diff --git a/rtsp/player.go b/rtsp/player.go
index 0216936b..14ce0f4b 100644
--- a/rtsp/player.go
+++ b/rtsp/player.go
@@ -3,6 +3,7 @@ package rtsp
 import (
 	"sync"
 	"time"
+	"github.com/penggy/EasyGoLib/utils"
 )
 
 type Player struct {
@@ -10,14 +11,22 @@ type Player struct {
 	Pusher *Pusher
 	cond   *sync.Cond
 	queue  []*RTPPack
+	queueLimit int
+	dropPacketWhenPaused bool
+	paused bool
 }
 
 func NewPlayer(session *Session, pusher *Pusher) (player *Player) {
+	queueLimit := utils.Conf().Section("rtsp").Key("player_queue_limit").MustInt(0)
+	dropPacketWhenPaused := utils.Conf().Section("rtsp").Key("drop_packet_when_paused").MustInt(0)
 	player = &Player{
 		Session: session,
 		Pusher:  pusher,
 		cond:    sync.NewCond(&sync.Mutex{}),
 		queue:   make([]*RTPPack, 0),
+		queueLimit: queueLimit,
+		dropPacketWhenPaused: dropPacketWhenPaused != 0,
+		paused:  false,
 	}
 	session.StopHandles = append(session.StopHandles, func() {
 		pusher.RemovePlayer(player)
@@ -32,8 +41,18 @@ func (player *Player) QueueRTP(pack *RTPPack) *Player {
 		logger.Printf("player queue enter nil pack, drop it")
 		return player
 	}
+	if player.paused && player.dropPacketWhenPaused {
+		return player
+	}
 	player.cond.L.Lock()
 	player.queue = append(player.queue, pack)
+	if oldLen := len(player.queue); player.queueLimit > 0 && oldLen > player.queueLimit {
+		player.queue = player.queue[1:]
+		if player.debugLogEnable {
+			len := len(player.queue)
+			logger.Printf("Player %s, QueueRTP, exceeds limit(%d), drop %d old packets, current queue.len=%d\n", player.String(), player.queueLimit, oldLen - len, len)
+		}
+	}
 	player.cond.Signal()
 	player.cond.L.Unlock()
 	return player
@@ -52,7 +71,11 @@ func (player *Player) Start() {
 			pack = player.queue[0]
 			player.queue = player.queue[1:]
 		}
+		queueLen := len(player.queue)
 		player.cond.L.Unlock()
+		if player.paused {
+			continue
+		}
 		if pack == nil {
 			if !player.Stoped {
 				logger.Printf("player not stoped, but queue take out nil pack")
@@ -63,9 +86,23 @@ func (player *Player) Start() {
 			logger.Println(err)
 		}
 		elapsed := time.Now().Sub(timer)
-		if elapsed >= 30*time.Second {
-			logger.Printf("Send a package.type:%d\n", pack.Type)
+		if player.debugLogEnable && elapsed >= 30*time.Second {
+			logger.Printf("Player %s, Send a package.type:%d, queue.len=%d\n", player.String(), pack.Type, queueLen)
 			timer = time.Now()
 		}
 	}
 }
+
+func (player *Player) Pause(paused bool) {
+	if paused {
+		player.logger.Printf("Player %s, Pause\n", player.String())
+	} else {
+		player.logger.Printf("Player %s, Play\n", player.String())
+	}
+	player.cond.L.Lock()
+	if paused && player.dropPacketWhenPaused && len(player.queue) > 0 {
+		player.queue = make([]*RTPPack, 0)
+	}
+	player.paused = paused
+	player.cond.L.Unlock()
+}
\ No newline at end of file
diff --git a/rtsp/pusher.go b/rtsp/pusher.go
index 2aa98e90..962e8512 100644
--- a/rtsp/pusher.go
+++ b/rtsp/pusher.go
@@ -311,6 +311,13 @@ func (pusher *Pusher) GetPlayers() (players map[string]*Player) {
 	return
 }
 
+func (pusher *Pusher) HasPlayer(player *Player) bool {
+	pusher.playersLock.Lock()
+	_, ok := pusher.players[player.ID]
+	pusher.playersLock.Unlock()
+	return ok
+}
+
 func (pusher *Pusher) AddPlayer(player *Player) *Pusher {
 	logger := pusher.Logger()
 	if pusher.gopCacheEnable {
diff --git a/rtsp/rtsp-client.go b/rtsp/rtsp-client.go
index ab080101..37b22182 100644
--- a/rtsp/rtsp-client.go
+++ b/rtsp/rtsp-client.go
@@ -48,6 +48,9 @@ type RTSPClient struct {
 	OptionIntervalMillis int64
 	SDPRaw               string
 
+	debugLogEnable       bool
+	lastRtpSN            uint16
+
 	Agent    string
 	authLine string
 
