Update version to 1.4.0

Fix CORS for Basic auth

.github/workflows/docker.yml

@@ -52,7 +52,7 @@ jobs:
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Build and push
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           platforms: |
@@ -63,9 +63,10 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
       - name: Build and push Hardware
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: hardware.Dockerfile
@@ -73,3 +74,5 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta-hw.outputs.tags }}
           labels: ${{ steps.meta-hw.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/gh-pages.yml

@@ -34,4 +34,4 @@ jobs:
           path: './website'
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v2

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.19'
+          go-version: '1.20'
 
       - name: Build Go binary
         run: go build -ldflags "-s -w" -trimpath -o ./go2rtc
@@ -76,7 +76,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
       - name: Build and push
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           platforms: linux/${{ matrix.platform }}
@@ -89,7 +89,7 @@ jobs:
 
       - name: Build and push Hardware
         if: matrix.platform == 'amd64'
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: hardware.Dockerfile

Dockerfile

@@ -2,7 +2,7 @@
 
 # 0. Prepare images
 ARG PYTHON_VERSION="3.11"
-ARG GO_VERSION="1.19"
+ARG GO_VERSION="1.20"
 ARG NGROK_VERSION="3"
 
 FROM python:${PYTHON_VERSION}-alpine AS base

cmd/api/api.go

@@ -121,6 +121,7 @@ func middlewareCORS(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Access-Control-Allow-Origin", "*")
 		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		w.Header().Set("Access-Control-Allow-Headers", "Authorization")
 		next.ServeHTTP(w, r)
 	})
 }

cmd/app/app.go

@@ -16,7 +16,7 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
-var Version = "1.3.1"
+var Version = "1.4.0"
 var UserAgent = "go2rtc/" + Version
 
 var ConfigPath string

cmd/ffmpeg/device/device_linux.go

@@ -12,8 +12,10 @@ import (
 const deviceInputPrefix = "-f v4l2"
 
 func deviceInputSuffix(videoIdx, audioIdx int) string {
-	video := findMedia(core.KindVideo, videoIdx)
+	if video := findMedia(core.KindVideo, videoIdx); video != nil {
-	return video.ID
+		return video.ID
+	}
+	return ""
 }
 
 func loadMedias() {

cmd/ffmpeg/ffmpeg.go

@@ -51,7 +51,7 @@ var defaults = map[string]string{
 	"rtsp/udp": "-fflags nobuffer -flags low_delay -timeout 5000000 -user_agent go2rtc/ffmpeg -i {input}",
 
 	// output
-	"output": "-user_agent ffmpeg/go2rtc -rtsp_transport tcp -f rtsp {output}",
+	"output": "-user_agent ffmpeg/go2rtc -rtsp_transport tcp -bufsize 8192k -f rtsp {output}",
 
 	// `-preset superfast` - we can't use ultrafast because it doesn't support `-profile main -level 4.1`
 	// `-tune zerolatency` - for minimal latency
@@ -60,7 +60,8 @@ var defaults = map[string]string{
 	"h265":  "-c:v libx265 -g 50 -profile:v high -level:v 5.1 -preset:v superfast -tune:v zerolatency",
 	"mjpeg": "-c:v mjpeg -force_duplicated_matrix:v 1 -huffman:v 0 -pix_fmt:v yuvj420p",
 
-	"opus":       "-c:a libopus -ar:a 48000 -ac:a 2",
+	// https://ffmpeg.org/ffmpeg-codecs.html#libopus-1
+	"opus":       "-c:a libopus -ar:a 48000 -ac:a 2 -application:a voip -compression_level:a 0",
 	"pcmu":       "-c:a pcm_mulaw -ar:a 8000 -ac:a 1",
 	"pcmu/16000": "-c:a pcm_mulaw -ar:a 16000 -ac:a 1",
 	"pcmu/48000": "-c:a pcm_mulaw -ar:a 48000 -ac:a 1",
@@ -70,8 +71,7 @@ var defaults = map[string]string{
 	"aac":        "-c:a aac", // keep sample rate and channels
 	"aac/16000":  "-c:a aac -ar:a 16000 -ac:a 1",
 	"mp3":        "-c:a libmp3lame -q:a 8",
-	"pcm":        "-c:a pcm_s16be",
+	"pcm":        "-c:a pcm_s16be -ar:a 8000 -ac:a 1",
-	"pcm/8000":   "-c:a pcm_s16be -ar:a 8000 -ac:a 1",
 	"pcm/16000":  "-c:a pcm_s16be -ar:a 16000 -ac:a 1",
 	"pcm/48000":  "-c:a pcm_s16be -ar:a 48000 -ac:a 1",
 

cmd/hass/api.go

@@ -8,7 +8,6 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/webrtc"
 	"net"
 	"net/http"
-	"net/url"
 	"strings"
 )
 
@@ -25,6 +24,7 @@ func initAPI() {
 
 	api.HandleFunc("/streams", ok)
 
+	// api from RTSPtoWeb
 	api.HandleFunc("/stream/", func(w http.ResponseWriter, r *http.Request) {
 		switch {
 		// /stream/{id}/add
@@ -40,13 +40,7 @@ func initAPI() {
 			// 3. dynamic link to Hass camera
 			stream := streams.Get(v.Name)
 			if stream == nil {
-				// check if it is rtsp link to go2rtc
+				stream = streams.NewTemplate(v.Name, v.Channels.First.Url)
-				stream = rtspStream(v.Channels.First.Url)
-				if stream != nil {
-					streams.New(v.Name, stream)
-				} else {
-					stream = streams.New(v.Name, "{input}")
-				}
 			}
 
 			stream.SetSource(v.Channels.First.Url)
@@ -90,48 +84,6 @@ func initAPI() {
 			_, _ = w.Write([]byte(s))
 		}
 	})
-
-	// api from RTSPtoWebRTC
-	api.HandleFunc("/stream", func(w http.ResponseWriter, r *http.Request) {
-		if err := r.ParseForm(); err != nil {
-			return
-		}
-
-		str := r.FormValue("sdp64")
-		offer, err := base64.StdEncoding.DecodeString(str)
-		if err != nil {
-			return
-		}
-
-		src := r.FormValue("url")
-		src, err = url.QueryUnescape(src)
-		if err != nil {
-			return
-		}
-
-		stream := streams.Get(src)
-		if stream == nil {
-			if stream = rtspStream(src); stream != nil {
-				streams.New(src, stream)
-			} else {
-				stream = streams.New(src, src)
-			}
-		}
-
-		str, err = webrtc.ExchangeSDP(stream, string(offer), "WebRTC/Hass sync", r.UserAgent())
-		if err != nil {
-			return
-		}
-
-		v := struct {
-			Answer string `json:"sdp64"`
-		}{
-			Answer: base64.StdEncoding.EncodeToString([]byte(str)),
-		}
-
-		w.Header().Set("Content-Type", "application/json")
-		_ = json.NewEncoder(w).Encode(v)
-	})
 }
 
 func HassioAddr() string {
@@ -153,15 +105,6 @@ func HassioAddr() string {
 	return ""
 }
 
-func rtspStream(url string) *streams.Stream {
-	if strings.HasPrefix(url, "rtsp://") {
-		if i := strings.IndexByte(url[7:], '/'); i > 0 {
-			return streams.Get(url[8+i:])
-		}
-	}
-	return nil
-}
-
 type addJSON struct {
 	Name     string `json:"name"`
 	Channels struct {

cmd/hls/hls.go

@@ -10,7 +10,7 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"github.com/rs/zerolog/log"
 	"net/http"
-	"strconv"
+	"strings"
 	"sync"
 	"time"
 )
@@ -29,6 +29,7 @@ func Init() {
 
 type Consumer interface {
 	core.Consumer
+	Listen(f core.EventFunc)
 	Init() ([]byte, error)
 	MimeCodecs() string
 	Start()
@@ -48,6 +49,9 @@ const keepalive = 5 * time.Second
 
 var sessions = map[string]*Session{}
 
+// once I saw 404 on MP4 segment, so better to use mutex
+var sessionsMu sync.RWMutex
+
 func handlerStream(w http.ResponseWriter, r *http.Request) {
 	// CORS important for Chromecast
 	w.Header().Set("Access-Control-Allow-Origin", "*")
@@ -84,7 +88,7 @@ func handlerStream(w http.ResponseWriter, r *http.Request) {
 
 	session := &Session{cons: cons}
 
-	cons.(any).(*core.Listener).Listen(func(msg any) {
+	cons.Listen(func(msg any) {
 		if data, ok := msg.([]byte); ok {
 			session.mu.Lock()
 			session.segment = append(session.segment, data...)
@@ -104,7 +108,7 @@ func handlerStream(w http.ResponseWriter, r *http.Request) {
 
 	cons.Start()
 
-	sid := strconv.FormatInt(time.Now().UnixNano(), 10)
+	sid := core.RandString(8, 62)
 
 	// two segments important for Chromecast
 	if medias != nil {
@@ -128,11 +132,16 @@ segment.ts?id=` + sid + `&n=%d
 segment.ts?id=` + sid + `&n=%d`
 	}
 
+	sessionsMu.Lock()
 	sessions[sid] = session
+	sessionsMu.Unlock()
+
+	// Apple Safari can play FLAC codec, but fail it it in m3u8 playlist
+	codecs := strings.Replace(cons.MimeCodecs(), mp4.MimeFlac, mp4.MimeAAC, 1)
 
 	// bandwidth important for Safari, codecs useful for smooth playback
 	data := []byte(`#EXTM3U
-#EXT-X-STREAM-INF:BANDWIDTH=1000000,CODECS="` + cons.MimeCodecs() + `"
+#EXT-X-STREAM-INF:BANDWIDTH=1000000,CODECS="` + codecs + `"
 hls/playlist.m3u8?id=` + sid)
 
 	if _, err := w.Write(data); err != nil {
@@ -150,7 +159,9 @@ func handlerPlaylist(w http.ResponseWriter, r *http.Request) {
 	}
 
 	sid := r.URL.Query().Get("id")
+	sessionsMu.RLock()
 	session := sessions[sid]
+	sessionsMu.RUnlock()
 	if session == nil {
 		http.NotFound(w, r)
 		return
@@ -173,7 +184,9 @@ func handlerSegmentTS(w http.ResponseWriter, r *http.Request) {
 	}
 
 	sid := r.URL.Query().Get("id")
+	sessionsMu.RLock()
 	session := sessions[sid]
+	sessionsMu.RUnlock()
 	if session == nil {
 		http.NotFound(w, r)
 		return
@@ -212,7 +225,9 @@ func handlerInit(w http.ResponseWriter, r *http.Request) {
 	}
 
 	sid := r.URL.Query().Get("id")
+	sessionsMu.RLock()
 	session := sessions[sid]
+	sessionsMu.RUnlock()
 	if session == nil {
 		http.NotFound(w, r)
 		return
@@ -233,7 +248,9 @@ func handlerSegmentMP4(w http.ResponseWriter, r *http.Request) {
 	}
 
 	sid := r.URL.Query().Get("id")
+	sessionsMu.RLock()
 	session := sessions[sid]
+	sessionsMu.RUnlock()
 	if session == nil {
 		http.NotFound(w, r)
 		return

cmd/mp4/mp4.go

@@ -1,17 +1,17 @@
 package mp4
 
 import (
-	"github.com/AlexxIT/go2rtc/cmd/api"
-	"github.com/AlexxIT/go2rtc/cmd/app"
-	"github.com/AlexxIT/go2rtc/cmd/streams"
-	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/mp4"
-	"github.com/AlexxIT/go2rtc/pkg/tcp"
-	"github.com/rs/zerolog"
 	"net/http"
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/AlexxIT/go2rtc/cmd/api"
+	"github.com/AlexxIT/go2rtc/cmd/app"
+	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/mp4"
+	"github.com/AlexxIT/go2rtc/pkg/tcp"
+	"github.com/rs/zerolog"
 )
 
 func Init() {
@@ -44,18 +44,22 @@ func handlerKeyframe(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	exit := make(chan []byte)
+	exit := make(chan []byte, 1)
 
 	cons := &mp4.Segment{OnlyKeyframe: true}
 	cons.Listen(func(msg any) {
 		if data, ok := msg.([]byte); ok && exit != nil {
-			exit <- data
+			select {
+			case exit <- data:
+			default:
+			}
 			exit = nil
 		}
 	})
 
 	if err := stream.AddConsumer(cons); err != nil {
 		log.Error().Err(err).Caller().Send()
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
@@ -75,18 +79,13 @@ func handlerKeyframe(w http.ResponseWriter, r *http.Request) {
 func handlerMP4(w http.ResponseWriter, r *http.Request) {
 	log.Trace().Msgf("[mp4] %s %+v", r.Method, r.Header)
 
-	// Chrome has Safari in UA, so check first Chrome and later Safari
+	query := r.URL.Query()
+
 	ua := r.UserAgent()
-	if strings.Contains(ua, " Chrome/") {
+	if strings.Contains(ua, " Safari/") && !strings.Contains(ua, " Chrome/") && !query.Has("duration") {
-		if r.Header.Values("Range") == nil {
-			w.Header().Set("Content-Type", "video/mp4")
-			w.WriteHeader(http.StatusOK)
-			return
-		}
-	} else if strings.Contains(ua, " Safari/") {
 		// auto redirect to HLS/fMP4 format, because Safari not support MP4 stream
 		url := "stream.m3u8?" + r.URL.RawQuery
-		if !r.URL.Query().Has("mp4") {
+		if !query.Has("mp4") {
 			url += "&mp4"
 		}
 
