after-effects

You can automate After Effects tasks by generating and executing ExtendScript (JSX) to edit layers, keyframes, expressions, effects, and compositions. Provide a task description and the system runs the corresponding JSX action on the active composition.

Yes, batch editing multiple comps in After Effects on macOS is supported. The system generates deterministic, undoable ExtendScript actions to handle operations across multiple compositions for consistent production pipelines.

To run ExtendScript in After Effects on macOS, you need scripting permissions enabled. Specifically, enable "Allow Scripts to Write Files and Access Network" so the generated JSX scripts can execute properly via osascript.

After Effects automation works for render preparation and project organization by generating ExtendScript to handle assets and renders. It enables deterministic automation for batch edits, project organization, and reproducible results across compositions.

After Effects ExtendScript automation requires osascript on macOS because the system uses it to run the generated JSX scripts. This allows deterministic, undoable actions to be executed directly within the After Effects environment.

The best way to automate keyframes and expressions in After Effects is by generating ExtendScript (JSX) to perform the edits. This approach enables deterministic, undoable actions across multiple steps for consistent, reproducible results.