@@ -71,6 +74,7 @@ func NewRTSPClient(server *Server, rawUrl string, sendOptionMillis int64, agent
 	if err != nil {
 		return
 	}
+	debugLogEnable := utils.Conf().Section("rtsp").Key("debug_log_enable").MustInt(0)
 	client = &RTSPClient{
 		Server:               server,
 		Stoped:               false,
@@ -85,6 +89,7 @@ func NewRTSPClient(server *Server, rawUrl string, sendOptionMillis int64, agent
 		OptionIntervalMillis: sendOptionMillis,
 		StartAt:              time.Now(),
 		Agent:                agent,
+		debugLogEnable:       debugLogEnable != 0,
 	}
 	client.logger = log.New(os.Stdout, fmt.Sprintf("[%s]", client.ID), log.LstdFlags|log.Lshortfile)
 	if !utils.Debug {
@@ -417,11 +422,24 @@ func (client *RTSPClient) startStream() {
 				client.logger.Printf("session tcp got nil rtp pack")
 				continue
 			}
-			elapsed := time.Now().Sub(loggerTime)
-			if elapsed >= 10*time.Second {
-				client.logger.Printf("%v read rtp frame.", client)
-				loggerTime = time.Now()
+
+			if client.debugLogEnable {
+				rtp := ParseRTP(pack.Buffer.Bytes())
+				if rtp != nil {
+					rtpSN := uint16(rtp.SequenceNumber)
+					if client.lastRtpSN != 0 && client.lastRtpSN + 1 != rtpSN {
+						client.logger.Printf("%s, %d packets lost, current SN=%d, last SN=%d\n", client.String(), rtpSN - client.lastRtpSN, rtpSN, client.lastRtpSN)
+					}
+					client.lastRtpSN = rtpSN
+				}
+
+				elapsed := time.Now().Sub(loggerTime)
+				if elapsed >= 30*time.Second {
+					client.logger.Printf("%v read rtp frame.", client)
+					loggerTime = time.Now()
+				}
 			}
+
 			client.InBytes += int(length + 4)
 			for _, h := range client.RTPHandles {
 				h(pack)
diff --git a/rtsp/rtsp-session.go b/rtsp/rtsp-session.go
index 5183c0e8..ed9b077c 100644
--- a/rtsp/rtsp-session.go
+++ b/rtsp/rtsp-session.go
@@ -105,6 +105,7 @@ type Session struct {
 	authorizationEnable bool
 	nonce               string
 	closeOld            bool
+	debugLogEnable      bool
 
 	AControl string
 	VControl string
@@ -133,7 +134,7 @@ type Session struct {
 }
 
 func (session *Session) String() string {
-	return fmt.Sprintf("session[%v][%v][%s][%s]", session.Type, session.TransType, session.Path, session.ID)
+	return fmt.Sprintf("session[%v][%v][%s][%s][%s]", session.Type, session.TransType, session.Path, session.ID, session.Conn.RemoteAddr().String())
 }
 
 func NewSession(server *Server, conn net.Conn) *Session {
@@ -142,6 +143,7 @@ func NewSession(server *Server, conn net.Conn) *Session {
 	timeoutTCPConn := &RichConn{conn, time.Duration(timeoutMillis) * time.Millisecond}
 	authorizationEnable := utils.Conf().Section("rtsp").Key("authorization_enable").MustInt(0)
 	close_old := utils.Conf().Section("rtsp").Key("close_old").MustInt(0)
+	debugLogEnable := utils.Conf().Section("rtsp").Key("debug_log_enable").MustInt(0)
 	session := &Session{
 		ID:                  shortid.MustGenerate(),
 		Server:              server,
@@ -150,6 +152,7 @@ func NewSession(server *Server, conn net.Conn) *Session {
 		StartAt:             time.Now(),
 		Timeout:             utils.Conf().Section("rtsp").Key("timeout").MustInt(0),
 		authorizationEnable: authorizationEnable != 0,
+		debugLogEnable:      debugLogEnable != 0,
 		RTPHandles:          make([]func(*RTPPack), 0),
 		StopHandles:         make([]func(), 0),
 		vRTPChannel:         -1,
@@ -383,7 +386,11 @@ func (session *Session) handleRequest(req *Request) {
 		case "PLAY", "RECORD":
 			switch session.Type {
 			case SESSEION_TYPE_PLAYER:
-				session.Pusher.AddPlayer(session.Player)
+				if session.Pusher.HasPlayer(session.Player) {
+					session.Player.Pause(false)
+				} else {
+					session.Pusher.AddPlayer(session.Player)
+				}
 				// case SESSION_TYPE_PUSHER:
 				// 	session.Server.AddPusher(session.Pusher)
 			}
@@ -683,6 +690,13 @@ func (session *Session) handleRequest(req *Request) {
 			res.Status = "Error Status"
 			return
 		}
+	case "PAUSE":
+		if session.Player == nil {
+			res.StatusCode = 500
+			res.Status = "Error Status"
+			return
+		}
+		session.Player.Pause(true)
 	}
 }