101 lines
2.2 KiB
Go
101 lines
2.2 KiB
Go
package forwarding
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import (
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"bufio"
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"io"
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"log"
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"os/exec"
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)
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// Options to configure the stream forwarding.
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// For each stream name, user can provide several URL to forward stream to
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type Options map[string][]string
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var (
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cfg Options
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ffmpegInstances = make(map[string]*exec.Cmd)
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ffmpegInputStreams = make(map[string]*io.WriteCloser)
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)
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// New Load configuration
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func New(c Options) {
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cfg = c
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log.Printf("Stream forwarding initialized")
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}
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// RegisterStream Declare a new open stream and create ffmpeg instances
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func RegisterStream(name string) error {
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streams, exist := cfg[name]
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if !exist || len(streams) == 0 {
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// Nothing to do, not configured
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return nil
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}
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// Launch FFMPEG instance
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params := []string{"-re", "-i", "pipe:0"}
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for _, stream := range streams {
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params = append(params, "-f", "flv", "-preset", "ultrafast", "-tune", "zerolatency",
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"-c", "copy", stream)
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}
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ffmpeg := exec.Command("ffmpeg", params...)
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// Open pipes
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input, err := ffmpeg.StdinPipe()
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if err != nil {
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return err
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}
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output, err := ffmpeg.StdoutPipe()
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if err != nil {
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return err
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}
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errOutput, err := ffmpeg.StderrPipe()
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if err != nil {
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return err
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}
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ffmpegInstances[name] = ffmpeg
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ffmpegInputStreams[name] = &input
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// Start FFMpeg
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if err := ffmpeg.Start(); err != nil {
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return err
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}
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// Log ffmpeg output
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go func() {
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scanner := bufio.NewScanner(output)
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for scanner.Scan() {
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log.Printf("[FFMPEG %s] %s", name, scanner.Text())
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}
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}()
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// Log also error output
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go func() {
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scanner := bufio.NewScanner(errOutput)
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for scanner.Scan() {
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log.Printf("[FFMPEG ERR %s] %s", name, scanner.Text())
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}
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}()
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return nil
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}
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// SendPacket forward data to all FFMpeg instances related to the stream name
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func SendPacket(name string, data []byte) {
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stdin := ffmpegInputStreams[name]
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_, err := (*stdin).Write(data)
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if err != nil {
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log.Printf("Error while sending a packet to external streaming server for key %s: %s", name, err)
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}
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}
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// CloseConnection When the stream is ended, close FFMPEG instances
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func CloseConnection(name string) error {
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ffmpeg := ffmpegInstances[name]
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if err := ffmpeg.Process.Kill(); err != nil {
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return err
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}
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delete(ffmpegInstances, name)
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delete(ffmpegInputStreams, name)
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return nil
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}
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