diff --git a/go.mod b/go.mod
index a8a3b648..b68b3013 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d // indirect
-	github.com/aler9/gortsplib v0.0.0-20210508145957-4beda10c06f9
+	github.com/aler9/gortsplib v0.0.0-20210508200522-b98fa90057b4
 	github.com/asticode/go-astits v0.0.0-00010101000000-000000000000
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.4.9
diff --git a/go.sum b/go.sum
index 2d50c2f0..72c8eb53 100644
--- a/go.sum
+++ b/go.sum
@@ -4,8 +4,8 @@ github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d h1:UQZhZ2O0vMHr2c
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
 github.com/aler9/go-astits v0.0.0-20210423195926-582b09ed7c04 h1:CXgQLsU4uxWAmsXNOjGLbj0A+0IlRcpZpMgI13fmVwo=
 github.com/aler9/go-astits v0.0.0-20210423195926-582b09ed7c04/go.mod h1:DkOWmBNQpnr9mv24KfZjq4JawCFX1FCqjLVGvO0DygQ=
-github.com/aler9/gortsplib v0.0.0-20210508145957-4beda10c06f9 h1:v9QqgvTa2mCcsEFvwJigabE/fNIIOXC40fGneIPm89Y=
-github.com/aler9/gortsplib v0.0.0-20210508145957-4beda10c06f9/go.mod h1:zVCg+TQX445hh1pC5QgAuuBvvXZMWLY1XYz626dGFqY=
+github.com/aler9/gortsplib v0.0.0-20210508200522-b98fa90057b4 h1:mL4yLi09Bpph+cLlXdU6CJAsIox9a5grz4ik4M3Q9ik=
+github.com/aler9/gortsplib v0.0.0-20210508200522-b98fa90057b4/go.mod h1:zVCg+TQX445hh1pC5QgAuuBvvXZMWLY1XYz626dGFqY=
 github.com/aler9/rtmp v0.0.0-20210403095203-3be4a5535927 h1:95mXJ5fUCYpBRdSOnLAQAdJHHKxxxJrVCiaqDi965YQ=
 github.com/aler9/rtmp v0.0.0-20210403095203-3be4a5535927/go.mod h1:vzuE21rowz+lT1NGsWbreIvYulgBpCGnQyeTyFblUHc=
 github.com/asticode/go-astikit v0.20.0 h1:+7N+J4E4lWx2QOkRdOf6DafWJMv6O4RRfgClwQokrH8=
diff --git a/internal/clientrtmp/client.go b/internal/clientrtmp/client.go
index ce1aaeda..4c731e04 100644
--- a/internal/clientrtmp/client.go
+++ b/internal/clientrtmp/client.go
@@ -138,7 +138,7 @@ func (c *Client) IsReadPublisher() {}
 func (c *Client) IsSource() {}
 
 func (c *Client) log(level logger.Level, format string, args ...interface{}) {
-	c.parent.Log(level, "[client %s] "+format, append([]interface{}{c.conn.NetConn().RemoteAddr().String()}, args...)...)
+	c.parent.Log(level, "[client %v] "+format, append([]interface{}{c.conn.NetConn().RemoteAddr()}, args...)...)
 }
 
 func (c *Client) ip() net.IP {
diff --git a/internal/clientrtsp/client.go b/internal/clientrtsp/client.go
index 747de8b6..7c79395c 100644
--- a/internal/clientrtsp/client.go
+++ b/internal/clientrtsp/client.go
@@ -110,7 +110,7 @@ func (c *Client) Close(err error) {
 }
 
 func (c *Client) log(level logger.Level, format string, args ...interface{}) {
-	c.parent.Log(level, "[client %s] "+format, append([]interface{}{c.conn.NetConn().RemoteAddr().String()}, args...)...)
+	c.parent.Log(level, "[client %v] "+format, append([]interface{}{c.conn.NetConn().RemoteAddr()}, args...)...)
 }
 
