usb摄像头实时播放和录制

#include "opencv2/opencv.hpp" #include <time.h> #include<fstream> #include<windows.h> #include "opencv2/highgui/highgui.hpp" #include<String> #include<thread> #include "queue.h" using namespace cv; using namespace std; cycleQueue<Mat> q(1000); void getvideo(String& sc,double fps,Size framesize,bool &flag,bool &thread_exit) { cout << "thread:" << sc << endl; String file = sc + ".csv"; ofstream fc(file.c_str(),ios::out); sc = sc + String(".avi"); fc << "Frame,DateTime" << "\n"; long num = 0; char timestamp[60] = { 0 }; VideoWriter writer(sc, VideoWriter::fourcc('M', 'J', 'P', 'G'),fps,framesize); Mat frame; SYSTEMTIME tt; while (!flag) { if (q.isEmpty()) { cout << "q is empty "<< flag<< endl; continue; } frame=q.pop(); if (!frame.empty()) { GetLocalTime(&tt); snprintf(timestamp, 60, "%ld,%d-%02d-%02d %02d:%02d:%02d %06d", num++, tt.wYear, tt.wMonth, tt.wDay, tt.wHour, tt.wMinute, tt.wSecond, tt.wMilliseconds* 1000); fc << timestamp<<"\n"; writer << frame; imshow("video", frame); if (waitKey(20) == 'q') { thread_exit = true; break; } } } destroyAllWindows(); destroyWindow("video"); //cout << "44444444444444" << endl; //continue record remain video while (!q.isEmpty()) { frame = q.pop(); if (q.isEmpty()) continue; if (!frame.empty()) { GetLocalTime(&tt); snprintf(timestamp, 60, "%ld,%d-%02d-%02d %02d:%02d:%02d %06d", num++, tt.wYear, tt.wMonth, tt.wDay, tt.wHour, tt.wMinute, tt.wSecond, tt.wMilliseconds * 1000); fc << timestamp << "\n"; writer << frame; } } cout << "thread end" << endl; } int main(int argc, char** argv) { VideoCapture video(1); // With webcam get(CV_CAP_PROP_FPS) does not work. // Let's see for ourselves double fps = video.get(CV_CAP_PROP_FPS); video.set(CV_CAP_PROP_FRAME_WIDTH, 1920); video.set(CV_CAP_PROP_FRAME_HEIGHT, 1080); video.set(CV_CAP_PROP_FPS, 30); video.set(CV_CAP_PROP_FOURCC, VideoWriter::fourcc('M', 'J', 'P', 'G')); int width = video.get(CV_CAP_PROP_FRAME_WIDTH); int height = video.get(CV_CAP_PROP_FRAME_HEIGHT); // If you do not care about backward compatibility // You can use the following instead for OpenCV 3 // double fps = video.get(CAP_PROP_FPS); cout << " fps: " << fps <<"width: "<<video.get(CV_CAP_PROP_FRAME_WIDTH) <<"height: "<<video.get(CV_CAP_PROP_FRAME_HEIGHT) << "fourcc: "<<video.get(CV_CAP_PROP_FOURCC) << endl; // Number of frames to capture int num_frames = 10; // Start and end times time_t start, end; // Variable for storing video frames Mat frame; bool flag = false, thread_exit = false; cout << "Capturing " << num_frames << " frames" << endl; // Start time time(&start); SYSTEMTIME tt; GetLocalTime(&tt); char filename[20] = {0}; snprintf(filename, 20, "%d%02d%02d%02d%02d%02d", tt.wYear, tt.wMonth, tt.wDay, tt.wHour, tt.wMinute, tt.wSecond); ofstream fs; fs.open("total.txt"); // Grab a few frames Size size(width, height); String sc(filename); thread t(getvideo, ref(sc), fps, size, ref(flag),ref(thread_exit)); char temp[60] = {0}; int key = 0; while (video.isOpened()) { GetLocalTime(&tt); snprintf(temp,60 , "%d-%02d-%02d,%02d:%02d:%02d %06d", tt.wYear, tt.wMonth, tt.wDay, tt.wHour, tt.wMinute, tt.wSecond, tt.wMilliseconds*1000); fs << temp << "\n"; video.read(frame); q.push(frame); if (thread_exit) break; // cout << "press is:" <<waitKey(1000) << endl; } flag = true; // End Time time(&end); // Time elapsed double seconds = difftime(end, start); cout << "Time taken : " << seconds << " seconds" << endl; // Calculate frames per second fps = num_frames / seconds; cout << "Estimated frames per second : " << fps << endl; // Release video t.join(); video.release(); cout << "main end " << endl; return 0; }