Adobe After Effect project file

And AEPX (Adobe After Effect project XML file)

Use Resource Interchange File Format (RIFF) in a Big-Endian byte-ordering (RIFX), see Resource Interchange File Format - Wikipedia

• Parsing AEP Files - Lottie Docs

• lib/lottie/importers/aep.py · master · Glax / python-lottie · GitLab

• pt_OpenSesame - aescripts.com

• boltframe/aftereffects-aep-parser: ✨ An unofficial parser for Adobe After Effects *.aep project files

• rioam2/rifx: 🔍 Binary parsing module for RIFX files (Big-Endian variant of the Resource Interchange File Format, aka RIFF). Commonly used for media files such as AVI, ANI & WAV

• aftereffects-version-check/ae-builds.json at main · tinogithub/aftereffects-version-check

You need a file editor like bbedit that will open the file into what looks like a text document. [...] Next open the saved file in bbedit.