QVideoFrame VideoFilterRunnable::run(QVideoFrame* input,
                                     const QVideoSurfaceFormat& surfaceFormat,
                                     QVideoFilterRunnable::RunFlags flags)
{
    if (input->isValid()) {
        if (input->map(QAbstractVideoBuffer::ReadOnly)) {

            if (m_videoHeight == 0 && m_videoWidth == 0) {
                m_videoHeight = input->height();
                m_videoWidth = input->width();
                dmsMainWindow->setVideoHeight(m_videoHeight);
                dmsMainWindow->setVideoWidth(m_videoWidth);
                initDMS();
            }
            ++m_frameCount;
            dmsMainWindow->setFrameCount(m_frameCount);

            cv::Mat img = cv::Mat(m_videoHeight, m_videoWidth, CV_8UC4, input->bits());
            std::shared_ptr<DMSOutStr> DMSOut (new DMSOutStr);
            DMS(img.data, img.cols, img.rows, DMSOut.get());
            dmsMainWindow->populateOutputStructure(DMSOut.get());
            input->unmap();
        } else {
             qDebug() << "error while mapping frame";
        }
    } else {
         qDebug() << "invalid input";
    }

    return *input;
}