The bottom line is, and Wayne also hits the nail on the head:
Screen recording software is notorious for presenting problems in Vegas
and other NLE for that matter… And there isnt much you can do to get around
that if you plan on keep using the same capture method, Sorry.
The only thing i can suggest for you to try, is to do your captures in
short increments instead.
Steve Rhoden (Cow Leader)
Film Maker & VFX Artist.
Owner of Filmex Creative Media.
Samples of my Work and Company can be seen here:
https://www.facebook.com/FilmexCreativeMedia