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