.AEC File Extension

File exported by Cinema 4D, a program used for video production; saves a rendered video in a format that can be imported into Adobe After Effects, but only if the proper plug-in has been installed for After Effects; used for transferring video projects from Cinema 4D to After Effects.

If your version of After Effects does not import an AEC file properly, check to make sure that you have the latest AEC importer plug-in installed.