diff --git a/client.go b/client.go
index 15378853..b71fe76c 100644
--- a/client.go
+++ b/client.go
@@ -207,11 +207,6 @@ type OnPacketRTCPFunc func(rtcp.Packet)
 // OnPacketRTCPAnyFunc is the prototype of the callback passed to OnPacketRTCPAny().
 type OnPacketRTCPAnyFunc func(*media.Media, rtcp.Packet)
 
-// ClientLogFunc is the prototype of the log function.
-//
-// Deprecated: Log() is deprecated.
-type ClientLogFunc func(level LogLevel, format string, args ...interface{})
-
 // Client is a RTSP client.
 type Client struct {
 	//
@@ -257,8 +252,6 @@ type Client struct {
 	BytesReceived *uint64
 	// pointer to a variable that stores sent bytes.
 	BytesSent *uint64
-	// Deprecated: disabling redirects doesn't improve security.
-	RedirectDisable bool
 
 	//
 	// system functions (all optional)
@@ -283,8 +276,6 @@ type Client struct {
 	OnPacketLost ClientOnPacketLostFunc
 	// called when a non-fatal decode error occurs.
 	OnDecodeError ClientOnDecodeErrorFunc
-	// Deprecated: replaced by OnTransportSwitch, OnPacketLost, OnDecodeError
-	Log ClientLogFunc
 
 	//
 	// private
@@ -383,29 +374,14 @@ func (c *Client) Start(scheme string, host string) error {
 		c.OnResponse = func(*base.Response) {
 		}
 	}
-	if c.Log != nil && c.OnTransportSwitch == nil {
-		c.OnTransportSwitch = func(err error) {
-			c.Log(LogLevelWarn, "%v", err)
-		}
-	}
 	if c.OnTransportSwitch == nil {
 		c.OnTransportSwitch = func(err error) {
 		}
 	}
-	if c.Log != nil && c.OnPacketLost == nil {
-		c.OnPacketLost = func(err error) {
-			c.Log(LogLevelWarn, "%v", err)
-		}
-	}
 	if c.OnPacketLost == nil {
 		c.OnPacketLost = func(err error) {
 		}
 	}
-	if c.Log != nil && c.OnDecodeError == nil {
-		c.OnDecodeError = func(err error) {
-			c.Log(LogLevelWarn, "%v", err)
-		}
-	}
 	if c.OnDecodeError == nil {
 		c.OnDecodeError = func(err error) {
 		}
@@ -1016,8 +992,7 @@ func (c *Client) doDescribe(u *url.URL) (media.Medias, *url.URL, *base.Response,
 
 	if res.StatusCode != base.StatusOK {
 		// redirect
-		if !c.RedirectDisable &&
-			res.StatusCode >= base.StatusMovedPermanently &&
+		if res.StatusCode >= base.StatusMovedPermanently &&
 			res.StatusCode <= base.StatusUseProxy &&
 			len(res.Header["Location"]) == 1 {
 			c.reset()
diff --git a/loglevel.go b/loglevel.go
deleted file mode 100644
index 04ac5cef..00000000
--- a/loglevel.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package gortsplib
-
-// LogLevel is a log level.
-//
-// Deprecated: Log() is deprecated.
-type LogLevel int
-
-// Log levels.
-//
-// Deprecated: Log() is deprecated.
-const (
-	LogLevelDebug LogLevel = iota + 1
-	LogLevelInfo
-	LogLevelWarn
-	LogLevelError
-)
diff --git a/pkg/auth/validate.go b/pkg/auth/validate.go
index e76aa314..614a0004 100644
--- a/pkg/auth/validate.go
+++ b/pkg/auth/validate.go
@@ -1,6 +1,7 @@
 package auth
 
 import (
+	"crypto/md5"
 	"crypto/rand"
 	"encoding/hex"
 	"fmt"
@@ -10,6 +11,12 @@ import (
 	"github.com/bluenviron/gortsplib/v4/pkg/url"
 )
 
+func md5Hex(in string) string {
+	h := md5.New()
+	h.Write([]byte(in))
+	return hex.EncodeToString(h.Sum(nil))
+}
+
 // GenerateNonce2 generates a nonce that can be used in Validate().
 func GenerateNonce2() (string, error) {
 	byts := make([]byte, 16)
@@ -21,17 +28,6 @@ func GenerateNonce2() (string, error) {
 	return hex.EncodeToString(byts), nil
 }
 
