diff --git a/av/avconv/avconv.go b/av/avconv/avconv.go
index 6c954a1..a9b67ba 100644
--- a/av/avconv/avconv.go
+++ b/av/avconv/avconv.go
@@ -11,22 +11,6 @@ import (
 
 var Debug bool
 
-func Open(filename string) (demuxer av.DemuxCloser, err error) {
-	if demuxer, err = avutil.Open(filename); err != nil {
-		err = fmt.Errorf("avconv: open input `%s` failed: %s", filename, err)
-		return
-	}
-	return
-}
-
-func Create(filename string) (muxer av.MuxCloser, err error) {
-	if muxer, err = avutil.Create(filename); err != nil {
-		err = fmt.Errorf("avconv: create output `%s` failed: %s", filename, err)
-		return
-	}
-	return
-}
-
 type Option struct {
 	Transcode bool
 	Args []string
@@ -178,12 +162,12 @@ func ConvertCmdline(args []string) (err error) {
 	var demuxer av.DemuxCloser
 	var muxer av.MuxCloser
 
-	if demuxer, err = Open(input); err != nil {
+	if demuxer, err = avutil.Open(input); err != nil {
 		return
 	}
 	defer demuxer.Close()
 
-	if muxer, err = Create(output); err != nil {
+	if muxer, err = avutil.Create(output); err != nil {
 		return
 	}
 	defer muxer.Close()
diff --git a/av/avutil/avutil.go b/av/avutil/avutil.go
index 5087c27..48659ba 100644
--- a/av/avutil/avutil.go
+++ b/av/avutil/avutil.go
@@ -2,6 +2,7 @@ package avutil
 
 import (
 	"io"
+	"strings"
 	"fmt"
 	"bytes"
 	"github.com/nareix/joy4/av"
@@ -52,6 +53,8 @@ type RegisterHandler struct {
 	Probe func([]byte)bool
 	AudioEncoder func(av.CodecType)(av.AudioEncoder,error)
 	AudioDecoder func(av.AudioCodecData)(av.AudioDecoder,error)
+	ServerDemuxer func(string)(bool,av.DemuxCloser,error)
+	ServerMuxer func(string)(bool,av.MuxCloser,error)
 }
 
 type Handlers struct {
@@ -111,11 +114,26 @@ func (self *Handlers) NewAudioDecoder(codec av.AudioCodecData) (dec av.AudioDeco
 }
 
 func (self *Handlers) Open(uri string) (demuxer av.DemuxCloser, err error) {
+	listen := false
+	if strings.HasPrefix(uri, "listen:") {
+		uri = uri[len("listen:"):]
+		listen = true
+	}
+
 	for _, handler := range self.handlers {
-		if handler.UrlDemuxer != nil {
-			var ok bool
-			if ok, demuxer, err = handler.UrlDemuxer(uri); ok {
-				return
+		if listen {
+			if handler.ServerDemuxer != nil {
+				var ok bool
+				if ok, demuxer, err = handler.ServerDemuxer(uri); ok {
+					return
+				}
+			}
+		} else {
+			if handler.UrlDemuxer != nil {
+				var ok bool
+				if ok, demuxer, err = handler.UrlDemuxer(uri); ok {
+					return
+				}
 			}
 		}
 	}
@@ -170,6 +188,23 @@ func (self *Handlers) Open(uri string) (demuxer av.DemuxCloser, err error) {
 }
 
 func (self *Handlers) Create(uri string) (muxer av.MuxCloser, err error) {
+	listen := false
+	if strings.HasPrefix(uri, "listen:") {
+		uri = uri[len("listen:"):]
+		listen = true
+	}
+
+	for _, handler := range self.handlers {
+		if listen {
+			if handler.ServerMuxer != nil {
+				var ok bool
+				if ok, muxer, err = handler.ServerMuxer(uri); ok {
+					return
+				}
+			}
+		}
+	}
+
 	var ext string
 	var u *url.URL
 	if u, _ = url.Parse(uri); u != nil && u.Scheme != "" {
diff --git a/format/rtmp/rtmp.go b/format/rtmp/rtmp.go
index b4928a0..3f66662 100644
--- a/format/rtmp/rtmp.go
+++ b/format/rtmp/rtmp.go
@@ -25,7 +25,13 @@ import (
 
 var MaxProbePacketCount = 6
 
-func ParseURL(uri string) (u *url.URL) {
+func ParseURL(uri string) (u *url.URL, err error) {
+	if u, err = url.Parse(uri); err != nil {
+		return
+	}
+	if _, _, serr := net.SplitHostPort(u.Host); serr != nil {
+		u.Host += ":1935"
+	}
 	return
 }
 
