[PyQt] PyQt snapshot crash on Qt5.4 with bogus, QGraphicsVideoItem

[lloyd konneker]

Thanks.  I think my problem use of QGraphicsItem is as a grouping thing, 
instead of using QGraphicsItemGroup.  The Qt documentation suggests you 
can do that.  As you suggest, I probably should do it differently.

But my understanding of the PyQt code differs from yours.  I thought 
that the casting depended on some ordering of modules, and that 
QMultimediaWidgets was first in the order.  I could be wrong, I didn't 
read very carefully.  The strange thing is, this problem seems new in 
the last six months: my code was working then.