Where do black bars come from?
Use an ultra widescreen aspect ratio to get black bars.
To get the letterbox look without cropping any video footage, use a cinematic aspect ratio when you film.
You can also crop your footage to different aspect ratios in the video editing phase in order to achieve this look with tools like Auto Reframe in Adobe Premiere Pro. Check out this tutorial to learn how to use this AI-powered feature. If you go this route, be aware that you could lose some video quality due to a reduction in pixel count.
But if you shot your footage in an aspect ratio such as full screen (4:3), or widescreen (16:9), you can also add letterboxes as an overlay in post-production with a video editor app. Here’s how:
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