diff --git a/.golangci.yml b/.golangci.yml
index 9ab04e06..5c7573c1 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -9,6 +9,7 @@ linters:
   - gofumpt
   - golint
   - misspell
+  - lll
   - prealloc
   - unconvert
   disable:
diff --git a/internal/conf/path.go b/internal/conf/path.go
index 95d764e5..570ab0aa 100644
--- a/internal/conf/path.go
+++ b/internal/conf/path.go
@@ -75,7 +75,7 @@ type PathConf struct {
 	SourceAnyPortEnable        bool                      `yaml:"sourceAnyPortEnable" json:"sourceAnyPortEnable"`
 	SourceFingerprint          string                    `yaml:"sourceFingerprint" json:"sourceFingerprint"`
 	SourceOnDemand             bool                      `yaml:"sourceOnDemand" json:"sourceOnDemand"`
-	SourceOnDemandStartTimeout time.Duration             `yaml:"sourceOnDemandStartTimeout" json:"sourceOnDemandStartTimeout"`
+	SourceOnDemandStartTimeout time.Duration             `yaml:"sourceOnDemandStartTimeout" json:"sourceOnDemandStartTimeout"` //nolint:lll
 	SourceOnDemandCloseAfter   time.Duration             `yaml:"sourceOnDemandCloseAfter" json:"sourceOnDemandCloseAfter"`
 	SourceRedirect             string                    `yaml:"sourceRedirect" json:"sourceRedirect"`
 	DisablePublisherOverride   bool                      `yaml:"disablePublisherOverride" json:"disablePublisherOverride"`
@@ -272,7 +272,8 @@ func (pconf *PathConf) checkAndFillMissing(name string) error {
 	}
 	if pconf.PublishPass != "" {
 		if pconf.Source != "publisher" {
-			return fmt.Errorf("'publishPass' is useless when source is not 'publisher', since the stream is not provided by a publisher, but by a fixed source")
+			return fmt.Errorf("'publishPass' is useless when source is not 'publisher', since " +
+				"the stream is not provided by a publisher, but by a fixed source")
 		}
 
 		if !strings.HasPrefix(pconf.PublishPass, "sha256:") && !reUserPass.MatchString(pconf.PublishPass) {
@@ -289,7 +290,8 @@ func (pconf *PathConf) checkAndFillMissing(name string) error {
 		}
 
 		if pconf.Source != "publisher" {
-			return nil, fmt.Errorf("'publishIPs' is useless when source is not 'publisher', since the stream is not provided by a publisher, but by a fixed source")
+			return nil, fmt.Errorf("'publishIPs' is useless when source is not 'publisher', since " +
+				"the stream is not provided by a publisher, but by a fixed source")
 		}
 
 		return parseIPCidrList(pconf.PublishIPs)
@@ -326,7 +328,8 @@ func (pconf *PathConf) checkAndFillMissing(name string) error {
 	}
 
 	if pconf.RunOnPublish != "" && pconf.Source != "publisher" {
-		return fmt.Errorf("'runOnPublish' is useless when source is not 'publisher', since the stream is not provided by a publisher, but by a fixed source")
+		return fmt.Errorf("'runOnPublish' is useless when source is not 'publisher', since " +
+			"the stream is not provided by a publisher, but by a fixed source")
 	}
 
 	if pconf.RunOnDemand != "" && pconf.Source != "publisher" {
diff --git a/internal/core/api_test.go b/internal/core/api_test.go
index 636cc2a9..be78d319 100644
--- a/internal/core/api_test.go
+++ b/internal/core/api_test.go
@@ -96,7 +96,8 @@ func TestAPIConfigPathsAdd(t *testing.T) {
 	var out map[string]interface{}
 	err = httpRequest(http.MethodGet, "http://localhost:9997/v1/config/get", nil, &out)
 	require.NoError(t, err)
-	require.Equal(t, "rtsp://127.0.0.1:9999/mypath", out["paths"].(map[string]interface{})["mypath"].(map[string]interface{})["source"])
+	require.Equal(t, "rtsp://127.0.0.1:9999/mypath",
+		out["paths"].(map[string]interface{})["mypath"].(map[string]interface{})["source"])
 }
 
 func TestAPIConfigPathsEdit(t *testing.T) {
@@ -179,7 +180,8 @@ func TestAPIPathsList(t *testing.T) {
 	_, ok = out.Items["mypath"]
 	require.Equal(t, true, ok)
 
