Premiere Pro - Unwanted Letterboxing in HD 1080p Video After editing a video in Premiere Pro CC 2015 and then exporting it, a 1080p video becomes letter-boxed on the left and right sides. I have double checked all the settings, and for some reason it continues to letter box. 

Here is an example video to show you what I mean.
That can happen, when you use different Pixel aspect Ratio. Use Match Sequence Settings and use Pixel aspect Ratio in your sequence same with footage.