The whole timeline has windows that are red that say Media Offline. Where did my video/audio go??
Where do I find it? How do I restore it into the timeline I was working on with the project. When I open the project I also get a question that wants to know where is a specific file pertaining to this project.
This means the links to your clips have been broken.
Where was this video? Was it still on your camcorder or maybe on an external drive you removed?
Or, was it on a DVD, that you Imported directly, and now that DVD is not in the drive/burner?
When media is listed as Off-line, just as Steve mentions, the link between the Project file (.PREL) has been broken. This can happen, when one Moves files, Renames files, or those files are, for some other reason, not where the program last saw them. This ARTICLE will give you a bit more background on the .PREL files, plus some tips on Save/Save_As, etc.
Usually, one gets warning messages, and PrE will help you locate your files. It does a good job of this. Did you get any messages, when you Opened this Project? Did you Move, or Rename any media files?