boltframe/aftereffects-aep-parser

✨ An unofficial parser for Adobe After Effects *.aep project files

aftereffects-aep-parser's Issues

Feature request: Start offset, Playhead position, Start Frame, End Frame

your work is awesome!

Using some hex comparers and editors I discovered where exactly in cdta composition start offset, playhead current frame, composition start frame and composition end frame are stored.

Skipping some bytes after cdta header, there is something stored there with lot's of empty space until Width and Height (pos: 2D0, at [0A, 0B, 0C, 0D]), probably reserved for large values, since all this stored as Frame * 2. I have no idea why it is stored as a multiply of 2, but that's how it is.

So, if it possible, could you please implement this fields for compositions? This would really help me with reading AEP files completely separately from AE.

Also, modifying corresponding values results in a modification of composition, which shown here: YouTube

My discoveries on the AEP format

Just in case someone's interested, I've been trying to figure out more details on the AEP format. I've documented my discoveries in here: https://lottiefiles.github.io/lottie-docs/aep/

I've also written a script that export the contents of an aep file into yaml, destructuring all the binary chunks into more useful data: https://gitlab.com/mattbas/python-lottie/-/blob/master/bin/aep_dump.py

I haven't been able to figure out everything, but I managed to extract information about a lot of different layer types, shapes, keyframes, etc.

Issue: Trying to parse big/old projects results in an error

Honestly speaking, I don't know why this error happened for sure, but with freshly created projects - no problems, with old enough and big projects - this error occures.