I use laptop, after imported .MP4 it is about 13 sce long and only 39.8MB
my RAM is 8GB CPU is 3.0GHz GPU is Intel HD graphic 520.
I have already set the max RAM into 5000MB.
as soon as I imported mp4 file, the preview is black and as soon as I click the clip, it CRASHED~~~
BTW, i import 29 photos to vegas pro It can run smoothly and there is no any problem..