I have tried on the attached video to roto the woman and i found it extremely hard.
So, i remember that whenever you are struggling with roto, you need to divide it into a small portions.
So i started by just tracking her lower leg… and the plan was to use this layer track, as a track to a precise Roto mask.
However, no matter what i did no matter how i followed the rules i needed to add keyframes time and time again to set the mask to its path.
My only question is, is that notmal in such case to have so many keyframes?