@@ -94,25 +93,31 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	src := r.URL.Query().Get("src")
+	src := query.Get("src")
 	stream := streams.GetOrNew(src)
 	if stream == nil {
 		http.Error(w, api.StreamNotFound, http.StatusNotFound)
 		return
 	}
 
-	exit := make(chan error)
+	exit := make(chan error, 1) // Add buffer to prevent blocking
 
 	cons := &mp4.Consumer{
 		RemoteAddr: tcp.RemoteAddr(r),
 		UserAgent:  r.UserAgent(),
-		Medias:     core.ParseQuery(r.URL.Query()),
+		Medias:     mp4.ParseQuery(r.URL.Query()),
 	}
 
 	cons.Listen(func(msg any) {
+		if exit == nil {
+			return
+		}
 		if data, ok := msg.([]byte); ok {
-			if _, err := w.Write(data); err != nil && exit != nil {
+			if _, err := w.Write(data); err != nil {
-				exit <- err
+				select {
+				case exit <- err:
+				default:
+				}
 				exit = nil
 			}
 		}
@@ -120,6 +125,7 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 
 	if err := stream.AddConsumer(cons); err != nil {
 		log.Error().Err(err).Caller().Send()
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
@@ -130,22 +136,27 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 	data, err := cons.Init()
 	if err != nil {
 		log.Error().Err(err).Caller().Send()
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
 	if _, err = w.Write(data); err != nil {
 		log.Error().Err(err).Caller().Send()
+		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
 	}
 
 	cons.Start()
 
 	var duration *time.Timer
-	if s := r.URL.Query().Get("duration"); s != "" {
+	if s := query.Get("duration"); s != "" {
 		if i, _ := strconv.Atoi(s); i > 0 {
 			duration = time.AfterFunc(time.Second*time.Duration(i), func() {
 				if exit != nil {
-					exit <- nil
+					select {
+					case exit <- nil:
+					default:
+					}
 					exit = nil
 				}
 			})
@@ -153,6 +164,7 @@ func handlerMP4(w http.ResponseWriter, r *http.Request) {
 	}
 
 	err = <-exit
+	exit = nil
 
 	log.Trace().Err(err).Caller().Send()
 

cmd/mp4/ws.go

@@ -110,6 +110,12 @@ func parseMedias(codecs string, parseAudio bool) (medias []*core.Media) {
 		case mp4.MimeAAC:
 			codec := &core.Codec{Name: core.CodecAAC}
 			audios = append(audios, codec)
+		case mp4.MimeFlac:
+			audios = append(audios,
+				&core.Codec{Name: core.CodecPCMA},
+				&core.Codec{Name: core.CodecPCMU},
+				&core.Codec{Name: core.CodecPCM},
+			)
 		case mp4.MimeOpus:
 			codec := &core.Codec{Name: core.CodecOpus}
 			audios = append(audios, codec)

cmd/rtsp/rtsp.go

@@ -1,6 +1,11 @@
 package rtsp
 
 import (
+	"io"
+	"net"
+	"net/url"
+	"strings"
+
 	"github.com/AlexxIT/go2rtc/cmd/app"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
 	"github.com/AlexxIT/go2rtc/pkg/core"
@@ -8,9 +13,6 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/rtsp"
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"github.com/rs/zerolog"
-	"net"
-	"net/url"
-	"strings"
 )
 
 func Init() {
@@ -123,6 +125,7 @@ func rtspHandler(url string) (core.Producer, error) {
 		if !backchannel {
 			return nil, err
 		}
+		log.Trace().Msgf("[rtsp] describe (backchannel=%t) err: %v", backchannel, err)
 
 		// second try without backchannel, we need to reconnect
 		conn.Backchannel = false
@@ -211,7 +214,9 @@ func tcpHandler(conn *rtsp.Conn) {
 	})
 
 	if err := conn.Accept(); err != nil {
-		log.Warn().Err(err).Caller().Send()
+		if err != io.EOF {
+			log.Warn().Err(err).Caller().Send()
+		}
 		if closer != nil {
 			closer()
 		}

cmd/streams/init.go

@@ -7,6 +7,7 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/app/store"
 	"github.com/rs/zerolog"
 	"net/http"
+	"net/url"
 )
 
 func Init() {
@@ -39,6 +40,20 @@ func New(name string, source any) *Stream {
 	return stream
 }
 
+func NewTemplate(name string, source any) *Stream {
+	// check if source links to some stream name from go2rtc
+	if rawURL, ok := source.(string); ok {
+		if u, err := url.Parse(rawURL); err == nil && u.Scheme == "rtsp" {
+			if stream, ok := streams[u.Path[1:]]; ok {
+				streams[name] = stream
+				return stream
+			}
+		}
+	}
+
+	return New(name, "{input}")
+}
+
 func GetOrNew(src string) *Stream {
 	if stream, ok := streams[src]; ok {
 		return stream
@@ -85,11 +100,12 @@ func streamsHandler(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 
-		if stream := Get(name); stream != nil {
+		// support {input} templates: https://github.com/AlexxIT/go2rtc#module-hass
-			stream.SetSource(src)
+		stream := Get(name)
-		} else {
+		if stream == nil {
-			New(name, src)
+			stream = NewTemplate(name, src)
 		}
+		stream.SetSource(src)
 
 	case "POST":
 		// with dst - redirect source to dst

cmd/streams/producer.go

@@ -30,8 +30,6 @@ type Producer struct {
 	receivers []*core.Receiver
 	senders   []*core.Receiver
 
-	lastErr error
-
 	state    state
 	mu       sync.Mutex
 	workerID int

cmd/streams/stream.go

@@ -3,7 +3,6 @@ package streams
 import (
 	"encoding/json"
 	"errors"
-	"fmt"
 	"github.com/AlexxIT/go2rtc/pkg/core"
 	"strings"
 	"sync"
@@ -31,8 +30,6 @@ func NewStream(source any) *Stream {
 			s.producers = append(s.producers, prod)
 		}
 		return s
-	case *Stream:
-		return source
 	case map[string]any:
 		return NewStream(source["url"])
 	case nil:
@@ -50,24 +47,28 @@ func (s *Stream) SetSource(source string) {
 
 func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 	// support for multiple simultaneous requests from different consumers
-	atomic.AddInt32(&s.requests, 1)
+	consN := atomic.AddInt32(&s.requests, 1) - 1
 
-	var producers []*Producer // matched producers for consumer
+	var statErrors []error
-
+	var statMedias []*core.Media
-	var codecs string
+	var statProds []*Producer // matched producers for consumer
 
 	// Step 1. Get consumer medias
 	for _, consMedia := range cons.GetMedias() {
+		log.Trace().Msgf("[streams] check cons=%d media=%s", consN, consMedia)
 
 	producers:
-		for _, prod := range s.producers {
+		for prodN, prod := range s.producers {
 			if err = prod.Dial(); err != nil {
+				log.Trace().Err(err).Msgf("[streams] skip prod=%s", prod.url)
+				statErrors = append(statErrors, err)
 				continue
 			}
 
 			// Step 2. Get producer medias (not tracks yet)
 			for _, prodMedia := range prod.GetMedias() {
-				collectCodecs(prodMedia, &codecs)
+				log.Trace().Msgf("[streams] check prod=%d media=%s", prodN, prodMedia)
+				statMedias = append(statMedias, prodMedia)
 
 				// Step 3. Match consumer/producer codecs list
 				prodCodec, consCodec := prodMedia.MatchMedia(consMedia)
@@ -79,6 +80,8 @@ func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 
 				switch prodMedia.Direction {
 				case core.DirectionRecvonly:
+					log.Trace().Msgf("[streams] match prod=%d => cons=%d", prodN, consN)
+
 					// Step 4. Get recvonly track from producer
 					if track, err = prod.GetTrack(prodMedia, prodCodec); err != nil {
 						log.Info().Err(err).Msg("[streams] can't get track")
@@ -91,6 +94,8 @@ func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 					}
 
 				case core.DirectionSendonly:
+					log.Trace().Msgf("[streams] match cons=%d => prod=%d", consN, prodN)
+
 					// Step 4. Get recvonly track from consumer (backchannel)
 					if track, err = cons.(core.Producer).GetTrack(consMedia, consCodec); err != nil {
 						log.Info().Err(err).Msg("[streams] can't get track")
@@ -103,7 +108,7 @@ func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 					}
 				}
 
-				producers = append(producers, prod)
+				statProds = append(statProds, prod)
 
 				if !consMedia.MatchAll() {
 					break producers
@@ -117,18 +122,8 @@ func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 		s.stopProducers()
 	}
 
-	if len(producers) == 0 {
+	if len(statProds) == 0 {
-		if len(codecs) > 0 {
+		return formatError(statMedias, statErrors)
-			return errors.New("codecs not match: " + codecs)
-		}
-
-		for i, producer := range s.producers {
-			if producer.lastErr != nil {
-				return fmt.Errorf("source %d error: %w", i, producer.lastErr)
-			}
-		}
-
-		return fmt.Errorf("sources unavailable: %d", len(s.producers))
 	}
 
 	s.mu.Lock()
@@ -136,7 +131,7 @@ func (s *Stream) AddConsumer(cons core.Consumer) (err error) {
 	s.mu.Unlock()
 
 	// there may be duplicates, but that's not a problem
-	for _, prod := range producers {
+	for _, prod := range statProds {
 		prod.start()
 	}
 
@@ -185,6 +180,11 @@ producers:
 				continue producers
 			}
 		}
+		for _, track := range producer.senders {
+			if len(track.Senders()) > 0 {
+				continue producers
+			}
+		}
 		producer.stop()
 	}
 	s.mu.Unlock()
@@ -208,22 +208,47 @@ func (s *Stream) MarshalJSON() ([]byte, error) {
 	return json.Marshal(info)
 }
 
-func collectCodecs(media *core.Media, codecs *string) {
+func formatError(statMedias []*core.Media, statErrors []error) error {
-	if media.Direction == core.DirectionRecvonly {
+	var text string
-		return
-	}
 
-	for _, codec := range media.Codecs {
+	for _, media := range statMedias {
-		name := codec.Name
+		if media.Direction == core.DirectionRecvonly {
-		if name == core.CodecAAC {
-			name = "AAC"
-		}
-		if strings.Contains(*codecs, name) {
 			continue
 		}
-		if len(*codecs) > 0 {
+
-			*codecs += ","
+		for _, codec := range media.Codecs {
+			name := codec.Name
+			if name == core.CodecAAC {
+				name = "AAC"
+			}
+			if strings.Contains(text, name) {
+				continue
+			}
+			if len(text) > 0 {
+				text += ","
+			}
+			text += name
 		}
-		*codecs += name
 	}
+
+	if text != "" {
+		return errors.New(text)
+	}
+
+	for _, err := range statErrors {
+		s := err.Error()
+		if strings.Contains(text, s) {
+			continue
+		}
+		if len(text) > 0 {
+			text += ","
+		}
+		text += s
+	}
+
+	if text != "" {
+		return errors.New(text)
+	}
+
+	return errors.New("unknown error")
 }

cmd/streams/stream_test.go

@@ -0,0 +1,19 @@
+package streams
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestTemplate(t *testing.T) {
+	source1 := "does not matter"
+
+	stream1 := New("from_yaml", source1)
+	require.Len(t, streams, 1)
+
+	stream2 := NewTemplate("camera.from_hass", "rtsp://localhost:8554/from_yaml?video")
+
+	require.Equal(t, stream1, stream2)
+	require.Equal(t, stream2.producers[0].url, source1)
+	require.Len(t, streams, 2)
+}

cmd/tcp/init.go

@@ -0,0 +1,35 @@
+package tcp
+
+import (
+	"github.com/AlexxIT/go2rtc/cmd/streams"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/mpegts"
+	"net"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+func Init() {
+	streams.HandleFunc("tcp", handle)
+}
+
+func handle(rawURL string) (core.Producer, error) {
+	u, err := url.Parse(rawURL)
+	if err != nil {
+		return nil, err
+	}
+
+	conn, err := net.DialTimeout("tcp", u.Host, time.Second*3)
+	if err != nil {
+		return nil, err
+	}
+
+	req := &http.Request{URL: u}
+	res := &http.Response{Body: conn, Request: req}
+	client := mpegts.NewClient(res)
+	if err := client.Handle(); err != nil {
+		return nil, err
+	}
+	return client, nil
+}

go.mod

@@ -16,6 +16,8 @@ require (
 	github.com/pion/stun v0.4.0
 	github.com/pion/webrtc/v3 v3.1.58
 	github.com/rs/zerolog v1.29.0
+	github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3
+	github.com/sigurn/crc8 v0.0.0-20220107193325-2243fe600f9f
 	github.com/stretchr/testify v1.8.2
 	github.com/tadglines/go-pkgs v0.0.0-20210623144937-b983b20f54f9
 	gopkg.in/yaml.v3 v3.0.1

go.sum

@@ -106,6 +106,10 @@ github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/rs/zerolog v1.29.0 h1:Zes4hju04hjbvkVkOhdl2HpZa+0PmVwigmo8XoORE5w=
 github.com/rs/zerolog v1.29.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
 github.com/sclevine/agouti v3.0.0+incompatible/go.mod h1:b4WX9W9L1sfQKXeJf1mUTLZKJ48R1S7H23Ji7oFO5Bw=
+github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3 h1:aQKxg3+2p+IFXXg97McgDGT5zcMrQoi0EICZs8Pgchs=
+github.com/sigurn/crc16 v0.0.0-20211026045750-20ab5afb07e3/go.mod h1:9/etS5gpQq9BJsJMWg1wpLbfuSnkm8dPF6FdW2JXVhA=
+github.com/sigurn/crc8 v0.0.0-20220107193325-2243fe600f9f h1:1R9KdKjCNSd7F8iGTxIpoID9prlYH8nuNYKt0XvweHA=
+github.com/sigurn/crc8 v0.0.0-20220107193325-2243fe600f9f/go.mod h1:vQhwQ4meQEDfahT5kd61wLAF5AAeh5ZPLVI4JJ/tYo8=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=

hardware.Dockerfile

@@ -1,7 +1,9 @@
+# syntax=docker/dockerfile:labs
+
 # 0. Prepare images
 # only debian 12 (bookworm) has latest ffmpeg
 ARG DEBIAN_VERSION="bookworm-slim"
-ARG GO_VERSION="1.19-buster"
+ARG GO_VERSION="1.20-buster"
 ARG NGROK_VERSION="3"
 
