Seedance 2.5 样片模式：先出 480p 样片，满意再出 1080p 成片

curl --request POST \
  --url https://aiunivid.com/api/open/v1/videos/generations \
  --header "Authorization: Bearer $AIUNIVID_API_KEY" \
  --header "Idempotency-Key: $(uuidgen)" \
  --header "Content-Type: application/json" \
  --data '{
    "model": "seedance-2.5-text-to-video",
    "prompt": "A courier hands a parcel to a surprised neighbour in a narrow hallway, handheld camera",
    "duration": 10,
    "aspect_ratio": "9:16",
    "draft": true
  }'

curl --request POST \
  --url https://aiunivid.com/api/open/v1/videos/generations/$DRAFT_TASK_ID/final \
  --header "Authorization: Bearer $AIUNIVID_API_KEY" \
  --header "Idempotency-Key: $(uuidgen)"

import os, time, uuid, requests

BASE = "https://aiunivid.com/api/open"
AUTH = {"Authorization": f"Bearer {os.environ['AIUNIVID_API_KEY']}"}

def post(path, body=None):
    headers = {**AUTH, "Idempotency-Key": str(uuid.uuid4())}
    res = requests.post(BASE + path, json=body or {}, headers=headers, timeout=60)
    res.raise_for_status()
    return res.json()

def wait(task_id):
    while True:
        task = requests.get(f"{BASE}/v1/videos/generations/{task_id}", headers=AUTH, timeout=60).json()
        if task["status"] in ("succeeded", "failed", "cancelled"):
            return task
        time.sleep(15)

draft = wait(post("/v1/videos/generations", {
    "model": "seedance-2.5-text-to-video",
    "prompt": "A courier hands a parcel to a surprised neighbour in a narrow hallway, handheld camera",
    "duration": 10,
    "aspect_ratio": "9:16",
    "draft": True,
})["id"])
print("draft", draft["status"], draft["result"] and draft["result"]["download_url"])

# Only if you like the draft:
final = wait(post(f"/v1/videos/generations/{draft['id']}/final")["id"])
print("final", final["status"], final["result"] and final["result"]["download_url"])

import { randomUUID } from "node:crypto";

const BASE = "https://aiunivid.com/api/open";
const AUTH = { Authorization: `Bearer ${process.env.AIUNIVID_API_KEY}` };

async function post(path, body = {}) {
  const res = await fetch(BASE + path, {
    method: "POST",
    headers: { ...AUTH, "Content-Type": "application/json", "Idempotency-Key": randomUUID() },
    body: JSON.stringify(body),
  });
  const data = await res.json();
  if (!res.ok) throw new Error(`${data.error?.code}: ${data.error?.message}`);
  return data;
}

async function wait(id) {
  for (;;) {
    const task = await (await fetch(`${BASE}/v1/videos/generations/${id}`, { headers: AUTH })).json();
    if (["succeeded", "failed", "cancelled"].includes(task.status)) return task;
    await new Promise((resolve) => setTimeout(resolve, 15_000));
  }
}

const draft = await wait((await post("/v1/videos/generations", {
  model: "seedance-2.5-text-to-video",
  prompt: "A courier hands a parcel to a surprised neighbour in a narrow hallway, handheld camera",
  duration: 10,
  aspect_ratio: "9:16",
  draft: true,
})).id);
console.log("draft", draft.status, draft.result?.download_url);

// Only if you like the draft:
const final = await wait((await post(`/v1/videos/generations/${draft.id}/final`)).id);
console.log("final", final.status, final.result?.download_url);