[Interest] QtMultimedia examples don't play video on all systems?

[Nikos Chantziaras]

I've built the video examples that come with the 5.1.0 beta 
("videowidget" and "player").  They are unable to play video when 
running the *.exe in a VMWare environment running XP and 7.  It works 
fine on a native Windows 7 environment with the NVidia drivers 
installed.  The same videos play just fine in Windows Media Player 
inside VMWare, so since QtMultimedia also uses DirectShow, I assume it 
should be working fine.

What causes that?