Thx Ami,
Think the better way is to spcecify nothing for type, wen I use MPEGVideo instead of AVIVideo for reading an avi file(divx) and I focus on an Windows window(explorer, source edit, etc), it hide video and display background of dialog, and with no type defined I don't get that annoying sound cut in loop(AVIVideo) plus no display bug, so its fine.