 // Conn returns the RTSP connection.
diff --git a/internal/serverhls/server.go b/internal/serverhls/server.go
index 90853b6e..f87e6997 100644
--- a/internal/serverhls/server.go
+++ b/internal/serverhls/server.go
@@ -156,7 +156,7 @@ outer:
 
 // ServeHTTP implements http.Handler.
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	s.Log(logger.Info, "[client %s] %s %s", r.RemoteAddr, r.Method, r.URL.Path)
+	s.Log(logger.Info, "[client %v] %s %s", r.RemoteAddr, r.Method, r.URL.Path)
 
 	// remove leading prefix
 	path := r.URL.Path[1:]
diff --git a/internal/serverrtsp/server.go b/internal/serverrtsp/server.go
index 73858327..bed21e80 100644
--- a/internal/serverrtsp/server.go
+++ b/internal/serverrtsp/server.go
@@ -1,7 +1,10 @@
 package serverrtsp
 
 import (
+	"crypto/rand"
 	"crypto/tls"
+	"encoding/binary"
+	"strconv"
 	"sync"
 	"time"
 
@@ -15,6 +18,30 @@ import (
 	"github.com/aler9/rtsp-simple-server/internal/stats"
 )
 
+func newSessionVisualID(sessions map[*gortsplib.ServerSession]*sessionrtsp.Session) (string, error) {
+	for {
+		b := make([]byte, 4)
+		_, err := rand.Read(b)
+		if err != nil {
+			return "", err
+		}
+
+		id := strconv.FormatUint(uint64(binary.LittleEndian.Uint32(b)), 10)
+
+		alreadyPresent := func() bool {
+			for _, s := range sessions {
+				if s.VisualID() == id {
+					return true
+				}
+			}
+			return false
+		}()
+		if !alreadyPresent {
+			return id, nil
+		}
+	}
+}
+
 // Parent is implemented by program.
 type Parent interface {
 	Log(logger.Level, string, ...interface{})
@@ -170,8 +197,8 @@ outer:
 	close(serverErr)
 }
 
-// OnConnOpen implements gortsplib.ServerHandlerOnConnOpenCtx.
-func (s *Server) OnConnOpen(sc *gortsplib.ServerConn) {
+// OnConnOpen implements gortsplib.ServerHandlerOnConnOpen.
+func (s *Server) OnConnOpen(ctx *gortsplib.ServerHandlerOnConnOpenCtx) {
 	c := clientrtsp.New(
 		s.rtspAddress,
 		s.readTimeout,
@@ -179,25 +206,25 @@ func (s *Server) OnConnOpen(sc *gortsplib.ServerConn) {
 		s.runOnConnectRestart,
 		s.pathMan,
 		s.stats,
-		sc,
+		ctx.Conn,
 		s)
 
 	s.mutex.Lock()
-	s.clients[sc] = c
+	s.clients[ctx.Conn] = c
 	s.mutex.Unlock()
 }
 
-// OnConnClose implements gortsplib.ServerHandlerOnConnCloseCtx.
-func (s *Server) OnConnClose(sc *gortsplib.ServerConn, err error) {
+// OnConnClose implements gortsplib.ServerHandlerOnConnClose.
+func (s *Server) OnConnClose(ctx *gortsplib.ServerHandlerOnConnCloseCtx) {
 	s.mutex.Lock()
-	c := s.clients[sc]
-	delete(s.clients, sc)
+	c := s.clients[ctx.Conn]
+	delete(s.clients, ctx.Conn)
 	s.mutex.Unlock()
 
-	c.Close(err)
+	c.Close(ctx.Error)
 }
 
-// OnRequest implements gortsplib.ServerHandlerOnRequestCtx.
+// OnRequest implements gortsplib.ServerHandlerOnRequest.
 func (s *Server) OnRequest(sc *gortsplib.ServerConn, req *base.Request) {
 	s.mutex.Lock()
 	c := s.clients[sc]
@@ -206,7 +233,7 @@ func (s *Server) OnRequest(sc *gortsplib.ServerConn, req *base.Request) {
 	c.OnRequest(req)
 }
 
