp b/trunk/src/core/srs_core_rtmp.hpp
index 9d672b26b..9c51ed5ba 100755
--- a/trunk/src/core/srs_core_rtmp.hpp
+++ b/trunk/src/core/srs_core_rtmp.hpp
@@ -36,6 +36,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 class SrsProtocol;
 class SrsCreateStreamPacket;
+class SrsFMLEStartPacket;
 
 /**
 * the original request from client.
@@ -113,6 +114,7 @@ public:
 	virtual int start_play(int stream_id);
 private:
 	virtual int identify_create_stream_client(SrsCreateStreamPacket* req, int stream_id, SrsClientType& type, std::string& stream_name);
+	virtual int identify_fmle_publish_client(SrsFMLEStartPacket* req, int stream_id, SrsClientType& type, std::string& stream_name);
 };
 
 #endif
\ No newline at end of file