juanggp

evertime made a video, and tried edit again the same video the preview screen
goes black, play video clip but the preview screen is black and the sound is
play but i can't see the preview screen because is black. what happen? how
will do make for fix this problem?
means or another words during editing, when I try and preview a video the
screen remains blank
i discover if you add a new transition play good. but i need to change all
the transition all picture for can see preview sreen. this is annoying.