warn users about skipped tracks when reading or publishing

go.mod

@@ -8,9 +8,10 @@ require (
 	github.com/MicahParks/keyfunc/v3 v3.3.3
 	github.com/abema/go-mp4 v1.2.0
 	github.com/alecthomas/kong v1.2.1
+	github.com/asticode/go-astits v1.13.0
 	github.com/bluenviron/gohlslib v1.4.0
 	github.com/bluenviron/gortsplib/v4 v4.10.4
-	github.com/bluenviron/mediacommon v1.12.3
+	github.com/bluenviron/mediacommon v1.12.4-0.20240909171423-2f5c038aff08
 	github.com/datarhei/gosrt v0.7.0
 	github.com/fsnotify/fsnotify v1.7.0
 	github.com/gin-gonic/gin v1.10.0
@@ -36,7 +37,6 @@ require (
 
 require (
 	github.com/asticode/go-astikit v0.30.0 // indirect
-	github.com/asticode/go-astits v1.13.0 // indirect
 	github.com/benburkert/openpgp v0.0.0-20160410205803-c2471f86866c // indirect
 	github.com/bytedance/sonic v1.11.6 // indirect
 	github.com/bytedance/sonic/loader v0.1.1 // indirect

go.sum

@@ -24,8 +24,8 @@ github.com/bluenviron/gohlslib v1.4.0 h1:3a9W1x8eqlxJUKt1sJCunPGtti5ALIY2ik4GU0R
 github.com/bluenviron/gohlslib v1.4.0/go.mod h1:q5ZElzNw5GRbV1VEI45qkcPbKBco6BP58QEY5HyFsmo=
 github.com/bluenviron/gortsplib/v4 v4.10.4 h1:7fDGKRfb7q3Foab6ctfU45BNd8q3G/ln2wwMlhcoyz8=
 github.com/bluenviron/gortsplib/v4 v4.10.4/go.mod h1:BsTItHGBtHOPmj3D6AygXaAMXx4+LQlJWNfDAI5PNkg=
-github.com/bluenviron/mediacommon v1.12.3 h1:a7O1CzfdWsLJmTLe365KfRoAGeVxJPB/aDaCW4Jm2+U=
-github.com/bluenviron/mediacommon v1.12.3/go.mod h1:HDyW2CzjvhYJXtdxstdFPio3G0qSocPhqkhUt/qffec=
+github.com/bluenviron/mediacommon v1.12.4-0.20240909171423-2f5c038aff08 h1:8eI9UTEBmq5PSSwCO5fI78kujvGtLPsHApWG9MeDhgg=
+github.com/bluenviron/mediacommon v1.12.4-0.20240909171423-2f5c038aff08/go.mod h1:HDyW2CzjvhYJXtdxstdFPio3G0qSocPhqkhUt/qffec=
 github.com/bytedance/sonic v1.11.6 h1:oUp34TzMlL+OY1OUWxHqsdkgC/Zfc85zGqw9siXjrc0=
 github.com/bytedance/sonic v1.11.6/go.mod h1:LysEHSvpvDySVdC2f87zGWf6CIKJcAvqab1ZaiQtds4=
 github.com/bytedance/sonic/loader v0.1.1 h1:c+e5Pt1k/cy5wMveRDyk2X4B9hF4g7an8N3zCYjJFNM=

internal/protocols/hls/from_stream.go

@@ -16,13 +16,13 @@ import (
 
 // ErrNoSupportedCodecs is returned by FromStream when there are no supported codecs.
 var ErrNoSupportedCodecs = errors.New(
-	"the stream doesn't contain any supported codec, which are currently H265, H264, Opus, MPEG-4 Audio")
+	"the stream doesn't contain any supported codec, which are currently AV1, VP9, H265, H264, Opus, MPEG-4 Audio")
 
 func setupVideoTrack(
 	stream *stream.Stream,
 	writer *asyncwriter.Writer,
 	muxer *gohlslib.Muxer,
-) *gohlslib.Track {
+) format.Format {
 	var videoFormatAV1 *format.AV1
 	videoMedia := stream.Desc().FindFormat(&videoFormatAV1)
 
@@ -42,9 +42,10 @@ func setupVideoTrack(
 			return nil
 		})
 
-		return &gohlslib.Track{
+		muxer.VideoTrack = &gohlslib.Track{
 			Codec: &codecs.AV1{},
 		}
+		return videoFormatAV1
 	}
 
 	var videoFormatVP9 *format.VP9
@@ -66,9 +67,10 @@ func setupVideoTrack(
 			return nil
 		})
 
