diff --git a/rtsp/udp-client.go b/rtsp/udp-client.go
index b8196dfa..d0c150ca 100644
--- a/rtsp/udp-client.go
+++ b/rtsp/udp-client.go
@@ -92,7 +92,10 @@ func (c *UDPClient) SetupAudio() (err error) {
 }
 
 func (c *UDPClient) SetupVideo() (err error) {
-	logger := c.logger
+	var (
+		logger = c.logger
+		addr   *net.UDPAddr
+	)
 	defer func() {
 		if err != nil {
 			logger.Println(err)
@@ -101,19 +104,17 @@ func (c *UDPClient) SetupVideo() (err error) {
 	}()
 	host := c.Conn.RemoteAddr().String()
 	host = host[:strings.LastIndex(host, ":")]
-	addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", host, c.VPort))
-	if err != nil {
+	if addr, err = net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", host, c.VPort)); err != nil {
 		return
 	}
-	c.VConn, err = net.DialUDP("udp", nil, addr)
-	if err != nil {
+	if c.VConn, err = net.DialUDP("udp", nil, addr); err != nil {
 		return
 	}
 	networkBuffer := utils.Conf().Section("rtsp").Key("network_buffer").MustInt(1048576)
-	if err := c.VConn.SetReadBuffer(networkBuffer); err != nil {
+	if err = c.VConn.SetReadBuffer(networkBuffer); err != nil {
 		logger.Printf("udp client video conn set read buffer error, %v", err)
 	}
-	if err := c.VConn.SetWriteBuffer(networkBuffer); err != nil {
+	if err = c.VConn.SetWriteBuffer(networkBuffer); err != nil {
 		logger.Printf("udp client video conn set write buffer error, %v", err)
 	}
 
@@ -125,10 +126,10 @@ func (c *UDPClient) SetupVideo() (err error) {
 	if err != nil {
 		return
 	}
-	if err := c.VControlConn.SetReadBuffer(networkBuffer); err != nil {
+	if err = c.VControlConn.SetReadBuffer(networkBuffer); err != nil {
 		logger.Printf("udp client video control conn set read buffer error, %v", err)
 	}
-	if err := c.VControlConn.SetWriteBuffer(networkBuffer); err != nil {
+	if err = c.VControlConn.SetWriteBuffer(networkBuffer); err != nil {
 		logger.Printf("udp client video control conn set write buffer error, %v", err)
 	}
 	return
@@ -157,8 +158,8 @@ func (c *UDPClient) SendRTP(pack *RTPPack) (err error) {
 		err = fmt.Errorf("udp client send rtp pack type[%v] failed, conn not found", pack.Type)
 		return
 	}
-	n, err := conn.Write(pack.Buffer.Bytes())
-	if err != nil {
+	var n int
+	if n, err = conn.Write(pack.Buffer.Bytes()); err != nil {
 		err = fmt.Errorf("udp client write bytes error, %v", err)
 		return
 	}