-	track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+	track, err := gortsplib.NewTrackH264(96,
+		&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 	require.NoError(t, err)
 
 	func() {
@@ -227,7 +229,8 @@ func TestAPIList(t *testing.T) {
 			require.Equal(t, true, ok)
 			defer p.close()
 
-			track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+			track, err := gortsplib.NewTrackH264(96,
+				&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 			require.NoError(t, err)
 
 			switch ca {
@@ -308,7 +311,8 @@ func TestAPIKick(t *testing.T) {
 			require.Equal(t, true, ok)
 			defer p.close()
 
-			track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+			track, err := gortsplib.NewTrackH264(96,
+				&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 			require.NoError(t, err)
 
 			switch ca {
diff --git a/internal/core/core.go b/internal/core/core.go
index af9221bd..44b6d57e 100644
--- a/internal/core/core.go
+++ b/internal/core/core.go
@@ -49,7 +49,8 @@ func New(args []string) (*Core, bool) {
 		"rtsp-simple-server "+version+"\n\nRTSP server.")
 
 	argVersion := k.Flag("version", "print version").Bool()
-	argConfPath := k.Arg("confpath", "path to a config file. The default is rtsp-simple-server.yml.").Default("rtsp-simple-server.yml").String()
+	argConfPath := k.Arg("confpath", "path to a config file. The default is rtsp-simple-server.yml.").
+		Default("rtsp-simple-server.yml").String()
 
 	kingpin.MustParse(k.Parse(args))
 
diff --git a/internal/core/core_test.go b/internal/core/core_test.go
index eced0b5e..1380a67d 100644
--- a/internal/core/core_test.go
+++ b/internal/core/core_test.go
@@ -153,7 +153,8 @@ func TestCoreHotReloading(t *testing.T) {
 
 	err := ioutil.WriteFile(confPath, []byte("paths:\n"+
 		"  test1:\n"+
-		"    runOnDemand: ffmpeg -hide_banner -loglevel error -re -i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH\n"+
+		"    runOnDemand: ffmpeg -hide_banner -loglevel error -re "+
+		"-i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH\n"+
 		"  test3:\n"+
 		"    runOnInit: echo aaa\n"+
 		"  test4:\n"+
@@ -178,7 +179,8 @@ func TestCoreHotReloading(t *testing.T) {
 
 	err = ioutil.WriteFile(confPath, []byte("paths:\n"+
 		"  test2:\n"+
-		"    runOnDemand: ffmpeg -hide_banner -loglevel error -re -i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH\n"+
+		"    runOnDemand: ffmpeg -hide_banner -loglevel error -re "+
+		"-i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH\n"+
 		"  test3:\n"+
 		"  test4:\n"+
 		"    runOnInit: echo bbb\n"),
diff --git a/internal/core/metrics_test.go b/internal/core/metrics_test.go
index ae7b5121..3c35b4ab 100644
--- a/internal/core/metrics_test.go
+++ b/internal/core/metrics_test.go
@@ -27,7 +27,8 @@ func TestMetrics(t *testing.T) {
 	require.Equal(t, true, ok)
 	defer p.close()
 
-	track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+	track, err := gortsplib.NewTrackH264(96,
+		&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 	require.NoError(t, err)
 
 	source, err := gortsplib.DialPublish("rtsp://localhost:8554/mypath",
diff --git a/internal/core/rtsp_conn.go b/internal/core/rtsp_conn.go
index 80acf74d..01b5f2ff 100644
--- a/internal/core/rtsp_conn.go
+++ b/internal/core/rtsp_conn.go
@@ -186,7 +186,8 @@ func (c *rtspConn) OnResponse(res *base.Response) {
 }
 
 // OnDescribe is called by rtspServer.
-func (c *rtspConn) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*base.Response, *gortsplib.ServerStream, error) {
+func (c *rtspConn) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx,
+) (*base.Response, *gortsplib.ServerStream, error) {
 	res := c.pathManager.OnDescribe(pathDescribeReq{
 		PathName: ctx.Path,
 		URL:      ctx.Req.URL,
diff --git a/internal/core/rtsp_server.go b/internal/core/rtsp_server.go
index a5354bb0..4d241362 100644
--- a/internal/core/rtsp_server.go
+++ b/internal/core/rtsp_server.go
@@ -303,7 +303,8 @@ func (s *rtspServer) OnSessionClose(ctx *gortsplib.ServerHandlerOnSessionCloseCt
 }
 
