.AEP

Introduction

An .aep file is a project saved by Adobe After Effects, the motion graphics and compositing program. It holds the project panel of imported footage, the compositions with their layers, keyframes, masks, effects and expressions, and the render queue.

Like other editing projects, it refers to footage, images and audio by their paths rather than containing them. After Effects can also save a project as XML with the extension .aepx, which other tools can read more easily.

Structure

An AEP file is a RIFX file, the big-endian form of RIFF. It starts with the chunk ID RIFX, a 32-bit big-endian size and the form type Egg!. Inside are nested chunks and LIST chunks, each with a four-letter ID, a size and the data. The meaning of the individual chunks is not published by Adobe.

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