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Code Issues Releases Wiki Activity

Use only one instance of FFPMEG per SRT stream instead of one per additional cast

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This commit is contained in:
Yohann D'ANELLO 2020-09-29 23:43:19 +02:00
parent 351870e92a
commit 9049935ee4
1 changed files with 51 additions and 52 deletions
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103
stream/multicast/muticast.go
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@ -13,8 +13,8 @@ type Options struct {
var (
options Options
ffmpegInstances = make(map[string][]*exec.Cmd)
ffmpegInputStreams = make(map[string][]*io.WriteCloser)
ffmpegInstances = make(map[string]*exec.Cmd)
ffmpegInputStreams = make(map[string]*io.WriteCloser)
)
// New Load configuration
@ -25,71 +25,70 @@ func New(cfg *Options) error {
// RegisterStream Declare a new open stream and create ffmpeg instances
func RegisterStream(streamKey string) {
ffmpegInstances[streamKey] = []*exec.Cmd{}
ffmpegInputStreams[streamKey] = []*io.WriteCloser{}
if len(options.Outputs[streamKey]) == 0 {
return
}
// TODO Export the list of multicasts
params := []string{"-re", "-i", "pipe:0"}
for _, stream := range options.Outputs[streamKey] {
// Launch FFMPEG instance
// TODO Set optimal parameters
ffmpeg := exec.Command("ffmpeg", "-re", "-i", "pipe:0", "-f", "flv", "-c:v", "libx264", "-preset",
params = append(params, "-f", "flv", "-c:v", "libx264", "-preset",
"veryfast", "-maxrate", "3000k", "-bufsize", "6000k", "-pix_fmt", "yuv420p", "-g", "50", "-c:a", "aac",
"-b:a", "160k", "-ac", "2", "-ar", "44100", stream)
// Open pipes
input, err := ffmpeg.StdinPipe()
if err != nil {
panic(err)
}
output, err := ffmpeg.StdoutPipe()
if err != nil {
panic(err)
}
errOutput, err := ffmpeg.StderrPipe()
if err != nil {
panic(err)
}
ffmpegInstances[streamKey] = append(ffmpegInstances[streamKey], ffmpeg)
ffmpegInputStreams[streamKey] = append(ffmpegInputStreams[streamKey], &input)
if err := ffmpeg.Start(); err != nil {
panic(err)
}
// Log ffmpeg output
go func() {
scanner := bufio.NewScanner(output)
for scanner.Scan() {
log.Println("[FFMPEG " + streamKey + "] " + scanner.Text())
}
}()
// Log also error output
go func() {
scanner := bufio.NewScanner(errOutput)
for scanner.Scan() {
log.Println("[FFMPEG ERROR " + streamKey + "] " + scanner.Text())
}
}()
}
// Launch FFMPEG instance
ffmpeg := exec.Command("ffmpeg", params...)
// Open pipes
input, err := ffmpeg.StdinPipe()
if err != nil {
panic(err)
}
output, err := ffmpeg.StdoutPipe()
if err != nil {
panic(err)
}
errOutput, err := ffmpeg.StderrPipe()
if err != nil {
panic(err)
}
ffmpegInstances[streamKey] = ffmpeg
ffmpegInputStreams[streamKey] = &input
if err := ffmpeg.Start(); err != nil {
panic(err)
}
// Log ffmpeg output
go func() {
scanner := bufio.NewScanner(output)
for scanner.Scan() {
log.Println("[FFMPEG " + streamKey + "] " + scanner.Text())
}
}()
// Log also error output
go func() {
scanner := bufio.NewScanner(errOutput)
for scanner.Scan() {
log.Println("[FFMPEG ERROR " + streamKey + "] " + scanner.Text())
}
}()
}
// SendPacket When a SRT packet is received, transmit it to all FFMPEG instances related to the stream key
func SendPacket(streamKey string, data []byte) {
for _, stdin := range ffmpegInputStreams[streamKey] {
_, err := (*stdin).Write(data)
if err != nil {
log.Println("Error while sending a packet to external streaming server for key "+streamKey, err)
}
stdin := ffmpegInputStreams[streamKey]
_, err := (*stdin).Write(data)
if err != nil {
log.Println("Error while sending a packet to external streaming server for key "+streamKey, err)
}
}
// CloseConnection When the stream is ended, close FFMPEG instances
func CloseConnection(streamKey string) {
for _, ffmpeg := range ffmpegInstances[streamKey] {
if err := ffmpeg.Process.Kill(); err != nil {
panic(err)
}
ffmpeg := ffmpegInstances[streamKey]
if err := ffmpeg.Process.Kill(); err != nil {
panic(err)
}
delete(ffmpegInstances, streamKey)
delete(ffmpegInputStreams, streamKey)