[英]C++ rtsp stream in Windows Forms
我有一個程序可以從相機接收 rtsp 視頻並將其傳輸到圖片框。 它只工作幾秒鍾,然后程序掛起,幫助查找錯誤。
private: System::Void start_Click(System::Object^ sender, System::EventArgs^ e) {
if (start->Text == "Start stream"){
start->Text = "Stop stream";
}
else if (start->Text == "Stop stream") {
pictureBox1->Refresh();
start->Text = "Start stream";
}
cv::VideoCapture stream = cv::VideoCapture(ip[n]);
cv::Mat frame;
while (start->Text == "Stop stream")
{
stream.read(frame);
System::Drawing::Graphics^ graphics = pictureBox1->CreateGraphics();
System::IntPtr ptr(frame.ptr());
System::Drawing::Bitmap^ b = gcnew System::Drawing::Bitmap(frame.cols, frame.rows, frame.step, System::Drawing::Imaging::PixelFormat::Format24bppRgb, ptr);
System::Drawing::RectangleF rect(0, 0, pictureBox1->Width, pictureBox1->Height);
graphics->DrawImage(b, rect);
delete graphics;
}
通過更改 while(expression) 修復
cv::VideoCapture stream = cv::VideoCapture(ip[n]);
cv::Mat frame;
if (stream.isOpened())
{
flag = true;
while (cv::waitKeyEx(1) != 27)
{
stream.read(frame);
System::Drawing::Graphics^ graphics = pictureBox1->CreateGraphics();
System::IntPtr ptr(frame.ptr());
System::Drawing::Bitmap^ b = gcnew System::Drawing::Bitmap(frame.cols, frame.rows, frame.step, System::Drawing::Imaging::PixelFormat::Format24bppRgb, ptr);
System::Drawing::RectangleF rect(0, 0, pictureBox1->Width, pictureBox1->Height);
graphics->DrawImage(b, rect);
delete graphics;
}
}
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