《OpenCV》Part10 OpenCV3.1.0 openCV读取摄像头并保存为.avi视频
#include <opencv2/core.hpp> #include <opencv2/opencv.hpp> #include <opencv2/highgui.hpp> #include <opencv2/videoio.hpp>//for camera #include <opencv2/video.hpp> #include <opencv2/imgproc//imgproc.hpp> #include <opencv2/ml/ml.hpp> #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/ml/ml.hpp" #include <time.h> #include <ctime> #include <iostream> #include <string> using namespace std; using namespace cv; int main(int argc, char ** argv) { char filename[1024]; if (argc == 1) sprintf(filename, "%s", "camera.avi"); if (argc == 2) sprintf(filename, "%s", "123"); VideoCapture capture; capture.open(0); if (!capture.isOpened()) { cout << "Could not initialize capturing...\n" << endl; return -1; } //按时间格式命名 time_t now = time(NULL);获取1970.1.1至当前秒数time_t struct tm * timeinfo = localtime(&now); //创建TimeDate,并转化为当地时间， //struct tm * timeinfo = gmtime ( &currTime ); //创建TimeDate,并转化为GM时间， char path[60]; strftime(path, 60, "%Y_%m_%d_%H_%M_%S", timeinfo); char strPath[100]; sprintf(strPath, "%s.avi", path);//将创建文件的命令存入cmdchar中 //保存为avi格式视频 Mat frame; VideoWriter writer; writer.open(strPath, CV_FOURCC('X', 'V', 'I', 'D'), 25, Size(640, 480), true);//Size(640, 480)//Size(frame.rows, frame.cols)//"cam.avi" int n = 1; while (true) { capture >> frame; char* cstr = new char[120]; sprintf(cstr, "%s%d%s", "D:\\OpenCVWorkSpace\\saveCamAsVideo\\saveCamAsVideo\\savedPic\\Pic", n++, ".jpg"); imwrite(cstr, frame); imshow("Video_Capture", frame); if (frame.empty()) { break; } writer << frame; waitKey(3); } //return 0; } 该程序功能为读取摄像头后将视频存储为avi格式。
其中的waitKey(3)如果没有的话程序容易未响应。 CV_FOURCC('P','I','M','1') = MPEG-1 codec CV_FOURCC('M','J','P','G') = motion-jpeg codec CV_FOURCC('M', 'P', '4', '2') = MPEG-4.2 codec CV_FOURCC('D', 'I', 'V', '3') = MPEG-4.3 codec CV_FOURCC('D', 'I', 'V', 'X') = MPEG-4 codec CV_FOURCC('U', '2', '6', '3') = H263 codec CV_FOURCC('I', '2', '6', '3') = H263I codec CV_FOURCC('F', 'L', 'V', '1') = FLV1 codec
