Try to mux into RTP with FFMPEG bindings

go.mod

@@ -3,6 +3,7 @@ module gitlab.crans.org/nounous/ghostream
 go 1.13
 
 require (
+	github.com/3d0c/gmf v0.0.0-20200614092945-e58d8d5a6035
 	github.com/go-ldap/ldap/v3 v3.2.3
 	github.com/haivision/srtgo v0.0.0-20200731151239-e00427ae473a
 	github.com/markbates/pkger v0.17.1

go.sum

@@ -7,6 +7,8 @@ dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBr
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
+github.com/3d0c/gmf v0.0.0-20200614092945-e58d8d5a6035 h1:QZb1aMKxiYdGGieyIDmXuw9I9YcGWGViTrpQ6vcZX7Q=
+github.com/3d0c/gmf v0.0.0-20200614092945-e58d8d5a6035/go.mod h1:0QMRcUq2JsDECeAq7bj4h79k7XbhtTsrPUQf6G7qfPs=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c h1:/IBSNwUN8+eKzUzbJPqhK839ygXJ82sde8x3ogr6R28=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=

stream/webrtc/ingest.go

@@ -2,13 +2,14 @@
 package webrtc
 
 import (
+	"github.com/3d0c/gmf"
 	"github.com/pion/rtp"
 	"github.com/pion/webrtc/v3"
+	"gitlab.crans.org/nounous/ghostream/stream"
 	"log"
+	"net"
 	"strings"
 	"time"
-
-	"gitlab.crans.org/nounous/ghostream/stream"
 )
 
 var (
@@ -52,11 +53,63 @@ func ingest(name string, input *stream.Stream, audio *stream.Stream) {
 	audio.Register(audioInput)
 	activeStream[name] = struct{}{}
 
+	inputCtx := gmf.NewCtx()
+	avioInputCtx, _ := gmf.NewAVIOContext(inputCtx, &gmf.AVIOHandlers{ReadPacket: func() ([]byte, int) {
+		data := <-audioInput
+		return data, len(data)
+	}})
+	log.Println("Open input")
+	inputCtx.SetPb(avioInputCtx).OpenInput("")
+	log.Println("Opened")
+	defer inputCtx.CloseInput()
+	defer avioInputCtx.Release()
+
+	if audioTracks[name] == nil {
+		audioTracks[name] = make([]*webrtc.Track, 0)
+	}
+
+	udpListener, _ := net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: 1234})
+
+	outputCtx, _ := gmf.NewOutputCtxWithFormatName("rtp://127.0.0.1:1234", "rtp")
+	avioOutputCtx, _ := gmf.NewAVIOContext(outputCtx, &gmf.AVIOHandlers{WritePacket: func(data []byte) int {
+		n := len(data)
+		log.Printf("Read %d bytes", n)
+
+		return n
+	}})
+	// FIXME DON'T RAN AN UDP LISTENER, PLIZ GET DIRECTLY UDP PACKETS, WHY IS IT SO COMPLICATED????
+	// outputCtx.SetPb(avioOutputCtx)
+	defer outputCtx.CloseOutput()
+	defer avioOutputCtx.Release()
+
+	log.Printf("%d streams", inputCtx.StreamsCnt())
+
+	for i := 0; i < inputCtx.StreamsCnt(); i++ {
+		srcStream, err := inputCtx.GetStream(i)
+		if err != nil {
+			log.Println("GetStream error")
+		}
+
+		outputCtx.AddStreamWithCodeCtx(srcStream.CodecCtx())
+	}
+	outputCtx.Dump()
+
+	if err := outputCtx.WriteHeader(); err != nil {
+		log.Printf("Unable to write RTP header: %s", err)
+	}
+
 	// Receive audio data
 	go func() {
+		buff := make([]byte, 1500)
 		for {
+			n, _ := udpListener.Read(buff)
+
+			if n == 0 {
+				return
+			}
+
 			packet := &rtp.Packet{}
-			if err := packet.Unmarshal(<-audioInput); err != nil {
+			if err := packet.Unmarshal(buff[:n]); err != nil {
 				log.Printf("Failed to unmarshal RTP srtPacket: %s", err)
 				continue
 			}
@@ -78,6 +131,19 @@ func ingest(name string, input *stream.Stream, audio *stream.Stream) {
 		}
 	}()
 
+	first := false
+	for packet := range inputCtx.GetNewPackets() {
+		if first { //if read from rtsp ,the first packets is wrong.
+			if err := outputCtx.WritePacketNoBuffer(packet); err != nil {
+				log.Printf("Error while writing packet: %s", err)
+			}
+		}
+
+		first = true
+
+		packet.Free()
+	}
+
 	select {}
 