-// GenerateNonce generates a nonce that can be used in Validate().
-//
-// Deprecated: use GenerateNonce2.
-func GenerateNonce() string {
-	v, err := GenerateNonce2()
-	if err != nil {
-		panic(err)
-	}
-	return v
-}
-
 // GenerateWWWAuthenticate generates a WWW-Authenticate header.
 func GenerateWWWAuthenticate(methods []headers.AuthMethod, realm string, nonce string) base.HeaderValue {
 	if methods == nil {
diff --git a/pkg/auth/validator.go b/pkg/auth/validator.go
deleted file mode 100644
index a1ea7846..00000000
--- a/pkg/auth/validator.go
+++ /dev/null
@@ -1,194 +0,0 @@
-package auth
-
-import (
-	"crypto/md5"
-	"crypto/sha256"
-	"encoding/base64"
-	"encoding/hex"
-	"fmt"
-	"strings"
-
-	"github.com/bluenviron/gortsplib/v4/pkg/base"
-	"github.com/bluenviron/gortsplib/v4/pkg/headers"
-	"github.com/bluenviron/gortsplib/v4/pkg/url"
-)
-
-func md5Hex(in string) string {
-	h := md5.New()
-	h.Write([]byte(in))
-	return hex.EncodeToString(h.Sum(nil))
-}
-
-func sha256Base64(in string) string {
-	h := sha256.New()
-	h.Write([]byte(in))
-	return base64.StdEncoding.EncodeToString(h.Sum(nil))
-}
-
-// Validator allows to validate credentials generated by a Sender.
-//
-// Deprecated: Validator{} has been replaced by Validate()
-type Validator struct {
-	user       string
-	userHashed bool
-	pass       string
-	passHashed bool
-	methods    []headers.AuthMethod
-	realm      string
-	nonce      string
-}
-
-// NewValidator allocates a Validator.
-// If methods is nil, the Basic and Digest methods are used.
-//
-// Deprecated: Validator{} has been replaced by Validate()
-func NewValidator(user string, pass string, methods []headers.AuthMethod) *Validator {
-	if methods == nil {
-		methods = []headers.AuthMethod{headers.AuthBasic, headers.AuthDigest}
-	}
-
-	userHashed := false
-	if strings.HasPrefix(user, "sha256:") {
-		user = strings.TrimPrefix(user, "sha256:")
-		userHashed = true
-	}
-
-	passHashed := false
-	if strings.HasPrefix(pass, "sha256:") {
-		pass = strings.TrimPrefix(pass, "sha256:")
-		passHashed = true
-	}
-
-	// if credentials are hashed, only basic auth is supported
-	if userHashed || passHashed {
-		methods = []headers.AuthMethod{headers.AuthBasic}
-	}
-
-	nonce := GenerateNonce()
-
-	return &Validator{
-		user:       user,
-		userHashed: userHashed,
-		pass:       pass,
-		passHashed: passHashed,
-		methods:    methods,
-		realm:      "IPCAM",
-		nonce:      nonce,
-	}
-}
-
-// Header generates the WWW-Authenticate header needed by a client to
-// authenticate.
-//
-// Deprecated: Validator{} has been replaced by Validate()
-func (va *Validator) Header() base.HeaderValue {
-	var ret base.HeaderValue
-	for _, m := range va.methods {
-		switch m {
-		case headers.AuthBasic:
-			ret = append(ret, (&headers.Authenticate{
-				Method: headers.AuthBasic,
-				Realm:  &va.realm,
-			}).Marshal()...)
-
-		case headers.AuthDigest:
-			ret = append(ret, headers.Authenticate{
-				Method: headers.AuthDigest,
-				Realm:  &va.realm,
-				Nonce:  &va.nonce,
-			}.Marshal()...)
-		}
-	}
-	return ret
-}
-
-// ValidateRequest validates a request sent by a client.
-//
-// Deprecated: Validator{} has been replaced by Validate()
-func (va *Validator) ValidateRequest(req *base.Request, baseURL *url.URL) error {
-	var auth headers.Authorization
-	err := auth.Unmarshal(req.Header["Authorization"])
-	if err != nil {
-		return err
-	}
-
-	switch auth.Method {
-	case headers.AuthBasic:
-		if !va.userHashed {
-			if auth.BasicUser != va.user {
-				return fmt.Errorf("wrong response")
-			}
-		} else {
-			if sha256Base64(auth.BasicUser) != va.user {
-				return fmt.Errorf("wrong response")
-			}
-		}
-
-		if !va.passHashed {
-			if auth.BasicPass != va.pass {
-				return fmt.Errorf("wrong response")
-			}
-		} else {
-			if sha256Base64(auth.BasicPass) != va.pass {
-				return fmt.Errorf("wrong response")
-			}
-		}
-
-	default: // headers.AuthDigest
-		if auth.DigestValues.Realm == nil {
-			return fmt.Errorf("realm is missing")
-		}
-
-		if auth.DigestValues.Nonce == nil {
-			return fmt.Errorf("nonce is missing")
-		}
-
-		if auth.DigestValues.Username == nil {
-			return fmt.Errorf("username is missing")
-		}
-
-		if auth.DigestValues.URI == nil {
-			return fmt.Errorf("uri is missing")
-		}
-
