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Frame rate is affected by displaying two videos on the mainwindow

  • Dear All,
    I have two methods.
    One method received the image frame from the camera and saved into the queue, then displayed on a label (label1) through Signal AND Slot on the main window.
    Another method, take out the image from the queue and process and display on the main widow at another label (label2).
    FPS is measured at method one.
    If I don't display at label2, fps is still the same. Once I display the processed image on the label2, fps is dropped to half. How can I display two videos on the two labels on the main window without affecting the fps?

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