Videomaker – Learn video production and editing, camera reviews › Forums › General › Video and Film Discussion › Horizontal lines in sony vegas project
What is the source of the video? How are you importing it? What does it look like when you play it back in/from your camera?
It’s highly unusual for what you’re describing to occur and it’s more apt to be a problem with the source material, or with a cable or connector, than with the software, although anything is possible.
Providing more details will help in determining the source of the problem.