/
transcoder.go
94 lines (81 loc) · 2.04 KB
/
transcoder.go
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package services
import (
"fmt"
"io"
"os"
"os/exec"
"syscall"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
type Transcoder struct {
cmd *exec.Cmd
h *HLSParser
out string
ch chan error
toCompletion bool
}
func NewTranscoder(c *cli.Context, h *HLSParser) *Transcoder {
return &Transcoder{
h: h,
ch: make(chan error),
toCompletion: c.Bool(ToCompletionFlag),
out: c.String(OutputFlag),
}
}
func (s *Transcoder) Close() error {
if s.cmd != nil {
syscall.Kill(-s.cmd.Process.Pid, syscall.SIGKILL)
}
close(s.ch)
return nil
}
func (s *Transcoder) Serve() (err error) {
ffmpeg, err := exec.LookPath("ffmpeg")
if err != nil {
return errors.Wrap(err, "Failed to find ffmpeg")
}
hls, err := s.h.Get()
if err != nil {
return errors.Wrap(err, "Failed to get hls")
}
params, err := hls.GetFFmpegParams()
if err != nil {
return errors.Wrap(err, "Failed to get ffmpeg params")
}
err = hls.MakeMasterPlaylist()
if err != nil {
return errors.Wrap(err, "Failed to make master playlist")
}
log.Infof("Got ffmpeg params %-v", params)
s.cmd = exec.Command(ffmpeg, params...)
outLog, err := os.Create(fmt.Sprintf("%v/%v", s.out, "ffmpeg.out"))
if err != nil {
return errors.Wrapf(err, "Failed create %v", fmt.Sprintf("%v/%v", s.out, "ffmpeg.out"))
}
defer outLog.Close()
errLog, err := os.Create(fmt.Sprintf("%v/%v", s.out, "ffmpeg.err"))
if err != nil {
return errors.Wrapf(err, "Failed create %v", fmt.Sprintf("%v/%v", s.out, "ffmpeg.out"))
}
defer errLog.Close()
s.cmd.Stdout = io.MultiWriter(os.Stdout, outLog)
s.cmd.Stderr = io.MultiWriter(os.Stderr, errLog)
s.cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
err = s.cmd.Start()
if err != nil {
return errors.Wrap(err, "Failed to start ffmpeg")
}
log.Info("Starting Transcoder")
err = s.cmd.Wait()
if err != nil {
return errors.Wrap(err, "Failed to transcode")
}
log.Info("Transcoding finished")
if s.toCompletion {
return nil
}
<-s.ch
return nil
}