Hallo,
i have problem with importing many files(240fps 720p MOV from iphone). When I import few of them, it works, but when i import more, preview is black, and i can only hear sound. When i delete few videos, then it works perfect. All videos separately works. I checked FileIOsurrogate proces, and it works only, if it takes less than something about 1GB RAM. If its more, preview is black, just sound, or vegas stop responding.
Using vegas 14 and 15, both has this problem.
win7, i5 2,6ghz, RAM 8GB