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打标记后视频保存

VideoCapture cap(“D:\rec.avi”);

//计算视频帧数

int VedioFPS = cap.get(CV_CAP_PROP_FPS);

//cout << “视频帧率” << VedioFPS << endl;

// 保存视频

VideoWriter writer(“alarm.mp4”, CV_FOURCC(‘M’, ‘J’, ‘P’, ‘G’), VedioFPS, Size(ROI_Weidth, ROI_Height * 2));

if (!cap.isOpened())

{


cout << “Error opening video stream or file” << endl;

return -1;

}

Mat frame;

while (1) {


// Capture frame-by-frame

cap >> frame;

// If the frame is empty, break immediately

if (frame.empty()) break;

if (frame.channels() == 3) cvtColor(frame, frame, CV_RGB2GRAY);

//******************

// 处理图像

//******************

//在图像上打上标记

cvtColor(frame(roi_rect), ROIimg, CV_GRAY2RGB);

std::string str2 = “OriginalImage”;

cv::putText(ROIimg, str2, Point(roi_rect.width *0.5 – 20, 20), cv::FONT_HERSHEY_SIMPLEX, 0.3, cv::Scalar(0, 255, 255), 1);

cv::putText(ROIimg, “Load”, Point(0, 20), cv::FONT_HERSHEY_SIMPLEX, 0.5, cv::Scalar(0, 255, 255), 1);

std::string str1 = “ImageProcessing”;

cv::putText(tempImg, str1, Point(roi_rect.width *0.5 – 30, 20), cv::FONT_HERSHEY_SIMPLEX, 0.3, cv::Scalar(0, 255, 255), 1);

vconcat(ROIimg, tempImg, conbine);

imshow(“Image”, conbine);

writer << conbine;

char c = (char)waitKey(1);

if (c == 27)

break;

}

cap.release();

destroyAllWindows();