I've been trying for hours to remove my white (well, grayish white) background from a video, and I thought you could remove it with keying nodes in the compositor (cycles). I managed to get somewhat close, but it still has pieces of white, and it affects the colour of my sunglasses. I've tried tutorials meant for green screens, keying/chroma/difference/luminosity nodes, but I just can't figure out the right settings. Core matte mask helped a little, but made it impossible because my body moves in the video. I played around with the keying colour a lot, and nothing seems to help.
Is this possible or is a green screen absolutely necessary?
I've attached the .blend file with a screenshot rather than the whole video due to file size, but I imagine it's the same principle.
Here's a screenshot of the original image:
Here's the node setup:
Thanks in advance!