diff --git a/internal/xiaomi/xiaomi.go b/internal/xiaomi/xiaomi.go
index d8611981..1801fa86 100644
--- a/internal/xiaomi/xiaomi.go
+++ b/internal/xiaomi/xiaomi.go
@@ -99,12 +99,12 @@ func getCameraURL(url *url.URL) (string, error) {
 	// The getMissURL request has a fallback to getP2PURL.
 	// But for known models we can save one request to the cloud.
 	if xiaomi.IsLegacy(model) {
-		return getP2PURL(url)
+		return getLegacyURL(url)
 	}
 	return getMissURL(url)
 }
 
-func getP2PURL(url *url.URL) (string, error) {
+func getLegacyURL(url *url.URL) (string, error) {
 	query := url.Query()
 
 	clientPublic, clientPrivate, err := crypto.GenerateKey()
@@ -161,7 +161,7 @@ func getMissURL(url *url.URL) (string, error) {
 	res, err := cloudUserRequest(url.User, "/v2/device/miss_get_vendor", params)
 	if err != nil {
 		if strings.Contains(err.Error(), "no available vendor support") {
-			return getP2PURL(url)
+			return getLegacyURL(url)
 		}
 		return "", err
 	}
diff --git a/pkg/tutk/session25.go b/pkg/tutk/session25.go
index a12f52f3..fd1f16b4 100644
--- a/pkg/tutk/session25.go
+++ b/pkg/tutk/session25.go
@@ -231,10 +231,6 @@ func (s *Session25) msgAckCounters() []byte {
 }
 
 func (s *Session25) handleCh1(cmd []byte) int {
-	// Channel 1 used for two-way audio. It's important:
-	// - answer on 0000 command with exact config response (can't set simple proto)
-	// - send 0012 command at start
-	// - respond on every 0008 command for smooth playback
 	switch cid := string(cmd[:2]); cid {
 	case "\x00\x00": // client start
 		return msgClientStart
diff --git a/pkg/xiaomi/legacy/client.go b/pkg/xiaomi/legacy/client.go
index cf84b6fe..a35592d4 100644
--- a/pkg/xiaomi/legacy/client.go
+++ b/pkg/xiaomi/legacy/client.go
@@ -85,10 +85,7 @@ func xiaofangLogin(conn *tutk.Conn, password string) error {
 	}
 
 	_, data, err = conn.ReadCommand()
-	if err != nil {
-		return err
-	}
-	return nil
+	return err
 }
 
 type Client struct {
@@ -110,14 +107,8 @@ func (c *Client) ReadPacket() (hdr, payload []byte, err error) {
 		switch hdr[0] {
 		case tutk.CodecH264, tutk.CodecH265:
 			payload, err = DecodeVideo(payload, c.key)
-			if err != nil {
-				return
-			}
 		case tutk.CodecAAC:
 			payload, err = crypto.Decode(payload, c.key)
-			if err != nil {
-				return
-			}
 		}
 	}
 	return
diff --git a/pkg/xiaomi/legacy/producer.go b/pkg/xiaomi/legacy/producer.go
index 6669d837..5c1f795d 100644
--- a/pkg/xiaomi/legacy/producer.go
+++ b/pkg/xiaomi/legacy/producer.go
@@ -62,7 +62,7 @@ func probe(client *Client) ([]*core.Media, error) {
 	var vcodec, acodec *core.Codec
 
 	for {
-		// 0   5000
+		// 0   5000      codec
 		// 2   0000      codec params
 		// 4   01        active clients
 		// 5   34        unknown const
@@ -83,7 +83,6 @@ func probe(client *Client) ([]*core.Media, error) {
 				if codec == tutk.CodecH264 {
 					if h264.NALUType(avcc) == h264.NALUTypeSPS {
 						vcodec = h264.AVCCToCodec(avcc)
-						vcodec.FmtpLine = ""
 					}
 				} else {
 					if h265.NALUType(avcc) == h265.NALUTypeVPS {
diff --git a/pkg/xiaomi/miss/cs2/conn.go b/pkg/xiaomi/miss/cs2/conn.go
index 52a70fa1..1bea07c6 100644
--- a/pkg/xiaomi/miss/cs2/conn.go
+++ b/pkg/xiaomi/miss/cs2/conn.go
@@ -21,7 +21,7 @@ func Dial(host, transport string) (*Conn, error) {
 	_, isTCP := conn.(*tcpConn)
 
