Init
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241
streamer/streamer.go
Normal file
241
streamer/streamer.go
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@@ -0,0 +1,241 @@
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package streamer
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import (
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"bufio"
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"fmt"
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"io"
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"live-streamer/config"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"sync"
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"time"
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)
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type Streamer struct {
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playlist []config.InputItem
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currentVideoIndex int
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cmd *exec.Cmd
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stopped bool
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logFile *os.File
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doneCh chan bool
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mu sync.Mutex
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manualNext bool
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}
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func NewStreamer(playList []config.InputItem) *Streamer {
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logDir := "logs"
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if err := os.MkdirAll(logDir, 0755); err != nil {
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log.Printf("Error creating log directory: %v\n", err)
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}
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logPath := filepath.Join(logDir, fmt.Sprintf("ffmpeg_%s.log", time.Now().Format("2006-01-02_15-04-05")))
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logFile, err := os.OpenFile(logPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
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if err != nil {
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log.Fatalf("Error opening log file: %v\n", err)
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}
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return &Streamer{
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playlist: playList,
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currentVideoIndex: 0,
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cmd: nil,
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logFile: logFile,
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doneCh: make(chan bool, 1),
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}
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}
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func (s *Streamer) Add(videoPath string) {
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s.playlist = append(s.playlist, config.InputItem{Path: videoPath})
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}
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func (s *Streamer) Remove(videoPath string) {
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for i, item := range s.playlist {
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if item.Path == videoPath {
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s.playlist = append(s.playlist[:i], s.playlist[i+1:]...)
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if s.currentVideoIndex >= len(s.playlist) {
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s.currentVideoIndex = 0
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}
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if s.currentVideoIndex == i {
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s.start()
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}
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break
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}
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}
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}
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func (s *Streamer) Prev() {
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s.currentVideoIndex--
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if s.currentVideoIndex < 0 {
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s.currentVideoIndex = len(s.playlist) - 1
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}
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s.start()
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}
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func (s *Streamer) Next() {
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s.manualNext = true
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s.currentVideoIndex++
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if s.currentVideoIndex >= len(s.playlist) {
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s.currentVideoIndex = 0
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}
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s.start()
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}
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func (s *Streamer) Stream() {
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for {
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if len(s.playlist) == 0 {
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time.Sleep(time.Second)
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continue
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}
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if s.currentVideoIndex >= len(s.playlist) {
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s.currentVideoIndex = 0
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}
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s.start()
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}
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}
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func (s *Streamer) buildFFmpegArgs(videoItem config.InputItem) []string {
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videoPath := videoItem.Path
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args := []string{"-re"}
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if videoItem.Start != "" {
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args = append(args, "-ss", videoItem.Start)
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}
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args = append(args, "-i", videoPath)
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if videoItem.End != "" {
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args = append(args, "-to", videoItem.End)
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}
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args = append(args,
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"-c:v", config.GlobalConfig.Play.VideoCodec,
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"-preset", config.GlobalConfig.Play.Preset,
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"-crf", fmt.Sprintf("%d", config.GlobalConfig.Play.CRF),
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"-maxrate", config.GlobalConfig.Play.MaxRate,
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"-bufsize", config.GlobalConfig.Play.BufSize,
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"-vf", fmt.Sprintf("scale=%s", config.GlobalConfig.Play.Scale),
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"-r", fmt.Sprintf("%d", config.GlobalConfig.Play.FrameRate),
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"-c:a", config.GlobalConfig.Play.AudioCodec,
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"-b:a", config.GlobalConfig.Play.AudioBitrate,
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"-ar", fmt.Sprintf("%d", config.GlobalConfig.Play.AudioSampleRate),
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"-f", config.GlobalConfig.Play.OutputFormat,
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"-stats", "-loglevel", "info",
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)
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if config.GlobalConfig.Play.CustomArgs != "" {
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customArgs := strings.Fields(config.GlobalConfig.Play.CustomArgs)
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args = append(args, customArgs...)
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}
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args = append(args, fmt.Sprintf("%s/%s", config.GlobalConfig.Output.RTMPServer, config.GlobalConfig.Output.StreamKey))
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// log.Println("ffmpeg args: ", args)
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return args
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}
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func (s *Streamer) start() {
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defer func() {
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s.cmd = nil
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}()
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if s.cmd != nil && !s.stopped {
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s.Stop()
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}
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s.mu.Lock()
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s.stopped = false
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s.mu.Unlock()
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currentVideo := s.playlist[s.currentVideoIndex]
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videoPath := currentVideo.Path
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log.Println("start stream: ", videoPath)
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s.cmd = exec.Command("ffmpeg", s.buildFFmpegArgs(currentVideo)...)
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pipe, err := s.cmd.StderrPipe()
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if err != nil {
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log.Printf("failed to get pipe: %v", err)
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return
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}
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reader := bufio.NewReader(pipe)
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writer := bufio.NewWriter(s.logFile)
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if err := s.cmd.Start(); err != nil {
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log.Printf("starting ffmpeg error: %v\n", err)
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return
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}
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go func() {
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defer func() {
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if s.logFile != nil {
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if err := s.logFile.Sync(); err != nil {
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log.Printf("syncing log file error: %v\n", err)
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}
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}
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}()
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buf := make([]byte, 1024)
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for {
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n, err := reader.Read(buf)
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if err != nil {
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if err != io.EOF && !s.stopped {
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log.Printf("reading ffmpeg error: %v\n", err)
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}
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break
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}
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if n > 0 {
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timestamp := time.Now().Format("2006-01-02 15:04:05")
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logLine := fmt.Sprintf("[%s] %s", timestamp, string(buf[:n]))
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if s.logFile != nil {
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if _, err := writer.WriteString(logLine); err != nil {
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log.Printf("writing to log file error: %v\n", err)
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}
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if err := writer.Flush(); err != nil {
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log.Printf("flushing writer error: %v\n", err)
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}
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}
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}
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}
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}()
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go func() {
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err = s.cmd.Wait()
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s.doneCh <- true
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s.mu.Lock()
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defer s.mu.Unlock()
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if err != nil && !s.stopped {
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log.Printf("ffmpeg streaming error: %v\nStart streaming next video\n", err)
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s.Next()
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} else {
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log.Println("ffmpeg streaming stopped")
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if !s.manualNext {
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s.Next()
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}
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}
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}()
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<-s.doneCh
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}
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func (s *Streamer) Stop() {
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if s.cmd != nil && s.cmd.Process != nil {
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s.stopped = true
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_ = s.cmd.Process.Kill()
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<-s.doneCh
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s.cmd = nil
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}
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}
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func (s *Streamer) GetCurrentVideo() string {
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return s.playlist[s.currentVideoIndex].Path
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}
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func (s *Streamer) GetPlaylist() []config.InputItem {
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return s.playlist
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}
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func (s *Streamer) Close() {
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if s.logFile != nil {
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s.logFile.Close()
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s.logFile = nil
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}
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}
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