opencv打开IP网络摄像头

Question

想用opencv2.4.9+QT接收一个wifi模块传回的视频，根据网上的资料和实际情况，编写如下：const string addr="http://192.168.1.1:8080/?action=stream.mjpg";

VideoCapture cap(addr);

但是就是读不出来，我用浏览器可以显示视频，请问前辈们有遇到这种情况的么，是因为什么地方配置不对吗？还请指教

Answer 1

試試看我下免寫的 code. 我自己用的 video camera 會成功 !!

讀取 local video 方式如下:

 #include <cstdio>
#include <opencv2/opencv.hpp>
using namespace cv;

int main(){
    VideoCapture video(0);
    if (!video.isOpened()){
        return -1;
    }
    Size videoSize = Size((int)video.get(CV_CAP_PROP_FRAME_WIDTH),(int)video.get(CV_CAP_PROP_FRAME_HEIGHT));
    namedWindow("video demo", CV_WINDOW_AUTOSIZE);
    Mat videoFrame;

    while(true){
        video >> videoFrame;
        if(videoFrame.empty()){
            break;
        }
        imshow("video demo", videoFrame);
        waitKey(33);
    }
    return 0;
}

讀取遠端 video 方式如下:

 #include <stdio.h>
#include <opencv2/opencv.hpp>
#include <iostream>
int main(int, char**) {
    cv::VideoCapture vcap;
    cv::Mat image;

    // This works on a D-Link CDS-932L

    const std::string videoStreamAddress = "http://USER:PWD@IPADDRESS:8088/mjpeg.cgi?user=USERNAME&password=PWD&channel=0&.mjpg";
       //open the video stream and make sure it's opened
    if(!vcap.open(videoStreamAddress)) {
        std::cout << "Error opening video stream or file" << std::endl;
        return -1;
    }

    for(;;) {
        if(!vcap.read(image)) {
            std::cout << "No frame" << std::endl;
            cv::waitKey();
        }
        cv::imshow("Output Window", image);

        if(cv::waitKey(1) >= 0) break;
    }   

}