stitched-full-page-capture

Scroll the page once to warm lazy content, return to the top, then capture viewport-sized slices with about 2 seconds of settle time after each scroll stop. Stitch the slices vertically into one full-page image rather than relying on the browser's native fullPage capture.

Native fullPage captures render the page in one shot, so lazy-loaded media and scroll-triggered reveal animations never mount, leaving blank or gray bands. Pages built with Framer or using WebGL/canvas are especially prone to this even when a scroll video looks correct.

Run the stitch_full_page_capture.mjs script with the article's manifest.json, optionally passing --item to repair a single entry. It reopens the live page, captures stitched viewport slices, regenerates section crops, and updates the manifest with corrected coordinates.

The default viewport is 1440x1100 with a 950-pixel scroll step so slices overlap slightly, plus a 2000 ms wait after each stop. Use a step smaller than the viewport height to avoid gaps between stitched segments.

Reject captures with blank, gray, or white bands, very low visual content, missing lazy-loaded sections, an extremely narrow content column, or disagreement with the scroll video. Validate the stitched image against the representative still, MP4, and motion frames before accepting it.