title: screencast support in Qt?
body: <p>I know there're some really wonderful tools out there for capturing screen in motion on a desktop but as part of development of this app I've been working on, I need to capture activities taking place on a particular widget area. The development so far has been done entirely on top of open Qt SDK but I don't see any support for screencast as such.</p>
  
  <p>I've already explored all the relevant answers on this forum in addition to googling. Merging together periodic pixmaps on grabWidget seems to be one way to go but I'm hoping for something more elegant and robust. All the howTos I found are based on top of DirectX or GDI.</p>
  
  <p>Please let me know the proper way if there exists one in this context or the other alternatives I have in GPL license frame.</p>