void PeopleIdentificationMainWindow::setVideoFilePath(const QString& videoFilePath)
{
    this->m_videoFilePath = videoFilePath;
    if (!this->m_videoFilePath.isEmpty()) {
        const std::string videoFilePathStr = this->m_videoFilePath.toLocal8Bit().constData();
        this->m_app = new application(videoFilePathStr);
    } else {
        this->m_app = new application();
    }
    this->m_videoWidth = this->m_app->getVideoWidth();
    this->m_videoHeight = this->m_app->getVideoHeight();
    emit this->videoFilePathChanged();
    this->setCameraInput(videoFilePath.isEmpty());
}