Add sharp dep (libvips bindings) — fastest option for the per-image
center-crop + Lanczos resize step. Pure-JS alternatives (jimp) and
spawning ffmpeg per image were both ~5-10x slower in this hot loop.
Add src/installer-rp/images.ts:
- ytIdFromUrl: extracts the video ID from watch?v=, youtu.be/, and
/shorts|embed/ URL forms
- downloadImage: for YouTube URLs tries i.ytimg.com/vi/<id>/
maxresdefault.jpg first, falls back to hqdefault.jpg; plain image
URLs go through a generic HTTP/HTTPS GET that follows 302s
- normalizeToCover: center-crop to min(w,h), Lanczos resize down to
1024x1024 when larger, never upscales, writes PNG
- coverFileName: returns cover_NN.png with zero-padded NN
Wire step 2-3 of the install handler to download + normalize each
image into <tempDir>/painting/cover_NN.png. Zip build (step 2-4)
will pick those up next.
Verified with synthetic 1200x800 and 2000x1500 buffers: small
input stays 800x800 (no upscale), large input becomes 1024x1024.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
