count and log all discarded frames, decode errors, lost packets (#4363)

Discarded frames, decode errors and lost packets were logged
individually, then there was a mechanism that prevented more than 1 log
entry per second from being printed, resulting in inaccurate reports.

Now discarded frames, decode errors and lost packets are accurately
counted, and their count is printed once every second.

go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/alecthomas/kong v1.9.0
 	github.com/asticode/go-astits v1.13.0
 	github.com/bluenviron/gohlslib/v2 v2.1.4-0.20250210133907-d3dddacbb9fc
-	github.com/bluenviron/gortsplib/v4 v4.12.4-0.20250323180412-1b127d70bb33
+	github.com/bluenviron/gortsplib/v4 v4.12.4-0.20250324174248-61372cfa6800
 	github.com/bluenviron/mediacommon/v2 v2.0.1-0.20250324151931-b8ce69d15d3d
 	github.com/datarhei/gosrt v0.9.0
 	github.com/fsnotify/fsnotify v1.8.0

go.sum

@@ -35,8 +35,8 @@ github.com/benburkert/openpgp v0.0.0-20160410205803-c2471f86866c h1:8XZeJrs4+ZYh
 github.com/benburkert/openpgp v0.0.0-20160410205803-c2471f86866c/go.mod h1:x1vxHcL/9AVzuk5HOloOEPrtJY0MaalYr78afXZ+pWI=
 github.com/bluenviron/gohlslib/v2 v2.1.4-0.20250210133907-d3dddacbb9fc h1:t1i9foTQ+RfFT5Ke9HV845zWtz2vtWQCWV8ZXvpzM4g=
 github.com/bluenviron/gohlslib/v2 v2.1.4-0.20250210133907-d3dddacbb9fc/go.mod h1:soTVqoidOT+L08hUSDreM7DebNyjjViUiEvpWlr7EIs=
-github.com/bluenviron/gortsplib/v4 v4.12.4-0.20250323180412-1b127d70bb33 h1:6IJM70YqgIi/txfr2+9r7RHfLOXUhpIFueruqaIsZ64=
+github.com/bluenviron/gortsplib/v4 v4.12.4-0.20250324174248-61372cfa6800 h1:WK8ynLNe5UNxAkB5je95vhwifCWe/GK+ZjW3ybO7rAY=
-github.com/bluenviron/gortsplib/v4 v4.12.4-0.20250323180412-1b127d70bb33/go.mod h1:rEwUB2wda1rjnStH/mMu4SVHTLAAkZBalBp/zDlUbPc=
+github.com/bluenviron/gortsplib/v4 v4.12.4-0.20250324174248-61372cfa6800/go.mod h1:rEwUB2wda1rjnStH/mMu4SVHTLAAkZBalBp/zDlUbPc=
 github.com/bluenviron/mediacommon/v2 v2.0.1-0.20250324151931-b8ce69d15d3d h1:AlIFt4i8ex3cGfoxLS3JoYVzSP4MgL9aMH/rp6kiYN4=
 github.com/bluenviron/mediacommon/v2 v2.0.1-0.20250324151931-b8ce69d15d3d/go.mod h1:iHEz1SFIet6zBwAQoh1a92vTQ3dV3LpVFbom6/SLz3k=
 github.com/bytedance/sonic v1.12.6 h1:/isNmCUF2x3Sh8RAp/4mh4ZGkcFAX/hLrzrK3AvpRzk=

internal/core/path.go

@@ -700,7 +700,7 @@ func (pa *path) setReady(desc *description.Session, allocateEncoder bool) error
 		UDPMaxPayloadSize:  pa.udpMaxPayloadSize,
 		Desc:               desc,
 		GenerateRTPPackets: allocateEncoder,
-		DecodeErrLogger:    logger.NewLimitedLogger(pa.source),
+		Parent:             pa.source,
 	}
 	err := pa.stream.Initialize()
 	if err != nil {

