I'm in the process of creating short videos in AE from still photos sequences. Most of these sequences are shot handheld, no tripod. When the sequence is stationary, I can easily stabilize it with the motion tracker stabilizer. However, some of these sequences involve lots of camera motion, and I "stabilize" them manually, frame by frame, by changing the position/rotation/scale of each frame, until the overall camera motion in the sequence appears smooth. Don't worry, I haven't lost my mind, I'm an animator - I like working frame by frame ;-)
I used to do this in Combustion, which has a very usefull onionskin option, so that you can overlay the next/previous frame/s on top of the current frame, as reference. This really speeds things up, eliminating a lot of the guesswork as to how to allign each individual frame.
I cannot for the life of me find such an option in AE, and wondered if anyone can maybe suggest a way to achieve this with an expression.