They are technically just stretching the video right? Where do the additional information for the new pixels come from? Does it cost a lot? What’s the simplest way to restore similar home videos to 4k crisp quality, can it even be done by a regular guy on a home computer?
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A remaster isn’t stretching the video. They re-scan the original film or video at higher resolution. Film has *very* high resolution, a ton is lost during the reduction to pixels. You can also use image processing to “fill in” (fancy word for “guess”) the missing information when going up resolution from something that was previously limited resolution, like old video.
It doesn’t look pixelated because you’re not just making the original pixels bigger, you’re rebuilding the image with new smaller pixels.
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