-		if auth.DigestValues.Response == nil {
-			return fmt.Errorf("response is missing")
-		}
-
-		if *auth.DigestValues.Nonce != va.nonce {
-			return fmt.Errorf("wrong nonce")
-		}
-
-		if *auth.DigestValues.Realm != va.realm {
-			return fmt.Errorf("wrong realm")
-		}
-
-		if *auth.DigestValues.Username != va.user {
-			return fmt.Errorf("wrong username")
-		}
-
-		ur := req.URL
-
-		if *auth.DigestValues.URI != ur.String() {
-			// in SETUP requests, VLC strips the control attribute.
-			// try again with the base URL.
-			if baseURL != nil {
-				ur = baseURL
-				if *auth.DigestValues.URI != ur.String() {
-					return fmt.Errorf("wrong URL")
-				}
-			} else {
-				return fmt.Errorf("wrong URL")
-			}
-		}
-
-		response := md5Hex(md5Hex(va.user+":"+va.realm+":"+va.pass) +
-			":" + va.nonce + ":" + md5Hex(string(req.Method)+":"+ur.String()))
-
-		if *auth.DigestValues.Response != response {
-			return fmt.Errorf("wrong response")
-		}
-	}
-
-	return nil
-}
diff --git a/pkg/auth/validator_test.go b/pkg/auth/validator_test.go
deleted file mode 100644
index f43537b0..00000000
--- a/pkg/auth/validator_test.go
+++ /dev/null
@@ -1,71 +0,0 @@
-package auth
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/require"
-
-	"github.com/bluenviron/gortsplib/v4/pkg/base"
-)
-
-func TestValidatorErrors(t *testing.T) {
-	for _, ca := range []struct {
-		name string
-		hv   base.HeaderValue
-		err  string
-	}{
-		{
-			"invalid auth",
-			base.HeaderValue{`Invalid`},
-			"invalid authorization header",
-		},
-		{
-			"digest missing realm",
-			base.HeaderValue{`Digest `},
-			"realm is missing",
-		},
-		{
-			"digest missing nonce",
-			base.HeaderValue{`Digest realm=123`},
-			"nonce is missing",
-		},
-		{
-			"digest missing username",
-			base.HeaderValue{`Digest realm=123,nonce=123`},
-			"username is missing",
-		},
-		{
-			"digest missing uri",
-			base.HeaderValue{`Digest realm=123,nonce=123,username=123`},
-			"uri is missing",
-		},
-		{
-			"digest missing response",
-			base.HeaderValue{`Digest realm=123,nonce=123,username=123,uri=123`},
-			"response is missing",
-		},
-		{
-			"digest wrong nonce",
-			base.HeaderValue{`Digest realm=123,nonce=123,username=123,uri=123,response=123`},
-			"wrong nonce",
-		},
-		{
-			"digest wrong realm",
-			base.HeaderValue{`Digest realm=123,nonce=abcde,username=123,uri=123,response=123`},
-			"wrong realm",
-		},
-	} {
-		t.Run(ca.name, func(t *testing.T) {
-			va := NewValidator("myuser", "mypass", nil)
-			va.nonce = "abcde"
-			err := va.ValidateRequest(&base.Request{
-				Method: base.Describe,
-				URL:    nil,
-				Header: base.Header{
-					"Authorization": ca.hv,
-				},
-			}, nil)
-			require.EqualError(t, err, ca.err)
-		})
-	}
-}
diff --git a/pkg/formats/av1.go b/pkg/formats/av1.go
index b39445aa..5a947b08 100644
--- a/pkg/formats/av1.go
+++ b/pkg/formats/av1.go
@@ -60,13 +60,6 @@ func (f *AV1) Codec() string {
 	return "AV1"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *AV1) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *AV1) ClockRate() int {
 	return 90000
@@ -104,14 +97,6 @@ func (f *AV1) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *AV1) CreateDecoder() *rtpav1.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *AV1) CreateDecoder2() (*rtpav1.Decoder, error) {
 	d := &rtpav1.Decoder{}
@@ -124,14 +109,6 @@ func (f *AV1) CreateDecoder2() (*rtpav1.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *AV1) CreateEncoder() *rtpav1.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *AV1) CreateEncoder2() (*rtpav1.Encoder, error) {
 	e := &rtpav1.Encoder{
diff --git a/pkg/formats/av1_test.go b/pkg/formats/av1_test.go
index ce4d327b..82319a1d 100644
--- a/pkg/formats/av1_test.go
+++ b/pkg/formats/av1_test.go
@@ -11,7 +11,7 @@ func TestAV1Attributes(t *testing.T) {
 	format := &AV1{
 		PayloadTyp: 100,
 	}
-	require.Equal(t, "AV1", format.String())
+	require.Equal(t, "AV1", format.Codec())
 	require.Equal(t, 90000, format.ClockRate())
 	require.Equal(t, true, format.PTSEqualsDTS(&rtp.Packet{}))
 }
diff --git a/pkg/formats/format.go b/pkg/formats/format.go
index 688fa94b..8e475a89 100644
--- a/pkg/formats/format.go
+++ b/pkg/formats/format.go
@@ -24,9 +24,6 @@ type Format interface {
 	// Codec returns the codec name.
 	Codec() string
 