 FROM debian:${DEBIAN_VERSION} AS base
@@ -16,37 +18,39 @@ WORKDIR /build
 
 # Cache dependencies
 COPY go.mod go.sum ./
-RUN go mod download
+RUN --mount=type=cache,target=/root/.cache/go-build go mod download
 
 COPY . .
-RUN CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath
+RUN --mount=type=cache,target=/root/.cache/go-build CGO_ENABLED=0 go build -ldflags "-s -w" -trimpath
 
 
 # 2. Collect all files
 FROM scratch AS rootfs
 
-COPY --from=build /build/go2rtc /usr/local/bin/
+COPY --link --from=build /build/go2rtc /usr/local/bin/
-COPY --from=ngrok /bin/ngrok /usr/local/bin/
+COPY --link --from=ngrok /bin/ngrok /usr/local/bin/
-COPY ./build/docker/run.sh /
-
 
 # 3. Final image
 FROM base
-
+# Prepare apt for buildkit cache
+RUN rm -f /etc/apt/apt.conf.d/docker-clean \
+  && echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' >/etc/apt/apt.conf.d/keep-cache
 # Install ffmpeg, bash (for run.sh), tini (for signal handling),
 # and other common tools for the echo source.
 # non-free for Intel QSV support (not used by go2rtc, just for tests)
-RUN echo 'deb http://deb.debian.org/debian bookworm non-free' > /etc/apt/sources.list.d/debian-non-free.list && \
+RUN --mount=type=cache,target=/var/cache/apt,sharing=locked --mount=type=cache,target=/var/lib/apt,sharing=locked \
+    echo 'deb http://deb.debian.org/debian bookworm non-free' > /etc/apt/sources.list.d/debian-non-free.list && \
     apt-get -y update && apt-get -y install tini ffmpeg python3 curl jq intel-media-va-driver-non-free
 
-COPY --from=rootfs / /
+COPY --link --from=rootfs / /
+
 
-RUN chmod a+x /run.sh && mkdir -p /config
 
 ENTRYPOINT ["/usr/bin/tini", "--"]
-
+VOLUME /config
+WORKDIR /config
 # https://github.com/NVIDIA/nvidia-docker/wiki/Installation-(Native-GPU-Support)
 ENV NVIDIA_VISIBLE_DEVICES all
 ENV NVIDIA_DRIVER_CAPABILITIES compute,video,utility
 
-CMD ["/run.sh"]
+CMD ["go2rtc", "-config", "/config/go2rtc.yaml"]

main.go

@@ -24,6 +24,7 @@ import (
 	"github.com/AlexxIT/go2rtc/cmd/srtp"
 	"github.com/AlexxIT/go2rtc/cmd/streams"
 	"github.com/AlexxIT/go2rtc/cmd/tapo"
+	"github.com/AlexxIT/go2rtc/cmd/tcp"
 	"github.com/AlexxIT/go2rtc/cmd/webrtc"
 	"github.com/AlexxIT/go2rtc/cmd/webtorrent"
 	"os"
@@ -49,6 +50,7 @@ func main() {
 	isapi.Init()
 	mpegts.Init()
 	roborock.Init()
+	tcp.Init()
 
 	srtp.Init()
 	homekit.Init()

pkg/core/codec.go

@@ -99,9 +99,16 @@ func UnmarshalCodec(md *sdp.MediaDescription, payloadType string) *Codec {
 		case "8":
 			c.Name = CodecPCMA
 			c.ClockRate = 8000
+		case "10":
+			c.Name = CodecPCM
+			c.ClockRate = 44100
+			c.Channels = 2
+		case "11":
+			c.Name = CodecPCM
+			c.ClockRate = 44100
 		case "14":
 			c.Name = CodecMP3
-			c.ClockRate = 44100
+			c.ClockRate = 90000 // it's not real sample rate
 		case "26":
 			c.Name = CodecJPEG
 			c.ClockRate = 90000

pkg/core/core.go

@@ -27,7 +27,8 @@ const (
 	CodecMP3  = "MPA" // payload: 14, aka MPEG-1 Layer III
 	CodecPCM  = "L16" // Linear PCM
 
-	CodecELD = "ELD" // AAC-ELD
+	CodecELD  = "ELD" // AAC-ELD
+	CodecFLAC = "FLAC"
 
 	CodecAll = "ALL"
 	CodecAny = "ANY"

pkg/core/media.go

@@ -82,11 +82,18 @@ func (m *Media) MatchAll() bool {
 	return false
 }
 
+func (m *Media) Equal(media *Media) bool {
+	if media.ID != "" {
+		return m.ID == media.ID
+	}
+	return m.String() == media.String()
+}
+
 func GetKind(name string) string {
 	switch name {
 	case CodecH264, CodecH265, CodecVP8, CodecVP9, CodecAV1, CodecJPEG:
 		return KindVideo
-	case CodecPCMU, CodecPCMA, CodecAAC, CodecOpus, CodecG722, CodecMP3, CodecELD:
+	case CodecPCMU, CodecPCMA, CodecAAC, CodecOpus, CodecG722, CodecMP3, CodecPCM, CodecELD, CodecFLAC:
 		return KindAudio
 	}
 	return ""
@@ -129,6 +136,10 @@ func MarshalSDP(name string, medias []*Media) ([]byte, error) {
 		}
 		md.WithCodec(codec.PayloadType, name, codec.ClockRate, codec.Channels, codec.FmtpLine)
 
+		if media.ID != "" {
+			md.WithValueAttribute("control", media.ID)
+		}
+
 		sd.MediaDescriptions = append(sd.MediaDescriptions, md)
 	}
 

pkg/core/track.go

@@ -18,7 +18,7 @@ type Receiver struct {
 	ID byte // Channel for RTSP, PayloadType for MPEG-TS
 
 	senders map[*Sender]chan *rtp.Packet
-	mu      sync.Mutex
+	mu      sync.RWMutex
 	bytes   int
 }
 
@@ -32,9 +32,9 @@ func (t *Receiver) WriteRTP(packet *rtp.Packet) {
 	t.mu.Lock()
 	t.bytes += len(packet.Payload)
 	for sender, buffer := range t.senders {
-		if len(buffer) < cap(buffer) {
+		select {
-			buffer <- packet
+		case buffer <- packet:
-		} else {
+		default:
 			sender.overflow++
 		}
 	}
@@ -42,11 +42,11 @@ func (t *Receiver) WriteRTP(packet *rtp.Packet) {
 }
 
 func (t *Receiver) Senders() (senders []*Sender) {
-	t.mu.Lock()
+	t.mu.RLock()
 	for sender := range t.senders {
 		senders = append(senders, sender)
 	}
-	t.mu.Unlock()
+	t.mu.RUnlock()
 	return
 }
 
@@ -73,12 +73,9 @@ func (t *Receiver) Replace(target *Receiver) {
 
 func (t *Receiver) String() string {
 	s := t.Codec.String() + ", bytes=" + strconv.Itoa(t.bytes)
-	if t.mu.TryLock() {
+	t.mu.RLock()
-		s += fmt.Sprintf(", senders=%d", len(t.senders))
+	s += fmt.Sprintf(", senders=%d", len(t.senders))
-		t.mu.Unlock()
+	t.mu.RUnlock()
-	} else {
-		s += fmt.Sprintf(", senders=?")
-	}
 	return s
 }
 
@@ -93,7 +90,7 @@ type Sender struct {
 	Handler HandlerFunc
 
 	receivers []*Receiver
-	mu        sync.Mutex
+	mu        sync.RWMutex
 	bytes     int
 
 	overflow int
@@ -127,7 +124,6 @@ func (s *Sender) HandleRTP(track *Receiver) {
 	}
 	track.senders[s] = buffer
 	track.mu.Unlock()
-
 	s.mu.Lock()
 	s.receivers = append(s.receivers, track)
 	s.mu.Unlock()
@@ -135,7 +131,9 @@ func (s *Sender) HandleRTP(track *Receiver) {
 	go func() {
 		// read packets from buffer channel until it will be closed
 		for packet := range buffer {
+			s.mu.Lock()
 			s.bytes += len(packet.Payload)
+			s.mu.Unlock()
 			s.Handler(packet)
 		}
 
@@ -171,12 +169,9 @@ func (s *Sender) Close() {
 
 func (s *Sender) String() string {
 	info := s.Codec.String() + ", bytes=" + strconv.Itoa(s.bytes)
-	if s.mu.TryLock() {
+	s.mu.RLock()
-		info += ", receivers=" + strconv.Itoa(len(s.receivers))
+	info += ", receivers=" + strconv.Itoa(len(s.receivers))
-		s.mu.Unlock()
+	s.mu.RUnlock()
-	} else {
-		info += ", receivers=?"
-	}
 	if s.overflow > 0 {
 		info += ", overflow=" + strconv.Itoa(s.overflow)
 	}

pkg/iso/atoms.go

@@ -32,6 +32,16 @@ const (
 	Mdat                        = "mdat"
 )
 
+const (
+	sampleIsNonSync  = 0x10000
+	sampleDependsOn1 = 0x1000000
+	sampleDependsOn2 = 0x2000000
+
+	SampleVideoIFrame    = sampleDependsOn2
+	SampleVideoNonIFrame = sampleDependsOn1 | sampleIsNonSync
+	SampleAudio          = sampleIsNonSync
+)
+
 func (m *Movie) WriteFileType() {
 	m.StartAtom(Ftyp)
 	m.WriteString("iso5")
@@ -250,7 +260,7 @@ func (m *Movie) WriteAudioTrack(id uint32, codec string, timescale uint32, chann
 	m.EndAtom() // TRAK
 }
 
-func (m *Movie) WriteMovieFragment(seq, tid, duration, size uint32, time uint64) {
+func (m *Movie) WriteMovieFragment(seq, tid, duration, size, flags uint32, time uint64) {
 	m.StartAtom(Moof)
 
 	m.StartAtom(MoofMfhd)
@@ -276,10 +286,10 @@ func (m *Movie) WriteMovieFragment(seq, tid, duration, size uint32, time uint64)
 			TfhdDefaultSampleFlags |
 			TfhdDefaultBaseIsMoof,
 	)
-	m.WriteUint32(tid)       // track id
+	m.WriteUint32(tid)      // track id
-	m.WriteUint32(duration)  // default sample duration
+	m.WriteUint32(duration) // default sample duration
-	m.WriteUint32(size)      // default sample size
+	m.WriteUint32(size)     // default sample size
-	m.WriteUint32(0x2000000) // default sample flags
+	m.WriteUint32(flags)    // default sample flags
 	m.EndAtom()
 
 	m.StartAtom(MoofTrafTfdt)
@@ -314,5 +324,4 @@ func (m *Movie) WriteData(b []byte) {
 	m.StartAtom(Mdat)
 	m.Write(b)
 	m.EndAtom()
-
 }

pkg/iso/codecs.go

@@ -2,6 +2,7 @@ package iso
 
 import (
 	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/pcm"
 )
 
 func (m *Movie) WriteVideo(codec string, width, height uint16, conf []byte) {
@@ -46,9 +47,11 @@ func (m *Movie) WriteVideo(codec string, width, height uint16, conf []byte) {
 func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, conf []byte) {
 	switch codec {
 	case core.CodecAAC, core.CodecMP3:
-		m.StartAtom("mp4a")
+		m.StartAtom("mp4a") // supported in all players and browsers
+	case core.CodecFLAC:
+		m.StartAtom("fLaC") // supported in all players and browsers
 	case core.CodecOpus:
-		m.StartAtom("Opus")
+		m.StartAtom("Opus") // supported in Chrome and Firefox
 	case core.CodecPCMU:
 		m.StartAtom("ulaw")
 	case core.CodecPCMA:
@@ -56,6 +59,11 @@ func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, con
 	default:
 		panic("unsupported iso audio: " + codec)
 	}
+
+	if channels == 0 {
+		channels = 1
+	}
+
 	m.Skip(6)
 	m.WriteUint16(1)                    // data_reference_index
 	m.Skip(2)                           // version
@@ -72,6 +80,10 @@ func (m *Movie) WriteAudio(codec string, channels uint16, sampleRate uint32, con
 		m.WriteEsdsAAC(conf)
 	case core.CodecMP3:
 		m.WriteEsdsMP3()
+	case core.CodecFLAC:
+		m.StartAtom("dfLa")
+		m.Write(pcm.FLACHeader(false, sampleRate))
+		m.EndAtom()
 	case core.CodecOpus:
 		// don't know what means this magic
 		m.StartAtom("dOps")
@@ -106,6 +118,7 @@ func (m *Movie) WriteEsdsAAC(conf []byte) {
 	m.Skip(2) // es id
 	m.Skip(1) // es flags
 
