Pop Art — our demo

One example among many. Don't reuse its story, arc, shots, props or timings.

Demo: The Same Banana 《同一根香蕉》 (52.0 s) · pop-art.mp4 · source in demo/

Why almost every banana in the shops is the same banana, told with the three things pop art does natively: repetition (a clone is a print pulled again and again), the dot screen (a disease is dots growing over the print) and colourways (the way out is one tile flipping to another colour, then a whole wall). An English narrator (Kokoro am_michael) tells it; Chinese and English subtitles are printed on a paper slip. The facts are sourced in demo/FACTS.md.

Story & structure

Logline: one banana poster is copied into a wall; the old banana's prints are eaten black by dots, the new one's wall starts to darken too, and one tile flipping to another colour turns into a thousand kinds of banana that add up to one giant banana.

Arc: hook (coin-sized dots pull back to one print: "the same banana") → copies stamped into a wall ("one plant, copied") → no seeds (cross-section) → each plant grows from the one before (a row of copies) → 1950s: the Gros Michel prints are eaten by dots rising from the soil → the Cavendish replaces it, printed plate by plate, stamped RESISTANT → the clone wall again, a front of dots crosses it (TR4, Colombia 2019), near silence → one tile flips red, a wave of colour flips the wall (1,000+ kinds) → pull back: the tiles' grounds draw a giant banana made of many bananas; end card.

The clone wall appears three times, each time meaning something else: copies, threat, diversity. The opening pull (dots → one banana) and the closing pull (many bananas → one giant banana) mirror each other.

Native moves spent: dot pull (opening), stamped copies (wall), push into a round shape, match cut (disc → cross-section), through a letterform (1950s), dots as data (Panama disease, TR4), plate-by-plate print (Cavendish), colour wave (the turn), mosaic echo (ending).

Shots

Film time; shot starts in SHOTS in demo/timeline.py, everything else derived in demo/main.js.

# Time Shot Camera / transition Move
1 0–4.6 Coin-sized red dots over yellow (the banana's belly shade) → a single print: cobalt ground, paper disc, yellow banana; beside it THE SAME / BANANA. / 同一根香蕉 printed on the sheet log pull ×18 → ×1.45 with 0.55 rad rotation settling dot pull
2 4.6–10.0 Copies stamped in rings around the first print, faster and faster, covering the words; a wall, every copy a little off-register; label ONE PLANT. COPIED. 同一株，複製 pull to ×0.37 with a slight tilt stamped copies
3 10.0–12.9 Push into one paper disc → match cut to a cross-section poster on red; the seed specks ringed one by one; NO / SEEDS. / 沒有種子 0.38 s exponential push, round-to-round cut, small overshoot match cut
4 12.9–16.0 The same long print continues right: yellow field, brown soil; a sucker beside each plant grows into the next, a runner underground links them: ORIGINAL, COPY 01 … 05 lateral track, one plant per beat stamped copies
5 16.0–21.6 1950s slams onto a yellow sheet; through the counter of its 0 the next print already shows; the camera passes through it into an older edition (red ground, dotted yellow sun, the plumper Gros Michel, more age, wider misregistration); label GROS MICHEL / 大麥克 · THE OLD BANANA cut on the slam, push through the letterform, slow push through a letterform
6 21.6–26.6 Pull back to five Gros Michel prints in a row; red and blue dots climb from the bottom, bigger the deeper, eating the prints black left to right; label PANAMA DISEASE / 巴拿馬病 pull to a row dots as data
7 26.6–30.9 Push into the last black print until it fills the frame; it flips like a card into the opening Cavendish print; yellow, red, blue and black plates land one by one, sliding into register; label CAVENDISH / 香芽蕉; a red RESISTANT 抗病 stamp on the poster push, flip, pull back plate-by-plate print
8 30.9–40.45 The clone wall again; a front of red-purple dots crosses it from the left and swallows the RESISTANT stamp; labels TROPICAL RACE 4 / 熱帶 4 號小種, then 2019 → COLOMBIA / 哥倫比亞; from 39.9 near silence big pull, then a slow push, then held dots as data
9 40.45–44.9 The centre tile flips to a red banana on yellow; a wave of flips spreads out: red, blue-green, pink, purple, striped, short, long; label 1,000+ / KINDS OF BANANA / 一千多種香蕉 fast pull colour wave
10 44.9–52.0 Further back: the tiles' grounds (yellow body, orange belly, green stem, blue around) make a giant banana; its black key line is drawn along the tile edges; end card 47.4–52.0 the widest pull, then held mosaic echo

Transitions: stamp, round-to-round match cut, lateral track, cut on a slam, through a letterform, card flip, plate-by-plate print, colour wave; no dissolves, no fades to black.

Voice and subtitles

Eleven cues, fifteen phrase clips (demo/voice/lines.json), placed by the start times in CUES in demo/timeline.py; each clip passes asr_check.py (base.en; asr fields record Whisper's spelling of "Gros Michel" and "Colombia"). Numbers are spelled out in the voice, digits in the subtitles. About 2.2–2.7 words a second, breaths between lines.

