thumbnail-of-pptx

Thumbnail of a PPTX slide

Run the thumbnail_of_pptx.py script to capture a slide thumbnail from a OneDrive/Office presentation link:

uv run .agents/skills/thumbnail-of-pptx/thumbnail_of_pptx.py <url> <output_path>

Arguments

• url (required): A OneDrive sharing link, or an aka.ms short link that redirects to one (e.g. https://aka.ms/my-talk-slides). The link must open the Office Online / PowerPoint web viewer.
• output_path (required): Path to write the PNG thumbnail (e.g. thumbnail.png). Parent directories are created if needed.
• --slide N (optional): 1-based slide number to capture. Defaults to 1, the title slide.
• --scale N (optional): Device scale factor for a crisper image. Defaults to 2.
• --wait MS (optional): Milliseconds to wait for the slide to render before screenshotting. Defaults to 9000. Increase for large decks or slow networks.

Outputs

A single PNG image of the requested slide, cropped to the slide canvas (roughly 16:9, no PowerPoint viewer UI).

Prerequisites

Playwright browsers must be installed:

uv run playwright install chromium

How it works

1. Launches headless Chromium and navigates to the URL (following aka.ms redirects to the real OneDrive viewer).
2. Waits for the network to go idle, then waits a fixed delay for the Office Online viewer to stream in and paint the slide.
3. Locates the viewer iframe (named wacIframe, with a fallback that finds any frame containing a <canvas>).
4. Optionally advances to slide N by focusing the canvas and pressing the right-arrow key.
5. Element-screenshots the slide <canvas> so the output contains only the slide, not the surrounding viewer chrome.

Notes

• This is complementary to fetch-slides: use fetch-slides when you need the full deck as a PDF (requires LibreOffice for PPTX), and this skill when you just want a lightweight thumbnail image of one slide and the file may not be downloadable.
• Because it relies on the public web viewer, the sharing link must be viewable by anyone with the link.