After building a video, rendering, and saving, the opacity of some of the pictures and video's are showed as "media off line". When I check the opacity of the item it is about mid range. If I reset the Opacity to near, but less then 100%, the picture / video is shown correctly. I re render the item, save the file, but the next time I open the file the same problem exists. Usually the problem occurs for 30% to 50% of the items.
I can manually, item by item, correct the problem, but the correction is not saved.