+	// https://learn.microsoft.com/en-us/windows/win32/medfound/mpeg-4-file-sink#aac-audio
 	m.WriteBytes(4, 0x80, 0x80, 0x80, size4+header+size5)
 	m.WriteBytes(0x40) // object id
 	m.WriteBytes(0x15) // stream type
@@ -139,6 +152,7 @@ func (m *Movie) WriteEsdsMP3() {
 	m.Skip(2) // es id
 	m.Skip(1) // es flags
 
+	// https://learn.microsoft.com/en-us/windows/win32/medfound/mpeg-4-file-sink#mp3-audio
 	m.WriteBytes(4, 0x80, 0x80, 0x80, size4)
 	m.WriteBytes(0x6B) // object id
 	m.WriteBytes(0x15) // stream type

pkg/mp4/consumer.go

@@ -6,7 +6,9 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
+	"github.com/AlexxIT/go2rtc/pkg/pcm"
 	"github.com/pion/rtp"
+	"sync"
 )
 
 type Consumer struct {
@@ -19,6 +21,7 @@ type Consumer struct {
 	senders []*core.Sender
 
 	muxer *Muxer
+	mu    sync.Mutex
 	wait  byte
 
 	send int
@@ -52,7 +55,8 @@ func (c *Consumer) GetMedias() []*core.Media {
 func (c *Consumer) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiver) error {
 	trackID := byte(len(c.senders))
 
-	handler := core.NewSender(media, track.Codec)
+	codec := track.Codec.Clone()
+	handler := core.NewSender(media, codec)
 
 	switch track.Codec.Name {
 	case core.CodecH264:
@@ -70,10 +74,12 @@ func (c *Consumer) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiv
 				c.wait = waitNone
 			}
 
+			// important to use Mutex because right fragment order
+			c.mu.Lock()
 			buf := c.muxer.Marshal(trackID, packet)
 			c.Fire(buf)
-
 			c.send += len(buf)
+			c.mu.Unlock()
 		}
 
 		if track.Codec.IsRTP() {
@@ -97,46 +103,48 @@ func (c *Consumer) AddTrack(media *core.Media, _ *core.Codec, track *core.Receiv
 				c.wait = waitNone
 			}
 
+			c.mu.Lock()
 			buf := c.muxer.Marshal(trackID, packet)
 			c.Fire(buf)
-
 			c.send += len(buf)
+			c.mu.Unlock()
 		}
 
 		if track.Codec.IsRTP() {
 			handler.Handler = h265.RTPDepay(track.Codec, handler.Handler)
 		}
 
-	case core.CodecAAC:
-		handler.Handler = func(packet *rtp.Packet) {
-			if c.wait != waitNone {
-				return
-			}
-
-			buf := c.muxer.Marshal(trackID, packet)
-			c.Fire(buf)
-
-			c.send += len(buf)
-		}
-
-		if track.Codec.IsRTP() {
-			handler.Handler = aac.RTPDepay(handler.Handler)
-		}
-
-	case core.CodecOpus, core.CodecMP3, core.CodecPCMU, core.CodecPCMA:
-		handler.Handler = func(packet *rtp.Packet) {
-			if c.wait != waitNone {
-				return
-			}
-
-			buf := c.muxer.Marshal(trackID, packet)
-			c.Fire(buf)
-
-			c.send += len(buf)
-		}
-
 	default:
-		panic("unsupported codec")
+		handler.Handler = func(packet *rtp.Packet) {
+			if c.wait != waitNone {
+				return
+			}
+
+			c.mu.Lock()
+			buf := c.muxer.Marshal(trackID, packet)
+			c.Fire(buf)
+			c.send += len(buf)
+			c.mu.Unlock()
+		}
+
+		switch track.Codec.Name {
+		case core.CodecAAC:
+			if track.Codec.IsRTP() {
+				handler.Handler = aac.RTPDepay(handler.Handler)
+			}
+		case core.CodecOpus, core.CodecMP3: // no changes
+		case core.CodecPCMA, core.CodecPCMU, core.CodecPCM:
+			handler.Handler = pcm.FLACEncoder(track.Codec, handler.Handler)
+			codec.Name = core.CodecFLAC
+
+		default:
+			handler.Handler = nil
+		}
+	}
+
+	if handler.Handler == nil {
+		println("ERROR: MP4 unsupported codec: " + track.Codec.String())
+		return nil
 	}
 
 	handler.HandleRTP(track)

pkg/mp4/helpers.go

@@ -4,9 +4,45 @@ import "github.com/AlexxIT/go2rtc/pkg/core"
 
 // ParseQuery - like usual parse, but with mp4 param handler
 func ParseQuery(query map[string][]string) []*core.Media {
-	if query["mp4"] != nil {
+	if v := query["mp4"]; len(v) != 0 {
-		cons := Consumer{}
+		medias := []*core.Media{
-		return cons.GetMedias()
+			{
+				Kind:      core.KindVideo,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecH264},
+					{Name: core.CodecH265},
+				},
+			},
+			{
+				Kind:      core.KindAudio,
+				Direction: core.DirectionSendonly,
+				Codecs: []*core.Codec{
+					{Name: core.CodecAAC},
+				},
+			},
+		}
+
+		if v[0] == "" {
+			return medias // legacy
+		}
+
+		medias[1].Codecs = append(medias[1].Codecs,
+			&core.Codec{Name: core.CodecPCMA},
+			&core.Codec{Name: core.CodecPCMU},
+			&core.Codec{Name: core.CodecPCM},
+		)
+
+		if v[0] == "flac" {
+			return medias // modern browsers
+		}
+
+		medias[1].Codecs = append(medias[1].Codecs,
+			&core.Codec{Name: core.CodecOpus},
+			&core.Codec{Name: core.CodecMP3},
+		)
+
+		return medias // Chrome, FFmpeg, VLC
 	}
 
 	return core.ParseQuery(query)

pkg/mp4/muxer.go

@@ -15,12 +15,14 @@ type Muxer struct {
 	fragIndex uint32
 	dts       []uint64
 	pts       []uint32
+	codecs    []*core.Codec
 }
 
 const (
 	MimeH264 = "avc1.640029"
 	MimeH265 = "hvc1.1.6.L153.B0"
 	MimeAAC  = "mp4a.40.2"
+	MimeFlac = "flac"
 	MimeOpus = "opus"
 )
 
@@ -43,6 +45,8 @@ func (m *Muxer) MimeCodecs(codecs []*core.Codec) string {
 			s += MimeAAC
 		case core.CodecOpus:
 			s += MimeOpus
+		case core.CodecFLAC:
+			s += MimeFlac
 		}
 	}
 
@@ -108,14 +112,15 @@ func (m *Muxer) GetInit(codecs []*core.Codec) ([]byte, error) {
 				uint32(i+1), codec.Name, codec.ClockRate, codec.Channels, b,
 			)
 
-		case core.CodecOpus, core.CodecMP3, core.CodecPCMU, core.CodecPCMA:
+		case core.CodecOpus, core.CodecMP3, core.CodecPCMA, core.CodecPCMU, core.CodecPCM, core.CodecFLAC:
 			mv.WriteAudioTrack(
 				uint32(i+1), codec.Name, codec.ClockRate, codec.Channels, nil,
 			)
 		}
 
-		m.pts = append(m.pts, 0)
 		m.dts = append(m.dts, 0)
+		m.pts = append(m.pts, 0)
+		m.codecs = append(m.codecs, codec)
 	}
 
 	mv.StartAtom(iso.MoovMvex)
@@ -138,28 +143,49 @@ func (m *Muxer) Reset() {
 }
 
 func (m *Muxer) Marshal(trackID byte, packet *rtp.Packet) []byte {
-	// important before increment
+	codec := m.codecs[trackID]
-	time := m.dts[trackID]
+
+	duration := packet.Timestamp - m.pts[trackID]
+	m.pts[trackID] = packet.Timestamp
+
+	// minumum duration important for MSE in Apple Safari
+	if duration == 0 || duration > codec.ClockRate {
+		duration = codec.ClockRate/1000 + 1
+		m.pts[trackID] += duration
+	}
+
+	size := len(packet.Payload)
+
+	// flags important for Apple Finder video preview
+	var flags uint32
+	switch codec.Name {
+	case core.CodecH264:
+		if h264.IsKeyframe(packet.Payload) {
+			flags = iso.SampleVideoIFrame
+		} else {
+			flags = iso.SampleVideoNonIFrame
+		}
+	case core.CodecH265:
+		if h265.IsKeyframe(packet.Payload) {
+			flags = iso.SampleVideoIFrame
+		} else {
+			flags = iso.SampleVideoNonIFrame
+		}
+	default:
+		flags = iso.SampleAudio // not important
+	}
 
 	m.fragIndex++
 
-	var duration uint32
+	mv := iso.NewMovie(1024 + size)
-	newTime := packet.Timestamp
-	if m.pts[trackID] > 0 {
-		duration = newTime - m.pts[trackID]
-		m.dts[trackID] += uint64(duration)
-	} else {
-		// important, or Safari will fail with first frame
-		duration = 1
-	}
-	m.pts[trackID] = newTime
-
-	mv := iso.NewMovie(1024 + len(packet.Payload))
 	mv.WriteMovieFragment(
-		m.fragIndex, uint32(trackID+1), duration,
+		m.fragIndex, uint32(trackID+1), duration, uint32(size), flags, m.dts[trackID],
-		uint32(len(packet.Payload)), time,
 	)
 	mv.WriteData(packet.Payload)
 
+	//log.Printf("[MP4] track=%d ts=%6d dur=%5d idx=%3d len=%d", trackID+1, m.dts[trackID], duration, m.fragIndex, len(packet.Payload))
+
+	m.dts[trackID] += uint64(duration)
+
 	return mv.Bytes()
 }

pkg/pcm/flac.go

@@ -0,0 +1,146 @@
+// Package pcm - support raw (verbatim) PCM 16 bit in the FLAC container:
+// - only 1 channel
+// - only 16 bit per sample
+// - only 8000, 16000, 24000, 48000 sample rate
+package pcm
+
+import (
+	"encoding/binary"
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/rtp"
+	"github.com/sigurn/crc16"
+	"github.com/sigurn/crc8"
+	"unicode/utf8"
+)
+
+func FLACHeader(magic bool, sampleRate uint32) []byte {
+	b := make([]byte, 42)
+
+	if magic {
+		copy(b, "fLaC") // [0..3]
+	}
+
+	// https://xiph.org/flac/format.html#metadata_block_header
+	b[4] = 0x80 // [4] lastMetadata=1 (1 bit), blockType=0 - STREAMINFO (7 bit)
+	b[7] = 0x22 // [5..7] blockLength=34 (24 bit)
+
+	// Important for Apple QuickTime player:
+	// 1. Both values should be same
+	// 2. Maximum value = 32768
+	binary.BigEndian.PutUint16(b[8:], 32768)  // [8..9] info.BlockSizeMin=16 (16 bit)
+	binary.BigEndian.PutUint16(b[10:], 32768) // [10..11] info.BlockSizeMin=65535 (16 bit)
+
+	// [12..14] info.FrameSizeMin=0 (24 bit)
+	// [15..17] info.FrameSizeMax=0 (24 bit)
+
+	b[18] = byte(sampleRate >> 12)
+	b[19] = byte(sampleRate >> 4)
+	b[20] = byte(sampleRate << 4) // [18..20] info.SampleRate=8000 (20 bit), info.NChannels=1-1 (3 bit)
+
+	b[21] = 0xF0 // [21..25] info.BitsPerSample=16-1 (5 bit), info.NSamples (36 bit)
+
+	// [26..41] MD5sum (16 bytes)
+
+	return b
+}
+
+var table8 *crc8.Table
+var table16 *crc16.Table
+
+func FLACEncoder(codec *core.Codec, handler core.HandlerFunc) core.HandlerFunc {
+	if codec.Channels >= 2 {
+		return nil
+	}
+
+	var sr byte
+	switch codec.ClockRate {
+	case 8000:
+		sr = 0b0100
+	case 16000:
+		sr = 0b0101
+	case 22050:
+		sr = 0b0110
+	case 24000:
+		sr = 0b0111
+	case 32000:
+		sr = 0b1000
+	case 44100:
+		sr = 0b1001
+	case 48000:
+		sr = 0b1010
+	case 96000:
+		sr = 0b1011
+	default:
+		return nil
+	}
+
+	if table8 == nil {
+		table8 = crc8.MakeTable(crc8.CRC8)
+	}
+	if table16 == nil {
+		table16 = crc16.MakeTable(crc16.CRC16_BUYPASS)
+	}
+
+	var sampleNumber int32
+
+	return func(packet *rtp.Packet) {
+		samples := uint16(len(packet.Payload))
+
+		if codec.Name == core.CodecPCM {
+			samples /= 2
+		}
+
+		// https://xiph.org/flac/format.html#frame_header
+		buf := make([]byte, samples*2+30)
+
+		// 1. Frame header
+		buf[0] = 0xFF
+		buf[1] = 0xF9      // [0..1] syncCode=0xFFF8 - reserved (15 bit), blockStrategy=1 - variable-blocksize (1 bit)
+		buf[2] = 0x70 | sr // blockSizeType=7 (4 bit), sampleRate=4 - 8000 (4 bit)
+		buf[3] = 0x08      // channels=1-1 (4 bit), sampleSize=4 - 16 (3 bit), reserved=0 (1 bit)
+
+		n := 4 + utf8.EncodeRune(buf[4:], sampleNumber) // 4 bytes max
+		sampleNumber += int32(samples)
+
+		// this is wrong but very simple frame block size value
+		binary.BigEndian.PutUint16(buf[n:], samples-1)
+		n += 2
+
+		buf[n] = crc8.Checksum(buf[:n], table8)
+		n += 1
+
+		// 2. Subframe header
+		buf[n] = 0x02 // padding=0 (1 bit), subframeType=1 - verbatim (6 bit), wastedFlag=0 (1 bit)
+		n += 1
+
+		// 3. Subframe
+		switch codec.Name {
+		case core.CodecPCMA:
+			for _, b := range packet.Payload {
+				s16 := PCMAtoPCM(b)
+				buf[n] = byte(s16 >> 8)
+				buf[n+1] = byte(s16)
+				n += 2
+			}
+		case core.CodecPCMU:
+			for _, b := range packet.Payload {
+				s16 := PCMUtoPCM(b)
+				buf[n] = byte(s16 >> 8)
+				buf[n+1] = byte(s16)
+				n += 2
+			}
+		case core.CodecPCM:
+			n += copy(buf[n:], packet.Payload)
+		}
+
+		// 4. Frame footer
+		crc := crc16.Checksum(buf[:n], table16)
+		binary.BigEndian.PutUint16(buf[n:], crc)
+		n += 2
+
+		clone := *packet
+		clone.Payload = buf[:n]
+
+		handler(&clone)
+	}
+}

