That’s an abnormality from the color correction. However, I did fix the contrast so that on a properly calibrated monitor/tv, it should appear as black as the rest of the film. I had to drastically increase the brightness on my screen just to see it.

Is anybody else seeing a difference? It’s entirely possible my eyes or screen are to blame in which case I’ll re-encode with new black bars across the whole film just to be safe, but I’m fairly certain it shouldn’t be visible on a properly calibrated monitor.