Here's how you can use dedicated noise reduction software and color grading to massively improve your smartphone video
THE PROBLEM
THE SOLUTION
What is Neat Video?
Neat Video is software with one purpose: to reduce noise. If you look at the screenshot above, you can see the original noise around the outside of the blue bounding box. Pretty impressive, right?
The way I used Neat Video in this video is the easy way: take an exaggerated noise sample, then apply it to the whole video. But this is professional software, and if you were using it in a professional application you could fine tune the noise in every scene so that it's barely apparent.
Masking with Noise
Unlike film, digital video doesn't have uniform noise across the entire image. A smartphone's DSP will artificially elevate the exposure of the shadows in the hope that everything stays exposed, and this is especially true of Android devices. Once we apply the noise reduction from Neat Video, the bright areas of the scene will appear artificially smoothed and the dark areas will still have some noise, but it will be blurrier.
These two noise reduction artifacts are distracting, and I've found the best and most time-efficient way to hide them is to overlay some film noise. This noise is applied evenly to the whole frame, so no part of the scene seems any more processed than another. It's not that we're trying to add detail where there isn't any, the goal is to keep the viewer's attention on the narrative itself.
You're going to need a strong PC
This process can be very CPU intensive, so if you don't have a strong computer your editor will probably lag. In fact, this process works significantly better with 4K source footage, but to process 4K with Neat Video you need something like an AMD threadripper machine to make it possible.
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