pkg/pcm/pcm.go

@@ -0,0 +1,116 @@
+package pcm
+
+import (
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/rtp"
+)
+
+func Resample(codec *core.Codec, sampleRate uint32, handler core.HandlerFunc) core.HandlerFunc {
+	n := float32(codec.ClockRate) / float32(sampleRate)
+
+	switch codec.Name {
+	case core.CodecPCMA:
+		return DownsampleByte(PCMAtoPCM, PCMtoPCMA, n, handler)
+	case core.CodecPCMU:
+		return DownsampleByte(PCMUtoPCM, PCMtoPCMU, n, handler)
+	case core.CodecPCM:
+		if n == 1 {
+			return ResamplePCM(PCMtoPCMA, handler)
+		}
+		return DownsamplePCM(PCMtoPCMA, n, handler)
+	}
+
+	panic(core.Caller())
+}
+
+func DownsampleByte(
+	toPCM func(byte) int16, fromPCM func(int16) byte, n float32, handler core.HandlerFunc,
+) core.HandlerFunc {
+	var sampleN, sampleSum float32
+	var ts uint32
+
+	return func(packet *rtp.Packet) {
+		samples := len(packet.Payload)
+		newLen := uint32((float32(samples) + sampleN) / n)
+
+		oldSamples := packet.Payload
+		newSamples := make([]byte, newLen)
+
+		var i int
+		for _, sample := range oldSamples {
+			sampleSum += float32(toPCM(sample))
+			if sampleN++; sampleN >= n {
+				newSamples[i] = fromPCM(int16(sampleSum / n))
+				i++
+
+				sampleSum = 0
+				sampleN -= n
+			}
+		}
+
+		ts += newLen
+
+		clone := *packet
+		clone.Payload = newSamples
+		clone.Timestamp = ts
+		handler(&clone)
+	}
+}
+
+func ResamplePCM(fromPCM func(int16) byte, handler core.HandlerFunc) core.HandlerFunc {
+	var ts uint32
+
+	return func(packet *rtp.Packet) {
+		len1 := len(packet.Payload)
+		len2 := len1 / 2
+
+		oldSamples := packet.Payload
+		newSamples := make([]byte, len2)
+
+		var i2 int
+		for i1 := 0; i1 < len1; i1 += 2 {
+			sample := int16(uint16(oldSamples[i1])<<8 | uint16(oldSamples[i1+1]))
+			newSamples[i2] = fromPCM(sample)
+			i2++
+		}
+
+		ts += uint32(len2)
+
+		clone := *packet
+		clone.Payload = newSamples
+		clone.Timestamp = ts
+		handler(&clone)
+	}
+}
+
+func DownsamplePCM(fromPCM func(int16) byte, n float32, handler core.HandlerFunc) core.HandlerFunc {
+	var sampleN, sampleSum float32
+	var ts uint32
+
+	return func(packet *rtp.Packet) {
+		samples := len(packet.Payload) / 2
+		newLen := uint32((float32(samples) + sampleN) / n)
+
+		oldSamples := packet.Payload
+		newSamples := make([]byte, newLen)
+
+		var i2 int
+		for i1 := 0; i1 < len(packet.Payload); i1 += 2 {
+			sampleSum += float32(int16(uint16(oldSamples[i1])<<8 | uint16(oldSamples[i1+1])))
+			if sampleN++; sampleN >= n {
+				newSamples[i2] = fromPCM(int16(sampleSum / n))
+				i2++
+
+				sampleSum = 0
+				sampleN -= n
+			}
+		}
+
+		ts += newLen
+
+		clone := *packet
+		clone.Payload = newSamples
+		clone.Timestamp = ts
+		handler(&clone)
+	}
+}

pkg/pcm/pcma.go

@@ -0,0 +1,53 @@
+// Package pcm
+// https://www.codeproject.com/Articles/14237/Using-the-G711-standard
+package pcm
+
+const alawMax = 0x7FFF
+
+func PCMAtoPCM(alaw byte) int16 {
+	alaw ^= 0xD5
+
+	data := int16(((alaw & 0x0F) << 4) + 8)
+	exponent := (alaw & 0x70) >> 4
+
+	if exponent != 0 {
+		data |= 0x100
+	}
+
+	if exponent > 1 {
+		data <<= exponent - 1
+	}
+
+	// sign
+	if alaw&0x80 == 0 {
+		return data
+	} else {
+		return -data
+	}
+}
+
+func PCMtoPCMA(pcm int16) byte {
+	var alaw byte
+
+	if pcm < 0 {
+		pcm = -pcm
+		alaw = 0x80
+	}
+
+	if pcm > alawMax {
+		pcm = alawMax
+	}
+
+	exponent := byte(7)
+	for expMask := int16(0x4000); (pcm&expMask) == 0 && exponent > 0; expMask >>= 1 {
+		exponent--
+	}
+
+	if exponent == 0 {
+		alaw |= byte(pcm>>4) & 0x0F
+	} else {
+		alaw |= (exponent << 4) | (byte(pcm>>(exponent+3)) & 0x0F)
+	}
+
+	return alaw ^ 0xD5
+}

pkg/pcm/pcmu.go

@@ -0,0 +1,51 @@
+// Package pcm
+// https://www.codeproject.com/Articles/14237/Using-the-G711-standard
+package pcm
+
+const bias = 0x84 // 132 or 1000 0100
+const ulawMax = alawMax - bias
+
+func PCMUtoPCM(ulaw byte) int16 {
+	ulaw = ^ulaw
+
+	exponent := (ulaw & 0x70) >> 4
+	data := (int16((((ulaw&0x0F)|0x10)<<1)+1) << (exponent + 2)) - bias
+
+	// sign
+	if ulaw&0x80 == 0 {
+		return data
+	} else if data == 0 {
+		return -1
+	} else {
+		return -data
+	}
+}
+
+func PCMtoPCMU(pcm int16) byte {
+	var ulaw byte
+
+	if pcm < 0 {
+		pcm = -pcm
+		ulaw = 0x80
+	}
+
+	if pcm > ulawMax {
+		pcm = ulawMax
+	}
+
+	pcm += bias
+
+	exponent := byte(7)
+	for expMask := int16(0x4000); (pcm & expMask) == 0; expMask >>= 1 {
+		exponent--
+	}
+
+	// mantisa
+	ulaw |= byte(pcm>>(exponent+3)) & 0x0F
+
+	if exponent > 0 {
+		ulaw |= exponent << 4
+	}
+
+	return ^ulaw
+}

pkg/pcm/v1/pcm.go

@@ -0,0 +1,155 @@
+// Package v1
+// http://web.archive.org/web/20110719132013/http://hazelware.luggle.com/tutorials/mulawcompression.html
+package v1
+
+const cBias = 0x84
+const cClip = 32635
+
+var MuLawCompressTable = [256]byte{
+	0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
+	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+	5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+	5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+}
+
+func LinearToMuLawSample(sample int16) byte {
+	sign := byte(sample>>8) & 0x80
+	if sign != 0 {
+		sample = -sample
+	}
+
+	if sample > cClip {
+		sample = cClip
+	}
+	sample = sample + cBias
+
+	exponent := MuLawCompressTable[(sample>>7)&0xFF]
+	mantissa := byte(sample>>(exponent+3)) & 0x0F
+
+	compressedByte := ^(sign | (exponent << 4) | mantissa)
+
+	return compressedByte
+}
+
+var ALawCompressTable = [128]byte{
+	1, 1, 2, 2, 3, 3, 3, 3,
+	4, 4, 4, 4, 4, 4, 4, 4,
+	5, 5, 5, 5, 5, 5, 5, 5,
+	5, 5, 5, 5, 5, 5, 5, 5,
+	6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6,
+	6, 6, 6, 6, 6, 6, 6, 6,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+	7, 7, 7, 7, 7, 7, 7, 7,
+}
+
+func LinearToALawSample(sample int16) byte {
+	sign := byte((^sample)>>8) & 0x80
+	if sign == 0 {
+		sample = -sample
+	}
+
+	if sample > cClip {
+		sample = cClip
+	}
+
+	var compressedByte byte
+	if sample >= 256 {
+		exponent := ALawCompressTable[(sample>>8)&0x7F]
+		mantissa := byte(sample>>(exponent+3)) & 0x0F
+		compressedByte = (exponent << 4) | mantissa
+	} else {
+		compressedByte = byte(sample >> 4)
+	}
+	compressedByte ^= sign ^ 0x55
+	return compressedByte
+}
+
+var MuLawDecompressTable = [256]int16{
+	-32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956,
+	-23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764,
+	-15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412,
+	-11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316,
+	-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
+	-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
+	-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
+	-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
+	-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
+	-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
+	-876, -844, -812, -780, -748, -716, -684, -652,
+	-620, -588, -556, -524, -492, -460, -428, -396,
+	-372, -356, -340, -324, -308, -292, -276, -260,
+	-244, -228, -212, -196, -180, -164, -148, -132,
+	-120, -112, -104, -96, -88, -80, -72, -64,
+	-56, -48, -40, -32, -24, -16, -8, -1,
+	32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
+	23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
+	15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
+	11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
+	7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
+	5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
+	3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
+	2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
+	1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
+	1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
+	876, 844, 812, 780, 748, 716, 684, 652,
+	620, 588, 556, 524, 492, 460, 428, 396,
+	372, 356, 340, 324, 308, 292, 276, 260,
+	244, 228, 212, 196, 180, 164, 148, 132,
+	120, 112, 104, 96, 88, 80, 72, 64,
+	56, 48, 40, 32, 24, 16, 8, 0,
+}
+
+var ALawDecompressTable = [256]int16{
+	-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
+	-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
+	-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
+	-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
+	-22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944,
+	-30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136,
+	-11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472,
+	-15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568,
+	-344, -328, -376, -360, -280, -264, -312, -296,
+	-472, -456, -504, -488, -408, -392, -440, -424,
+	-88, -72, -120, -104, -24, -8, -56, -40,
+	-216, -200, -248, -232, -152, -136, -184, -168,
+	-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
+	-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
+	-688, -656, -752, -720, -560, -528, -624, -592,
+	-944, -912, -1008, -976, -816, -784, -880, -848,
+	5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
+	7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
+	2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
+	3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
+	22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
+	30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
+	11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
+	15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
+	344, 328, 376, 360, 280, 264, 312, 296,
+	472, 456, 504, 488, 408, 392, 440, 424,
+	88, 72, 120, 104, 24, 8, 56, 40,
+	216, 200, 248, 232, 152, 136, 184, 168,
+	1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
+	1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
+	688, 656, 752, 720, 560, 528, 624, 592,
+	944, 912, 1008, 976, 816, 784, 880, 848,
+}

pkg/pcm/v1/pcm_test.go

@@ -0,0 +1,39 @@
+package v1
+
+import (
+	v2 "github.com/AlexxIT/go2rtc/pkg/pcm"
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestPCMUtoPCM(t *testing.T) {
+	for pcmu := byte(0); pcmu < 255; pcmu++ {
+		pcm1 := MuLawDecompressTable[pcmu]
+		pcm2 := v2.PCMUtoPCM(pcmu)
+		require.Equal(t, pcm1, pcm2)
+	}
+}
+
+func TestPCMAtoPCM(t *testing.T) {
+	for pcma := byte(0); pcma < 255; pcma++ {
+		pcm1 := ALawDecompressTable[pcma]
+		pcm2 := v2.PCMAtoPCM(pcma)
+		require.Equal(t, pcm1, pcm2)
+	}
+}
+
+func TestPCMtoPCMU(t *testing.T) {
+	for pcm := int16(-32768); pcm < 32767; pcm++ {
+		pcmu1 := LinearToMuLawSample(pcm)
+		pcmu2 := v2.PCMtoPCMU(pcm)
+		require.Equal(t, pcmu1, pcmu2)
+	}
+}
+
+func TestPCMtoPCMA(t *testing.T) {
+	for pcm := int16(-32768); pcm < 32767; pcm++ {
+		pcma1 := LinearToALawSample(pcm)
+		pcma2 := v2.PCMtoPCMA(pcm)
+		require.Equal(t, pcma1, pcma2)
+	}
+}

pkg/rtsp/client.go

@@ -5,16 +5,19 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
-	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"net"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/tcp"
 )
 
+var Timeout = time.Second * 5
+
 func NewClient(uri string) *Conn {
 	return &Conn{uri: uri}
 }
@@ -28,10 +31,6 @@ func (c *Conn) Dial() (err error) {
 		c.URL.Host += ":554"
 	}
 
