java 获取视频时间

//先将视频保存到项目生成临时文件，获取时长后删除临时文件    
// 使用fastdfs进行文件上传
    @RequestMapping("/uploadVideoToFast")
    @ResponseBody
    public Map<String, Object> uploadVideoToFast(@RequestParam("file") MultipartFile file)
            throws IOException, InterruptedException {
        File toFile = null;

        InputStream ins = null;
        ins = file.getInputStream();
        toFile = new File(file.getOriginalFilename());
        inputStreamToFile(ins, toFile);
        ins.close();

        String length = ReadVideoTime(toFile);
        Map<String, Object> url = UploadVideoDemo.testUploadStream(accessKeyId, accessKeySecret, "视频",
                file.getOriginalFilename(), file.getInputStream());
        url.put("length", length);
        return url;
    }

    private String ReadVideoTime(File source) throws InterruptedException {
        Encoder encoder = new Encoder();
        String length = "";
        try {
            MultimediaInfo m = encoder.getInfo(source);
            long ls = m.getDuration() / ;
            int hour = (int) (ls / );
            int minute = (int) (ls % ) / ;
            int second = (int) (ls - hour *  - minute * );
            length = hour + ":" + minute + ":" + second;
        } catch (Exception e) {
            e.printStackTrace();
        }
        Thread.sleep();
        System.out.println(source.getAbsolutePath());
        System.out.println(source.getPath());
        System.out.println(length);
        System.out.println(source.delete());
        return length;
    }

    public static void inputStreamToFile(InputStream ins, File file) {
        try {
            OutputStream os = new FileOutputStream(file);
            int bytesRead = ;
            byte[] buffer = new byte[];
            while ((bytesRead = ins.read(buffer, , )) != -) {
                os.write(buffer, , bytesRead);
            }
            os.close();
            ins.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }