I've been making training videos lately. I start with a basic camcorder - video and audio - track. After editing it down, I narrate on an additional audio track below the original and turn the original volume down. At various spots, I'll insert an arrow or still photo on additional video tracks above the original. Today, nearing the end of a project, all of the additional video tracks above the original stopped working. The level was at 100%, I could see the thumbnails in the timeline, but they weren't showing when I previewed. I had to make additional new video tracks and move the files into the new ones. Not a huge disaster, but still. I don't know what happened that turned them off, I don't know why they looked like normal, etc. Before doing the fix, I closed and restarted Vegas Pro (19 by the way). When that didn't help, I rebooted the computer. Neither worked.
Any thoughts? I know sometimes I'll inadvertently hit a letter key and the cursor changes or something. Did I possibly hit something that muted those tracks? If so, why didn't it show them as muted?
OK, I'll shut up now.