#wrapper{
    position: relative;
}

#video{
    position: absolute;
    top:  0px;
    left: 0px;
    visibility: hidden;
}

#camera-canvas{
    position: absolute;
    top:  0px;
    left: 0px;
    z-index: 50;
}

#rect-canvas{
    position: absolute;
    top:  0px;
    left: 0px;
    z-index: 100;
}