In fact, video is made up of frames of pictures. In order to modify a person's facial color or face shape, it is first necessary to make clear the motion trajectory of the person in the video. That is to say, what actions have been taken by the characters' faces in the video? According to these actions, key frames have been established and each key frame has been modified.
So your problem can be solved, but it is very hard. Just like the characters in the movie are all decorated, otherwise they won't look so good.
Extended data:
Use AfterEffects software to modify the fatness or glossiness shortcut keys of the characters in the video:
1, create a new project -CTRL+ALT+N, open the project -CTRL+O, only open the project window-press Shift to open the last opened project -CTRL+ALT+Shift+P, save the project -CTRL+S, introduce a material file -CTRL+I, and introduce multiple material files -CTRL+ALT+.
2. Go to the workspace start-Home, to the workspace end-Shift+End, to the last visible key frame -J, and to the next visible key frame-k..
3. Time stamp or key frame to the previous visible layer -Alt+J, time stamp or key frame to the next visible layer -Alt+K, previous frame -Pagedown or left arrow, ten frames forward -Shift+Pagedown or Ctrl+Shift+ left arrow, one frame backward -Pagedown or right arrow, and ten frames backward -Shift+Pagedown or Ctrl+Shift+ right arrow.