-	// Deprecated: replaced by Codec().
-	String() string
-
 	// ClockRate returns the clock rate.
 	ClockRate() int
 
diff --git a/pkg/formats/g711.go b/pkg/formats/g711.go
index 105ea8a5..ebaadea9 100644
--- a/pkg/formats/g711.go
+++ b/pkg/formats/g711.go
@@ -23,13 +23,6 @@ func (f *G711) Codec() string {
 	return "G711"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *G711) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *G711) ClockRate() int {
 	return 8000
@@ -61,14 +54,6 @@ func (f *G711) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *G711) CreateDecoder() *rtpsimpleaudio.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *G711) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
 	d := &rtpsimpleaudio.Decoder{
@@ -83,14 +68,6 @@ func (f *G711) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *G711) CreateEncoder() *rtpsimpleaudio.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *G711) CreateEncoder2() (*rtpsimpleaudio.Encoder, error) {
 	e := &rtpsimpleaudio.Encoder{
diff --git a/pkg/formats/g722.go b/pkg/formats/g722.go
index 60853730..0fb62824 100644
--- a/pkg/formats/g722.go
+++ b/pkg/formats/g722.go
@@ -19,13 +19,6 @@ func (f *G722) Codec() string {
 	return "G722"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *G722) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *G722) ClockRate() int {
 	return 8000
@@ -51,14 +44,6 @@ func (f *G722) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *G722) CreateDecoder() *rtpsimpleaudio.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *G722) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
 	d := &rtpsimpleaudio.Decoder{
@@ -73,14 +58,6 @@ func (f *G722) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *G722) CreateEncoder() *rtpsimpleaudio.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *G722) CreateEncoder2() (*rtpsimpleaudio.Encoder, error) {
 	e := &rtpsimpleaudio.Encoder{
diff --git a/pkg/formats/g726.go b/pkg/formats/g726.go
index a15fb9f8..c0028c52 100644
--- a/pkg/formats/g726.go
+++ b/pkg/formats/g726.go
@@ -41,13 +41,6 @@ func (f *G726) Codec() string {
 	return "G726"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *G726) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *G726) ClockRate() int {
 	return 8000
diff --git a/pkg/formats/generic.go b/pkg/formats/generic.go
index 2f8bb48a..74d338b2 100644
--- a/pkg/formats/generic.go
+++ b/pkg/formats/generic.go
@@ -80,13 +80,6 @@ func (f *Generic) Codec() string {
 	return "Generic"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *Generic) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *Generic) ClockRate() int {
 	return f.ClockRat
diff --git a/pkg/formats/h264.go b/pkg/formats/h264.go
index ac0f9ab3..95c269a3 100644
--- a/pkg/formats/h264.go
+++ b/pkg/formats/h264.go
@@ -65,13 +65,6 @@ func (f *H264) Codec() string {
 	return "H264"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *H264) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *H264) ClockRate() int {
 	return 90000
@@ -172,14 +165,6 @@ func (f *H264) PTSEqualsDTS(pkt *rtp.Packet) bool {
 	return false
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *H264) CreateDecoder() *rtph264.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *H264) CreateDecoder2() (*rtph264.Decoder, error) {
 	d := &rtph264.Decoder{
@@ -194,14 +179,6 @@ func (f *H264) CreateDecoder2() (*rtph264.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *H264) CreateEncoder() *rtph264.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *H264) CreateEncoder2() (*rtph264.Encoder, error) {
 	e := &rtph264.Encoder{
diff --git a/pkg/formats/h265.go b/pkg/formats/h265.go
index ea3b39eb..d075d2ad 100644
--- a/pkg/formats/h265.go