 // OnDescribe implements gortsplib.ServerHandlerOnDescribe.
-func (s *rtspServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*base.Response, *gortsplib.ServerStream, error) {
+func (s *rtspServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx,
+) (*base.Response, *gortsplib.ServerStream, error) {
 	s.mutex.RLock()
 	c := s.conns[ctx.Conn]
 	s.mutex.RUnlock()
diff --git a/internal/core/rtsp_server_test.go b/internal/core/rtsp_server_test.go
index afe6c3a4..72dc1d75 100644
--- a/internal/core/rtsp_server_test.go
+++ b/internal/core/rtsp_server_test.go
@@ -175,7 +175,8 @@ func TestRTSPServerPublishRead(t *testing.T) {
 				}()
 
 				cnt2, err := newContainer("gstreamer", "read", []string{
-					"rtspsrc location=" + proto + "://127.0.0.1:" + port + "/teststream protocols=" + ps + " tls-validation-flags=0 latency=0 " +
+					"rtspsrc location=" + proto + "://127.0.0.1:" + port + "/teststream protocols=" + ps +
+						" tls-validation-flags=0 latency=0 " +
 						"! application/x-rtp,media=video ! decodebin ! exitafterframe ! fakesink",
 				})
 				require.NoError(t, err)
@@ -354,7 +355,8 @@ func TestRTSPServerAuthFail(t *testing.T) {
 			require.Equal(t, true, ok)
 			defer p.close()
 
-			track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+			track, err := gortsplib.NewTrackH264(96,
+				&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 			require.NoError(t, err)
 
 			_, err = gortsplib.DialPublish(
@@ -412,7 +414,8 @@ func TestRTSPServerAuthFail(t *testing.T) {
 		require.Equal(t, true, ok)
 		defer p.close()
 
-		track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+		track, err := gortsplib.NewTrackH264(96,
+			&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 		require.NoError(t, err)
 
 		_, err = gortsplib.DialPublish(
@@ -477,7 +480,8 @@ func TestRTSPServerPublisherOverride(t *testing.T) {
 			require.Equal(t, true, ok)
 			defer p.close()
 
-			track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+			track, err := gortsplib.NewTrackH264(96,
+				&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 			require.NoError(t, err)
 
 			s1, err := gortsplib.DialPublish("rtsp://localhost:8554/teststream",
@@ -544,7 +548,8 @@ func TestRTSPServerNonCompliantFrameSize(t *testing.T) {
 		require.Equal(t, true, ok)
 		defer p.close()
 
-		track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+		track, err := gortsplib.NewTrackH264(96,
+			&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 		require.NoError(t, err)
 
 		client := &gortsplib.Client{
@@ -594,7 +599,8 @@ func TestRTSPServerNonCompliantFrameSize(t *testing.T) {
 		require.Equal(t, true, ok)
 		defer p1.close()
 
-		track, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
+		track, err := gortsplib.NewTrackH264(96,
+			&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x01, 0x02, 0x03, 0x04}})
 		require.NoError(t, err)
 
 		client := &gortsplib.Client{
@@ -742,7 +748,8 @@ func TestRTSPServerRunOnDemand(t *testing.T) {
 	doneFile := filepath.Join(os.TempDir(), "ondemand_done")
 	onDemandFile, err := writeTempFile([]byte(fmt.Sprintf(`#!/bin/sh
 trap 'touch %s; [ -z "$(jobs -p)" ] || kill $(jobs -p)' QUIT
-ffmpeg -hide_banner -loglevel error -re -i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH &
+ffmpeg -hide_banner -loglevel error -re `+
+		`-i ../../testimages/ffmpeg/emptyvideo.mkv -c copy -f rtsp rtsp://localhost:$RTSP_PORT/$RTSP_PATH &
 wait
 `, doneFile)))
 	require.NoError(t, err)
diff --git a/internal/core/rtsp_session.go b/internal/core/rtsp_session.go
index 70930acd..4c561810 100644
--- a/internal/core/rtsp_session.go
+++ b/internal/core/rtsp_session.go
@@ -170,7 +170,8 @@ func (s *rtspSession) OnAnnounce(c *rtspConn, ctx *gortsplib.ServerHandlerOnAnno
 }
 
