Qt video examples does not work

I have Qt 2010.02.01, Windows 7.

In Exampels directory there are two video player examples: /multimedia/videographicsitem, /multimedia/videowidget But both of them does not work. They can show pictures (.jpg), bu开发者_StackOverflow社区t they cant open any .avi file (when open avi file, they just do nothing)... (I have all codecs installed)

Is there any ideas?

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check qt phonon... creating simple video player is like 5 lines of code