internal/counterdumper/counterdumper.go

@@ -0,0 +1,66 @@
+// Package counterdumper contains a counter that that periodically invokes a callback if the counter is not zero.
+package counterdumper
+
+import (
+	"sync/atomic"
+	"time"
+)
+
+const (
+	callbackPeriod = 1 * time.Second
+)
+
+// CounterDumper is a counter that periodically invokes a callback if the counter is not zero.
+type CounterDumper struct {
+	OnReport func(v uint64)
+
+	counter *uint64
+
+	terminate chan struct{}
+	done      chan struct{}
+}
+
+// Start starts the counter.
+func (c *CounterDumper) Start() {
+	c.counter = new(uint64)
+	c.terminate = make(chan struct{})
+	c.done = make(chan struct{})
+
+	go c.run()
+}
+
+// Stop stops the counter.
+func (c *CounterDumper) Stop() {
+	close(c.terminate)
+	<-c.done
+}
+
+// Increase increases the counter value by 1.
+func (c *CounterDumper) Increase() {
+	atomic.AddUint64(c.counter, 1)
+}
+
+// Add adds value to the counter.
+func (c *CounterDumper) Add(v uint64) {
+	atomic.AddUint64(c.counter, v)
+}
+
+func (c *CounterDumper) run() {
+	defer close(c.done)
+
+	t := time.NewTicker(callbackPeriod)
+	defer t.Stop()
+
+	for {
+		select {
+		case <-c.terminate:
+			return
+
+		case <-t.C:
+			v := atomic.SwapUint64(c.counter, 0)
+			if v != 0 {
+				c.OnReport(v)
+			}
+		}
+	}
+}

internal/counterdumper/counterdumper_test.go

@@ -0,0 +1,42 @@
+package counterdumper
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestCounterDumperReport(t *testing.T) {
+	done := make(chan struct{})
+
+	c := &CounterDumper{
+		OnReport: func(v uint64) {
+			require.Equal(t, uint64(3), v)
+			close(done)
+		},
+	}
+	c.Start()
+	defer c.Stop()
+
+	c.Add(2)
+	c.Increase()
+
+	select {
+	case <-done:
+	case <-time.After(2 * time.Second):
+		t.Errorf("should not happen")
+	}
+}
+
+func TestCounterDumperDoNotReport(t *testing.T) {
+	c := &CounterDumper{
+		OnReport: func(_ uint64) {
+			t.Errorf("should not happen")
+		},
+	}
+	c.Start()
+	defer c.Stop()
+
+	<-time.After(2 * time.Second)
+}

internal/logger/limited_logger.go

@@ -1,34 +0,0 @@
-package logger
-
-import (
-	"sync"
-	"time"
-)
-
-const (
-	minIntervalBetweenWarnings = 1 * time.Second
-)
-
-type limitedLogger struct {
-	w           Writer
-	mutex       sync.Mutex
-	lastPrinted time.Time
-}
-
-// NewLimitedLogger is a wrapper around a Writer that limits printed messages.
-func NewLimitedLogger(w Writer) Writer {
-	return &limitedLogger{
-		w: w,
-	}
-}
-
-// Log is the main logging function.
-func (l *limitedLogger) Log(level Level, format string, args ...interface{}) {
-	now := time.Now()
-	l.mutex.Lock()
-	if now.Sub(l.lastPrinted) >= minIntervalBetweenWarnings {
-		l.lastPrinted = now
-		l.w.Log(level, format, args...)
-	}
-	l.mutex.Unlock()
-}

internal/protocols/hls/from_stream_test.go

@@ -22,7 +22,7 @@ func TestFromStreamNoSupportedCodecs(t *testing.T) {
 			Formats: []format.Format{&format.VP8{}},
 		}}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -56,7 +56,7 @@ func TestFromStreamSkipUnsupportedTracks(t *testing.T) {
 			},
 		}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)

internal/protocols/mpegts/from_stream_test.go

@@ -21,7 +21,7 @@ func TestFromStreamNoSupportedCodecs(t *testing.T) {
 			Formats: []format.Format{&format.VP8{}},
 		}}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -49,7 +49,7 @@ func TestFromStreamSkipUnsupportedTracks(t *testing.T) {
 			},
 		}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)