@@ -35,13 +41,9 @@ func Dial(uri string) (conn *Conn, err error) {
 
 func DialTimeout(uri string, timeout time.Duration) (conn *Conn, err error) {
 	var u *url.URL
-
-	if u, err = url.Parse(uri); err != nil {
+	if u, err = ParseURL(uri); err != nil {
 		return
 	}
-	if _, _, serr := net.SplitHostPort(u.Host); serr != nil {
-		u.Host += ":1935"
-	}
 
 	dailer := net.Dialer{Timeout: timeout}
 	var netconn net.Conn
@@ -301,7 +303,7 @@ func createURL(tcurl, app, play string) (u *url.URL) {
 			out = append(out, s)
 		}
 	}
-	path := strings.Join(out, "/")
+	path := "/"+strings.Join(out, "/")
 	u, _ = url.ParseRequestURI(path)
 
 	if tcurl != "" {
@@ -1740,6 +1742,16 @@ func (self *Conn) handshakeServer() (err error) {
 	return
 }
 
+type closeConn struct {
+	*Conn
+	waitclose chan bool
+}
+
+func (self closeConn) Close() error {
+	self.waitclose <- true
+	return nil
+}
+
 func Handler(h *avutil.RegisterHandler) {
 	h.UrlDemuxer = func(uri string) (ok bool, demuxer av.DemuxCloser, err error) {
 		if !strings.HasPrefix(uri, "rtmp://") {
@@ -1749,5 +1761,87 @@ func Handler(h *avutil.RegisterHandler) {
 		demuxer, err = Dial(uri)
 		return
 	}
+
+	h.ServerMuxer = func(uri string) (ok bool, muxer av.MuxCloser, err error) {
+		if !strings.HasPrefix(uri, "rtmp://") {
+			return
+		}
+		ok = true
+
+		var u *url.URL
+		if u, err = ParseURL(uri); err != nil {
+			return
+		}
+		server := &Server{
+			Addr: u.Host,
+		}
+
+		waitstart := make(chan error)
+		waitconn := make(chan *Conn)
+		waitclose := make(chan bool)
+
+		server.HandlePlay = func(conn *Conn) {
+			waitconn <- conn
+			<-waitclose
+		}
+
+		go func() {
+			waitstart <- server.ListenAndServe()
+		}()
+
+		select {
+		case err = <-waitstart:
+			if err != nil {
+				return
+			}
+
+		case conn := <-waitconn:
+			muxer = closeConn{Conn: conn, waitclose: waitclose}
+			return
+		}
+
+		return
+	}
+
+	h.ServerDemuxer = func(uri string) (ok bool, demuxer av.DemuxCloser, err error) {
+		if !strings.HasPrefix(uri, "rtmp://") {
+			return
+		}
+		ok = true
+
+		var u *url.URL
+		if u, err = ParseURL(uri); err != nil {
+			return
+		}
+		server := &Server{
+			Addr: u.Host,
+		}
+
+		waitstart := make(chan error)
+		waitconn := make(chan *Conn)
+		waitclose := make(chan bool)
+
+		server.HandlePublish = func(conn *Conn) {
+			waitconn <- conn
+			<-waitclose
+		}
+
+		go func() {
+			waitstart <- server.ListenAndServe()
+		}()
+
+		select {
+		case err = <-waitstart:
+			if err != nil {
+				return
+			}
+
+		case conn := <-waitconn:
+			demuxer = closeConn{Conn: conn, waitclose: waitclose}
+			return
+		}
+
+		return
+	}
 }