I am using Vegas Pro Version 14.0 (Build 270) 64-bit
Using a Window 10 64-bit operating sys, Pro Verson 1703 OS Build 15063.726 Intel(R) Core(TM) i7-4771 CPU @ 3.50GHz Installed Ram 16.0 GB
I have been working on a project (length about 25 minutes) made up of some 15 different short i-Phone videos and images overlaid onto another longer Google Earth video MP4. All the iPhone videos that I am now having problems with worked fine and loaded properly during 2 weeks of editing. Now when I load the project the video files load up properly (I can see them on preview monitor), but shortly after (5 seconds or so), they go blank on the preview monitor, but the iPhone images and Google Earth video are viewable on the preview monitor.
When I copy & paste ALL (Cntrl A) the files into a new copy of Vegas Pro the same black preview screen happens again, but once again the iPhone images and Google Earth video are viewable on the preview monitor.
side note: I have noticed that as I got about 2 weeks into the editing that the system was crashing more often than at first (task monitor shows a Vegas file size upward of 500 MB).
thanks for any of your ideas, vic borgogno
PS: I have done some more testing and found the following: In sequentially copying various clips of the original video (the original video that wouldn't show a video preview) into a new copy of Vegas, I found that all the video previewed properly until I got very close to having all clips copied and transferred. Once I copied the last clips into the new copy of Vegas, it once again stopped previewing. Thinking it might be inherent in a particular clip, I did the same test but copied the files from the opposite end of the original video; and once again I got near the end, the same problem happened (ie no preview monitor video clips).
It is beginning to look to me like some maximum limit has been exceeded?