74 lines
3.8 KiB
Markdown
74 lines
3.8 KiB
Markdown
# Oak Ridge Makers Group — Tronbyt app
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Loops (~17-18s per run, depending on the slot): zoom into the org logo →
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crossfade into the org name → QR code to https://ormakers.org/ → one
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rotating craft slot, each with a text label at the top. Eight slots cycle
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across runs via a cache counter: 3D Printing, Woodworking, Fiber Craft,
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Electronics, Homelab, Laser Engraving, LoRa Radio (60 frames/~6.0s each — a
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real optical zoom for LoRa, direct variable-size crops from the source
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photo, not a digital Scale transform — smoothly pushing in and back out to
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a wide resting view), and Battle Bots (76 frames/~7.6s, the org's own
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combat-robot CAD-reveal + build footage, the full ~9.5s source clip, not a
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Pexels stock asset). All craft-slot media is cropped and downscaled to
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64x32 — see `CREDITS.md` for sources. Woodworking uses a slightly wider
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(zoomed-out) crop than the others to show more of the table saw surface.
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**Device payload limit:** the Tidbyt/Tronbyt firmware rejects any single
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rendered frame whose Content-Length exceeds ~460,000 bytes and shows a
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built-in "oversize" fallback graphic instead (confirmed from
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`tronbyt/firmware-esp32`'s `main/remote.c` and `Kconfig.projbuild`,
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`HTTP_BUFFER_SIZE_MAX` default 460000). A first draft of the LoRa scene used
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a *continuous* live `animation.Transformation` zoom (100 distinct
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interpolated frames of a busy full-color photo) that rendered to ~504KB and
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tripped this — switched it to the same discrete pre-rendered frame technique
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as the other five slots. Current per-scene sizes (measured via
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`pixlet render --format webp` on each slot in isolation, all at 60 frames):
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~191-228KB for the five video slots, ~313KB for LoRa (real photo detail
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compresses worse than video) — all under the 460KB limit, but LoRa has the
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least headroom (~147KB vs. ~230-270KB for the others). If future edits push
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any slot close to it again, isolate-render and check `stat -c%s` on the
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output before assuming it's fine.
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## Dev/test
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```
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pixlet render ormakers.star -o preview.gif
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pixlet serve ormakers.star # live reload while tuning
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```
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Note: `pixlet render`'s cache resets every invocation, so it always shows the
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first craft slot (3D Printing). To preview a different slot, temporarily
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swap the `_next_craft_scene()` call in `main()` for e.g.
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`_video_scene(HOMELAB_ASSETS, "Homelab")` directly.
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## Rebuilding assets
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- `scripts/crop_logo.py` — crops/pads the org logo into `images/logo.png`.
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- `scripts/fetch_icons.sh` — downloads the (now-unused) game-icons.net craft
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icons; kept for reference only.
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- The `*_clip/` folders under `images/` are frame sequences extracted from
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source video with `ffmpeg` (crop to the desired region, `fps=8`, scale to
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64x32, contrast/saturation boost) or, for `lora_clip`, generated with
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Pillow directly from the full-resolution source photo — each frame crops a
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different-sized box (interpolated wide→tight→wide, ease-in-out) out of the
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original image and resizes that crop to 64x32, giving a real optical zoom
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rather than digitally scaling a single fixed crop (which either does
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nothing past 1.0x scale on a fixed-size widget, or pads with black
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instead of revealing more of the photo). No script currently automates
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this — see CREDITS.md for sources and chat history for the exact crop
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windows/timestamps used per clip.
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- `images/fade_clip/` is generated by blending the resting-state logo frame
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into the name-text frame with Pillow (`Image.blend`), not from video.
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## Deploy
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On the Tronbyt server, go to the device's **Add App** page → **Upload app**,
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and upload a zip of this directory's contents (`ormakers.star` + `images/`,
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zipped at the root, no extra parent folder). It appears under **Custom
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Apps** — add it to the device's schedule from there. Fully private to your
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own server; nothing is published anywhere public.
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## Credits
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See `CREDITS.md` for the source of every craft-slot video/photo.
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