Scenario 1 :
Let’s say we have 2 sources of a scene. One source is in colour, the second one is in black and white, both are the same version of the same shot, properly aligned of course, but the black and white version is a few seconds longer.

Scenario 2 :
Let’s say we have a deleted scene in black and white. And at the same time we have several still frames taken from the same scene, and thee frames are in full colour.

Is there a way how to “extract” the colour information from the colour footage / frames and use if for automatic or pseudo-automatic colorization of the black and white segments?