Ah.
Here, I’ll explain:
The original shaky footage was shot at 4K (4096 × 2160 pixels or so) resolution on a GoPro camera.
Then, that footage was loaded into something like Adobe Premier, and it was digitally stabilized and downsampled at the same time. That means the image was cropped down to the much smaller HD resolution (1920 x 1080), and that allowed the computer to stabilize the image. This video gives a quick look at how it’s done (https://www.youtube.com/watch?v=pJWPyE6NfmE) That said, the more “extra” pixels you’ve got to work with, the better (as the computer has more space to stabilize without encroaching the shot…), so starting at 4K and being able to go to 25% of that means you can get it buttery smooth like this.
The alternative setup would be a powered gimbal holding the camera- that would physically stabilize the image, but given the camera’s position and the nature of the terrain, I don’t see a way to have done it like that.
Anyway.
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