Overview

Rust-first terminal capture

VHS-style GIFs, screenshots, videos, and terminal snapshots without a browser, terminal server, xterm.js, or ttyd process.

Quick Start →GitHubcrates.io

Betamax reads tape files, runs commands in a real PTY, feeds terminal output through libghostty-vt, rasterizes frames in process with cosmic-text and swash, and writes artifacts for documentation or tests.

GIFs & Screenshots

Generate README demos, release-note animations, final-frame PNGs, and checkpoint screenshots.

FormatGIFPNG

Terminal Testing

Wait for text, capture terminal state, and compare viewport, scrollback, and style spans in snapshot tests.

Test

Ghostty-Based Parsing

Terminal output is interpreted by libghostty-vt, with copied Ghostty themes by name.

Parser

Small & Focused

No xterm.js, no browser, no terminal server, no ttyd process. MP4 and WebM use ffmpeg only for video encoding.

ArchMin

Where To Go Next

Overview

Understand the capture model, output types, and main docs paths.

Quick Start

Get Betamax running in minutes.

Examples

See every checkable tape in the documentation.

Tape File Reference

Read the command, setting, default, and CLI reference.

Output Reference

Understand GIF, PNG, video, screenshot, frame, and state artifacts.

Theme Reference

Style terminal captures with themes, windows, padding, margins, and fills.

Terminal Testing and State JSON

Use state JSON snapshots for terminal test assertions.

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