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：
1 /* 2 * ===================================================================================== 3 * 4 * Filename: count_the_vedeo_time.cpp 5 * Environment: 6 * 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 7 * 8 * 9 * Version: 1.0 10 * Created: 2013/10/21 8:50:09 11 * Author: yuliyang 12 I* 13 * Mail: wzyuliyang911@gmail.com 14 * Blog: http://www.cnblogs.com/yuliyang 15 * 16 * ===================================================================================== 17 */ 18 19 #include <opencv2/core/core.hpp> 20 #include <opencv2/highgui/highgui.hpp> 21 #include <opencv2/imgproc/imgproc.hpp> 22 #include <iostream> 23 #include "fstream" 24 25 26 using namespace std; 27 using namespace cv; 28 29 int main(int args,char* argv[]) 30 { 31 string buf; 32 ifstream svm_data(argv[1]); /*读入视频文件列表 */ 33 ofstream result(argv[2]); /* 保存结果文件 */ 34 double sum=0; 35 while (svm_data) 36 { 37 if (getline(svm_data,buf)) 38 { 39 result<<"计算视频"<<buf.c_str()<<"的时长"<<endl; 40 //打开视频文件：其实就是建立一个VideoCapture结构 41 VideoCapture capture(buf.c_str()); 42 //检测是否正常打开:成功打开时，isOpened返回ture 43 if(!capture.isOpened()) 44 result<<"fail to open!"<<endl; 45 //获取整个帧数 46 double totalFrameNumber = capture.get(CV_CAP_PROP_FRAME_COUNT); 47 //获取帧率 48 double rate = capture.get(CV_CAP_PROP_FPS); 49 50 double vedio_time= totalFrameNumber/rate; 51 result<<"该个视频共"<<totalFrameNumber<<"帧,"<<"帧率为:"<<rate<<"该视频时长为："<<vedio_time<<" s"<<endl; 52 capture.release(); 53 sum +=vedio_time; 54 55 } 56 } 57 58 result<<"视频时长总和为："<<sum/60<<"mins"<<endl; 59 result.close(); 60 return 0; 61 }