internal/protocols/rtmp/from_stream_test.go

@@ -24,7 +24,7 @@ func TestFromStreamNoSupportedCodecs(t *testing.T) {
 			Formats: []format.Format{&format.VP8{}},
 		}}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -56,7 +56,7 @@ func TestFromStreamSkipUnsupportedTracks(t *testing.T) {
 			},
 		}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)

internal/protocols/webrtc/from_stream_test.go

@@ -21,7 +21,7 @@ func TestFromStreamNoSupportedCodecs(t *testing.T) {
 			Formats: []format.Format{&format.MJPEG{}},
 		}}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -49,7 +49,7 @@ func TestFromStreamSkipUnsupportedTracks(t *testing.T) {
 			},
 		}},
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -85,7 +85,7 @@ func TestFromStream(t *testing.T) {
 					}},
 				},
 				GenerateRTPPackets: false,
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)

internal/protocols/webrtc/incoming_track.go

@@ -3,12 +3,12 @@ package webrtc
 import (
 	"time"
 
-	"github.com/bluenviron/gortsplib/v4/pkg/liberrors"
 	"github.com/bluenviron/gortsplib/v4/pkg/rtpreorderer"
 	"github.com/pion/rtcp"
 	"github.com/pion/rtp"
 	"github.com/pion/webrtc/v4"
 
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/logger"
 )
 
@@ -242,6 +242,7 @@ type IncomingTrack struct {
 	receiver    *webrtc.RTPReceiver
 	writeRTCP   func([]rtcp.Packet) error
 	log         logger.Writer
+	packetsLost *counterdumper.CounterDumper
 }
 
 func (t *IncomingTrack) initialize() {
@@ -259,6 +260,20 @@ func (*IncomingTrack) PTSEqualsDTS(*rtp.Packet) bool {
 }
 
 func (t *IncomingTrack) start() {
+	t.packetsLost = &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			t.log.Log(logger.Warn, "%d RTP %s lost",
+				val,
+				func() string {
+					if val == 1 {
+						return "packet"
+					}
+					return "packets"
+				}())
+		},
+	}
+	t.packetsLost.Start()
+
 	// read incoming RTCP packets to make interceptors work
 	go func() {
 		buf := make([]byte, 1500)
@@ -301,7 +316,7 @@ func (t *IncomingTrack) start() {
 
 			packets, lost := reorderer.Process(pkt)
 			if lost != 0 {
-				t.log.Log(logger.Warn, (liberrors.ErrClientRTPPacketsLost{Lost: lost}).Error())
+				t.packetsLost.Add(uint64(lost))
 				// do not return
 			}
 
@@ -316,3 +331,9 @@ func (t *IncomingTrack) start() {
 		}
 	}()
 }
+
+func (t *IncomingTrack) stop() {
+	if t.packetsLost != nil {
+		t.packetsLost.Stop()
+	}
+}

internal/protocols/webrtc/peer_connection.go

@@ -325,8 +325,13 @@ func (co *PeerConnection) Start() error {
 
 // Close closes the connection.
 func (co *PeerConnection) Close() {
+	for _, track := range co.incomingTracks {
+		track.stop()
+	}
+
 	co.ctxCancel()
 	co.wr.Close() //nolint:errcheck
+
 	<-co.done
 }
 

internal/recorder/recorder_test.go

@@ -129,7 +129,7 @@ func TestRecorder(t *testing.T) {
 				UDPMaxPayloadSize:  1472,
 				Desc:               desc,
 				GenerateRTPPackets: true,
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)
@@ -343,7 +343,7 @@ func TestRecorderFMP4NegativeDTS(t *testing.T) {
 		UDPMaxPayloadSize:  1472,
 		Desc:               desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -431,7 +431,7 @@ func TestRecorderSkipTracksPartial(t *testing.T) {
 				UDPMaxPayloadSize:  1472,
 				Desc:               desc,
 				GenerateRTPPackets: true,
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)
@@ -492,7 +492,7 @@ func TestRecorderSkipTracksFull(t *testing.T) {
 				UDPMaxPayloadSize:  1472,
 				Desc:               desc,
 				GenerateRTPPackets: true,
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)

