Ffmpeg gets different args for mjpeg encoding

device/webcam/webcam.go

@@ -114,9 +114,13 @@ func (w *Webcam) Set(c config.Config) error {
 // Start will build the required arguments for ffmpeg and then execute the
 // command, piping video output where we can read using the Read method.
 func (w *Webcam) Start() error {
+	br := w.cfg.Bitrate * 1000
+
 	args := []string{
 		"-i", w.cfg.InputPath,
 		"-r", fmt.Sprint(w.cfg.FrameRate),
+		"-b:v", fmt.Sprint(br),
+		"-s", fmt.Sprintf("%dx%d", w.cfg.Width, w.cfg.Height),
 	}	
 
 	switch w.cfg.InputCodec {
@@ -125,6 +129,8 @@ func (w *Webcam) Start() error {
 	case codecutil.H264:
 		args = append(args,
 			"-f", "h264",
+			"-maxrate", fmt.Sprint(br),
+			"-bufsize", fmt.Sprint(br/2),
 		)
 	case codecutil.MJPEG:
 		args = append(args,
@@ -132,17 +138,11 @@ func (w *Webcam) Start() error {
 		)
 	}
 
-	br := w.cfg.Bitrate * 1000
 	args = append(args,
-		"-b:v", fmt.Sprint(br),
-		"-maxrate", fmt.Sprint(br),
-		"-bufsize", fmt.Sprint(br/2),
-		"-s", fmt.Sprintf("%dx%d", w.cfg.Width, w.cfg.Height),
 		"-",
 	)
 
 	w.log.Log(logger.Info, pkg+"ffmpeg args", "args", strings.Join(args, " "))
-	fmt.Printf("%v", args) // !!!!
 	w.cmd = exec.Command("ffmpeg", args...)
 
 	var err error