-// OnResponse implements gortsplib.ServerHandlerOnResponseCtx.
+// OnResponse implements gortsplib.ServerHandlerOnResponse.
 func (s *Server) OnResponse(sc *gortsplib.ServerConn, res *base.Response) {
 	s.mutex.Lock()
 	c := s.clients[sc]
@@ -215,31 +242,38 @@ func (s *Server) OnResponse(sc *gortsplib.ServerConn, res *base.Response) {
 	c.OnResponse(res)
 }
 
-// OnSessionOpen implements gortsplib.ServerHandlerOnSessionOpenCtx.
-func (s *Server) OnSessionOpen(ss *gortsplib.ServerSession) {
+// OnSessionOpen implements gortsplib.ServerHandlerOnSessionOpen.
+func (s *Server) OnSessionOpen(ctx *gortsplib.ServerHandlerOnSessionOpenCtx) {
+	s.mutex.Lock()
+
+	// do not use ss.ID() in logs, since it allows to take ownership of a session
+	// use a new random ID
+	visualID, _ := newSessionVisualID(s.sessions)
+
 	se := sessionrtsp.New(
 		s.rtspAddress,
 		s.protocols,
-		ss,
+		visualID,
+		ctx.Session,
+		ctx.Conn,
 		s.pathMan,
 		s)
 
-	s.mutex.Lock()
-	s.sessions[ss] = se
+	s.sessions[ctx.Session] = se
 	s.mutex.Unlock()
 }
 
-// OnSessionClose implements gortsplib.ServerHandlerOnSessionCloseCtx.
-func (s *Server) OnSessionClose(ss *gortsplib.ServerSession, err error) {
+// OnSessionClose implements gortsplib.ServerHandlerOnSessionClose.
+func (s *Server) OnSessionClose(ctx *gortsplib.ServerHandlerOnSessionCloseCtx) {
 	s.mutex.Lock()
-	se := s.sessions[ss]
-	delete(s.sessions, ss)
+	se := s.sessions[ctx.Session]
+	delete(s.sessions, ctx.Session)
 	s.mutex.Unlock()
 
 	se.Close()
 }
 
-// OnDescribe implements gortsplib.ServerHandlerOnDescribeCtx.
+// OnDescribe implements gortsplib.ServerHandlerOnDescribe.
 func (s *Server) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*base.Response, []byte, error) {
 	s.mutex.RLock()
 	c := s.clients[ctx.Conn]
@@ -247,7 +281,7 @@ func (s *Server) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*base.Re
 	return c.OnDescribe(ctx)
 }
 
-// OnAnnounce implements gortsplib.ServerHandlerOnAnnounceCtx.
+// OnAnnounce implements gortsplib.ServerHandlerOnAnnounce.
 func (s *Server) OnAnnounce(ctx *gortsplib.ServerHandlerOnAnnounceCtx) (*base.Response, error) {
 	s.mutex.RLock()
 	c := s.clients[ctx.Conn]
@@ -256,7 +290,7 @@ func (s *Server) OnAnnounce(ctx *gortsplib.ServerHandlerOnAnnounceCtx) (*base.Re
 	return se.OnAnnounce(c, ctx)
 }
 
-// OnSetup implements gortsplib.ServerHandlerOnSetupCtx.
+// OnSetup implements gortsplib.ServerHandlerOnSetup.
 func (s *Server) OnSetup(ctx *gortsplib.ServerHandlerOnSetupCtx) (*base.Response, error) {
 	s.mutex.RLock()
 	c := s.clients[ctx.Conn]
@@ -265,7 +299,7 @@ func (s *Server) OnSetup(ctx *gortsplib.ServerHandlerOnSetupCtx) (*base.Response
 	return se.OnSetup(c, ctx)
 }
 