 	c := &Conn{
-		conn:  conn,
+		Conn:  conn,
 		isTCP: isTCP,
 		channels: [4]*dataChannel{
 			newDataChannel(0, 10), nil, newDataChannel(250, 100), nil,
@@ -32,7 +32,7 @@ func Dial(host, transport string) (*Conn, error) {
 }
 
 type Conn struct {
-	conn  net.Conn
+	net.Conn
 	isTCP bool
 
 	err    error
@@ -116,7 +116,7 @@ func (c *Conn) worker() {
 	buf := make([]byte, 1200)
 
 	for {
-		n, err := c.conn.Read(buf)
+		n, err := c.Conn.Read(buf)
 		if err != nil {
 			c.err = fmt.Errorf("%s: %w", "cs2", err)
 			return
@@ -136,7 +136,7 @@ func (c *Conn) worker() {
 				// For TCP we should send ping every second to keep connection alive.
 				// Based on PCAP analysis: official Mi Home app sends PING every ~1s.
 				if now := time.Now(); now.After(keepaliveTS) {
-					_, _ = c.conn.Write([]byte{magic, msgPing, 0, 0})
+					_, _ = c.Conn.Write([]byte{magic, msgPing, 0, 0})
 					keepaliveTS = now.Add(time.Second)
 				}
 
@@ -151,7 +151,7 @@ func (c *Conn) worker() {
 				if pushed >= 0 {
 					// For UDP we should send ACK.
 					ack := []byte{magic, msgDrwAck, 0, 6, magicDrw, ch, 0, 1, seqHI, seqLO}
-					_, _ = c.conn.Write(ack)
+					_, _ = c.Conn.Write(ack)
 				}
 			}
 
@@ -161,7 +161,7 @@ func (c *Conn) worker() {
 			}
 
 		case msgPing:
-			_, _ = c.conn.Write([]byte{magic, msgPong, 0, 0})
+			_, _ = c.Conn.Write([]byte{magic, msgPong, 0, 0})
 		case msgPong, msgP2PRdyUDP, msgP2PRdyTCP, msgClose: // skip it
 		case msgDrwAck: // only for UDP
 			if c.cmdAck != nil {
@@ -184,18 +184,6 @@ func (c *Conn) Version() string {
 	return "CS2"
 }
 
-func (c *Conn) RemoteAddr() net.Addr {
-	return c.conn.RemoteAddr()
-}
-
-func (c *Conn) SetDeadline(t time.Time) error {
-	return c.conn.SetDeadline(t)
-}
-
-func (c *Conn) Close() error {
-	return c.conn.Close()
-}
-
 func (c *Conn) Error() error {
 	if c.err != nil {
 		return c.err
@@ -221,7 +209,7 @@ func (c *Conn) WriteCommand(cmd uint32, data []byte) error {
 	c.seqCh0++
 
 	if c.isTCP {
-		_, err := c.conn.Write(req)
+		_, err := c.Conn.Write(req)
 		return err
 	}
 
@@ -237,7 +225,7 @@ func (c *Conn) WriteCommand(cmd uint32, data []byte) error {
 	}
 
 	for {
-		if _, err := c.conn.Write(req); err != nil {
+		if _, err := c.Conn.Write(req); err != nil {
 			return err
 		}
 		<-timeout.C
@@ -278,7 +266,7 @@ func (c *Conn) WritePacket(hdr, payload []byte) error {
 	copy(req[offset:], hdr)
 	copy(req[offset+hdrSize:], hdr)
 
-	_, err := c.conn.Write(req)
+	_, err := c.Conn.Write(req)
 	return err
 }