$onvif=new POnvif();
    $onvif->setIPAddress('x.x.x.x');
    $onvif->setUsername('admin');
    $onvif->setPassword('admin');
    $onvif->initialize();
     
    debarr($onvif->getSources());
    debarr($onvif->media_GetStreamUri('secondStream_Profile_Token'));