+++ b/pkg/formats/h265.go
@@ -67,13 +67,6 @@ func (f *H265) Codec() string {
 	return "H265"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *H265) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *H265) ClockRate() int {
 	return 90000
@@ -171,14 +164,6 @@ func (f *H265) PTSEqualsDTS(pkt *rtp.Packet) bool {
 	return false
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *H265) CreateDecoder() *rtph265.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *H265) CreateDecoder2() (*rtph265.Decoder, error) {
 	d := &rtph265.Decoder{
@@ -193,14 +178,6 @@ func (f *H265) CreateDecoder2() (*rtph265.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *H265) CreateEncoder() *rtph265.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *H265) CreateEncoder2() (*rtph265.Encoder, error) {
 	e := &rtph265.Encoder{
diff --git a/pkg/formats/lpcm.go b/pkg/formats/lpcm.go
index b1cbc36b..03de4e9e 100644
--- a/pkg/formats/lpcm.go
+++ b/pkg/formats/lpcm.go
@@ -58,13 +58,6 @@ func (f *LPCM) Codec() string {
 	return "LPCM"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *LPCM) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *LPCM) ClockRate() int {
 	return f.SampleRate
@@ -103,14 +96,6 @@ func (f *LPCM) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *LPCM) CreateDecoder() *rtplpcm.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *LPCM) CreateDecoder2() (*rtplpcm.Decoder, error) {
 	d := &rtplpcm.Decoder{
@@ -127,14 +112,6 @@ func (f *LPCM) CreateDecoder2() (*rtplpcm.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *LPCM) CreateEncoder() *rtplpcm.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *LPCM) CreateEncoder2() (*rtplpcm.Encoder, error) {
 	e := &rtplpcm.Encoder{
diff --git a/pkg/formats/mjpeg.go b/pkg/formats/mjpeg.go
index 56811451..8844f867 100644
--- a/pkg/formats/mjpeg.go
+++ b/pkg/formats/mjpeg.go
@@ -19,13 +19,6 @@ func (f *MJPEG) Codec() string {
 	return "M-JPEG"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MJPEG) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MJPEG) ClockRate() int {
 	return 90000
@@ -51,14 +44,6 @@ func (f *MJPEG) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *MJPEG) CreateDecoder() *rtpmjpeg.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *MJPEG) CreateDecoder2() (*rtpmjpeg.Decoder, error) {
 	d := &rtpmjpeg.Decoder{}
@@ -71,14 +56,6 @@ func (f *MJPEG) CreateDecoder2() (*rtpmjpeg.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *MJPEG) CreateEncoder() *rtpmjpeg.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *MJPEG) CreateEncoder2() (*rtpmjpeg.Encoder, error) {
 	e := &rtpmjpeg.Encoder{}
diff --git a/pkg/formats/mpeg1_audio.go b/pkg/formats/mpeg1_audio.go
index cc66e185..6d9ebe28 100644
--- a/pkg/formats/mpeg1_audio.go
+++ b/pkg/formats/mpeg1_audio.go
@@ -19,13 +19,6 @@ func (f *MPEG1Audio) Codec() string {
 	return "MPEG-1/2 Audio"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MPEG1Audio) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MPEG1Audio) ClockRate() int {
 	return 90000
@@ -51,14 +44,6 @@ func (f *MPEG1Audio) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *MPEG1Audio) CreateDecoder() *rtpmpeg1audio.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *MPEG1Audio) CreateDecoder2() (*rtpmpeg1audio.Decoder, error) {
 	d := &rtpmpeg1audio.Decoder{}
@@ -71,14 +56,6 @@ func (f *MPEG1Audio) CreateDecoder2() (*rtpmpeg1audio.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *MPEG1Audio) CreateEncoder() *rtpmpeg1audio.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *MPEG1Audio) CreateEncoder2() (*rtpmpeg1audio.Encoder, error) {
 	e := &rtpmpeg1audio.Encoder{}
@@ -90,8 +67,3 @@ func (f *MPEG1Audio) CreateEncoder2() (*rtpmpeg1audio.Encoder, error) {
 
