Suddenly the file I've imported in After Effects splits into two divided parts as long as you want it to show the whole image at once. While it's in 50% or larger, as long as you just see parts of the picture, it's okay.
very strange. does this only happen with video? try isolating the issue as much as you can. does the video play nice in VLC Player? this could be a codec problem or a GPU driver problem. make sure your GPU driver is up to date and that you have quicktime installed - essential components. see if this happens with other version of Ae (you can install them alongside if you have a paid CC subscription)
What exaxct footage are you using? This looks like a hardware acceleration and/or CoDec issue.
Did you solve this issue yet? If so, how?