internal/servers/hls/server_test.go

@@ -159,7 +159,7 @@ func TestServerRead(t *testing.T) {
 			UDPMaxPayloadSize:  1472,
 			Desc:               desc,
 			GenerateRTPPackets: true,
-			DecodeErrLogger:    test.NilLogger,
+			Parent:             test.NilLogger,
 		}
 		err := strm.Initialize()
 		require.NoError(t, err)
@@ -259,7 +259,7 @@ func TestServerRead(t *testing.T) {
 			UDPMaxPayloadSize:  1472,
 			Desc:               desc,
 			GenerateRTPPackets: true,
-			DecodeErrLogger:    test.NilLogger,
+			Parent:             test.NilLogger,
 		}
 		err := strm.Initialize()
 		require.NoError(t, err)
@@ -364,7 +364,7 @@ func TestDirectory(t *testing.T) {
 		UDPMaxPayloadSize:  1472,
 		Desc:               desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err = strm.Initialize()
 	require.NoError(t, err)

internal/servers/rtmp/server_test.go

@@ -43,7 +43,7 @@ func (p *dummyPath) StartPublisher(req defs.PathStartPublisherReq) (*stream.Stre
 		UDPMaxPayloadSize:  1472,
 		Desc:               req.Desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := p.stream.Initialize()
 	if err != nil {
@@ -200,7 +200,7 @@ func TestServerRead(t *testing.T) {
 				UDPMaxPayloadSize:  1472,
 				Desc:               desc,
 				GenerateRTPPackets: true,
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)

internal/servers/rtsp/server.go

@@ -306,10 +306,10 @@ func (s *Server) OnPause(ctx *gortsplib.ServerHandlerOnPauseCtx) (*base.Response
 	return se.onPause(ctx)
 }
 
-// OnPacketLost implements gortsplib.ServerHandlerOnDecodeError.
+// OnPacketsLost implements gortsplib.ServerHandlerOnPacketsLost.
-func (s *Server) OnPacketLost(ctx *gortsplib.ServerHandlerOnPacketLostCtx) {
+func (s *Server) OnPacketsLost(ctx *gortsplib.ServerHandlerOnPacketsLostCtx) {
 	se := ctx.Session.UserData().(*session)
-	se.onPacketLost(ctx)
+	se.onPacketsLost(ctx)
 }
 
 // OnDecodeError implements gortsplib.ServerHandlerOnDecodeError.

internal/servers/rtsp/server_test.go

@@ -43,7 +43,7 @@ func (p *dummyPath) StartPublisher(req defs.PathStartPublisherReq) (*stream.Stre
 		UDPMaxPayloadSize:  1472,
 		Desc:               req.Desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := p.stream.Initialize()
 	if err != nil {
@@ -152,7 +152,7 @@ func TestServerRead(t *testing.T) {
 		UDPMaxPayloadSize:  1472,
 		Desc:               desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := strm.Initialize()
 	require.NoError(t, err)
@@ -262,7 +262,7 @@ func TestServerRedirect(t *testing.T) {
 				UDPMaxPayloadSize:  1472,
 				Desc:               desc,
 				GenerateRTPPackets: true,
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)

internal/servers/rtsp/session.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/bluenviron/mediamtx/internal/auth"
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/externalcmd"
 	"github.com/bluenviron/mediamtx/internal/hooks"
@@ -42,22 +43,65 @@ type session struct {
 	transport       *gortsplib.Transport
 	pathName        string
 	query           string
-	decodeErrLogger logger.Writer
+	packetsLost     *counterdumper.CounterDumper
-	writeErrLogger  logger.Writer
+	decodeErrors    *counterdumper.CounterDumper
+	discardedFrames *counterdumper.CounterDumper
 }
 
 func (s *session) initialize() {
 	s.uuid = uuid.New()
 	s.created = time.Now()
 
