ffmpeg获取视频时长

/**
     * 获取视频时长
     *
     * @param fileId
     * @return
     */
    private Integer getFileDuration(String fileId) {
      String ffmpeg_path = "D:\\soft\\ffmpeg.exe";
      String video_path = "D:\\3708579e857a68b7654eb08df19214f6.mp4";
        List<String> commands = new java.util.ArrayList<>();
        commands.add(ffmpegPath);
        commands.add("-i");
        commands.add(video_path);
        try {
            ProcessBuilder builder = new ProcessBuilder();
            builder.command(commands);
            final Process p = builder.start();

            //从输入流中读取视频信息
            BufferedReader br = new BufferedReader(new InputStreamReader(p.getErrorStream()));
            StringBuffer sb = new StringBuffer();
            String line = "";
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            br.close();

            //从视频信息中解析时长
            String regexDuration = "Duration: (.*?), start: (.*?), bitrate: (\\d*) kb\\/s";
            Pattern pattern = Pattern.compile(regexDuration);
            Matcher m = pattern.matcher(sb.toString());
            if (m.find()) {
                int time = getTimelen(m.group(1));
                logger.info(video_path+",视频时长："+time+", 开始时间："+m.group(2)+",比特率："+m.group(3)+"kb/s");
                return time;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return 0;
    }

    //格式:"00:00:10.68"
    private static int getTimelen(String timelen){
        int min=0;
        String strs[] = timelen.split(":");
        if (strs[0].compareTo("0") > 0) {
            min+=Integer.valueOf(strs[0])*60*60;//秒
        }
        if(strs[1].compareTo("0")>0){
            min+=Integer.valueOf(strs[1])*60;
        }
        if(strs[2].compareTo("0")>0){
            min+=Math.round(Float.valueOf(strs[2]));
        }
        return min;
    }