-	// remove UserInfo from URL
-	c.auth = tcp.NewAuth(c.URL.User)
-	c.URL.User = nil
-
 	c.conn, err = net.DialTimeout("tcp", c.URL.Host, time.Second*5)
 	if err != nil {
 		return
@@ -53,50 +52,24 @@ func (c *Conn) Dial() (err error) {
 		c.conn = tlsConn
 	}
 
+	// remove UserInfo from URL
+	c.auth = tcp.NewAuth(c.URL.User)
+	c.URL.User = nil
+
 	c.reader = bufio.NewReader(c.conn)
+	c.session = ""
 	c.state = StateConn
 
 	return nil
 }
 
-// Request sends only Request
+// Do send WriteRequest and receive and process WriteResponse
-func (c *Conn) Request(req *tcp.Request) error {
-	if req.Proto == "" {
-		req.Proto = ProtoRTSP
-	}
-
-	if req.Header == nil {
-		req.Header = make(map[string][]string)
-	}
-
-	c.sequence++
-	// important to send case sensitive CSeq
-	// https://github.com/AlexxIT/go2rtc/issues/7
-	req.Header["CSeq"] = []string{strconv.Itoa(c.sequence)}
-
-	c.auth.Write(req)
-
-	if c.Session != "" {
-		req.Header.Set("Session", c.Session)
-	}
-
-	if req.Body != nil {
-		val := strconv.Itoa(len(req.Body))
-		req.Header.Set("Content-Length", val)
-	}
-
-	c.Fire(req)
-
-	return req.Write(c.conn)
-}
-
-// Do send Request and receive and process Response
 func (c *Conn) Do(req *tcp.Request) (*tcp.Response, error) {
-	if err := c.Request(req); err != nil {
+	if err := c.WriteRequest(req); err != nil {
 		return nil, err
 	}
 
-	res, err := tcp.ReadResponse(c.reader)
+	res, err := c.ReadResponse()
 	if err != nil {
 		return nil, err
 	}
@@ -126,40 +99,6 @@ func (c *Conn) Do(req *tcp.Request) (*tcp.Response, error) {
 	return res, nil
 }
 
-func (c *Conn) Response(res *tcp.Response) error {
-	if res.Proto == "" {
-		res.Proto = ProtoRTSP
-	}
-
-	if res.Status == "" {
-		res.Status = "200 OK"
-	}
-
-	if res.Header == nil {
-		res.Header = make(map[string][]string)
-	}
-
-	if res.Request != nil && res.Request.Header != nil {
-		seq := res.Request.Header.Get("CSeq")
-		if seq != "" {
-			res.Header.Set("CSeq", seq)
-		}
-	}
-
-	if c.Session != "" {
-		res.Header.Set("Session", c.Session)
-	}
-
-	if res.Body != nil {
-		val := strconv.Itoa(len(res.Body))
-		res.Header.Set("Content-Length", val)
-	}
-
-	c.Fire(res)
-
-	return res.Write(c.conn)
-}
-
 func (c *Conn) Options() error {
 	req := &tcp.Request{Method: MethodOptions, URL: c.URL}
 
@@ -211,11 +150,18 @@ func (c *Conn) Describe() error {
 		}
 	}
 
-	c.Medias, err = UnmarshalSDP(res.Body)
+	medias, err := UnmarshalSDP(res.Body)
 	if err != nil {
 		return err
 	}
 
+	// TODO: rewrite more smart
+	if c.Medias == nil {
+		c.Medias = medias
+	} else if len(c.Medias) > len(medias) {
+		c.Medias = c.Medias[:len(medias)]
+	}
+
 	c.mode = core.ModeActiveProducer
 
 	return nil
@@ -242,33 +188,12 @@ func (c *Conn) Announce() (err error) {
 	return
 }
 
-func (c *Conn) Setup() error {
+func (c *Conn) SetupMedia(media *core.Media) (byte, error) {
-	for _, media := range c.Medias {
-		_, err := c.SetupMedia(media, true)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (c *Conn) SetupMedia(media *core.Media, first bool) (byte, error) {
-	// TODO: rewrite recoonection and first flag
-	if first {
-		c.stateMu.Lock()
-		defer c.stateMu.Unlock()
-	}
-
-	if c.state != StateConn && c.state != StateSetup {
-		return 0, fmt.Errorf("RTSP SETUP from wrong state: %s", c.state)
-	}
-
 	var transport string
 
 	// try to use media position as channel number
 	for i, m := range c.Medias {
-		if m.ID == media.ID {
+		if m.Equal(media) {
 			transport = fmt.Sprintf(
 				// i   - RTP (data channel)
 				// i+1 - RTCP (control channel)
@@ -303,37 +228,28 @@ func (c *Conn) SetupMedia(media *core.Media, first bool) (byte, error) {
 		},
 	}
 
-	var res *tcp.Response
+	res, err := c.Do(req)
-	res, err = c.Do(req)
 	if err != nil {
 		// some Dahua/Amcrest cameras fail here because two simultaneous
 		// backchannel connections
 		if c.Backchannel {
 			c.Backchannel = false
-			if err := c.Dial(); err != nil {
+			if err = c.Reconnect(); err != nil {
 				return 0, err
 			}
-			if err := c.Describe(); err != nil {
+			return c.SetupMedia(media)
-				return 0, err
-			}
-
-			for _, newMedia := range c.Medias {
-				if newMedia.ID == media.ID {
-					return c.SetupMedia(newMedia, false)
-				}
-			}
 		}
 
 		return 0, err
 	}
 
-	if c.Session == "" {
+	if c.session == "" {
 		// Session: 216525287999;timeout=60
 		if s := res.Header.Get("Session"); s != "" {
-			if j := strings.IndexByte(s, ';'); j > 0 {
+			c.session, s, _ = strings.Cut(s, ";timeout=")
-				s = s[:j]
+			if s != "" {
+				c.keepalive, _ = strconv.Atoi(s)
 			}
-			c.Session = s
 		}
 	}
 
@@ -351,8 +267,6 @@ func (c *Conn) SetupMedia(media *core.Media, first bool) (byte, error) {
 		}
 	}
 
-	c.state = StateSetup
-
 	channel := core.Between(transport, "interleaved=", "-")
 	i, err := strconv.Atoi(channel)
 	if err != nil {
@@ -363,36 +277,19 @@ func (c *Conn) SetupMedia(media *core.Media, first bool) (byte, error) {
 }
 
 func (c *Conn) Play() (err error) {
-	c.stateMu.Lock()
-	defer c.stateMu.Unlock()
-
-	if c.state != StateSetup {
-		return fmt.Errorf("RTSP PLAY from wrong state: %s", c.state)
-	}
-
 	req := &tcp.Request{Method: MethodPlay, URL: c.URL}
-	if err = c.Request(req); err == nil {
+	return c.WriteRequest(req)
-		c.state = StatePlay
-	}
-
-	return
 }
 
 func (c *Conn) Teardown() (err error) {
 	// allow TEARDOWN from any state (ex. ANNOUNCE > SETUP)
 	req := &tcp.Request{Method: MethodTeardown, URL: c.URL}
-	return c.Request(req)
+	return c.WriteRequest(req)
 }
 
 func (c *Conn) Close() error {
-	c.stateMu.Lock()
+	if c.mode == core.ModeActiveProducer {
-	defer c.stateMu.Unlock()
+		_ = c.Teardown()
-
-	if c.state == StateNone {
-		return nil
 	}
-
-	_ = c.Teardown()
-	c.state = StateNone
 	return c.conn.Close()
 }

pkg/rtsp/client_test.go

@@ -0,0 +1,94 @@
+package rtsp
+
+import (
+	"github.com/stretchr/testify/require"
+	"net"
+	"os"
+	"testing"
+	"time"
+)
+
+func TestTimeout(t *testing.T) {
+	Timeout = time.Millisecond
+
+	ln, err := net.Listen("tcp", "localhost:0")
+	require.Nil(t, err)
+
+	client := NewClient("rtsp://" + ln.Addr().String() + "/stream")
+	client.Backchannel = true
+
+	err = client.Dial()
+	require.Nil(t, err)
+
+	err = client.Describe()
+	require.ErrorIs(t, err, os.ErrDeadlineExceeded)
+}
+
+func TestMissedControl(t *testing.T) {
+	Timeout = time.Millisecond
+
+	ln, err := net.Listen("tcp", "localhost:0")
+	require.Nil(t, err)
+
+	go func() {
+		conn, err := ln.Accept()
+		require.Nil(t, err)
+
+		b := make([]byte, 8192)
+		for {
+			n, err := conn.Read(b)
+			require.Nil(t, err)
+
+			req := string(b[:n])
+
+			switch req[:4] {
+			case "DESC":
+				_, _ = conn.Write([]byte(`RTSP/1.0 200 OK
+Cseq: 1
+Content-Length: 495
+Content-Type: application/sdp
+
+v=0
+o=- 1 1 IN IP4 0.0.0.0
+s=go2rtc/1.2.0
+c=IN IP4 0.0.0.0
+t=0 0
+m=audio 0 RTP/AVP 96
+a=rtpmap:96 MPEG4-GENERIC/48000/2
+a=fmtp:96 profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3; config=119056E500
+m=audio 0 RTP/AVP 97
+a=rtpmap:97 OPUS/48000/2
+a=fmtp:97 sprop-stereo=1
+m=video 0 RTP/AVP 98
+a=rtpmap:98 H264/90000
+a=fmtp:98 packetization-mode=1; sprop-parameter-sets=Z2QAKaw0yAeAIn5cBagICAoAAAfQAAE4gdDAAjhAACOEF3lxoYAEcIAARwgu8uFA,aO48MAA=; profile-level-id=640029
+`))
+
+			case "SETU":
+				_, _ = conn.Write([]byte(`RTSP/1.0 200 OK
+Transport: RTP/AVP/TCP;unicast;interleaved=4-5
+Cseq: 3
+Session: 1
+
+`))
+
+			default:
+				t.Fail()
+			}
+		}
+	}()
+
+	client := NewClient("rtsp://" + ln.Addr().String() + "/stream")
+	client.Backchannel = true
+
+	err = client.Dial()
+	require.Nil(t, err)
+
+	err = client.Describe()
+	require.Nil(t, err)
+	require.Len(t, client.Medias, 3)
+
+	ch, err := client.SetupMedia(client.Medias[2], true)
+	require.Nil(t, err)
+	require.Equal(t, ch, byte(4))
+}

pkg/rtsp/conn.go

@@ -25,20 +25,22 @@ type Conn struct {
 	SessionName string
 
 	Medias    []*core.Media
-	Session   string
 	UserAgent string
 	URL       *url.URL
 
 	// internal
 
-	auth     *tcp.Auth
+	auth      *tcp.Auth
-	conn     net.Conn
+	conn      net.Conn
-	mode     core.Mode
+	keepalive int
-	state    State
+	mode      core.Mode
-	stateMu  sync.Mutex
+	reader    *bufio.Reader
-	reader   *bufio.Reader
+	sequence  int
-	sequence int
+	session   string
-	uri      string
+	uri       string
+
+	state   State
+	stateMu sync.Mutex
 
 	receivers []*core.Receiver
 	senders   []*core.Sender
@@ -68,13 +70,12 @@ func (s State) String() string {
 	case StateNone:
 		return "NONE"
 	case StateConn:
+
 		return "CONN"
 	case StateSetup:
-		return "SETUP"
+		return MethodSetup
 	case StatePlay:
-		return "PLAY"
+		return MethodPlay
-	case StateHandle:
-		return "HANDLE"
 	}
 	return strconv.Itoa(int(s))
 }
@@ -84,38 +85,24 @@ const (
 	StateConn
 	StateSetup
 	StatePlay
-	StateHandle
 )
 
 func (c *Conn) Handle() (err error) {
-	c.stateMu.Lock()
-
-	switch c.state {
-	case StateNone: // Close after PLAY and before Handle is OK (because SETUP after PLAY)
-	case StatePlay:
-		c.state = StateHandle
-	default:
-		err = fmt.Errorf("RTSP HANDLE from wrong state: %s", c.state)
-
-		c.state = StateNone
-		_ = c.conn.Close()
-	}
-
-	ok := c.state == StateHandle
-
-	c.stateMu.Unlock()
-
-	if !ok {
-		return
-	}
-
 	var timeout time.Duration
 
+	var keepaliveDT time.Duration
+	var keepaliveTS time.Time
+
 	switch c.mode {
 	case core.ModeActiveProducer:
-		// polling frames from remote RTSP Server (ex Camera)
+		if c.keepalive > 5 {
-		go c.keepalive()
+			keepaliveDT = time.Duration(c.keepalive-5) * time.Second
+		} else {
+			keepaliveDT = 25 * time.Second
+		}
+		keepaliveTS = time.Now().Add(keepaliveDT)
 
+		// polling frames from remote RTSP Server (ex Camera)
 		if len(c.receivers) > 0 {
 			// if we receiving video/audio from camera
 			timeout = time.Second * 5
@@ -137,7 +124,9 @@ func (c *Conn) Handle() (err error) {
 	}
 
 	for c.state != StateNone {
-		if err = c.conn.SetReadDeadline(time.Now().Add(timeout)); err != nil {
+		ts := time.Now()
+
+		if err = c.conn.SetReadDeadline(ts.Add(timeout)); err != nil {
 			return
 		}
 
