java读取视频文件时长

1.下载jar包：http://www.sauronsoftware.it/projects/jave/index.php

2.上代码  

    @RequestMapping(value = "amendFile.htm", produces = "application/json;charset=UTF-8")
    @ResponseBody
    public String amendFile(MultipartFile file, HttpServletRequest request,
            HttpServletResponse response, String equid,String begintime,String endtime) {
        log.info(this.getClass().getSimpleName() + "."
                + Thread.currentThread().getStackTrace()[1].getMethodName()
                + "()----start");
        
        String path =  request.getSession().getServletContext()
                .getRealPath("/")+"resources/"+equid+"/"+begintime.substring(0,begintime.length()-6)+"/";
        // 通过文件ID 获取文件存储路径
        if (file.isEmpty()) {
            return "empty";
        }
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            /* 写入文件 */
            File targetFile = new File(path, file.getOriginalFilename());
            if (!targetFile.exists()) {
                targetFile.mkdirs();
            }
            file.transferTo(targetFile); // 转储 
            Encoder encoder = new Encoder(); 
            // zp add 读取视频时长 2017-07-31
            try {
                 MultimediaInfo m = encoder.getInfo(targetFile);
                 long ls = m.getDuration(); 
                 ls = Math.round((double)ls/1000); 
                 map.put("timeLength", Math.round(ls));
            } catch (Exception e) {
                e.printStackTrace();
            } 
            // 读取视频时长结束  2017-07-31
            response.addHeader("Access-Control-Allow-Origin", "*");
            if(targetFile.exists()){
                
                map.put("success", "success");
                ObjectMapper mapper = new ObjectMapper();
                String content = mapper.writeValueAsString(map);
                return content;
            }else{
                map.put("error", "error");
                ObjectMapper mapper = new ObjectMapper();
                String content = mapper.writeValueAsString(map);
                return content;
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        log.info(this.getClass().getSimpleName() + "."
                + Thread.currentThread().getStackTrace()[1].getMethodName()
                + "()----end");
        return "success";
    } 

其中最重要的代码就是：

 // zp add 读取视频时长 2017-07-31
            try {
                 MultimediaInfo m = encoder.getInfo(targetFile);
                 long ls = m.getDuration(); 
                 ls = Math.round((double)ls/1000); 
                 map.put("timeLength", Math.round(ls));
            } catch (Exception e) {
                e.printStackTrace();
            } 
            // 读取视频时长结束  2017-07-31