Why CUSTRA exists: stop screenshotting, start listening

In every meeting or online class, the hardest part is not the content — it's keeping up. Slides flip, demos move fast, and key conclusions appear for just a few seconds. Your attention gets split between listening, taking screenshots, and trying to keep decent notes.

CUSTRA is a local-first capture assistant. You select a region inside a Zoom / Teams / Tencent Meeting window or a live stream — slides, subtitles, chat, or any part of the screen — and CUSTRA samples it once per second, comparing each frame with the last saved one. When the view changes meaningfully, it saves a new PNG; optional loop capture can save every N seconds as a safety net. On Windows, you can also capture system audio.

The result is not a huge video file. It's a clean folder of time‑stamped images (and an optional audio file) that match the rhythm of the session — perfect for review and note‑taking.

The problem CUSTRA solves

In real meetings and classes, the pain point is rarely “no content”. It's “I couldn't capture the important parts in time”. You're:

• Listening while the presenter flips through slides, demos, and key conclusions.
• Trying to screenshot and take notes at the same time, splitting your attention.
• Scrubbing through chat logs or recordings afterwards, just to find one specific page.

CUSTRA is designed to reduce that friction: you set it up once per session, then stay focused on the speaker while it quietly captures the key frames for you.

Why CUSTRA is different

• Less manual work: from “N manual screenshots” to “select once, pick up the results in output/ afterwards”.
• Fewer junk images: only save when the content changes (plus optional loop capture), so the output matches the real pace of the session.
• Local-first privacy: no account, no upload. Files stay on your machine and under your control.

Typical scenarios

• Online courses / bootcamps: slides, code examples, and whiteboard content change frequently — keep the key pages automatically.
• Zoom / Teams / Tencent Meeting: shared screens, design reviews, product demos — keep a visual record of important points.
• Live streams / public talks: subtitles, title cards, and key explanations for easier recap or content creation.
• Interviews / remote demo calls: preserve key flows and pages as local evidence (with consent and compliance in mind).
• Book clubs / study groups: capture changing pages in shared documents so you can revisit them along a timeline.

Who CUSTRA is for

• Students and exam takers: automatically collect key slides and worked examples from online courses.
• Professionals: reduce the mental load of screenshotting during weekly meetings, reviews, trainings, and town halls.
• Instructors and TAs: quickly locate “that slide” when answering questions or reviewing course pacing.
• Content creators: capture key frames from live or recorded sessions for editing and repurposing.
• Researchers and consultants: organize visual material from online sessions, while staying within compliance.

How CUSTRA works

• Click to start CUSTRA.
• Drag to select a region on screen (slides, subtitles, chat, etc.).
• The first frame is always saved.
• Every second, CUSTRA samples the region and compares it with the last saved frame.
• Two save rules: change-triggered saving, and optional loop capture that saves every N seconds as a fallback.
• When you stop, CUSTRA automatically archives the session into a task folder with images (and optional audio).

Feature highlights

• Minimal controls: a handful of buttons (start, audio, settings) so you can learn it in seconds.
• Multi-monitor aware: capture stays on the screen where you select, without crossing monitors.
• Timestamped filenames: include system time (with timezone and milliseconds) and in-session timing for easier alignment with notes.
• Optional Windows system audio capture: a single audio.wav per task, so you can replay important segments.
• Tray-friendly: can run in the system tray without taking up taskbar space.

Privacy & data

• No uploads: outputs are written to a local output/ directory.
• You stay in control: delete, copy, encrypt, or archive the files however you like.

CUSTRA exists so you can stop splitting your attention between screenshotting and listening — and still walk away with a clean, reviewable record of what mattered.