@@ -158,7 +147,7 @@ func (c *Conn) Handle() (err error) {
 			switch string(buf4) {
 			case "RTSP":
 				var res *tcp.Response
-				if res, err = tcp.ReadResponse(c.reader); err != nil {
+				if res, err = c.ReadResponse(); err != nil {
 					return
 				}
 				c.Fire(res)
@@ -166,13 +155,15 @@ func (c *Conn) Handle() (err error) {
 
 			case "OPTI", "TEAR", "DESC", "SETU", "PLAY", "PAUS", "RECO", "ANNO", "GET_", "SET_":
 				var req *tcp.Request
-				if req, err = tcp.ReadRequest(c.reader); err != nil {
+				if req, err = c.ReadRequest(); err != nil {
 					return
 				}
 				c.Fire(req)
 				continue
 
 			default:
+				c.Fire("RTSP wrong input")
+
 				for i := 0; ; i++ {
 					// search next start symbol
 					if _, err = c.reader.ReadBytes('$'); err != nil {
@@ -204,8 +195,6 @@ func (c *Conn) Handle() (err error) {
 						return fmt.Errorf("RTSP wrong input")
 					}
 				}
-
-				c.Fire("RTSP wrong input")
 			}
 		} else {
 			// hope that the odd channels are always RTCP
@@ -254,21 +243,106 @@ func (c *Conn) Handle() (err error) {
 
 			c.Fire(msg)
 		}
+
+		if keepaliveDT != 0 && ts.After(keepaliveTS) {
+			req := &tcp.Request{Method: MethodOptions, URL: c.URL}
+			if err = c.WriteRequest(req); err != nil {
+				return
+			}
+
+			keepaliveTS = ts.Add(keepaliveDT)
+		}
 	}
 
 	return
 }
 
-func (c *Conn) keepalive() {
+func (c *Conn) WriteRequest(req *tcp.Request) error {
-	// TODO: rewrite to RTCP
+	if req.Proto == "" {
-	req := &tcp.Request{Method: MethodOptions, URL: c.URL}
+		req.Proto = ProtoRTSP
-	for {
+	}
-		time.Sleep(time.Second * 25)
+
-		if c.state == StateNone {
+	if req.Header == nil {
-			return
+		req.Header = make(map[string][]string)
-		}
+	}
-		if err := c.Request(req); err != nil {
+
-			return
+	c.sequence++
+	// important to send case sensitive CSeq
+	// https://github.com/AlexxIT/go2rtc/issues/7
+	req.Header["CSeq"] = []string{strconv.Itoa(c.sequence)}
+
+	c.auth.Write(req)
+
+	if c.session != "" {
+		req.Header.Set("Session", c.session)
+	}
+
+	if req.Body != nil {
+		val := strconv.Itoa(len(req.Body))
+		req.Header.Set("Content-Length", val)
+	}
+
+	c.Fire(req)
+
+	if err := c.conn.SetWriteDeadline(time.Now().Add(Timeout)); err != nil {
+		return err
+	}
+
+	return req.Write(c.conn)
+}
+
+func (c *Conn) ReadRequest() (*tcp.Request, error) {
+	if err := c.conn.SetReadDeadline(time.Now().Add(Timeout)); err != nil {
+		return nil, err
+	}
+	return tcp.ReadRequest(c.reader)
+}
+
+func (c *Conn) WriteResponse(res *tcp.Response) error {
+	if res.Proto == "" {
+		res.Proto = ProtoRTSP
+	}
+
+	if res.Status == "" {
+		res.Status = "200 OK"
+	}
+
+	if res.Header == nil {
+		res.Header = make(map[string][]string)
+	}
+
+	if res.Request != nil && res.Request.Header != nil {
+		seq := res.Request.Header.Get("CSeq")
+		if seq != "" {
+			res.Header.Set("CSeq", seq)
 		}
 	}
+
+	if c.session != "" {
+		if res.Request != nil && res.Request.Method == MethodSetup {
+			res.Header.Set("Session", c.session+";timeout=60")
+		} else {
+			res.Header.Set("Session", c.session)
+		}
+	}
+
+	if res.Body != nil {
+		val := strconv.Itoa(len(res.Body))
+		res.Header.Set("Content-Length", val)
+	}
+
+	c.Fire(res)
+
+	if err := c.conn.SetWriteDeadline(time.Now().Add(Timeout)); err != nil {
+		return err
+	}
+
+	return res.Write(c.conn)
+}
+
+func (c *Conn) ReadResponse() (*tcp.Response, error) {
+	if err := c.conn.SetReadDeadline(time.Now().Add(Timeout)); err != nil {
+		return nil, err
+	}
+	return tcp.ReadResponse(c.reader)
 }

pkg/rtsp/consumer.go

@@ -7,6 +7,7 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/h265"
 	"github.com/AlexxIT/go2rtc/pkg/mjpeg"
 	"github.com/pion/rtp"
+	"time"
 )
 
 func (c *Conn) GetMedias() []*core.Media {
@@ -28,10 +29,21 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 
 	switch c.mode {
 	case core.ModeActiveProducer: // backchannel
-		if channel, err = c.SetupMedia(media, true); err != nil {
+		c.stateMu.Lock()
+		defer c.stateMu.Unlock()
+
+		if c.state == StatePlay {
+			if err = c.Reconnect(); err != nil {
+				return
+			}
+		}
+
+		if channel, err = c.SetupMedia(media); err != nil {
 			return
 		}
 
+		c.state = StateSetup
+
 	case core.ModePassiveConsumer:
 		channel = byte(len(c.senders)) * 2
 
@@ -46,21 +58,22 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 
 	// save original codec to sender (can have Codec.Name = ANY)
 	sender := core.NewSender(media, codec)
-	sender.Handler = c.packetWriter(codec, channel)
+	// important to send original codec for valid IsRTP check
+	sender.Handler = c.packetWriter(track.Codec, channel, codec.PayloadType)
 	sender.HandleRTP(track)
 
 	c.senders = append(c.senders, sender)
 	return nil
 }
 
-func (c *Conn) packetWriter(codec *core.Codec, channel uint8) core.HandlerFunc {
+func (c *Conn) packetWriter(codec *core.Codec, channel, payloadType uint8) core.HandlerFunc {
 	handlerFunc := func(packet *rtp.Packet) {
 		if c.state == StateNone {
 			return
 		}
 
 		clone := *packet
-		clone.Header.PayloadType = codec.PayloadType
+		clone.Header.PayloadType = payloadType
 
 		size := clone.MarshalSize()
 
@@ -76,6 +89,10 @@ func (c *Conn) packetWriter(codec *core.Codec, channel uint8) core.HandlerFunc {
 			return
 		}
 
+		if err := c.conn.SetWriteDeadline(time.Now().Add(Timeout)); err != nil {
+			return
+		}
+
 		n, err := c.conn.Write(data)
 		if err != nil {
 			return

pkg/rtsp/helpers.go

@@ -2,13 +2,15 @@ package rtsp
 
 import (
 	"bytes"
-	"github.com/AlexxIT/go2rtc/pkg/core"
+	"io"
-	"github.com/pion/rtcp"
-	"github.com/pion/sdp/v3"
 	"net/url"
 	"regexp"
 	"strconv"
 	"strings"
+
+	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/pion/rtcp"
+	"github.com/pion/sdp/v3"
 )
 
 type RTCP struct {
@@ -23,12 +25,6 @@ s=-
 t=0 0`
 
 func UnmarshalSDP(rawSDP []byte) ([]*core.Media, error) {
-	// fix bug from Reolink Doorbell
-	if i := bytes.Index(rawSDP, []byte("a=sendonlym=")); i > 0 {
-		rawSDP = append(rawSDP[:i+11], rawSDP[i+10:]...)
-		rawSDP[i+10] = '\n'
-	}
-
 	sd := &sdp.SessionDescription{}
 	if err := sd.Unmarshal(rawSDP); err != nil {
 		// fix multiple `s=` https://github.com/AlexxIT/WebRTC/issues/417
@@ -38,10 +34,18 @@ func UnmarshalSDP(rawSDP []byte) ([]*core.Media, error) {
 		// fix SDP header for some cameras
 		if i := bytes.Index(rawSDP, []byte("\nm=")); i > 0 {
 			rawSDP = append([]byte(sdpHeader), rawSDP[i:]...)
-			sd = &sdp.SessionDescription{}
-			err = sd.Unmarshal(rawSDP)
 		}
 
+		// Fix invalid media type (errSDPInvalidValue) caused by
+		// some TP-LINK IP camera, e.g. TL-IPC44GW
+		rawSDP = bytes.ReplaceAll(rawSDP, []byte("m=application/TP-LINK "), []byte("m=application "))
+
+		if err == io.EOF {
+			rawSDP = append(rawSDP, '\n')
+		}
+
+		sd = &sdp.SessionDescription{}
+		err = sd.Unmarshal(rawSDP)
 		if err != nil {
 			return nil, err
 		}

pkg/rtsp/producer.go

@@ -2,7 +2,7 @@ package rtsp
 
 import (
 	"encoding/json"
-	"fmt"
+	"errors"
 	"github.com/AlexxIT/go2rtc/pkg/core"
 )
 
@@ -15,51 +15,86 @@ func (c *Conn) GetTrack(media *core.Media, codec *core.Codec) (*core.Receiver, e
 		}
 	}
 
-	switch c.state {
+	c.stateMu.Lock()
-	case StateConn, StateSetup:
+	defer c.stateMu.Unlock()
-	default:
+
-		return nil, fmt.Errorf("RTSP GetTrack from wrong state: %s", c.state)
+	if c.state == StatePlay {
+		if err := c.Reconnect(); err != nil {
+			return nil, err
+		}
 	}
 
-	channel, err := c.SetupMedia(media, true)
+	channel, err := c.SetupMedia(media)
 	if err != nil {
 		return nil, err
 	}
 
+	c.state = StateSetup
+
 	track := core.NewReceiver(media, codec)
-	track.ID = byte(channel)
+	track.ID = channel
 	c.receivers = append(c.receivers, track)
 
 	return track, nil
 }
 
-func (c *Conn) Start() error {
+func (c *Conn) Start() (err error) {
-	switch c.mode {
+	core.Assert(c.mode == core.ModeActiveProducer || c.mode == core.ModePassiveProducer)
-	case core.ModeActiveProducer:
+
-		if err := c.Play(); err != nil {
+	for {
-			return err
+		ok := false
+
+		c.stateMu.Lock()
+		switch c.state {
+		case StateNone:
+			err = nil
+		case StateConn:
+			err = errors.New("start from CONN state")
+		case StateSetup:
+			switch c.mode {
+			case core.ModeActiveProducer:
+				err = c.Play()
+			case core.ModePassiveProducer:
+				err = nil
+			default:
+				err = errors.New("start from wrong mode: " + c.mode.String())
+			}
+
+			if err == nil {
+				c.state = StatePlay
+				ok = true
+			}
 		}
-	case core.ModePassiveProducer:
+		c.stateMu.Unlock()
-	default:
-		return fmt.Errorf("start wrong mode: %d", c.mode)
-	}
 
-	if err := c.Handle(); c.state != StateNone {
+		if !ok {
-		_ = c.conn.Close()
+			return
-		return err
+		}
-	}
 
-	return nil
+		// Handler can return different states:
+		// 1. None after PLAY should exit without error
+		// 2. Play after PLAY should exit from Start with error
+		// 3. Setup after PLAY should Play once again
+		err = c.Handle()
+	}
 }
 
-func (c *Conn) Stop() error {
+func (c *Conn) Stop() (err error) {
 	for _, receiver := range c.receivers {
 		receiver.Close()
 	}
 	for _, sender := range c.senders {
 		sender.Close()
 	}
-	return c.Close()
+
+	c.stateMu.Lock()
+	if c.state != StateNone {
+		c.state = StateNone
+		err = c.Close()
+	}
+	c.stateMu.Unlock()
+
+	return
 }
 
 func (c *Conn) MarshalJSON() ([]byte, error) {
@@ -82,3 +117,32 @@ func (c *Conn) MarshalJSON() ([]byte, error) {
 
 	return json.Marshal(info)
 }
+
+func (c *Conn) Reconnect() error {
+	c.Fire("RTSP reconnect")
+
+	// close current session
+	_ = c.Close()
+
+	// start new session
+	if err := c.Dial(); err != nil {
+		return err
+	}
+	if err := c.Describe(); err != nil {
+		return err
+	}
+
+	// restore previous medias
+	for _, receiver := range c.receivers {
+		if _, err := c.SetupMedia(receiver.Media); err != nil {
+			return err
+		}
+	}
+	for _, sender := range c.senders {
+		if _, err := c.SetupMedia(sender.Media); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

pkg/rtsp/rtsp_test.go

@@ -1,10 +1,7 @@
 package rtsp
 
 import (
-	"github.com/AlexxIT/go2rtc/pkg/core"
-	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/stretchr/testify/assert"
-	"strings"
 	"testing"
 )
 
