Timelapse on after effects I have got 90 pictures of a building site (one per work day), and I would like to get about 10 seconds of video.
So, I would like to know how to generate image between my images on after effects (CS6) to get a smoother time lapse video ?

Thx in advance !
The most-recommended way to do this is with Twixtor, a pricey plugin for AE and other platforms. They offer a watermarked free trial. There are some free alternatives out there but I haven't used them so I can't say for sure they'll suit your need. One is SloMoVideo and if you google that you'll see videos from people who've tried it.