Multi-shot films

fire_scale = generate({
    "prompt": (
        "SHOT ONE: extreme macro of a single wooden match dragging across a strike "
        "strip and bursting into flame, sulfur sparks flying, the wood blackening. "
        "HARD CUT. SHOT TWO: wide shot on a dark beach at night, that flame is now a "
        "tall bonfire, sparks climbing into the black, driftwood collapsing in the "
        "heat. HARD CUT. SHOT THREE: high aerial at night, the bonfire is one orange "
        "point among a long chain of bonfires burning down an entire dark coastline, "
        "waves faint below. One continuous low cello drone swells across all three "
        "shots without a break, and the sound of fire scales with the picture: a tiny "
        "crackle in shot one, a full roar in shot two, a vast distant wash of many "
        "fires in shot three. No on-screen text."
    ),
    "aspect_ratio": "16:9",
    "duration": 10,
}, "outputs/04_fire_scale.mp4")

WORLD = (
    "The world: a vast Victorian glasshouse after closing, at night. Moonlight and a "
    "few sodium service lamps glow through fogged, dripping glass. Wet leaves, black "
    "soil, brass pipes and old iron staging. Deep green-and-amber palette, soft film "
    "grain, gentle slow-drifting camera, photorealistic. No on-screen text. "
)

MOTIF = "a slow, sparse celeste melody with a glass-bell tone"

shots = {
    "s1_orchid": {
        "prompt": WORLD + (
            "Wide establishing shot down the dark central aisle of the glasshouse, "
            "mist hanging between the benches, one slow drip falling. A single pale "
            "orchid on the nearest bench slowly turns its face to follow a shaft of "
            f"moonlight. Audio: {MOTIF} enters quietly, under dripping water, creaking "
            "glass, and a faint night wind outside."
        ),
        "aspect_ratio": "16:9", "duration": 5,
    },
    "s2_mimosa": {
        "prompt": WORLD + (
            "Macro shot on a sensitive mimosa plant. A dandelion seed drifts down and "
            "lands on one leaf, and the leaflets fold closed one after another along "
            "the stem, a slow chain reaction in the lamplight. Audio: "
            f"{MOTIF} continues, warmer and a little fuller, over a soft ripple of "
            "tiny leaf-folds and the hum of a service lamp."
        ),
        "aspect_ratio": "16:9", "duration": 5,
    },
    "s3_sunflowers": {
        "prompt": WORLD + (
            "Medium tracking shot along a row of tall potted sunflowers. As a security "
            "lamp's beam sweeps past outside the glass, every sunflower head rotates "
            "in unison to follow it, then holds. Audio: "
            f"{MOTIF} builds, another voice joining it, over the creak of many stems "
            "turning together and the low buzz of the lamp."
        ),
        "aspect_ratio": "16:9", "duration": 5,
    },
    "s4_roof": {
        "prompt": WORLD + (
            "Slow overhead shot looking down through the misted roof glass at the "
            "whole glasshouse. One by one the plants settle still as the first grey "
            "daylight seeps into the panes. Audio: "
            f"{MOTIF} resolves and fades to a single held note under the returning "
            "dawn birdsong through the glass."
        ),
        "aspect_ratio": "16:9", "duration": 5,
    },
}

from concurrent.futures import ThreadPoolExecutor

def run_shots(shots, workers=3):
    """Generate a dict of {name: payload} concurrently; returns {name: path}."""
    with ThreadPoolExecutor(workers) as pool:
        futures = {name: pool.submit(generate, payload, f"outputs/04_{name}.mp4")
                   for name, payload in shots.items()}
        return {name: f.result() for name, f in futures.items()}

LINE = (
    "A carved wooden cuckoo bird snaps out of the little door of an antique cuckoo "
    "clock on a workshop wall, sawdust in the air, dozens of other clocks ticking "
    "around it. It speaks on camera exactly once, its carved beak articulating each "
    "word, the complete sentence with no repetition and no other words in the entire "
    "shot: {spoken} {lock} The camera pushes in slowly on the little door. Audio: its "
    "spoken line, the massed ticking of the workshop clocks, one chain rattle as it "
    "retracts. No on-screen text, no subtitles."
)

takes = {
    f"cuckoo_{name}": {"prompt": LINE.format(spoken=spoken, lock=lock),
           "aspect_ratio": "16:9", "duration": 6}
    for name, spoken, lock in [
        ("fr", "« Le temps, c'est moi qui le dis. »",
         "It speaks entirely in French, every word in French, native accent and "
         "cadence, no English words at all."),
        ("ja", "「時間なら、私が決めます。」",
         "It speaks entirely in Japanese, every word in Japanese, native accent and "
         "cadence, no English words at all."),
        ("ar", "«الوقت أنا من يعلنه.»",
         "It speaks entirely in Arabic, every word in Arabic, native accent and "
         "cadence, no English words at all."),
    ]
}

cuckoos = run_shots(takes)

films = run_shots(shots)

order = ["s1_orchid", "s2_mimosa", "s3_sunflowers", "s4_roof"]
open("/tmp/_join.txt", "w").write(
    "".join(f"file '{os.path.abspath(films[n])}'\n" for n in order))
subprocess.run([FFMPEG, "-y", "-f", "concat", "-safe", "0", "-i", "/tmp/_join.txt",
                "-c:v", "libx264", "-pix_fmt", "yuv420p", "-c:a", "aac",
                "outputs/04_glasshouse_film.mp4"], capture_output=True, check=True)