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

 1     @RequestMapping(value = "amendFile.htm", produces = "application/json;charset=UTF-8")
 2     @ResponseBody
 3     public String amendFile(MultipartFile file, HttpServletRequest request,
 4             HttpServletResponse response, String equid,String begintime,String endtime) {
 5         log.info(this.getClass().getSimpleName() + "."
 6                 + Thread.currentThread().getStackTrace()[1].getMethodName()
 7                 + "()----start");
 8
 9         String path =  request.getSession().getServletContext()
10                 .getRealPath("/")+"resources/"+equid+"/"+begintime.substring(0,begintime.length()-6)+"/";
11         // 通过文件ID 获取文件存储路径
12         if (file.isEmpty()) {
13             return "empty";
14         }
15         Map<String, Object> map = new HashMap<String, Object>();
16         try {
17             /* 写入文件 */
18             File targetFile = new File(path, file.getOriginalFilename());
19             if (!targetFile.exists()) {
20                 targetFile.mkdirs();
21             }
22             file.transferTo(targetFile); // 转储
23             Encoder encoder = new Encoder();
24             // zp add 读取视频时长 2017-07-31
25             try {
26                  MultimediaInfo m = encoder.getInfo(targetFile);
27                  long ls = m.getDuration();
28                  ls = Math.round((double)ls/1000);
29                  map.put("timeLength", Math.round(ls));
30             } catch (Exception e) {
31                 e.printStackTrace();
32             }
33             // 读取视频时长结束  2017-07-31
34             response.addHeader("Access-Control-Allow-Origin", "*");
35             if(targetFile.exists()){
36
37                 map.put("success", "success");
38                 ObjectMapper mapper = new ObjectMapper();
39                 String content = mapper.writeValueAsString(map);
40                 return content;
41             }else{
42                 map.put("error", "error");
43                 ObjectMapper mapper = new ObjectMapper();
44                 String content = mapper.writeValueAsString(map);
45                 return content;
46             }
47
48         } catch (Exception e) {
49             e.printStackTrace();
50         }
51         log.info(this.getClass().getSimpleName() + "."
52                 + Thread.currentThread().getStackTrace()[1].getMethodName()
53                 + "()----end");
54         return "success";
55     } 

其中最重要的代码就是：

 1  // zp add 读取视频时长 2017-07-31
 2             try {
 3                  MultimediaInfo m = encoder.getInfo(targetFile);
 4                  long ls = m.getDuration();
 5                  ls = Math.round((double)ls/1000);
 6                  map.put("timeLength", Math.round(ls));
 7             } catch (Exception e) {
 8                 e.printStackTrace();
 9             }
10             // 读取视频时长结束  2017-07-31