如何降低 AI 视频 API 成本：七种实用方法

import os
import time
import uuid

import requests

API = "https://api.revana.si/v1"
KEY = os.environ["REVANA_API_KEY"]


def run(model, inp, max_cost_usd):
    key = str(uuid.uuid4())  # resend with this key after a network error: no duplicate job
    headers = {"Authorization": f"Bearer {KEY}", "Idempotency-Key": key}
    body = {"model": model, "input": inp, "max_cost_usd": max_cost_usd}
    job = requests.post(f"{API}/generations", headers=headers, json=body).json()
    while job["status"] in ("queued", "running"):
        time.sleep(5)
        job = requests.get(f"{API}/generations/{job['id']}", headers=headers).json()
    return job


prompts = [
    "A red kite climbs over a windy beach, the camera tracking it from the sand.",
    "A red kite climbs over a windy beach, seen from above as it rises toward the camera.",
    "A child runs along a windy beach pulling a red kite into the sky, slow motion.",
]

# 1. A cheap 480p draft of each idea
drafts = [run("seedance-2.5", {"prompt": p, "resolution": "480p", "duration": 8}, 1.1)
          for p in prompts]
for p, d in zip(prompts, drafts):
    print(d["status"], d.get("cost_usd"), d["output"]["urls"][0] if d["output"] else d["error"])

# 2. Render only the idea you liked, at 1080p
final = run("seedance-2.5", {"prompt": prompts[1], "resolution": "1080p", "duration": 8}, 5.3)
print(final["status"], final.get("cost_usd"))