 	return e, nil
 }
-
-// MPEG2Audio is an alias for MPEG1Audio.
-//
-// Deprecated: replaced by MPEG1Audio.
-type MPEG2Audio = MPEG1Audio
diff --git a/pkg/formats/mpeg1_video.go b/pkg/formats/mpeg1_video.go
index 2c43c9cc..1e861446 100644
--- a/pkg/formats/mpeg1_video.go
+++ b/pkg/formats/mpeg1_video.go
@@ -17,13 +17,6 @@ func (f *MPEG1Video) Codec() string {
 	return "MPEG-1/2 Video"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MPEG1Video) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MPEG1Video) ClockRate() int {
 	return 90000
@@ -48,8 +41,3 @@ func (f *MPEG1Video) FMTP() map[string]string {
 func (f *MPEG1Video) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
-
-// MPEG2Video is an alias for MPEG1Video.
-//
-// Deprecated: replaced by MPEG1Video.
-type MPEG2Video = MPEG1Video
diff --git a/pkg/formats/mpeg4_audio_generic.go b/pkg/formats/mpeg4_audio_generic.go
index 5bffe4fa..b1205446 100644
--- a/pkg/formats/mpeg4_audio_generic.go
+++ b/pkg/formats/mpeg4_audio_generic.go
@@ -103,13 +103,6 @@ func (f *MPEG4AudioGeneric) Codec() string {
 	return "MPEG-4 Audio"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MPEG4AudioGeneric) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MPEG4AudioGeneric) ClockRate() int {
 	return f.Config.SampleRate
@@ -176,14 +169,6 @@ func (f *MPEG4AudioGeneric) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *MPEG4AudioGeneric) CreateDecoder() *rtpmpeg4audio.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *MPEG4AudioGeneric) CreateDecoder2() (*rtpmpeg4audio.Decoder, error) {
 	d := &rtpmpeg4audio.Decoder{
@@ -201,14 +186,6 @@ func (f *MPEG4AudioGeneric) CreateDecoder2() (*rtpmpeg4audio.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *MPEG4AudioGeneric) CreateEncoder() *rtpmpeg4audio.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *MPEG4AudioGeneric) CreateEncoder2() (*rtpmpeg4audio.Encoder, error) {
 	e := &rtpmpeg4audio.Encoder{
diff --git a/pkg/formats/mpeg4_audio_latm.go b/pkg/formats/mpeg4_audio_latm.go
index 3d367f1c..5645ef39 100644
--- a/pkg/formats/mpeg4_audio_latm.go
+++ b/pkg/formats/mpeg4_audio_latm.go
@@ -90,13 +90,6 @@ func (f *MPEG4AudioLATM) Codec() string {
 	return "MPEG-4 Audio"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MPEG4AudioLATM) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MPEG4AudioLATM) ClockRate() int {
 	return f.Config.Programs[0].Layers[0].AudioSpecificConfig.SampleRate
@@ -164,14 +157,6 @@ func (f *MPEG4AudioLATM) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *MPEG4AudioLATM) CreateDecoder() *rtpmpeg4audiolatm.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *MPEG4AudioLATM) CreateDecoder2() (*rtpmpeg4audiolatm.Decoder, error) {
 	d := &rtpmpeg4audiolatm.Decoder{
@@ -186,14 +171,6 @@ func (f *MPEG4AudioLATM) CreateDecoder2() (*rtpmpeg4audiolatm.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *MPEG4AudioLATM) CreateEncoder() *rtpmpeg4audiolatm.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *MPEG4AudioLATM) CreateEncoder2() (*rtpmpeg4audiolatm.Encoder, error) {
 	e := &rtpmpeg4audiolatm.Encoder{
diff --git a/pkg/formats/mpeg4_video_es.go b/pkg/formats/mpeg4_video_es.go
index cf8ff6aa..5e582731 100644
--- a/pkg/formats/mpeg4_video_es.go
+++ b/pkg/formats/mpeg4_video_es.go
@@ -56,13 +56,6 @@ func (f *MPEG4VideoES) Codec() string {
 	return "MPEG-4 Video"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MPEG4VideoES) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MPEG4VideoES) ClockRate() int {
 	return 90000
@@ -93,14 +86,6 @@ func (f *MPEG4VideoES) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *MPEG4VideoES) CreateDecoder() *rtpmpeg4video.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *MPEG4VideoES) CreateDecoder2() (*rtpmpeg4video.Decoder, error) {
 	d := &rtpmpeg4video.Decoder{}
@@ -113,14 +98,6 @@ func (f *MPEG4VideoES) CreateDecoder2() (*rtpmpeg4video.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *MPEG4VideoES) CreateEncoder() *rtpmpeg4video.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *MPEG4VideoES) CreateEncoder2() (*rtpmpeg4video.Encoder, error) {
 	e := &rtpmpeg4video.Encoder{
diff --git a/pkg/formats/mpegts.go b/pkg/formats/mpegts.go
index b68c48c0..2050edcb 100644
--- a/pkg/formats/mpegts.go
+++ b/pkg/formats/mpegts.go
@@ -17,13 +17,6 @@ func (f *MPEGTS) Codec() string {
 	return "MPEG-TS"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *MPEGTS) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *MPEGTS) ClockRate() int {
 	return 90000
diff --git a/pkg/formats/opus.go b/pkg/formats/opus.go
index 8842dbca..1831561d 100644
--- a/pkg/formats/opus.go
+++ b/pkg/formats/opus.go
@@ -49,13 +49,6 @@ func (f *Opus) Codec() string {
 	return "Opus"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *Opus) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *Opus) ClockRate() int {
 	// RFC7587: the RTP timestamp is incremented with a 48000 Hz
@@ -93,14 +86,6 @@ func (f *Opus) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *Opus) CreateDecoder() *rtpsimpleaudio.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *Opus) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
 	d := &rtpsimpleaudio.Decoder{
@@ -115,14 +100,6 @@ func (f *Opus) CreateDecoder2() (*rtpsimpleaudio.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *Opus) CreateEncoder() *rtpsimpleaudio.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *Opus) CreateEncoder2() (*rtpsimpleaudio.Encoder, error) {
 	e := &rtpsimpleaudio.Encoder{
diff --git a/pkg/formats/rtpav1/decoder.go b/pkg/formats/rtpav1/decoder.go
index 0c0641ee..33985930 100644
--- a/pkg/formats/rtpav1/decoder.go
+++ b/pkg/formats/rtpav1/decoder.go
@@ -51,13 +51,6 @@ func (d *Decoder) Init() error {
 	return nil
 }
 
