.tre Event Logs

Terminal Replay Events (.tre) are JSONL session logs that contain a “frozen serialization” of every ANSI byte sequence emitted during a session.

Phase 1 vs Phase 2

slides-tape splits workflow into two phases:

• Phase 1 (Execution): Executes the native Unix PTY and records bytes + millisecond timestamps to a .tre file.
• Phase 2 (Canvas Draw): Iterates over the log and pushes it through the Rust-powered canvas engine to generate MP4 frames.

⚡ Why are .tre files so powerful?

Because you can skip Phase 1 entirely once you possess a .tre log!

Imagine you are rendering a bash script that naturally clones a Git repository and runs npm install. Evaluating that script takes 5 solid minutes of real-world networking execution. If you need to adjust the Font Size or Speed, you don’t want to wait another 5 minutes.

🚀 How to optimize rendering:

To entirely bypass the physical Unix evaluation and generate a brand new video using the EXACT previously recorded session, inject the --load-events parameter:

slides-tape run deploy.sh --load-events deploy.tre --speed 3.0 --font-size 22

What previously took 5 minutes to simulate will render out into a beautifully adjusted MP4 in 2–3 seconds.

Re-render Tweaks