使用opencv统计视频库的总时长

统计视频库里的视频文件的总时长

废话不多说，直接上代码：

 /*
  * =====================================================================================
  *
  *       Filename:  count_the_vedeo_time.cpp
  *      Environment:
  *    Description:  用于计算视频文件列表里的视频文件各个时长及其总和，用于统计视频数据库的时长
  *
  *
  *        Version:  1.0
  *        Created:  2013/10/21 8:50:09
  *         Author:  yuliyang
 I*
  *             Mail:  wzyuliyang911@gmail.com
  *             Blog:  http://www.cnblogs.com/yuliyang
  *
  * =====================================================================================
  */

 #include <opencv2/core/core.hpp>
 #include <opencv2/highgui/highgui.hpp>
 #include <opencv2/imgproc/imgproc.hpp>
 #include <iostream>
 #include "fstream"

 using namespace std;
 using namespace cv;

 int main(int args,char* argv[])
 {
     string buf;
     ifstream svm_data(argv[]);                 /*读入视频文件列表  */
     ofstream result(argv[]);                   /* 保存结果文件 */
     double sum=;
     while (svm_data)
     {
         if (getline(svm_data,buf))
         {
             result<<"计算视频"<<buf.c_str()<<"的时长"<<endl;
             //打开视频文件：其实就是建立一个VideoCapture结构
             VideoCapture capture(buf.c_str());
             //检测是否正常打开:成功打开时，isOpened返回ture
             if(!capture.isOpened())
                 result<<"fail to open!"<<endl;
             //获取整个帧数
             double totalFrameNumber = capture.get(CV_CAP_PROP_FRAME_COUNT);
             //获取帧率
             double rate = capture.get(CV_CAP_PROP_FPS);

             double vedio_time= totalFrameNumber/rate;
             result<<"该个视频共"<<totalFrameNumber<<"帧,"<<"帧率为:"<<rate<<"该视频时长为："<<vedio_time<<" s"<<endl;
             capture.release();
             sum +=vedio_time;

         }
     }

     result<<"视频时长总和为："<<sum/<<"mins"<<endl;
     result.close();
     return ;
 }