diff --git a/client.go b/client.go
index 2f9e8313..a2e5772c 100644
--- a/client.go
+++ b/client.go
@@ -225,10 +225,6 @@ type Client struct {
 	OnRequest func(*base.Request)
 	// called after every response.
 	OnResponse func(*base.Response)
-	// Deprecated. replaced by Log.
-	OnWarning func(error)
-	// Deprecated. replaced by Log.
-	OnDecodeError func(error)
 
 	//
 	// logging (all optional)
@@ -339,16 +335,6 @@ func (c *Client) Start(scheme string, host string) error {
 		c.OnResponse = func(*base.Response) {
 		}
 	}
-	if c.OnDecodeError != nil {
-		c.Log = func(level LogLevel, format string, args ...interface{}) {
-			c.OnDecodeError(fmt.Errorf(format, args...))
-		}
-	}
-	if c.OnWarning != nil {
-		c.Log = func(level LogLevel, format string, args ...interface{}) {
-			c.OnDecodeError(fmt.Errorf(format, args...))
-		}
-	}
 
 	if c.Log == nil {
 		c.Log = defaultLog
diff --git a/server_handler.go b/server_handler.go
index 9da6ac81..2050eb55 100644
--- a/server_handler.go
+++ b/server_handler.go
@@ -205,19 +205,3 @@ type ServerHandlerOnWarning interface {
 	// called when there's a non-fatal decoding error of RTP or RTCP packets.
 	OnWarning(*ServerHandlerOnWarningCtx)
 }
-
-// ServerHandlerOnDecodeErrorCtx is the context of OnDecodeError.
-//
-// Deprecated. Replaced by ServerHandlerOnWarningCtx.
-type ServerHandlerOnDecodeErrorCtx struct {
-	Session *ServerSession
-	Error   error
-}
-
-// ServerHandlerOnDecodeError can be implemented by a ServerHandler.
-//
-// Deprecated. Replaced by ServerHandlerOnWarning.
-type ServerHandlerOnDecodeError interface {
-	// called when there's a non-fatal decoding error of RTP or RTCP packets.
-	OnDecodeError(*ServerHandlerOnDecodeErrorCtx)
-}
diff --git a/server_udpl.go b/server_udpl.go
index 13e5dfde..58f80abd 100644
--- a/server_udpl.go
+++ b/server_udpl.go
@@ -44,11 +44,6 @@ func onWarning(ss *ServerSession, err error) {
 			Session: ss,
 			Error:   err,
 		})
-	} else if h, ok := ss.s.Handler.(ServerHandlerOnDecodeError); ok {
-		h.OnDecodeError(&ServerHandlerOnDecodeErrorCtx{
-			Session: ss,
-			Error:   err,
-		})
 	}
 }