Hi folks

I am a long time Movie Maker user but got sick of the crashes and have just switched to Sony Vegas Movie Studio Platinum 10.

I am working on my first project, which has a large number of video and audio clips. A couple of times I have gone back over the timeline and the work I have done and found a couple of clips/events that I have inserted are blank in the preview window, even though I can see their thumbnail image still in the timeline. Making a test movie the video in those sections is blank, although the audio is fine. The clips are still in the Project Media window - I have tried reimporting the original files into the Project Media and reinserting into the timeline - but that is time consuming because I need to do fine resizing on each clip/event in the timeline and would prefer not to have to keep redoing all that work.

Am I doing something wrong or is there a quick fix that I don't yet know about?

Thanks for any help!