-// Decode decodes OBUs from a RTP packet.
-//
-// Deprecated: this method returns incomplete temporal units.
-func (d *Decoder) Decode(pkt *rtp.Packet) ([][]byte, time.Duration, error) {
-	return d.decodeOBUs(pkt)
-}
-
 func (d *Decoder) decodeOBUs(pkt *rtp.Packet) ([][]byte, time.Duration, error) {
 	var av1header codecs.AV1Packet
 	_, err := av1header.Unmarshal(pkt.Payload)
diff --git a/pkg/formats/rtph264/decoder.go b/pkg/formats/rtph264/decoder.go
index d2582102..3909c29b 100644
--- a/pkg/formats/rtph264/decoder.go
+++ b/pkg/formats/rtph264/decoder.go
@@ -59,13 +59,6 @@ func (d *Decoder) Init() error {
 	return nil
 }
 
-// Decode decodes NALUs from a RTP packet.
-//
-// Deprecated: this method returns incomplete access units.
-func (d *Decoder) Decode(pkt *rtp.Packet) ([][]byte, time.Duration, error) {
-	return d.decodeNALUs(pkt)
-}
-
 func (d *Decoder) decodeNALUs(pkt *rtp.Packet) ([][]byte, time.Duration, error) {
 	if len(pkt.Payload) < 1 {
 		d.fragments = d.fragments[:0] // discard pending fragments
diff --git a/pkg/formats/rtph265/decoder.go b/pkg/formats/rtph265/decoder.go
index 72410048..9739188a 100644
--- a/pkg/formats/rtph265/decoder.go
+++ b/pkg/formats/rtph265/decoder.go
@@ -57,13 +57,6 @@ func (d *Decoder) Init() error {
 	return nil
 }
 
-// Decode decodes NALUs from a RTP packet.
-//
-// Deprecated: this method returns incomplete access units.
-func (d *Decoder) Decode(pkt *rtp.Packet) ([][]byte, time.Duration, error) {
-	return d.decodeNALUs(pkt)
-}
-
 func (d *Decoder) decodeNALUs(pkt *rtp.Packet) ([][]byte, time.Duration, error) {
 	if len(pkt.Payload) < 2 {
 		d.fragments = d.fragments[:0] // discard pending fragments
diff --git a/pkg/formats/rtpmpeg2audio/rtpmpeg2audio.go b/pkg/formats/rtpmpeg2audio/rtpmpeg2audio.go
deleted file mode 100644
index ef24bad4..00000000
--- a/pkg/formats/rtpmpeg2audio/rtpmpeg2audio.go
+++ /dev/null
@@ -1,26 +0,0 @@
-// Package rtpmpeg2audio contains a RTP/MPEG-1/2 Audio decoder and encoder.
-package rtpmpeg2audio
-
-import (
-	"github.com/bluenviron/gortsplib/v4/pkg/formats/rtpmpeg1audio"
-)
-
-// ErrMorePacketsNeeded is an alis for rtpmpeg1audio.ErrMorePacketsNeeded.
-//
-// Deprecated: replaced by rtpmpeg1audio.ErrMorePacketsNeeded.
-var ErrMorePacketsNeeded = rtpmpeg1audio.ErrMorePacketsNeeded
-
-// ErrNonStartingPacketAndNoPrevious is an alis for rtpmpeg1audio.ErrNonStartingPacketAndNoPrevious.
-//
-// Deprecated: replaced by rtpmpeg1audio.ErrNonStartingPacketAndNoPrevious.
-var ErrNonStartingPacketAndNoPrevious = rtpmpeg1audio.ErrNonStartingPacketAndNoPrevious
-
-// Decoder is an alis for rtpmpeg1audio.Decoder.
-//
-// Deprecated: replaced by rtpmpeg1audio.Decoder.
-type Decoder = rtpmpeg1audio.Decoder
-
-// Encoder is an alis for rtpmpeg1audio.Encoder.
-//
-// Deprecated: replaced by rtpmpeg1audio.Encoder.
-type Encoder = rtpmpeg1audio.Encoder
diff --git a/pkg/formats/vorbis.go b/pkg/formats/vorbis.go
index 7e05295b..18c0d472 100644
--- a/pkg/formats/vorbis.go
+++ b/pkg/formats/vorbis.go
@@ -61,13 +61,6 @@ func (f *Vorbis) Codec() string {
 	return "Vorbis"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *Vorbis) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *Vorbis) ClockRate() int {
 	return f.SampleRate
diff --git a/pkg/formats/vp8.go b/pkg/formats/vp8.go
index aadbf72d..39cfaa83 100644
--- a/pkg/formats/vp8.go
+++ b/pkg/formats/vp8.go
@@ -50,13 +50,6 @@ func (f *VP8) Codec() string {
 	return "VP8"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *VP8) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *VP8) ClockRate() int {
 	return 90000
@@ -92,14 +85,6 @@ func (f *VP8) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *VP8) CreateDecoder() *rtpvp8.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *VP8) CreateDecoder2() (*rtpvp8.Decoder, error) {
 	d := &rtpvp8.Decoder{}
@@ -112,14 +97,6 @@ func (f *VP8) CreateDecoder2() (*rtpvp8.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *VP8) CreateEncoder() *rtpvp8.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *VP8) CreateEncoder2() (*rtpvp8.Encoder, error) {
 	e := &rtpvp8.Encoder{
diff --git a/pkg/formats/vp9.go b/pkg/formats/vp9.go
index 32a9a4f8..865608dd 100644
--- a/pkg/formats/vp9.go
+++ b/pkg/formats/vp9.go
@@ -60,13 +60,6 @@ func (f *VP9) Codec() string {
 	return "VP9"
 }
 
