Seedance 2.0・2.5 動画生成API：料金と使い方

ベースURL: https://api.laozhang.ai/seedance/api/v3

タスクの作成            POST /contents/generations/tasks
タスクの状態・結果の取得  GET  /contents/generations/tasks/{id}

MP4のダウンロード（SeedanceのベースURLとは別の互換エンドポイント）:
                        GET  https://api.laozhang.ai/v1/videos/{id}/content

費用 = トークン単価 × トークン使用量
トークン使用量 ≈ (入力動画の長さ + 出力動画の長さ) × 出力の幅 × 出力の高さ × フレームレート / 1024

export LAOZHANG_API_KEY="YOUR_API_KEY"   # 自分のLaoZhang APIキーに置き換える

curl -sS -X POST "https://api.laozhang.ai/seedance/api/v3/contents/generations/tasks" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  --data-raw '{
    "model": "doubao-seedance-2-0-fast-260128",
    "content": [
      {
        "type": "text",
        "text": "一人称視点のりんごフルーツティーの広告、4秒、テンポの速いカット割り、りんごティーを作る工程と完成品を見せる、爽やかで明るい雰囲気"
      }
    ],
    "ratio": "16:9",
    "duration": 4,
    "resolution": "720p",
    "watermark": false,
    "generate_audio": false,
    "return_last_frame": true
  }' | tee create.json

{
  "id": "cgt-example-task-id"
}

curl -sS -X POST "https://api.laozhang.ai/seedance/api/v3/contents/generations/tasks" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  --data-raw '{
    "model": "doubao-seedance-2-0-260128",
    "content": [
      {
        "type": "text",
        "text": "先頭フレームは画像1、最後のフレームは画像2。赤いりんごの商品のクローズアップから、完成したりんごフルーツティーのカップまでを、なめらかなトランジションでつなぐ商品CMにする。商品の見た目は一貫させ、人物は登場させない。"
      },
      {
        "type": "image_url",
        "image_url": {
          "url": "https://ark-project.tos-cn-beijing.volces.com/doc_image/r2v_tea_pic1.jpg"
        },
        "role": "first_frame"
      },
      {
        "type": "image_url",
        "image_url": {
          "url": "https://ark-project.tos-cn-beijing.volces.com/doc_image/r2v_tea_pic2.jpg"
        },
        "role": "last_frame"
      }
    ],
    "ratio": "adaptive",
    "duration": 4,
    "resolution": "720p",
    "watermark": false,
    "generate_audio": false,
    "return_last_frame": true
  }' | tee create.json

curl -sS -X POST "https://api.laozhang.ai/seedance/api/v3/contents/generations/tasks" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  --data-raw '{
    "model": "doubao-seedance-2-0-fast-260128",
    "content": [
      {
        "type": "text",
        "text": "りんごの商品ディテールは画像1、一人称視点のカメラワークは動画1を参考にし、音声1をBGMに使う。素材を手早くカットでつなぎ、最後に完成したカップをクローズアップで見せる、簡潔なりんごフルーツティーのCMを作る。"
      },
      {
        "type": "image_url",
        "image_url": {
          "url": "https://ark-project.tos-cn-beijing.volces.com/doc_image/r2v_tea_pic1.jpg"
        },
        "role": "reference_image"
      },
      {
        "type": "video_url",
        "video_url": {
          "url": "https://ark-project.tos-cn-beijing.volces.com/doc_video/r2v_tea_video1.mp4"
        },
        "role": "reference_video"
      },
      {
        "type": "audio_url",
        "audio_url": {
          "url": "https://ark-project.tos-cn-beijing.volces.com/doc_audio/r2v_tea_audio1.mp3"
        },
        "role": "reference_audio"
      }
    ],
    "ratio": "16:9",
    "duration": 4,
    "resolution": "720p",
    "watermark": false,
    "generate_audio": true
  }' | tee create.json

GET https://api.laozhang.ai/seedance/api/v3/contents/generations/tasks/{id}

TASK_ID=$(jq -r '.id' create.json)

curl -sS "https://api.laozhang.ai/seedance/api/v3/contents/generations/tasks/$TASK_ID" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Accept: application/json" | tee task.json | jq -r '.status'

