[Interest] QGraphicsView widget vs opengl viewport

[d3fault]

For portability, it's easy to let the system you're compiling on
decide whether or not to use OpenGL. Check out the Video Graphics Item
example ( http://qt-project.org/doc/qt-4.8/multimedia-videographicsitem.html
) to see how trivial it is to set up a few #ifndefs for this.
Specifically, look in videographicsitem.pro and videoplayer.cpp

d3fault