I use handbrake to convert movies and videos for use on my AVIC-8000NEX. A problem that I'm running into is the the Pioneer stretches the video vertically, removing the black bars on the top and bottom of the video. When I watch the same file on my computer, phone or tablet, the black bars are there, on the Pioneer, the're not. Is there a conversion program or setting in handbrake to add the top and bottom bars as part of the video so the Pioneer doesn't ignore them and stretch the video?