addStreamInputOptions() {
    const { conf, command } = this;
    const size = conf.getWH('x');
    const fps = conf.getVal('fps');
    const type = conf.getVal('cacheFormat');

    const opts = ['-framerate', fps];
    // raw (unencoded data in BGRA order on little-endian (most) systems, ARGB on big-endian systems; top-to-bottom)
    const newOpts =
      type === 'raw'
        ? ['-s', size, '-vcodec', 'rawvideo', '-pixel_format', 'bgra', '-video_size', size]
        : [];

    command.inputOptions(opts.concat(newOpts));
  }
Add input options for image input stream
@private