BASE=https://api.nunchux.com

# 1. Submit
SUBMIT=$(curl -sS --fail-with-body "$BASE/v1/vidu/video/img2video" \
  -H "X-API-Key: $NUNCHUX_API_KEY" \
  -H "Content-Type: application/json" \
  -H "User-Agent: YourApp/1.0" \
  -d '{
    "model": "viduq4-preview",
    "images": ["https://example.com/frame.jpg"],
    "prompt": "the astronaut waves and the camera rises",
    "duration": 5,
    "resolution": "720p",
    "audio": false
  }') || { echo "submit failed: $SUBMIT" >&2; exit 1; }
TASK=$(jq -er '.task_id' <<<"$SUBMIT") || { echo "no task_id in: $SUBMIT" >&2; exit 1; }

# 2. Poll until the state is terminal
DELAY=5
for _ in $(seq 1 90); do
  RESP=$(curl -sS "$BASE/v1/vidu/video/$TASK" \
    -H "X-API-Key: $NUNCHUX_API_KEY" \
    -H "User-Agent: YourApp/1.0")
  STATE=$(jq -r '.state // ""' <<<"$RESP")
  case "$STATE" in success|failed) break ;; esac
  sleep "$DELAY"; DELAY=$(( DELAY * 2 > 30 ? 30 : DELAY * 2 ))
done

# 3. Check for failure
[ "$STATE" = "success" ] || { echo "task $STATE: $(jq -r '.error.message // "no error"' <<<"$RESP")" >&2; exit 1; }

# 4. Download
curl -sSL -o vidu.mp4 "$(jq -r '.creations[0].url' <<<"$RESP")"

# pip install requests
import os, time, requests

BASE = "https://api.nunchux.com"
HEADERS = {
    "X-API-Key": os.environ["NUNCHUX_API_KEY"],
    "User-Agent": "YourApp/1.0",
}

# 1. Submit
submit = requests.post(
    f"{BASE}/v1/vidu/video/img2video",
    headers=HEADERS,
    json={
        "model": "viduq4-preview",
        "images": ["https://example.com/frame.jpg"],
        "prompt": "the astronaut waves and the camera rises",
        "duration": 5,
        "resolution": "720p",
        "audio": False,
    },
)
if not submit.ok:
    raise RuntimeError(f"submit failed: HTTP {submit.status_code} {submit.text}")
task = submit.json()["task_id"]

# 2. Poll until the state is terminal
delay = 5
for _ in range(90):
    data = requests.get(f"{BASE}/v1/vidu/video/{task}", headers=HEADERS).json()
    state = data.get("state", "")
    if state in ("success", "failed"):
        break
    time.sleep(delay)
    delay = min(delay * 2, 30)
else:
    raise TimeoutError("Vidu task did not reach a terminal state")

# 3. Check for failure
if state != "success":
    raise RuntimeError(f"Vidu task {state}: {data.get('error')}")

# 4. Download
with requests.get(data["creations"][0]["url"], stream=True, timeout=300) as r:
    r.raise_for_status()
    with open("vidu.mp4", "wb") as f:
        for chunk in r.iter_content(1 << 14):
            f.write(chunk)