// 处理系统信号
// 监听系统信号，重启或停止服务
func trapSignal(server client.Encoder) {
sch := make(chan os.Signal, 10)
signal.Notify(sch, syscall.SIGTERM, syscall.SIGKILL, syscall.SIGINT,
syscall.SIGHUP, syscall.SIGSTOP, syscall.SIGQUIT)
go func(ch <-chan os.Signal) {
sig := <-ch
server.Shutdown("signal recieved " + sig.String() + ", at: " + time.Now().String())
if sig == syscall.SIGHUP {
server.Info("autoencode restart now...")
procAttr := new(os.ProcAttr)
procAttr.Files = []*os.File{nil, os.Stdout, os.Stderr}
procAttr.Dir = os.Getenv("PWD")
procAttr.Env = os.Environ()
process, err := os.StartProcess(os.Args[0], os.Args, procAttr)
if err != nil {
server.Info("autoencode restart process failed:" + err.Error())
return
}
waitMsg, err := process.Wait()
if err != nil {
server.Info("autoencode restart wait error:" + err.Error())
}
server.Info(waitMsg)
} else {
server.Info("autoencode shutdown now...")
}
}(sch)
}
func (s *Session) Open(t int) *Error {
if s.IsOpen() {
return nil
}
s.Type = t
s.Args = s.BuildTranscodeCommand()
log.Printf("Opening transcoder session: %s", s.Args)
// create output directory structure
if err := s.createOutputDirectories(); err != nil {
return ErrorIO
}
// create pipe
pr, pw, err := os.Pipe()
if err != nil {
s.setState(TC_FAILED)
return ErrorTranscodeFailed
}
s.Pipe = pw
// create logfile
logname := s.c.Transcode.Log_path + "/" + s.idstr + ".log"
s.LogFile, _ = os.OpenFile(logname, os.O_WRONLY|os.O_CREATE|os.O_APPEND, utils.PERM_FILE)
// start transcode process
var attr os.ProcAttr
attr.Dir = s.c.Transcode.Output_path + "/" + s.idstr
attr.Files = []*os.File{pr, s.LogFile, s.LogFile}
s.Proc, err = os.StartProcess(s.c.Transcode.Command, strings.Fields(s.Args), &attr)
if err != nil {
log.Printf("Error starting process: %s", err)
s.setState(TC_FAILED)
pr.Close()
pw.Close()
s.LogFile.Close()
s.Pipe = nil
s.Type = 0
s.Args = ""
return ErrorTranscodeFailed
}
// close read-end of pipe and logfile after successful start
pr.Close()
s.LogFile.Close()
// set timeout for session cleanup
s.Timer = time.AfterFunc(time.Duration(s.c.Server.Session_timeout)*time.Second,
func() { s.HandleTimeout() })
// set state
s.setState(TC_RUNNING)
return nil
}
// 执行截图
func exec(url, pic, width, height, delay string) (string, error) {
if url == "" {
return "", errors.New("url is none.")
}
if width == "" {
width = strconv.Itoa(conf.width)
}
if height == "" {
height = strconv.Itoa(conf.height)
}
if delay == "" {
delay = strconv.Itoa(conf.delay)
}
procAttr := new(os.ProcAttr)
procAttr.Files = []*os.File{nil, os.Stdout, os.Stderr}
procAttr.Dir = os.Getenv("PWD")
procAttr.Env = os.Environ()
var args []string
args = make([]string, 7)
args[0] = PHANTOMJS
args[1] = conf.dir + "/" + SNAP_JS
args[2] = url
args[3] = pic
args[4] = delay
args[5] = width
args[6] = height
process, err := os.StartProcess(PHANTOMJS, args, procAttr)
if err != nil {
if conf.debug == true {
log.Println("PhantomJS start failed:" + err.Error())
}
return "", err
}
waitMsg, err := process.Wait()
if err != nil {
if conf.debug == true {
log.Println("PhantomJS start wait error:" + err.Error())
}
return "", err
}
if conf.debug == true {
log.Println(waitMsg)
}
return args[3], nil
}
func (t *TranscodeSession) Open() error {
if t.IsOpen() {
return nil
}
if err := t.createOutputDirectories(); err != nil {
log.Printf("Failed to create output directories: %s", err)
return err
}
// create pipe
pr, pw, err := os.Pipe()
if err != nil {
t.setState(TS_STATE_FAILED)
return err
}
t.Pipe = pw
// Start the transcode process
attr := os.ProcAttr{}
attr.Dir = filepath.Join(t.OutputDir, t.ID)
attr.Files = []*os.File{pr}
t.OutputFile = filepath.Join(t.OutputDir, t.ID, "index.m3u8")
t.Proc, err = os.StartProcess("/usr/local/bin/ffmpeg", strings.Fields(t.buildTranscodeCommand()), &attr)
if err != nil {
log.Printf("Error starting process: %s", err)
t.setState(TS_STATE_FAILED)
pr.Close()
pw.Close()
t.Pipe = nil
return err
}
// close the read-end fo the pipe after successful start
pr.Close()
// set state
t.setState(TS_STATE_RUNNING)
return nil
}
