最近基于TX2平臺做專案，需要用到opencv的VideoCapture功能，我在使用程序中遇到了標題中所描述的問題，在此記錄下解決的方法，
- cmakelist添加目標鏈接庫
find_package(catkin REQUIRED COMPONENTS
roscpp
rospy
std_msgs
eigen_conversions
message_generation
cv_bridge
image_transport
)
add_executable(rtsp_camera
src/network/rtsp_camera.cpp)
target_link_libraries(rtsp_camera
${OpenCV_LIBRARIES}
${catkin_LIBRARIES}
) - .cpp檔案中添加頭檔案
#include <opencv2/core/core.hpp>
#include <image_transport/image_transport.h>
#include <opencv2/highgui/highgui.hpp>
#include <cv_bridge/cv_bridge.h>
#include <opencv2/videoio/videoio.hpp>
#include <opencv2/video.hpp>
#include <opencv2/imgproc/imgproc.hpp>- .cpp檔案中相關代碼展示
void
RtspCamera::spin()
{
ros::Rate loop_rate(3);
//rtsp視頻流地址
string filename = "rtsp://admin:admin@192.168.42.108:554/cam/realmonitor?channel=1&subtype=0";
Mat frame;
cv::VideoCapture cap;
cap.open(filename);
if (!cap.isOpened()) {
cerr << "打開視頻流失敗\n";
return;
}
while(ros::ok())
{
cap.read(frame);
if (frame.empty()) {
cerr << "未提取到視頻幀\n";
break;
}
image_ = cv_bridge::CvImage(std_msgs::Header(), "rgb8", frame).toImageMsg();
image_raw_pub_.publish(&image_);
ros::spinOnce();
loop_rate.sleep();
}
}- 編譯發現報標題中所示錯誤，查看/usr/local/include/opencv2/videoio.hpp中有VideoCapture類，因此猜想可能沒有找到相關靜態鏈接庫，因此在cmakelists檔案中補充相關靜態鏈接庫，如下所示，問題解決
target_link_libraries(rtsp_camera
${OpenCV_LIBRARIES}
${catkin_LIBRARIES}
/usr/local/lib/libopencv_videoio.so
) 轉載請註明出處，本文鏈接：https://www.uj5u.com/qita/337844.html
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