diff --git a/internal/rtsp/rtsp.go b/internal/rtsp/rtsp.go
index a4075f6c..cc6d5727 100644
--- a/internal/rtsp/rtsp.go
+++ b/internal/rtsp/rtsp.go
@@ -192,7 +192,14 @@ func tcpHandler(conn *rtsp.Conn) {
 			conn.Connection.Source = query.Get("source")
 
 			if err := stream.AddConsumer(conn); err != nil {
-				log.Warn().Err(err).Str("stream", name).Msg("[rtsp]")
+				logEvent := log.Warn()
+
+				if _, ok := err.(*streams.CodecNotMatchedError); ok && strings.HasPrefix(query.Get("source"), "ffmpeg") {
+					// lower codec not matched error for ffmpeg to debug
+					logEvent = log.Debug()
+				}
+
+				logEvent.Err(err).Str("stream", name).Msg("[rtsp]")
 				return
 			}
 
diff --git a/internal/streams/add_consumer.go b/internal/streams/add_consumer.go
index d72e17ee..0b8f6cf0 100644
--- a/internal/streams/add_consumer.go
+++ b/internal/streams/add_consumer.go
@@ -130,25 +130,10 @@ func formatError(consMedias, prodMedias []*core.Media, prodErrors []error) error
 
 	// 2. Return "codecs not matched"
 	if prodMedias != nil {
-		var prod, cons string
-
-		for _, media := range prodMedias {
-			if media.Direction == core.DirectionRecvonly {
-				for _, codec := range media.Codecs {
-					prod = appendString(prod, codec.PrintName())
-				}
-			}
+		return &CodecNotMatchedError{
+			producerMedias: prodMedias,
+			consumerMedias: consMedias,
 		}
-
-		for _, media := range consMedias {
-			if media.Direction == core.DirectionSendonly {
-				for _, codec := range media.Codecs {
-					cons = appendString(cons, codec.PrintName())
-				}
-			}
-		}
-
-		return errors.New("streams: codecs not matched: " + prod + " => " + cons)
 	}
 
 	// 3. Return unknown error
@@ -164,3 +149,30 @@ func appendString(s, elem string) string {
 	}
 	return s + ", " + elem
 }
+
+type CodecNotMatchedError struct {
+	producerMedias []*core.Media
+	consumerMedias []*core.Media
+}
+
+func (e *CodecNotMatchedError) Error() string {
+	var prod, cons string
+
+	for _, media := range e.producerMedias {
+		if media.Direction == core.DirectionRecvonly {
+			for _, codec := range media.Codecs {
+				prod = appendString(prod, codec.PrintName())
+			}
+		}
+	}
+
+	for _, media := range e.consumerMedias {
+		if media.Direction == core.DirectionSendonly {
+			for _, codec := range media.Codecs {
+				cons = appendString(cons, codec.PrintName())
+			}
+		}
+	}
+
+	return "streams: codecs not matched: " + prod + " => " + cons
+}