-	s.decodeErrLogger = logger.NewLimitedLogger(s)
+	s.packetsLost = &counterdumper.CounterDumper{
-	s.writeErrLogger = logger.NewLimitedLogger(s)
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%d RTP %s lost",
+				val,
+				func() string {
+					if val == 1 {
+						return "packet"
+					}
+					return "packets"
+				}())
+		},
+	}
+	s.packetsLost.Start()
+
+	s.decodeErrors = &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
+	s.decodeErrors.Start()
+
+	s.discardedFrames = &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "connection is too slow, discarding %d %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "frame"
+					}
+					return "frames"
+				}())
+		},
+	}
+	s.discardedFrames.Start()
 
 	s.Log(logger.Info, "created by %v", s.rconn.NetConn().RemoteAddr())
 }
 
 // Close closes a Session.
 func (s *session) Close() {
+	s.discardedFrames.Stop()
+	s.decodeErrors.Stop()
+	s.packetsLost.Stop()
 	s.rsession.Close()
 }
 
@@ -341,18 +385,19 @@ func (s *session) APISourceDescribe() defs.APIPathSourceOrReader {
 }
 
 // onPacketLost is called by rtspServer.
-func (s *session) onPacketLost(ctx *gortsplib.ServerHandlerOnPacketLostCtx) {
+func (s *session) onPacketsLost(ctx *gortsplib.ServerHandlerOnPacketsLostCtx) {
-	s.decodeErrLogger.Log(logger.Warn, ctx.Error.Error())
+	s.packetsLost.Add(ctx.Lost)
 }
 
 // onDecodeError is called by rtspServer.
-func (s *session) onDecodeError(ctx *gortsplib.ServerHandlerOnDecodeErrorCtx) {
+func (s *session) onDecodeError(_ *gortsplib.ServerHandlerOnDecodeErrorCtx) {
-	s.decodeErrLogger.Log(logger.Warn, ctx.Error.Error())
+	s.decodeErrors.Increase()
 }
 
 // onStreamWriteError is called by rtspServer.
-func (s *session) onStreamWriteError(ctx *gortsplib.ServerHandlerOnStreamWriteErrorCtx) {
+func (s *session) onStreamWriteError(_ *gortsplib.ServerHandlerOnStreamWriteErrorCtx) {
-	s.writeErrLogger.Log(logger.Warn, ctx.Error.Error())
+	// currently the only error returned by OnStreamWriteError is ErrServerWriteQueueFull
+	s.discardedFrames.Increase()
 }
 
 func (s *session) apiItem() *defs.APIRTSPSession {

internal/servers/srt/conn.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/bluenviron/mediamtx/internal/auth"
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/externalcmd"
 	"github.com/bluenviron/mediamtx/internal/hooks"
@@ -207,10 +208,24 @@ func (c *conn) runPublishReader(sconn srt.Conn, path defs.Path) error {
 		return err
 	}
 
-	decodeErrLogger := logger.NewLimitedLogger(c)
+	decodeErrors := &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			c.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
 
-	r.OnDecodeError(func(err error) {
+	decodeErrors.Start()
-		decodeErrLogger.Log(logger.Warn, err.Error())
+	defer decodeErrors.Stop()
+
+	r.OnDecodeError(func(_ error) {
+		decodeErrors.Increase()
 	})
 
 	var stream *stream.Stream

internal/servers/srt/server_test.go

@@ -40,7 +40,7 @@ func (p *dummyPath) StartPublisher(req defs.PathStartPublisherReq) (*stream.Stre
 		UDPMaxPayloadSize:  1472,
 		Desc:               req.Desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := p.stream.Initialize()
 	if err != nil {
@@ -176,7 +176,7 @@ func TestServerRead(t *testing.T) {
 		UDPMaxPayloadSize:  1472,
 		Desc:               desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err = strm.Initialize()
 	require.NoError(t, err)

internal/servers/webrtc/server_test.go

@@ -57,7 +57,7 @@ func (p *dummyPath) StartPublisher(req defs.PathStartPublisherReq) (*stream.Stre
 		UDPMaxPayloadSize:  1472,
 		Desc:               req.Desc,
 		GenerateRTPPackets: true,
-		DecodeErrLogger:    test.NilLogger,
+		Parent:             test.NilLogger,
 	}
 	err := p.stream.Initialize()
 	if err != nil {
@@ -511,7 +511,7 @@ func TestServerRead(t *testing.T) {
 				UDPMaxPayloadSize:  1472,
 				Desc:               desc,
 				GenerateRTPPackets: reflect.TypeOf(ca.unit) != reflect.TypeOf(&unit.Generic{}),
-				DecodeErrLogger:    test.NilLogger,
+				Parent:             test.NilLogger,
 			}
 			err := strm.Initialize()
 			require.NoError(t, err)

internal/staticsources/hls/source.go

@@ -9,6 +9,7 @@ import (
 	"github.com/bluenviron/gortsplib/v4/pkg/description"
 