 // OnSetup is called by rtspServer.
-func (s *rtspSession) OnSetup(c *rtspConn, ctx *gortsplib.ServerHandlerOnSetupCtx) (*base.Response, *gortsplib.ServerStream, error) {
+func (s *rtspSession) OnSetup(c *rtspConn, ctx *gortsplib.ServerHandlerOnSetupCtx,
+) (*base.Response, *gortsplib.ServerStream, error) {
 	if ctx.Transport.Protocol == base.StreamProtocolUDP {
 		if _, ok := s.protocols[conf.ProtocolUDP]; !ok {
 			return &base.Response{
diff --git a/internal/core/rtsp_source_test.go b/internal/core/rtsp_source_test.go
index bba79ace..15900b12 100644
--- a/internal/core/rtsp_source_test.go
+++ b/internal/core/rtsp_source_test.go
@@ -21,7 +21,8 @@ type testServer struct {
 	done chan struct{}
 }
 
-func (sh *testServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*base.Response, *gortsplib.ServerStream, error) {
+func (sh *testServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx,
+) (*base.Response, *gortsplib.ServerStream, error) {
 	if sh.authValidator == nil {
 		sh.authValidator = auth.NewValidator(sh.user, sh.pass, nil)
 	}
@@ -36,7 +37,8 @@ func (sh *testServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*ba
 		}, nil, nil
 	}
 
-	track, _ := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x05, 0x06}})
+	track, _ := gortsplib.NewTrackH264(96,
+		&gortsplib.TrackConfigH264{SPS: []byte{0x01, 0x02, 0x03, 0x04}, PPS: []byte{0x05, 0x06}})
 	sh.stream = gortsplib.NewServerStream(gortsplib.Tracks{track})
 
 	return &base.Response{
diff --git a/internal/hls/muxer_test.go b/internal/hls/muxer_test.go
index 51069e87..9e407e66 100644
--- a/internal/hls/muxer_test.go
+++ b/internal/hls/muxer_test.go
@@ -17,10 +17,12 @@ func checkTSPacket(t *testing.T, byts []byte, pid int, afc int) {
 }
 
 func TestMuxer(t *testing.T) {
-	videoTrack, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x07, 0x01, 0x02, 0x03}, PPS: []byte{0x08}})
+	videoTrack, err := gortsplib.NewTrackH264(96,
+		&gortsplib.TrackConfigH264{SPS: []byte{0x07, 0x01, 0x02, 0x03}, PPS: []byte{0x08}})
 	require.NoError(t, err)
 
-	audioTrack, err := gortsplib.NewTrackAAC(97, &gortsplib.TrackConfigAAC{Type: 2, SampleRate: 44100, ChannelCount: 2})
+	audioTrack, err := gortsplib.NewTrackAAC(97,
+		&gortsplib.TrackConfigAAC{Type: 2, SampleRate: 44100, ChannelCount: 2})
 	require.NoError(t, err)
 
 	m, err := NewMuxer(3, 1*time.Second, videoTrack, audioTrack)
@@ -106,10 +108,12 @@ func TestMuxer(t *testing.T) {
 }
 
 func TestMuxerCloseBeforeFirstSegment(t *testing.T) {
-	videoTrack, err := gortsplib.NewTrackH264(96, &gortsplib.TrackConfigH264{SPS: []byte{0x07, 0x01, 0x02, 0x03}, PPS: []byte{0x08}})
+	videoTrack, err := gortsplib.NewTrackH264(96,
+		&gortsplib.TrackConfigH264{SPS: []byte{0x07, 0x01, 0x02, 0x03}, PPS: []byte{0x08}})
 	require.NoError(t, err)
 
-	audioTrack, err := gortsplib.NewTrackAAC(97, &gortsplib.TrackConfigAAC{Type: 2, SampleRate: 44100, ChannelCount: 2})
+	audioTrack, err := gortsplib.NewTrackAAC(97,
+		&gortsplib.TrackConfigAAC{Type: 2, SampleRate: 44100, ChannelCount: 2})
 	require.NoError(t, err)
 
 	m, err := NewMuxer(3, 1*time.Second, videoTrack, audioTrack)