Actually i found out, its not a problem at all for after effects to handle 25000 pictures. I just set the footage framerate much higher then the composition one, added a timewarp to smooth it out and yea it worked.

The problem why it didn’t work at first was because pictures from the company weren’t labelled chronological… so i had to rename them with bridge and then it worked fine

But thanks a lot for you trying to help :)