 	// TODO Register to all substreams and make RTP packets. Don't transcode in this package.

transcoder/audio/audio.go

@@ -4,9 +4,9 @@ package audio
 import (
 	"bufio"
 	"fmt"
+	"github.com/3d0c/gmf"
+	"io"
 	"log"
-	"math/rand"
-	"net"
 	"os/exec"
 	"strings"
 	"time"
@@ -63,15 +63,15 @@ func transcode(input, output *stream.Stream, cfg *Options) {
 	// Start ffmpeg to transcode video to audio
 	videoInput := make(chan []byte, 1024)
 	input.Register(videoInput)
-	ffmpeg, rawvideo, err := startFFmpeg(videoInput, cfg)
+	ffmpeg, audio, err := startFFmpeg(videoInput, cfg)
 	if err != nil {
 		log.Printf("Error while starting ffmpeg: %s", err)
 		return
 	}
 
-	dataBuff := make([]byte, 1316) // UDP MTU
+	dataBuff := make([]byte, gmf.IO_BUFFER_SIZE) // UDP MTU
 	for {
-		n, err := (*rawvideo).Read(dataBuff)
+		n, err := (*audio).Read(dataBuff)
 		if err != nil {
 			log.Printf("An error occurred while reading input: %s", err)
 			break
@@ -86,36 +86,36 @@ func transcode(input, output *stream.Stream, cfg *Options) {
 
 	// Stop transcode
 	_ = ffmpeg.Process.Kill()
-	_ = rawvideo.Close()
+	_ = (*audio).Close()
 }
 
 // Start a ffmpeg instance to convert stream into audio
-func startFFmpeg(in <-chan []byte, cfg *Options) (*exec.Cmd, *net.UDPConn, error) {
+func startFFmpeg(in <-chan []byte, cfg *Options) (*exec.Cmd, *io.ReadCloser, error) {
 	// TODO in a future release: remove FFMPEG dependency and transcode directly using the libopus API
 
 	// FIXME It seems impossible to get a RTP Packet from standard output.
 	// We need to find a clean solution, without waiting on UDP listeners.
 	// FIXME We should also not build RTP packets here.
 
-	port := 0
-	var udpListener *net.UDPConn
-	var err error
-	for {
-		port = rand.Intn(65535)
-		udpListener, err = net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: port})
-		if err != nil {
-			if strings.Contains(fmt.Sprintf("%s", err), "address already in use") {
-				continue
+	/*	port := 0
+		var udpListener *net.UDPConn
+		var err error
+		for {
+			port = rand.Intn(65535)
+			udpListener, err = net.ListenUDP("udp", &net.UDPAddr{IP: net.ParseIP("127.0.0.1"), Port: port})
+			if err != nil {
+				if strings.Contains(fmt.Sprintf("%s", err), "address already in use") {
+					continue
+				}
+				return nil, nil, err
 			}
-			return nil, nil, err
-		}
-		break
-	}
+			break
+		}*/
 
 	bitrate := fmt.Sprintf("%dk", cfg.Bitrate)
 	// Use copy audio codec, assume for now that libopus is used by the streamer
 	ffmpegArgs := []string{"-hide_banner", "-loglevel", "error", "-i", "pipe:0",
-		"-vn", "-c:a", "copy", "-b:a", bitrate, "-f", "rtp", fmt.Sprintf("rtp://127.0.0.1:%d", port)}
+		"-vn", "-c:a", "copy", "-b:a", bitrate, "-f", "mpegts", "pipe:1"}
 	ffmpeg := exec.Command("ffmpeg", ffmpegArgs...)
 
 	// Handle errors output
@@ -130,6 +130,12 @@ func startFFmpeg(in <-chan []byte, cfg *Options) (*exec.Cmd, *net.UDPConn, error
 		}
 	}()
 
+	// Handle text output
+	output, err := ffmpeg.StdoutPipe()
+	if err != nil {
+		return nil, nil, err
+	}
+
 	// Handle stream input
 	input, err := ffmpeg.StdinPipe()
 	if err != nil {
@@ -143,5 +149,5 @@ func startFFmpeg(in <-chan []byte, cfg *Options) (*exec.Cmd, *net.UDPConn, error
 
 	// Start process
 	err = ffmpeg.Start()
-	return ffmpeg, udpListener, err
+	return ffmpeg, &output, err
 }