I have small issue with some .MOV files in my timeline. There is some unwanted noise that is appearing on my clips. It happens over time...meaning I will be working in a sequence for a few hours, and then randomly this noise starts to appear on the footage. When I copy and paste the same exact footage to another sequence (with the same settings as the original) the noise disappears.
Attached are a couple pictures showing the difference.
This is footage taken from a webcam so its not very high res to begin with, but if you enlarge the images you will see the difference.