Puppeteer full page screenshots for video edits.

pupeteer_full_page.md

Yeah — if your goal is one tall clean still of the entire explorer page so you can do cinematic pans in Resolve/OBS/video editor, you basically want a full-page render, not a screen capture.

Here are the best methods depending on your workflow.

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⭐ Best Overall — Browser Full-Page Screenshot (fast + clean)

Chrome / Edge / Brave (DevTools method)

1. Open your explorer page.
2. Press:
   • Mac: Cmd+Shift+P
   • Windows/Linux: Ctrl+Shift+P
3. Type:

screenshot

4. Choose:

Capture full size screenshot

👉 This outputs a PNG of the entire DOM height, even if it’s 20,000px tall.

Why this is ideal for you:

• Perfect resolution for cinematic scroll edits.
• No viewport limitation.
• Keeps CSS styling exactly.

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⭐ Programmatic Method (best for automation / pipeline)

Since you already run APIs and media pipelines, this fits nicely.

Puppeteer / Playwright screenshot automation

Minimal Node example:

/scripts/capture_fullpage.js

import puppeteer from 'puppeteer';

const url = process.argv[2];

(async () => {
  const browser = await puppeteer.launch({
    headless: "new",
    defaultViewport: null
  });

  const page = await browser.newPage();
  await page.goto(url, { waitUntil: 'networkidle0' });

  await page.screenshot({
    path: 'fullpage.png',
    fullPage: true
  });

  await browser.close();
})();

Run:

node capture_fullpage.js http://localhost:8787/explorer

Why THIS matches your ecosystem:

• Automatable in your media-sync-api.
• Could generate thumbnails or “scroll plates.”
• Works headless on Pi cluster too.

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⭐ If You Want MAX Quality (cinematic production)

Instead of PNG screenshot:

Render huge virtual viewport then capture

Example Puppeteer tweak:

await page.setViewport({
  width: 3840,
  height: 20000,
  deviceScaleFactor: 2
});

This gives:

• Ultra-crisp scroll plates
• Ideal for 4K/vertical video pan shots

(You can easily oversample and downscale in editing.)

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⭐ OBS-Friendly Alternative (no browser tools)

If you want to stay inside OBS ecosystem:

Method:

1. Load page as browser source.
2. Set extremely tall height (example 8000 px).
3. Use Source Record plugin or screenshot plugin.

BUT:

👉 OBS sometimes struggles with large GPU textures.
Browser capture tools are safer.

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⭐ If Explorer Uses Lazy Loading (important)

Common gotcha.

Before screenshot:

• Scroll page to bottom once
• Or disable lazy loading in explorer UI
• Or force asset prefetch mode

Otherwise half the thumbnails may be blank.

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⭐ Bonus Tip (Huge For Your Editing Workflow)

Once you have the tall image:

In DaVinci Resolve:

• Import PNG
• Add to timeline
• Use Transform → Position Y keyframes
• Add easing curves
• Add blur / vignette for depth

This looks VERY cinematic.

You’re basically simulating:

“Camera gliding over a digital landscape.”

Which fits perfectly with your overlay architecture videos.

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⭐ My honest recommendation for YOU specifically

Given:

• media-sync-api
• explorer UI
• cinematic production
• DaVinci workflow
• Raspberry Pi automation

👉 Automate Puppeteer capture as an API endpoint.

Then you can:

• Generate scroll plates on demand
• Store in MinIO or local DAM
• Reuse across videos
• Version them with projects

That aligns directly with your whole ecosystem.

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If you want next, I can give:

✅ Python version (fits your API better)
✅ FFmpeg pan animation from the image
✅ Automated batch capture for multiple pages
✅ Direct OBS integration workflow
✅ Or cinematic editing recipe for Resolve

Just say 👍