获取图像的测试代码，依赖opencv4.2的动态库，测试可以正常出图，用opencv4.6的库出现cap.isOpened()返回false

[nb]

//#include <opencv2/opencv.hpp>
#include "AlgorithmAT.h"
#include "AlgorithmSLF.h"
#include <opencv.hpp>
#include <iostream>
#include <string>
//using namespace std;
int main(int argc, char* argv[])
{
	
	int width = 1080;
    int height = 1080;
    int fps = 30;

    if (argc > 1) {
        width = std::stoi(argv[1]);
    }
    if (argc > 2) {
        height = std::stoi(argv[2]);
    }
    if (argc > 3) {
        fps = std::stoi(argv[3]);
    }

	//创建客户端实例
	AlgorithmAT* at = new AlgorithmAT();

	std::string configPath = "/home/gensong/project/ATDllDemo/config/config.yaml";
	std::string algorithmConfigPath = "/home/gensong/project/ATDllDemo/config/algorithmConfig.yaml";
	at->Init(configPath,algorithmConfigPath);

	int launchMode = 0;
	//cv::Mat src_frame = cv::imread("/home/gensong/project/ATDllDemo/picture/1.jpg");
	//bool ret_val = cap.read(src_frame);

	std::string v4l2_cmd = "media-ctl -d /dev/video0 --set-v4l2 '\"m00_b_mvcam 7-003b\":0[fmt:Y8_1X8/" + std::to_string(width) + "x" + std::to_string(height) + "@1/" + std::to_string(fps) + " field:none]'";
    system(v4l2_cmd.c_str());
    printf("func is %s,%d\n",__func__,__LINE__);
    cv::VideoCapture cap("v4l2src io-mode=dmabuf device=/dev/video0 ! video/x-raw, format=(string)GRAY8, width=(int)" + std::to_string(width) + ", height=(int)" + std::to_string(height) + " ! appsink");
	
    printf("func is %s,%d\n",__func__,__LINE__);
    if (cap.isOpened()) {
        printf("func is %s,%d\n",__func__,__LINE__);
        while (true) {
			cv::Mat src_frame;
            printf("func is %s,%d\n",__func__,__LINE__);
            bool ret_val = cap.read(src_frame);
            printf("func is %s,%d,ret_val is %d\n",__func__,__LINE__,ret_val);
            if (ret_val) {
                cv::imshow("demo", src_frame);
                cv::waitKey(1);

				long long frameTime = 20240222153410123;
				std::vector<Algorithm_Pos_t> locRes;
				cv::Mat dst_frame;
   				cv::medianBlur(src_frame, dst_frame, 5); // 
				bool retPos = at->GetPos(launchMode,dst_frame,frameTime,locRes);
				std::cout << "retPos:" << retPos << std::endl;

				vector<Algorithm_Pos_t>::iterator locItem;
				for(locItem = locRes.begin();locItem != locRes.end();locItem++)
				{
					std::cout << "id:" << (*locItem).id << std::endl;
					std::cout << "timeDelay:" << (*locItem).timeDelay << std::endl;
					std::cout << "x:" << (*locItem).x << std::endl;
					std::cout << "y:" << (*locItem).y << std::endl;
					std::cout << "z:" << (*locItem).z << std::endl;
					std::cout << "yaw:" << (*locItem).yaw << std::endl;
					std::cout << "pitch:" << (*locItem).pitch << std::endl;
					std::cout << "roll:" << (*locItem).roll << std::endl;
					std::cout << "id:" << (*locItem).id << std::endl;
				}
            } else {
                std::cout << "camera open failed" << std::endl;
                break;
            }
        }
    } else {
        printf("func is %s,%d\n",__func__,__LINE__);
        std::cout << "camera open failed" << std::endl;
    }

	cv::destroyAllWindows();
	
	//接收并打印数据
	// while(true)
	// {
	// 	//std::cout<< "getPose:"<<vision.aprilTag_t.id<<"-"<<vision.aprilTag_t.x<<"-"<<vision.aprilTag_t.y<<"-"<<vision.aprilTag_t.z<<std::endl;
	// 	usleep(30*1000);
	// }
		
	return 0;
}

[nb]

#include <opencv.hpp>
#include <iostream>
#include <string>

int main() {
cv::VideoCapture cap("/home/gensong/test.mp4"); // 打开本地视频文件
if (!cap.isOpened()) { // 检查文件是否成功打开
std::cout << "Failed to open video file!" << std::endl;
return -1;
}

cv::Mat frame;
while (cap.read(frame)) {          // 读取每一帧画面
    cv::imshow("Video", frame);    // 显示视频
    cv::waitKey(1);
}

cap.release();                     // 释放资源

return 0;

} 基于opencv4.6的库 用这个代码可以正常打开播放视频

[nb]

麻烦问下 cv::VideoCapture cap("v4l2src io-mode=dmabuf device=/dev/video0 ! video/x-raw, format=(string)GRAY8, width=(int)" + std::to_string(width) + ", height=(int)" + std::to_string(height) + " ! appsink"); 和 cv::VideoCapture cap("/home/gensong/test.mp4"); 两者的区别是什么？ 为什么 cv::VideoCapture cap("/home/gensong/test.mp4"); 就可以打开视频， 而 cv::VideoCapture cap("v4l2src io-mode=dmabuf device=/dev/video0 ! video/x-raw, format=(string)GRAY8, width=(int)" + std::to_string(width) + ", height=(int)" + std::to_string(height) + " ! appsink"); 就会提示 cap.isOpened()返回false

[veye_xumm]

@nb said in 获取图像的测试代码，依赖opencv4.2的动态库，测试可以正常出图，用opencv4.6的库出现cap.isOpened()返回false:

麻烦问下 cv::VideoCapture cap("v4l2src io-mode=dmabuf device=/dev/video0 ! video/x-raw, format=(string)GRAY8, width=(int)" + std::to_string(width) + ", height=(int)" + std::to_string(height) + " ! appsink"); 和 cv::VideoCapture cap("/home/gensong/test.mp4"); 两者的区别是什么？ 为什么 cv::VideoCapture cap("/home/gensong/test.mp4"); 就可以打开视频， 而 cv::VideoCapture cap("v4l2src io-mode=dmabuf device=/dev/video0 ! video/x-raw, format=(string)GRAY8, width=(int)" + std::to_string(width) + ", height=(int)" + std::to_string(height) + " ! appsink"); 就会提示 cap.isOpened()返回false

不好意思，回复的晚了。 我们对opencv的研究并不深入，只是给了一个简单的调试demo。 我想这个问题我现在无法给您准确的回复。

[nb]

@veye_xumm said in 获取图像的测试代码，依赖opencv4.2的动态库，测试可以正常出图，用opencv4.6的库出现cap.isOpened()返回false:

好意思，回复的晚了。 我们对opencv的研究并不深入，只是给了一个简单的调试demo。 我想这个问题我现在无法给您准确的回复

好的 谢谢 这个问题 我已经自己解决了的

[veye_xumm]

@nb 好的。真棒~

[w88121446]

@nb 您好，我遇到了类似的问题，请问一下您的解决方案就是将4.6的opencv更换成4.2的opencv吗？