Converting from cv::Mat to QImage quickly

Hey, so I have a setup with my webcam working, except that the conversion from cv::Mat to QImage is pretty slow.

Code:

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QImage VideoReader::getFrame() {
    Mat frame;
    cap >> frame;
 
    QImage image = QImage((uchar*)frame.data, frame.cols, frame.rows, frame.step, QImage::Format_RGB888);
 
    return image;
}

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Grabbing the frame from the camera only takes around 5 milliseconds, but the conversion to QImage takes around 15. Is there any way to cut down on this time?