code: def open_camera(
          self, input_source: str, extra_cmd: Optional[str] = None
      ) -> Coroutine:
          
          command = ["-an", "-c:v", "mjpeg"]
  
          return self.open(
              cmd=command,
              input_source=input_source,
              output="-f mpjpeg -",
              extra_cmd=extra_cmd,
          )
docs: Open FFmpeg process as mjpeg video stream.
  
          Return A coroutine.