linux下OpenCV打开视频文件，并解码显示

#include <iomanip> #include<stdio.h> #include <iostream> // for standard I/O #include <string> // for strings #include <opencv2/core/core.hpp> // Basic OpenCV structures (cv::Mat) #include <opencv2/highgui/highgui.hpp> // Video write using namespace std; using namespace cv; int main(int argc, char* argv[]) { string videopath=argv[1];//获取视频路径 //OPENCV获取视频 VideoCapture capture; capture.open(videopath); //检测是否正常打开:成功打开时，isOpened返回ture if(!capture.isOpened()) { cout<<"fail to open!"<<videopath <<endl; } else { cout<<"success to open!"<<videopath <<endl; } getchar(); //获取整个帧数 long totalFrameNumber = static_cast<int>(capture.get(CV_CAP_PROP_FRAME_COUNT));//获取总帧数 cout<<"整个视频共"<<totalFrameNumber<<"帧."<<endl; //获取帧率 int fps = static_cast<int>(capture.get(CV_CAP_PROP_FPS));//获取fps cout<<"帧率为:"<<fps<<endl; /* //设置开始帧() long frameToStart = 30; capture.set( CV_CAP_PROP_POS_FRAMES,frameToStart); cout<<"从第"<<frameToStart<<"帧开始读"<<endl; //设置结束帧 int frameToStop = 400; if(frameToStop < frameToStart) { cout<<"结束帧小于开始帧，程序错误，即将退出！"<<endl; return -1; } else { cout<<"结束帧为：第"<<frameToStop<<"帧"<<endl; } */ Mat frame; vector<Mat > frames;//视频帧保存序列 /* //读取下一帧,并解码 // 方法一 capture.read(frame); // 方法二 capture.grab(); capture.retrieve(frame); // 方法三 capture>>frame; */ bool stop = capture.read(frame);//读取帧 int count=0; //显示每一帧的窗口 //namedWindow("Extracted frame",WINDOW_NORMAL); //imshow("Extracted frame",frame); //waitKey(1); namedWindow(videopath,WINDOW_NORMAL); imshow(videopath,frame); waitKey(1); //getchar(); int delay = 1000/fps; while(stop) { count++; cout<<"now read "<<count<<"/total number "<<totalFrameNumber<<endl; //getchar(); //Mat tmpimg;//深拷贝 //frame.copyTo(tmpimg); //frames.push_back(tmpimg);//将视频帧保存至帧序列 //frames.clear(); //读取一帧 stop = capture.read(frame); //这里加显示过程 imshow(videopath,frame); waitKey(1); } //关闭视频文件 capture.release(); return 0; }