Hello guys,
I had this issue in the past also, and now I just rendered a new video and have the same issue with jpg images inserted at the end of the video, some images have a grey border which actually it's not present in the jpg itself, only after exporting the video, and also while editing the video the border is visible, I tried to mask it with another white image that I rescaled over the logo border but that image also has some borders in the rendered video :(
This is the video link, at the end of it you will see the issue, at minute 4:11
Any ideea how to get rid of those "borders" ?