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/protocols/hls"
@@ -37,7 +38,21 @@ func (s *Source) Run(params defs.StaticSourceRunParams) error {
 		}
 	}()
 
-	decodeErrLogger := logger.NewLimitedLogger(s)
+	decodeErrors := &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
+
+	decodeErrors.Start()
+	defer decodeErrors.Stop()
 
 	tr := &http.Transport{
 		TLSClientConfig: tls.ConfigForFingerprint(params.Conf.SourceFingerprint),
@@ -63,8 +78,8 @@ func (s *Source) Run(params defs.StaticSourceRunParams) error {
 		OnDownloadPart: func(u string) {
 			s.Log(logger.Debug, "downloading part %v", u)
 		},
-		OnDecodeError: func(err error) {
+		OnDecodeError: func(_ error) {
-			decodeErrLogger.Log(logger.Warn, err.Error())
+			decodeErrors.Increase()
 		},
 		OnTracks: func(tracks []*gohlslib.Track) error {
 			medias, err := hls.ToStream(c, tracks, &stream)

internal/staticsources/rtsp/source.go

@@ -10,6 +10,7 @@ import (
 	"github.com/pion/rtp"
 
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/protocols/tls"
@@ -77,7 +78,37 @@ func (s *Source) Log(level logger.Level, format string, args ...interface{}) {
 func (s *Source) Run(params defs.StaticSourceRunParams) error {
 	s.Log(logger.Debug, "connecting")
 
-	decodeErrLogger := logger.NewLimitedLogger(s)
+	packetsLost := &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%d RTP %s lost",
+				val,
+				func() string {
+					if val == 1 {
+						return "packet"
+					}
+					return "packets"
+				}())
+		},
+	}
+
+	packetsLost.Start()
+	defer packetsLost.Stop()
+
+	decodeErrors := &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
+
+	decodeErrors.Start()
+	defer decodeErrors.Stop()
 
 	c := &gortsplib.Client{
 		Transport:      params.Conf.RTSPTransport.Transport,
@@ -95,11 +126,11 @@ func (s *Source) Run(params defs.StaticSourceRunParams) error {
 		OnTransportSwitch: func(err error) {
 			s.Log(logger.Warn, err.Error())
 		},
-		OnPacketLost: func(err error) {
+		OnPacketsLost: func(lost uint64) {
-			decodeErrLogger.Log(logger.Warn, err.Error())
+			packetsLost.Add(lost)
 		},
-		OnDecodeError: func(err error) {
+		OnDecodeError: func(_ error) {
-			decodeErrLogger.Log(logger.Warn, err.Error())
+			decodeErrors.Increase()
 		},
 	}
 

internal/staticsources/srt/source.go

@@ -9,6 +9,7 @@ import (
 	srt "github.com/datarhei/gosrt"
 
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/protocols/mpegts"
@@ -75,10 +76,24 @@ func (s *Source) runReader(sconn srt.Conn) error {
 		return err
 	}
 
-	decodeErrLogger := logger.NewLimitedLogger(s)
+	decodeErrors := &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
 
-	r.OnDecodeError(func(err error) {
+	decodeErrors.Start()
-		decodeErrLogger.Log(logger.Warn, err.Error())
+	defer decodeErrors.Stop()
+
+	r.OnDecodeError(func(_ error) {
+		decodeErrors.Increase()
 	})
 
 	var stream *stream.Stream

internal/staticsources/udp/source.go

@@ -11,6 +11,7 @@ import (
 	mcmpegts "github.com/bluenviron/mediacommon/v2/pkg/formats/mpegts"
 