{
  "id": "cgt-example-task-id",
  "model": "doubao-seedance-2-0-fast-260128",
  "status": "succeeded",
  "ratio": "16:9",
  "duration": 4,
  "resolution": "720p",
  "content": {
    "video_url": "https://example.com/generated-video.mp4",
    "last_frame_url": "https://example.com/last-frame.jpeg"
  },
  "usage": {
    "completion_tokens": 87300,
    "total_tokens": 87300
  }
}

GET https://api.laozhang.ai/v1/videos/{id}/content

VIDEO_URL=$(jq -r '.content.video_url // .result_url // .data.content.video_url // empty' task.json)
curl -L -o seedance-output.mp4 "$VIDEO_URL"

curl -L "https://api.laozhang.ai/v1/videos/$TASK_ID/content" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -o seedance-output.mp4

import os
import time

import requests

API_KEY = os.environ["LAOZHANG_API_KEY"]
BASE_URL = "https://api.laozhang.ai/seedance/api/v3"
DOWNLOAD_URL = "https://api.laozhang.ai/v1/videos/{task_id}/content"
PENDING = {"queued", "running"}
SUCCESS = {"succeeded", "completed"}
POLL_INTERVAL = 15   # 状態を確認する間隔（秒）
TIMEOUT = 20 * 60    # 20分で待機を打ち切る。長い動画では値を大きくする

HEADERS = {
    "Authorization": f"Bearer {API_KEY}",
    "Accept": "application/json",
    "Accept-Encoding": "identity",
}


def task_status(task):
    status = task.get("status")
    if status is None and isinstance(task.get("data"), dict):
        status = task["data"].get("status")
    return str(status or "").lower()


def find_video_url(task):
    data = task.get("data") if isinstance(task.get("data"), dict) else {}
    for content in (task.get("content"), data.get("content")):
        if isinstance(content, dict) and content.get("video_url"):
            return content["video_url"]
    return task.get("result_url")


payload = {
    "model": "doubao-seedance-2-0-fast-260128",
    "content": [
        {
            "type": "text",
            "text": "一人称視点のりんごフルーツティーの広告、4秒、テンポの速いカット割り、爽やかで明るい雰囲気",
        }
    ],
    "ratio": "16:9",
    "duration": 4,
    "resolution": "720p",
    "watermark": False,
    "generate_audio": False,
    "return_last_frame": True,
}

create_resp = requests.post(
    f"{BASE_URL}/contents/generations/tasks",
    headers=HEADERS,
    json=payload,
    timeout=60,
)
create_resp.raise_for_status()
task_id = create_resp.json()["id"]
print("タスクID:", task_id)

deadline = time.monotonic() + TIMEOUT
while True:
    query_resp = requests.get(
        f"{BASE_URL}/contents/generations/tasks/{task_id}",
        headers=HEADERS,
        timeout=60,
    )
    query_resp.raise_for_status()
    task = query_resp.json()
    status = task_status(task)
    print("状態:", status)

    if status in SUCCESS:
        break
    if status not in PENDING:
        raise RuntimeError(f"タスク {task_id} は状態 {status!r} で終了しました: {task}")
    if time.monotonic() > deadline:
        raise TimeoutError(f"タスク {task_id} が {TIMEOUT // 60} 分以内に完了しませんでした")
    time.sleep(POLL_INTERVAL)

video_url = find_video_url(task)
if video_url:
    # 署名付きURLなので、Authorizationヘッダーを付けずにダウンロードする
    video_resp = requests.get(video_url, timeout=300)
else:
    video_resp = requests.get(
        DOWNLOAD_URL.format(task_id=task_id),
        headers={"Authorization": f"Bearer {API_KEY}", "Accept": "video/mp4,*/*"},
        timeout=300,
    )
video_resp.raise_for_status()
with open(f"{task_id}.mp4", "wb") as output:
    output.write(video_resp.content)
print(f"保存しました: {task_id}.mp4")

POST https://api.laozhang.ai/seedance/api/v3/contents/generations/tasks