@@ -79,63 +76,34 @@ a=fmtp:96 packetization-mode=1;profile-level-id=64001F;sprop-parameter-sets=Z0IA
 
 func TestBugSDP3(t *testing.T) {
 	s := `v=0
-o=- 1675775048103026 1 IN IP4 192.168.1.123
+o=- 1680614126554766 1 IN IP4 192.168.0.3
 s=Session streamed by "preview"
 t=0 0
-a=tool:LIVE555 Streaming Media v2020.08.12
+a=tool:BC Streaming Media v202210012022.10.01
 a=type:broadcast
 a=control:*
-a=range:npt=0-
+a=range:npt=now-
 a=x-qt-text-nam:Session streamed by "preview"
 m=video 0 RTP/AVP 96
 c=IN IP4 0.0.0.0
 b=AS:8192
 a=rtpmap:96 H264/90000
+a=range:npt=now-
 a=fmtp:96 packetization-mode=1;profile-level-id=640033;sprop-parameter-sets=Z2QAM6wVFKAoAPGQ,aO48sA==
 a=recvonly
 a=control:track1
-m=audio 0 RTP/AVP 8
+m=audio 0 RTP/AVP 97
-a=control:track2
-a=rtpmap:8 PCMA/8000
-a=sendonlym=audio 0 RTP/AVP 98
 c=IN IP4 0.0.0.0
 b=AS:8192
-a=rtpmap:98 MPEG4-GENERIC/16000
+a=rtpmap:97 MPEG4-GENERIC/16000
-a=fmtp:98 streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408;
+a=fmtp:97 streamtype=5;profile-level-id=1;mode=AAC-hbr;sizelength=13;indexlength=3;indexdeltalength=3;config=1408;
 a=recvonly
+a=control:track2
+m=audio 0 RTP/AVP 8
 a=control:track3
-`
+a=rtpmap:8 PCMA/8000
+a=sendonly`
 	medias, err := UnmarshalSDP([]byte(s))
 	assert.Nil(t, err)
 	assert.Len(t, medias, 3)
 }
-
-func TestBugSDP4(t *testing.T) {
-	s := `v=0
-o=- 1676583297494652 1676583297494652 IN IP4 192.168.1.58
-s=Media Presentation
-e=NONE
-b=AS:5050
-t=0 0
-a=control:rtsp://192.168.1.58:554/h264_stream/
-m=video 0 RTP/AVP 96
-b=AS:5000
-a=control:rtsp://192.168.1.58:554/h264_stream/trackID=1
-a=rtpmap:96 H265/90000
-a=fmtp:96 profile-level-id=420029; packetization-mode=1; sprop-parameter-sets=
-a=Media_header:MEDIAINFO=494D4B48010100000400050000000000000000000000000000000000000000000000000000000000;
-a=appversion:1.0
-`
-	s = strings.ReplaceAll(s, "\n", "\r\n")
-	medias, err := UnmarshalSDP([]byte(s))
-	assert.Nil(t, err)
-
-	codec := medias[0].Codecs[0]
-	assert.Equal(t, core.CodecH264, codec.Name)
-
-	sps, _ := h264.GetParameterSet(codec.FmtpLine)
-	assert.Nil(t, sps)
-
-	profile := h264.GetProfileLevelID(codec.FmtpLine)
-	assert.Equal(t, "420029", profile)
-}

pkg/rtsp/server.go

@@ -8,6 +8,7 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/tcp"
 	"net"
 	"net/url"
+	"strconv"
 	"strings"
 )
 
@@ -25,7 +26,7 @@ func (c *Conn) Auth(username, password string) {
 
 func (c *Conn) Accept() error {
 	for {
-		req, err := tcp.ReadRequest(c.reader)
+		req, err := c.ReadRequest()
 		if err != nil {
 			return err
 		}
@@ -39,10 +40,11 @@ func (c *Conn) Accept() error {
 
 		if !c.auth.Validate(req) {
 			res := &tcp.Response{
-				Status: "401 Unauthorized",
+				Status:  "401 Unauthorized",
-				Header: map[string][]string{"Www-Authenticate": {`Basic realm="go2rtc"`}},
+				Header:  map[string][]string{"Www-Authenticate": {`Basic realm="go2rtc"`}},
+				Request: req,
 			}
-			if err = c.Response(res); err != nil {
+			if err = c.WriteResponse(res); err != nil {
 				return err
 			}
 			continue
@@ -58,7 +60,7 @@ func (c *Conn) Accept() error {
 				},
 				Request: req,
 			}
-			if err = c.Response(res); err != nil {
+			if err = c.WriteResponse(res); err != nil {
 				return err
 			}
 
@@ -83,7 +85,7 @@ func (c *Conn) Accept() error {
 			c.Fire(MethodAnnounce)
 
 			res := &tcp.Response{Request: req}
-			if err = c.Response(res); err != nil {
+			if err = c.WriteResponse(res); err != nil {
 				return err
 			}
 
@@ -96,7 +98,7 @@ func (c *Conn) Accept() error {
 					Status:  "404 Not Found",
 					Request: req,
 				}
-				return c.Response(res)
+				return c.WriteResponse(res)
 			}
 
 			res := &tcp.Response{
@@ -108,11 +110,12 @@ func (c *Conn) Accept() error {
 
 			// convert tracks to real output medias medias
 			var medias []*core.Media
-			for _, track := range c.senders {
+			for i, track := range c.senders {
 				media := &core.Media{
 					Kind:      core.GetKind(track.Codec.Name),
 					Direction: core.DirectionRecvonly,
 					Codecs:    []*core.Codec{track.Codec},
+					ID:        "trackID=" + strconv.Itoa(i),
 				}
 				medias = append(medias, media)
 			}
@@ -122,7 +125,7 @@ func (c *Conn) Accept() error {
 				return err
 			}
 
-			if err = c.Response(res); err != nil {
+			if err = c.WriteResponse(res); err != nil {
 				return err
 			}
 
@@ -136,27 +139,24 @@ func (c *Conn) Accept() error {
 
 			const transport = "RTP/AVP/TCP;unicast;interleaved="
 			if strings.HasPrefix(tr, transport) {
-				c.Session = "1" // TODO: fixme
+				c.session = core.RandString(8, 10)
 				c.state = StateSetup
 				res.Header.Set("Transport", tr[:len(transport)+3])
 			} else {
 				res.Status = "461 Unsupported transport"
 			}
 
-			if err = c.Response(res); err != nil {
+			if err = c.WriteResponse(res); err != nil {
 				return err
 			}
 
 		case MethodRecord, MethodPlay:
 			res := &tcp.Response{Request: req}
-			if err = c.Response(res); err == nil {
+			return c.WriteResponse(res)
-				c.state = StatePlay
-			}
-			return err
 
 		case MethodTeardown:
 			res := &tcp.Response{Request: req}
-			_ = c.Response(res)
+			_ = c.WriteResponse(res)
 			c.state = StateNone
 			return c.conn.Close()
 

pkg/webrtc/consumer.go

@@ -5,11 +5,12 @@ import (
 	"github.com/AlexxIT/go2rtc/pkg/core"
 	"github.com/AlexxIT/go2rtc/pkg/h264"
 	"github.com/AlexxIT/go2rtc/pkg/h265"
+	"github.com/AlexxIT/go2rtc/pkg/pcm"
 	"github.com/pion/rtp"
 )
 
 func (c *Conn) GetMedias() []*core.Media {
-	return c.medias
+	return WithResampling(c.medias)
 }
 
 func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiver) error {
@@ -31,15 +32,16 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 	}
 
 	localTrack := c.getTranseiver(media.ID).Sender().Track().(*Track)
+	payloadType := codec.PayloadType
 
-	sender := core.NewSender(media, track.Codec)
+	sender := core.NewSender(media, codec)
 	sender.Handler = func(packet *rtp.Packet) {
 		c.send += packet.MarshalSize()
 		//important to send with remote PayloadType
-		_ = localTrack.WriteRTP(codec.PayloadType, packet)
+		_ = localTrack.WriteRTP(payloadType, packet)
 	}
 
-	switch codec.Name {
+	switch track.Codec.Name {
 	case core.CodecH264:
 		sender.Handler = h264.RTPPay(1200, sender.Handler)
 		if track.Codec.IsRTP() {
@@ -55,6 +57,15 @@ func (c *Conn) AddTrack(media *core.Media, codec *core.Codec, track *core.Receiv
 		if track.Codec.IsRTP() {
 			sender.Handler = h265.RTPDepay(track.Codec, sender.Handler)
 		}
+
+	case core.CodecPCMA, core.CodecPCMU, core.CodecPCM:
+		if codec.ClockRate == 0 {
+			if codec.Name == core.CodecPCM {
+				codec.Name = core.CodecPCMA
+			}
+			codec.ClockRate = 8000
+			sender.Handler = pcm.Resample(track.Codec, 8000, sender.Handler)
+		}
 	}
 
 	sender.HandleRTP(track)

pkg/webrtc/helpers.go

@@ -52,6 +52,53 @@ func UnmarshalMedias(descriptions []*sdp.MediaDescription) (medias []*core.Media
 	return
 }
 
+func WithResampling(medias []*core.Media) []*core.Media {
+	for _, media := range medias {
+		if media.Kind != core.KindAudio || media.Direction != core.DirectionSendonly {
+			continue
+		}
+
+		var pcma, pcmu, pcm *core.Codec
+
+		for _, codec := range media.Codecs {
+			switch codec.Name {
+			case core.CodecPCMA:
+				if codec.ClockRate != 0 {
+					pcma = codec
+				} else {
+					pcma = nil
+				}
+			case core.CodecPCMU:
+				if codec.ClockRate != 0 {
+					pcmu = codec
+				} else {
+					pcmu = nil
+				}
+			case core.CodecPCM:
+				pcm = codec
+			}
+		}
+
+		if pcma != nil {
+			pcma = pcma.Clone()
+			pcma.ClockRate = 0 // reset clock rate so will match any
+			media.Codecs = append(media.Codecs, pcma)
+		}
+		if pcmu != nil {
+			pcmu = pcmu.Clone()
+			pcmu.ClockRate = 0
+			media.Codecs = append(media.Codecs, pcmu)
+		}
+		if pcma != nil && pcm == nil {
+			pcm = pcma.Clone()
+			pcm.Name = core.CodecPCM
+			media.Codecs = append(media.Codecs, pcm)
+		}
+	}
+
+	return medias
+}
+
 func NewCandidate(network, address string) (string, error) {
 	i := strings.LastIndexByte(address, ':')
 	if i < 0 {

www/links.html

@@ -67,12 +67,14 @@
 
             <h2>H264/H265 source</h2>
             <li><a href="stream.html?src=${src}&mode=webrtc">stream.html</a> WebRTC stream / browsers: all / codecs: H264, PCMU, PCMA, OPUS / +H265 in Safari</li>
-            <li><a href="stream.html?src=${src}&mode=mse">stream.html</a> MSE stream / browsers: Chrome, Firefox, Safari Mac/iPad / codecs: H264, H265*, AAC / +OPUS in Chrome and Firefox</li>
+            <li><a href="stream.html?src=${src}&mode=mse">stream.html</a> MSE stream / browsers: Chrome, Firefox, Safari Mac/iPad / codecs: H264, H265*, AAC, PCMA*, PCMU*, PCM* / +OPUS in Chrome and Firefox</li>
-            <li><a href="api/stream.mp4?src=${src}">stream.mp4</a> MP4 stream with AAC audio / browsers: Chrome, Firefox / codecs: H264, H265*, AAC</li>
+            <li><a href="api/stream.mp4?src=${src}">stream.mp4</a> legacy MP4 stream with AAC audio / browsers: Chrome, Firefox / codecs: H264, H265*, AAC</li>
-            <li><a href="api/stream.mp4?src=${src}&video=h264,h265&audio=aac,opus,mp3,pcma,pcmu">stream.mp4</a> MP4 stream with any audio / browsers: Chrome / codecs: H264, H265*, AAC, OPUS, MP3, PCMU, PCMA</li>
+            <li><a href="api/stream.mp4?src=${src}&mp4=flac">stream.mp4</a> modern MP4 stream with common audio / browsers: Chrome, Firefox / codecs: H264, H265*, AAC, FLAC (PCMA, PCMU, PCM)</li>
+            <li><a href="api/stream.mp4?src=${src}&mp4=all">stream.mp4</a> MP4 stream with any audio / browsers: Chrome / codecs: H264, H265*, AAC, OPUS, MP3, FLAC (PCMA, PCMU, PCM)</li>
             <li><a href="api/frame.mp4?src=${src}">frame.mp4</a> snapshot in MP4-format / browsers: all / codecs: H264, H265*</li>
-            <li><a href="api/stream.m3u8?src=${src}">stream.m3u8</a> HLS/TS / browsers: Safari all, Chrome Android / codecs: H264</li>
+            <li><a href="api/stream.m3u8?src=${src}">stream.m3u8</a> legacy HLS/TS / browsers: Safari all, Chrome Android / codecs: H264</li>
-            <li><a href="api/stream.m3u8?src=${src}&mp4">stream.m3u8</a> HLS/fMP4 / browsers: Safari all, Chrome Android / codecs: H264, H265*, AAC</li>
+            <li><a href="api/stream.m3u8?src=${src}&mp4">stream.m3u8</a> legacy HLS/fMP4 / browsers: Safari all, Chrome Android / codecs: H264, H265*, AAC</li>
+            <li><a href="api/stream.m3u8?src=${src}&mp4=flac">stream.m3u8</a> modern HLS/fMP4 / browsers: Safari all, Chrome Android / codecs: H264, H265*, AAC, FLAC (PCMA, PCMU, PCM)</li>
 
             <h2>MJPEG source</h2>
             <li><a href="stream.html?src=${src}&mode=mjpeg">stream.html</a> with MJPEG mode / browsers: all / codecs: MJPEG, JPEG</li>

www/video-rtc.js

@@ -27,7 +27,8 @@ export class VideoRTC extends HTMLElement {
             "hvc1.1.6.L153.B0", // H.265 main 5.1 (Chromecast Ultra)
             "mp4a.40.2",        // AAC LC
             "mp4a.40.5",        // AAC HE
-            "opus",             // OPUS Chrome
+            "flac",             // FLAC (PCM compatible)
+            "opus",             // OPUS Chrome, Firefox
         ];
 
         /**