I have about 10 minutes of footage which includes what is supposed to be a 100% white background (no gradients).
The person who shot the footage apparently used 2 overlapping sheets of white background paper.
This left a horizontal line across the background.
It's really faint, but still noticeable.
Is there a relatively easy way to get rid of this without having to deal with it on a frame by frame basis?
(Note: to make matters worse, sometimes — though rarely — the line is directly behind the subject — a product being unboxed)