-// String implements Format.
-//
-// Deprecated: replaced by Codec().
-func (f *VP9) String() string {
-	return f.Codec()
-}
-
 // ClockRate implements Format.
 func (f *VP9) ClockRate() int {
 	return 90000
@@ -104,14 +97,6 @@ func (f *VP9) PTSEqualsDTS(*rtp.Packet) bool {
 	return true
 }
 
-// CreateDecoder creates a decoder able to decode the content of the format.
-//
-// Deprecated: this has been replaced by CreateDecoder2() that can also return an error.
-func (f *VP9) CreateDecoder() *rtpvp9.Decoder {
-	d, _ := f.CreateDecoder2()
-	return d
-}
-
 // CreateDecoder2 creates a decoder able to decode the content of the format.
 func (f *VP9) CreateDecoder2() (*rtpvp9.Decoder, error) {
 	d := &rtpvp9.Decoder{}
@@ -124,14 +109,6 @@ func (f *VP9) CreateDecoder2() (*rtpvp9.Decoder, error) {
 	return d, nil
 }
 
-// CreateEncoder creates an encoder able to encode the content of the format.
-//
-// Deprecated: this has been replaced by CreateEncoder2() that can also return an error.
-func (f *VP9) CreateEncoder() *rtpvp9.Encoder {
-	e, _ := f.CreateEncoder2()
-	return e
-}
-
 // CreateEncoder2 creates an encoder able to encode the content of the format.
 func (f *VP9) CreateEncoder2() (*rtpvp9.Encoder, error) {
 	e := &rtpvp9.Encoder{
diff --git a/server_handler.go b/server_handler.go
index 511dbb4d..6ec8a5b8 100644
--- a/server_handler.go
+++ b/server_handler.go
@@ -194,21 +194,6 @@ type ServerHandlerOnSetParameter interface {
 	OnSetParameter(*ServerHandlerOnSetParameterCtx) (*base.Response, error)
 }
 
-// ServerHandlerOnWarningCtx is the context of OnWarning.
-//
-// Deprecated: ServerHandlerOnWarning is deprecated.
-type ServerHandlerOnWarningCtx struct {
-	Session *ServerSession
-	Error   error
-}
-
-// ServerHandlerOnWarning can be implemented by a ServerHandler.
-//
-// Deprecated: replaced by OnPacketLost, OnDecodeError.
-type ServerHandlerOnWarning interface {
-	OnWarning(*ServerHandlerOnWarningCtx)
-}
-
 // ServerHandlerOnPacketLostCtx is the context of OnPacketLost.
 type ServerHandlerOnPacketLostCtx struct {
 	Session *ServerSession
diff --git a/server_session.go b/server_session.go
index 5a940c36..bbd3175b 100644
--- a/server_session.go
+++ b/server_session.go
@@ -251,11 +251,6 @@ func (ss *ServerSession) onPacketLost(err error) {
 			Session: ss,
 			Error:   err,
 		})
-	} else if h, ok := ss.s.Handler.(ServerHandlerOnWarning); ok {
-		h.OnWarning(&ServerHandlerOnWarningCtx{
-			Session: ss,
-			Error:   err,
-		})
 	}
 }
 
@@ -265,11 +260,6 @@ func (ss *ServerSession) onDecodeError(err error) {
 			Session: ss,
 			Error:   err,
 		})
-	} else if h, ok := ss.s.Handler.(ServerHandlerOnWarning); ok {
-		h.OnWarning(&ServerHandlerOnWarningCtx{
-			Session: ss,
-			Error:   err,
-		})
 	}
 }