gistfile1.txt

func exifTool(input io.Reader) (*ExifProperties, error) {
	cmd := exec.Command("exiftool", "-json", "-")
	cmd.Stdin = input
	var out bytes.Buffer
	cmd.Stdout = &out
	err := cmd.Run()
	if err != nil {
		return nil, err
	}
	data := []ExifProperties{}
	json.Unmarshal(out.Bytes(), &data)
	meta := &data[0]
	return meta, nil
}