-		return &gohlslib.Track{
+		muxer.VideoTrack = &gohlslib.Track{
 			Codec: &codecs.VP9{},
 		}
+		return videoFormatVP9
 	}
 
 	var videoFormatH265 *format.H265
@@ -92,13 +94,14 @@ func setupVideoTrack(
 
 		vps, sps, pps := videoFormatH265.SafeParams()
 
-		return &gohlslib.Track{
+		muxer.VideoTrack = &gohlslib.Track{
 			Codec: &codecs.H265{
 				VPS: vps,
 				SPS: sps,
 				PPS: pps,
 			},
 		}
+		return videoFormatH265
 	}
 
 	var videoFormatH264 *format.H264
@@ -122,12 +125,13 @@ func setupVideoTrack(
 
 		sps, pps := videoFormatH264.SafeParams()
 
-		return &gohlslib.Track{
+		muxer.VideoTrack = &gohlslib.Track{
 			Codec: &codecs.H264{
 				SPS: sps,
 				PPS: pps,
 			},
 		}
+		return videoFormatH264
 	}
 
 	return nil
@@ -138,11 +142,11 @@ func setupAudioTrack(
 	writer *asyncwriter.Writer,
 	muxer *gohlslib.Muxer,
 	l logger.Writer,
-) *gohlslib.Track {
+) format.Format {
 	var audioFormatOpus *format.Opus
 	audioMedia := stream.Desc().FindFormat(&audioFormatOpus)
 
-	if audioMedia != nil {
+	if audioFormatOpus != nil {
 		stream.AddReader(writer, audioMedia, audioFormatOpus, func(u unit.Unit) error {
 			tunit := u.(*unit.Opus)
 
@@ -157,17 +161,18 @@ func setupAudioTrack(
 			return nil
 		})
 
-		return &gohlslib.Track{
+		muxer.AudioTrack = &gohlslib.Track{
 			Codec: &codecs.Opus{
 				ChannelCount: audioFormatOpus.ChannelCount,
 			},
 		}
+		return audioFormatOpus
 	}
 
 	var audioFormatMPEG4Audio *format.MPEG4Audio
 	audioMedia = stream.Desc().FindFormat(&audioFormatMPEG4Audio)
 
-	if audioMedia != nil {
+	if audioFormatMPEG4Audio != nil {
 		co := audioFormatMPEG4Audio.GetConfig()
 		if co == nil {
 			l.Log(logger.Warn, "skipping MPEG-4 audio track: tracks without explicit configuration are not supported")
@@ -190,11 +195,12 @@ func setupAudioTrack(
 				return nil
 			})
 
-			return &gohlslib.Track{
+			muxer.AudioTrack = &gohlslib.Track{
 				Codec: &codecs.MPEG4Audio{
 					Config: *co,
 				},
 			}
+			return audioFormatMPEG4Audio
 		}
 	}
 
@@ -208,25 +214,30 @@ func FromStream(
 	muxer *gohlslib.Muxer,
 	l logger.Writer,
 ) error {
-	videoTrack := setupVideoTrack(
+	videoFormat := setupVideoTrack(
 		stream,
 		writer,
 		muxer,
 	)
 
-	audioTrack := setupAudioTrack(
+	audioFormat := setupAudioTrack(
 		stream,
 		writer,
 		muxer,
 		l,
 	)
 
-	if videoTrack == nil && audioTrack == nil {
+	if videoFormat == nil && audioFormat == nil {
 		return ErrNoSupportedCodecs
 	}
 
-	muxer.VideoTrack = videoTrack
-	muxer.AudioTrack = audioTrack
+	for _, media := range stream.Desc().Medias {
+		for _, forma := range media.Formats {
+			if forma != videoFormat && forma != audioFormat {
+				l.Log(logger.Warn, "skipping track with codec %s", forma.Codec())
+			}
+		}
+	}
 
