I have a square video from Snap Spectacles (1088x1088) that I want to overlay on itself zoomed in and blurred.
Example input frame:
Generated zoomed in and blurred background:
Desired output:
I think I can do this with ffmpeg's maskedmerge, but I'm having trouble finding examples.
There's an example of maskedmerge that merges two videos of the same size and dynamically removes a green screen, and another that merges videos with transparency.
Here's the closest I've been able to get:
ffmpeg -i background.jpg -vf "movie=input.jpg[inner];[in][inner] overlay=#{offset}:0 [out]" -c:a copy output.jpg
tl;dr: given the first two frames, how could I generate the third frame (as video)?