Time English 中文
0.50 Almost every banana you buy is the same banana. 你買到的香蕉，幾乎都是同一根香蕉。
4.90 Not just the same kind. The same plant, copied. 不只是同一個品種，是同一株植物的複製。
10.45 The Cavendish has no seeds. 香芽蕉沒有種子。
13.20 Each one grows from a piece of another. 每一株，都是從另一株身上分出來的。
16.85 Your grandparents ate a different banana, the Gros Michel. 你的祖父母吃的是另一種：大麥克。
21.95 In the 1950s, a soil fungus tore through its farms. 1950 年代，一種土壤真菌席捲了它的種植園。
27.05 So the trade switched to the Cavendish, which resisted it. 於是整個行業換成了能抵抗它的香芽蕉。
31.50 Now a new strain, Tropical Race 4, kills the Cavendish as well. 現在，新菌株「熱帶 4 號」連香芽蕉也能殺死。
37.20 In 2019, it reached Colombia. 2019 年，它到了哥倫比亞。
40.80 Yet over 1,000 kinds of banana grow on Earth. 可地球上的香蕉，有一千多種。
45.47 The way out is not one perfect banana. It's many. 出路不是一根完美的香蕉，而是很多種。

Subtitles are printed by the page (paper slip, bottom centre) and exported to pop-art.srt by timeline.py; every cue holds ≥ max(1.8 s, speech + 0.6 s) (shortest 2.67 s).

Score structure

Original 60s exotica, 112 BPM, C major; chords and moods per shot in SECT in demo/mix.py.

Section Time Palette
Intro 0–4.6 vibraphone, marimba motif, shaker
Groove 4.6–16.0 jazz bass on 1 and 3, conga, shaker, vibraphone off-beats, marimba motif every bar (C, F, Am, G)
Retro 16.0–21.6 the groove with a muted-trumpet line (F)
Dark 21.6–26.6 bass pedal, bowed vibraphone, low conga (Dm)
Bright 26.6–30.9 groove with claps, a staccato-trumpet fanfare on the flip (C)
Dark 2 30.9–39.9 bass pedal, bowed vibraphone with a raised third, sparse marimba (Am)
Hush 39.9–40.45 one held contrabass note, music at about −9 dB
Joy 40.45–47.4 trumpet chord and group claps on the turn; one marimba note per flip climbing a C major scale; groove with claps (C, F)
End 47.4–52.0 vibraphone chord, glockenspiel, muted trumpets; 1.6 s fade

Foley from events.json: squeegee and thunk for every printed label, a stamp per copy (thinned once they come fast), whooshes for pulls and dives, a paper snap on the match cut, ticks on the ringed seeds, a thump per grown plant, a slam for 1950s, a crackle bed for each spreading front, a card flick per flip, a thunk per plate, a rubber stamp for RESISTANT, a long friction for the key line. Mix: voice compressed and set 10 dB over the music by RMS, the music losing part of 300 Hz–4 kHz and ducking 45 % under the voice, foley at half level and ducked under the voice; a limiter caps peaks at RMS + 11 dB so the master reaches −14 LUFS under −1 dB true peak.

Palette & props

End card

On the final mosaic, top left, a paper slip tilted −1.4°: MANY BANANAS (Anton 132 px, red), 不止一種香蕉 (Noto Sans SC Black 56 px), POP ART · 波普藝術 (38 px, blue), LemoLab × Claude Opus 5.5 (Archivo Black 34 px). Printed with the slip at 47.4 s and held 4.6 s while the giant banana stays on screen. The "LemoLab × Claude Opus 5.5" sign-off belongs to this library's demo only; a user's film carries no LemoLab credit and no copy of this card.

Build notes

demo/
  build.sh         one command: fonts and voice (if missing) → speech check → timeline + .srt → events → picture → mix → master → readcheck → poster, styleframe
  index.html       one canvas, fonts.css
  main.js          render(t): the wall (stamps, flips, mosaic), shots 1–10, printType, label, subtitles, EV, TEXTS; ?from=&to= renders a span, ?sign10=1 a sign-off label in 7.5–10 s, ?nosubs=1 hides subtitles (poster, styleframe at 42.4 s)
  banana.js        banana, bananaLite, bananaPolys, slice, plant, VAR (colourways)
  engine/pop.js    the print engine (plates, key, spot; dots, misregistration, plate mask, readable text boxes)
  timeline.py      shot starts, narration cues → timeline.json, pop-art.srt
  mix.py           voice + score + foley from timeline.json and events.json → out/mix.wav (with start end: a cut with a short fade)
  voice/lines.json Kokoro am_michael phrases (rendered to out/voice/)
  tools/font_subset.py   Noto Sans SC Black subset for the characters in main.js and timeline.py
  tools/final_asr.py     Whisper on the finished film, line by line against the script
  FACTS.md         sources and wording for every fact