 	"github.com/bluenviron/mediamtx/internal/conf"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/defs"
 	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/protocols/mpegts"
@@ -112,10 +113,24 @@ func (s *Source) runReader(pc net.PacketConn) error {
 		return err
 	}
 
-	decodeErrLogger := logger.NewLimitedLogger(s)
+	decodeErrors := &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
 
-	r.OnDecodeError(func(err error) {
+	decodeErrors.Start()
-		decodeErrLogger.Log(logger.Warn, err.Error())
+	defer decodeErrors.Stop()
+
+	r.OnDecodeError(func(_ error) {
+		decodeErrors.Increase()
 	})
 
 	var stream *stream.Stream

internal/stream/stream.go

@@ -11,6 +11,7 @@ import (
 	"github.com/bluenviron/gortsplib/v4/pkg/format"
 	"github.com/pion/rtp"
 
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/unit"
 )
@@ -30,7 +31,7 @@ type Stream struct {
 	UDPMaxPayloadSize  int
 	Desc               *description.Session
 	GenerateRTPPackets bool
-	DecodeErrLogger    logger.Writer
+	Parent             logger.Writer
 
 	bytesReceived *uint64
 	bytesSent     *uint64
@@ -39,6 +40,7 @@ type Stream struct {
 	rtspStream    *gortsplib.ServerStream
 	rtspsStream   *gortsplib.ServerStream
 	streamReaders map[Reader]*streamReader
+	decodeErrors  *counterdumper.CounterDumper
 
 	readerRunning chan struct{}
 }
@@ -51,12 +53,25 @@ func (s *Stream) Initialize() error {
 	s.streamReaders = make(map[Reader]*streamReader)
 	s.readerRunning = make(chan struct{})
 
+	s.decodeErrors = &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			s.Parent.Log(logger.Warn, "%s decode %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "error"
+					}
+					return "errors"
+				}())
+		},
+	}
+
 	for _, media := range s.Desc.Medias {
 		s.streamMedias[media] = &streamMedia{
 			UDPMaxPayloadSize:  s.UDPMaxPayloadSize,
 			Media:              media,
 			GenerateRTPPackets: s.GenerateRTPPackets,
-			DecodeErrLogger:    s.DecodeErrLogger,
+			DecodeErrors:       s.decodeErrors,
 		}
 		err := s.streamMedias[media].initialize()
 		if err != nil {

internal/stream/stream_format.go

@@ -8,8 +8,8 @@ import (
 	"github.com/bluenviron/gortsplib/v4/pkg/format"
 	"github.com/pion/rtp"
 
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/formatprocessor"
-	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/unit"
 )
 
@@ -22,10 +22,10 @@ func unitSize(u unit.Unit) uint64 {
 }
 
 type streamFormat struct {
-	udpMaxPayloadSize  int
+	UDPMaxPayloadSize  int
-	format             format.Format
+	Format             format.Format
-	generateRTPPackets bool
+	GenerateRTPPackets bool
-	decodeErrLogger    logger.Writer
+	DecodeErrors       *counterdumper.CounterDumper
 
 	proc           formatprocessor.Processor
 	pausedReaders  map[*streamReader]ReadFunc
@@ -37,7 +37,7 @@ func (sf *streamFormat) initialize() error {
 	sf.runningReaders = make(map[*streamReader]ReadFunc)
 
 	var err error
-	sf.proc, err = formatprocessor.New(sf.udpMaxPayloadSize, sf.format, sf.generateRTPPackets)
+	sf.proc, err = formatprocessor.New(sf.UDPMaxPayloadSize, sf.Format, sf.GenerateRTPPackets)
 	if err != nil {
 		return err
 	}
@@ -64,7 +64,7 @@ func (sf *streamFormat) startReader(sr *streamReader) {
 func (sf *streamFormat) writeUnit(s *Stream, medi *description.Media, u unit.Unit) {
 	err := sf.proc.ProcessUnit(u)
 	if err != nil {
-		sf.decodeErrLogger.Log(logger.Warn, err.Error())
+		sf.DecodeErrors.Increase()
 		return
 	}
 