-// OnPlay implements gortsplib.ServerHandlerOnPlayCtx.
+// OnPlay implements gortsplib.ServerHandlerOnPlay.
 func (s *Server) OnPlay(ctx *gortsplib.ServerHandlerOnPlayCtx) (*base.Response, error) {
 	s.mutex.RLock()
 	se := s.sessions[ctx.Session]
@@ -273,7 +307,7 @@ func (s *Server) OnPlay(ctx *gortsplib.ServerHandlerOnPlayCtx) (*base.Response,
 	return se.OnPlay(ctx)
 }
 
-// OnRecord implements gortsplib.ServerHandlerOnRecordCtx.
+// OnRecord implements gortsplib.ServerHandlerOnRecord.
 func (s *Server) OnRecord(ctx *gortsplib.ServerHandlerOnRecordCtx) (*base.Response, error) {
 	s.mutex.RLock()
 	se := s.sessions[ctx.Session]
@@ -281,7 +315,7 @@ func (s *Server) OnRecord(ctx *gortsplib.ServerHandlerOnRecordCtx) (*base.Respon
 	return se.OnRecord(ctx)
 }
 
-// OnPause implements gortsplib.ServerHandlerOnPauseCtx.
+// OnPause implements gortsplib.ServerHandlerOnPause.
 func (s *Server) OnPause(ctx *gortsplib.ServerHandlerOnPauseCtx) (*base.Response, error) {
 	s.mutex.RLock()
 	se := s.sessions[ctx.Session]
@@ -289,7 +323,7 @@ func (s *Server) OnPause(ctx *gortsplib.ServerHandlerOnPauseCtx) (*base.Response
 	return se.OnPause(ctx)
 }
 
-// OnFrame implements gortsplib.ServerHandlerOnFrameCtx.
+// OnFrame implements gortsplib.ServerHandlerOnFrame.
 func (s *Server) OnFrame(ctx *gortsplib.ServerHandlerOnFrameCtx) {
 	s.mutex.RLock()
 	se := s.sessions[ctx.Session]
diff --git a/internal/sessionrtsp/session.go b/internal/sessionrtsp/session.go
index 28733b98..ea9bbd10 100644
--- a/internal/sessionrtsp/session.go
+++ b/internal/sessionrtsp/session.go
@@ -39,6 +39,7 @@ type Parent interface {
 type Session struct {
 	rtspAddress string
 	protocols   map[gortsplib.StreamProtocol]struct{}
+	visualID    string
 	ss          *gortsplib.ServerSession
 	pathMan     PathMan
 	parent      Parent
@@ -54,19 +55,22 @@ type Session struct {
 func New(
 	rtspAddress string,
 	protocols map[gortsplib.StreamProtocol]struct{},
+	visualID string,
 	ss *gortsplib.ServerSession,
+	sc *gortsplib.ServerConn,
 	pathMan PathMan,
 	parent Parent) *Session {
 
 	s := &Session{
 		rtspAddress: rtspAddress,
 		protocols:   protocols,
+		visualID:    visualID,
 		ss:          ss,
 		pathMan:     pathMan,
 		parent:      parent,
 	}
 
-	s.log(logger.Info, "created")
+	s.log(logger.Info, "created by %v", sc.NetConn().RemoteAddr())
 
 	return s
 }
@@ -106,8 +110,13 @@ func (s *Session) IsReadPublisher() {}
 // IsSource implements source.Source.
 func (s *Session) IsSource() {}
 
+// VisualID returns the visual ID of the session.
+func (s *Session) VisualID() string {
+	return s.visualID
+}
+
 func (s *Session) log(level logger.Level, format string, args ...interface{}) {
-	s.parent.Log(level, "[session %s] "+format, append([]interface{}{"TODO"}, args...)...)
+	s.parent.Log(level, "[session %s] "+format, append([]interface{}{s.visualID}, args...)...)
 }
 
 // OnAnnounce is called by serverrtsp.Server.