CV_CAP_PROP_FOURCC- 表示codec的四个字符(只对摄像头有效) value 属性的值。 函数cvSetCaptureProperty设置指定视频获取的属性。 目前这个函数对视频文件只支持:CV_CAP_PROP_POS_MSEC, CV_CAP_PROP_POS_FRAMES, CV_CAP_PROP_POS_AVI_RATIO windows下可用:OpenCV2.3.1 + vs2012,ubuntu下无法使用:vim + OpenCV2....
1.使用OpenCV打开电脑摄像头 //执行代码 #include <iostream> #include <opencv2/opencv.hpp> #include <opencv2/highgui.hpp> #include <opencv2/imgproc.hpp> #include <opencv2/videoio.hpp> #include<sstream> int main(int argc, char* argv[]) { cv::VideoCapture cap; //声明相机捕获对象 cap.set...
cap= cv2.VideoCapture('rtsp://admin:Vrc123456@192.168.2.226:554') fourcc= cv2.VideoWriter_fourcc(*'XVID') size=(int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)), int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))) out= cv2.VideoWriter('./rtsp_video.avi', fourcc,10.0, size)whileTrue: ret, frame=cap....
bool VideoWriter::open(const string& filename, int fourcc, double fps, Size frameSize, bool isColor=true);上面是类的构造函数与open方法,它们的参数相同,首先指定文件名,第二个参数是编码格式,OpenCV里提供了很多种的编码格式,如CV_FOURCC(‘P’,’I’,’M’,’1’)是MPEG-1格式,CV_FOURCC(‘M’,...
在OpenCV C++中保存视频文件,你可以按照以下步骤进行: 初始化一个cv::VideoWriter对象: 在保存视频之前,你需要初始化一个cv::VideoWriter对象,用于指定输出视频文件的名称、编码方式、帧率、分辨率等参数。例如: cpp cv::Size frameSize = cv::Size((int)cap.get(cv::CAP_PROP_FRAME_WIDTH), (int)cap.get(cv...
VideoWriter writer; int codec =CV_FOURCC('M','J','P','G'); //本行语句不再支持,改为下面语句: int...
cap.set(cv::CAP_PROP_GAIN, parameters->cameraGain); } double codec = 0x47504A4D; //code by FPaul. Should use MJPEG codec to enable fast framerates. cap.set(cv::CAP_PROP_FOURCC, codec); cameraRunning = true; cameraThread = std::thread(&Tracker::CameraLoop, this); ...
• CV_CAP_PROP_FOURCC 4-character code of codec.• CV_CAP_PROP_FRAME_COUNT Number of frames in the video file.• CV_CAP_PROP_FORMAT Format of the Mat objects returned by retrieve() .• CV_CAP_PROP_MODE Backend-specific value indicating the current capture mode.• CV_CAP_PROP_...
cap.open(s->image_path); int img_w = cap.get(cv::CAP_PROP_FRAME_WIDTH); int img_h = cap.get(cv::CAP_PROP_FRAME_HEIGHT); int fps = cap.get(cv::CAP_PROP_FPS); // 追踪类初始化时要用到 cv::VideoWriter writer("res/demo_res.mp4", cv::VideoWriter::fourcc('m', 'p', '4...
#include<opencv2/opencv.hpp> #include<iostream> usingnamespacestd; usingnamespacecv; intmain() { Mat src = imread('D:/images/011.jpg',IMREAD_GRAYSCALE);//读取进来的数据以矩阵的形势,第二个参数代表显示一张灰度图像。 if(src.empty()) ...