@@ -82,7 +82,7 @@ func (sf *streamFormat) writeRTPPacket(
 
 	u, err := sf.proc.ProcessRTPPacket(pkt, ntp, pts, hasNonRTSPReaders)
 	if err != nil {
-		sf.decodeErrLogger.Log(logger.Warn, err.Error())
+		sf.DecodeErrors.Increase()
 		return
 	}
 

internal/stream/stream_media.go

@@ -3,15 +3,14 @@ package stream
 import (
 	"github.com/bluenviron/gortsplib/v4/pkg/description"
 	"github.com/bluenviron/gortsplib/v4/pkg/format"
-
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
-	"github.com/bluenviron/mediamtx/internal/logger"
 )
 
 type streamMedia struct {
 	UDPMaxPayloadSize  int
 	Media              *description.Media
 	GenerateRTPPackets bool
-	DecodeErrLogger    logger.Writer
+	DecodeErrors       *counterdumper.CounterDumper
 
 	formats map[format.Format]*streamFormat
 }
@@ -21,10 +20,10 @@ func (sm *streamMedia) initialize() error {
 
 	for _, forma := range sm.Media.Formats {
 		sf := &streamFormat{
-			udpMaxPayloadSize:  sm.UDPMaxPayloadSize,
+			UDPMaxPayloadSize:  sm.UDPMaxPayloadSize,
-			format:             forma,
+			Format:             forma,
-			generateRTPPackets: sm.GenerateRTPPackets,
+			GenerateRTPPackets: sm.GenerateRTPPackets,
-			decodeErrLogger:    sm.DecodeErrLogger,
+			DecodeErrors:       sm.DecodeErrors,
 		}
 		err := sf.initialize()
 		if err != nil {

internal/stream/stream_reader.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"github.com/bluenviron/gortsplib/v4/pkg/ringbuffer"
+	"github.com/bluenviron/mediamtx/internal/counterdumper"
 	"github.com/bluenviron/mediamtx/internal/logger"
 )
 
@@ -11,16 +12,15 @@ type streamReader struct {
 	queueSize int
 	parent    logger.Writer
 
-	writeErrLogger logger.Writer
 	buffer          *ringbuffer.RingBuffer
 	started         bool
+	discardedFrames *counterdumper.CounterDumper
 
 	// out
 	err chan error
 }
 
 func (w *streamReader) initialize() {
-	w.writeErrLogger = logger.NewLimitedLogger(w.parent)
 	buffer, _ := ringbuffer.New(uint64(w.queueSize))
 	w.buffer = buffer
 	w.err = make(chan error)
@@ -28,12 +28,29 @@ func (w *streamReader) initialize() {
 
 func (w *streamReader) start() {
 	w.started = true
+
+	w.discardedFrames = &counterdumper.CounterDumper{
+		OnReport: func(val uint64) {
+			w.parent.Log(logger.Warn, "connection is too slow, discarding %d %s",
+				val,
+				func() string {
+					if val == 1 {
+						return "frame"
+					}
+					return "frames"
+				}())
+		},
+	}
+	w.discardedFrames.Start()
+
 	go w.run()
 }
 
 func (w *streamReader) stop() {
 	w.buffer.Close()
+
 	if w.started {
+		w.discardedFrames.Stop()
 		<-w.err
 	}
 }
@@ -64,6 +81,6 @@ func (w *streamReader) runInner() error {
 func (w *streamReader) push(cb func() error) {
 	ok := w.buffer.Push(cb)
 	if !ok {
-		w.writeErrLogger.Log(logger.Warn, "write queue is full")
+		w.discardedFrames.Increase()
 	}
 }

internal/test/source_tester.go

@@ -69,7 +69,7 @@ func (t *SourceTester) SetReady(req defs.PathSourceStaticSetReadyReq) defs.PathS
 		UDPMaxPayloadSize:  1472,
 		Desc:               req.Desc,
 		GenerateRTPPackets: req.GenerateRTPPackets,
-		DecodeErrLogger:    t,
+		Parent:             t,
 	}
 	err := t.stream.Initialize()
 	if err != nil {