视频合并；将两个视频合并为一个文件，并在视频中打标签

#include <iostream> #include <opencv2/opencv.hpp> #include <unistd.h> #include <error.h> #include <errno.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/types.h> #include <pthread.h> #include <linux/videodev2.h> #include <sys/mman.h> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <iostream> #include <iomanip> #include <string> using namespace std; using namespace cv; int main(int argc, char ** argv) { std::string videoFile = "top_view.mp4";//视频的路径 std::string videoFile1 = "fusion_view.mp4";//视频的路径 /** 打开第一个视频文件 */ VideoCapture cap; //视频句柄变量 cap.open(videoFile);//打开视频 if(!cap.isOpened()) //判断是否打开了 { printf("cap.isOpened is error\n"); return -1; } /** 打开第二个视频文件 */ VideoCapture cap1; //视频句柄变量 cap1.open(videoFile1);//打开视频 if(!cap1.isOpened()) //判断是否打开了 { printf("cap.isOpened is error\n"); return -1; } /** 打开第一个视频文件的帧数 */ int frame_num = cap.get(cv::CAP_PROP_FRAME_COUNT); std::cout << "videoFile total frame number is: " << frame_num << std::endl; /** 打开第二个视频文件的帧数 */ int frame_num1 = cap1.get(cv::CAP_PROP_FRAME_COUNT); std::cout << "videoFile1 total frame number is: " << frame_num1 << std::endl; /** 打开第一个视频文件的帧率 */ int fps = cap.get(cv::CAP_PROP_FPS); std::cout << "videoFile fps: " << fps << std::endl; /** 打开第二个视频文件的帧率 */ int fps1 = cap1.get(cv::CAP_PROP_FPS); std::cout << "videoFile1 fps1: " << fps1 << std::endl; /** 打开第一个视频文件的宽度 */ int image_width = cap.get(cv::CAP_PROP_FRAME_WIDTH); std::cout << "videoFile image width is: " << image_width << std::endl; /** 打开第二个视频文件的宽度 */ int image_width1 = cap1.get(cv::CAP_PROP_FRAME_WIDTH); std::cout << "videoFile1 image width is: " << image_width1 << std::endl; /** 打开第一个视频文件的高度 */ int image_height = cap.get(cv::CAP_PROP_FRAME_HEIGHT); std::cout << "videoFile image height: " << image_height << std::endl; /** 打开第二个视频文件的高度 */ int image_height1 = cap1.get(cv::CAP_PROP_FRAME_HEIGHT); std::cout << "videoFile1 image height: " << image_height1 << std::endl; /** 打开第一个视频文件的矩阵对象的格式*/ int frame_format = cap.get(cv::CAP_PROP_FORMAT); std::cout << "videoFile frame format: " << frame_format << std::endl; /** 打开第二个视频文件的矩阵对象的格式 */ int frame_format1 = cap1.get(cv::CAP_PROP_FORMAT); std::cout << "videoFile1 image height: " << frame_format1 << std::endl; /** 合并视频初始化 */ std::string mergeVideooFile = "mergeVideo.avi"; int mergeVideooHeight = 600; int mergeVideooWidth = 1250; float mergeVideooFps = 10.0; int mergeVideooFpsFrameFormat = CV_8UC3; /* mergeVideooHeight = image_height + image_height1 + 10; mergeVideooWidth = image_width + image_width1 + 10; mergeVideooFps = fps; if(fps1>fps) mergeVideooFps = fps1; mergeVideooFps = 10; mergeVideooFpsFrameFormat = frame_format; */ cv::VideoWriter track_writer; Mat img = cv::Mat::zeros(mergeVideooWidth, mergeVideooHeight, mergeVideooFpsFrameFormat); track_writer.open (mergeVideooFile, cv::VideoWriter::fourcc('M', 'P', '4', '2'), mergeVideooFps, cv::Size(mergeVideooWidth, mergeVideooHeight)); if(!track_writer.isOpened()) { assert("track writer open failed!\n"); } Mat frame; Mat frame1; while(1) { cap.read(frame);//从第一个视频获取一帧图片 cap1.read(frame1);//从第二个视频获取一帧图片 if(frame.empty()) break; //是否加载成功 //std::cout << "Width : " << frame1.cols << std::endl; //std::cout << "Height: " << frame1.rows << std::endl; // std::cout << "Width : " << frame.cols << std::endl; //std::cout << "Height: " << frame.rows << std::endl; //cout << "======================" << endl; // 设定ROI区域：截取一部分进行合并 Mat imageROI= frame(Rect(400,0,400,600)); Mat imageROI1= frame1(Rect(200,0,850,450)); // 大小转换 Mat imageROI1dst = Mat::zeros(600,850 , CV_8UC3); //我要转化为850*600大小的 resize(imageROI1, imageROI1dst, imageROI1dst.size()); // 视频写字 putText(imageROI1dst, videoFile, Point(5, 55),FONT_HERSHEY_PLAIN,2.0,(0, 255, 255),2); putText(imageROI, videoFile1, Point(5, 55),FONT_HERSHEY_PLAIN,2.0,(0, 255, 255),2); //创建目标Mat Mat des; des.create(mergeVideooHeight,mergeVideooWidth, imageROI1dst.type()); // 视频帧合并 Mat r1 = des(Rect(0, 0, 850, 600)); imageROI1dst.copyTo(r1); Mat r2 = des(Rect(850, 0, 400, 600)); imageROI.copyTo(r2); // 格式化要保存的视频帧 cv::resize(des, img , cv::Size(mergeVideooWidth, mergeVideooHeight)); // 保存视频 track_writer.write(img); // 可视化 imshow("mergeVideoo",des); if (cv::waitKey(30) == 'q')//可以用开控制播放或者获取图片的速度，毫秒级别 { break; } } destroyWindow("mergeVideoo");//关闭窗口bb； destroyAllWindows();//关闭所有的窗口 cap.release();//释放视频句柄 track_writer.release(); return 0; }