 	return nil
 }

internal/protocols/hls/from_stream_test.go

@@ -0,0 +1,81 @@
+package hls
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/bluenviron/gohlslib"
+	"github.com/bluenviron/gortsplib/v4/pkg/description"
+	"github.com/bluenviron/gortsplib/v4/pkg/format"
+	"github.com/bluenviron/mediamtx/internal/asyncwriter"
+	"github.com/bluenviron/mediamtx/internal/logger"
+	"github.com/bluenviron/mediamtx/internal/stream"
+	"github.com/bluenviron/mediamtx/internal/test"
+	"github.com/stretchr/testify/require"
+)
+
+func TestFromStreamNoSupportedCodecs(t *testing.T) {
+	stream, err := stream.New(
+		1460,
+		&description.Session{Medias: []*description.Media{{
+			Type:    description.MediaTypeVideo,
+			Formats: []format.Format{&format.VP8{}},
+		}}},
+		true,
+		test.NilLogger,
+	)
+	require.NoError(t, err)
+
+	writer := asyncwriter.New(0, nil)
+
+	l := test.Logger(func(logger.Level, string, ...interface{}) {
+		t.Error("should not happen")
+	})
+
+	err = FromStream(stream, writer, nil, l)
+	require.Equal(t, ErrNoSupportedCodecs, err)
+}
+
+func TestFromStreamSkipUnsupportedTracks(t *testing.T) {
+	stream, err := stream.New(
+		1460,
+		&description.Session{Medias: []*description.Media{
+			{
+				Type:    description.MediaTypeVideo,
+				Formats: []format.Format{&format.VP9{}},
+			},
+			{
+				Type:    description.MediaTypeVideo,
+				Formats: []format.Format{&format.VP8{}},
+			},
+			{
+				Type:    description.MediaTypeAudio,
+				Formats: []format.Format{&format.MPEG1Audio{}},
+			},
+		}},
+		true,
+		test.NilLogger,
+	)
+	require.NoError(t, err)
+
+	writer := asyncwriter.New(0, nil)
+
+	m := &gohlslib.Muxer{}
+
+	n := 0
+
+	l := test.Logger(func(l logger.Level, format string, args ...interface{}) {
+		require.Equal(t, logger.Warn, l)
+		switch n {
+		case 0:
+			require.Equal(t, "skipping track with codec VP8", fmt.Sprintf(format, args...))
+		case 1:
+			require.Equal(t, "skipping track with codec MPEG-1/2 Audio", fmt.Sprintf(format, args...))
+		}
+		n++
+	})
+
+	err = FromStream(stream, writer, m, l)
+	require.NoError(t, err)
+	require.Equal(t, 2, n)
+}

internal/protocols/hls/to_stream.go

@@ -1,7 +1,6 @@
 package hls
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/bluenviron/gohlslib"
@@ -144,11 +143,15 @@ func ToStream(
 			})
 
 		default:
-			return nil, fmt.Errorf("unsupported track: %T", track.Codec)
+			panic("should not happen")
 		}
 
 		medias = append(medias, medi)
 	}
 
+	if len(medias) == 0 {
+		return nil, ErrNoSupportedCodecs
+	}
+
 	return medias, nil
 }

internal/protocols/hls/to_stream_test.go

@@ -0,0 +1,16 @@
+package hls
+
+import (
+	"testing"
+
+	"github.com/bluenviron/gohlslib"
+	"github.com/stretchr/testify/require"
+)
+
+func TestToStreamNoSupportedCodecs(t *testing.T) {
+	_, err := ToStream(nil, []*gohlslib.Track{}, nil)
+	require.Equal(t, ErrNoSupportedCodecs, err)
+}
+
+// this is impossible to test since currently we support all gohlslib.Tracks.
+// func TestToStreamSkipUnsupportedTracks(t *testing.T)

internal/protocols/mpegts/from_stream.go

@@ -13,6 +13,7 @@ import (
 	srt "github.com/datarhei/gosrt"
 
 	"github.com/bluenviron/mediamtx/internal/asyncwriter"
+	"github.com/bluenviron/mediamtx/internal/logger"
 	"github.com/bluenviron/mediamtx/internal/stream"
 	"github.com/bluenviron/mediamtx/internal/unit"
 )
@@ -28,9 +29,11 @@ func FromStream(
 	bw *bufio.Writer,
 	sconn srt.Conn,
 	writeTimeout time.Duration,
+	l logger.Writer,
 ) error {
 	var w *mcmpegts.Writer
 	var tracks []*mcmpegts.Track
+	var skippedFormats []format.Format
 
 	addTrack := func(codec mcmpegts.Codec) *mcmpegts.Track {
 		track := &mcmpegts.Track{
@@ -246,12 +249,19 @@ func FromStream(
 					}
 					return bw.Flush()
 				})
+
+			default:
+				skippedFormats = append(skippedFormats, forma)
 			}
 		}
 	}
 
 	if len(tracks) == 0 {
-		return ErrNoTracks
+		return errNoSupportedCodecs
+	}
+
+	for _, forma := range skippedFormats {
+		l.Log(logger.Warn, "skipping track with codec %s", forma.Codec())
 	}
 
 	w = mcmpegts.NewWriter(bw, tracks)