# Seedance 2.5 API ドキュメント

> AI Studio API で Seedance 2.5 モデルを使用して動画を生成します。

## 概要

AI Studio API を使用して Seedance 2.5 の生成タスクを作成し、タスク状態を確認します。処理は非同期です。まずタスクを作成して `taskId` を取得し、その後タスク API で結果を確認します。

## 認証

すべてのリクエストで `Authorization` ヘッダーに API Key が必要です。

```http
Authorization: Bearer YOUR_API_KEY
```

## 利用可能なモデル

| modelId | バージョン | プロバイダー | 実行モデル |
| --- | --- | --- | --- |
| `video:fal-bytedance-seedance-2-5-text-to-video` | Text to Video | ByteDance | bytedance/seedance-2.5/text-to-video |
| `video:fal-bytedance-seedance-2-5-image-to-video` | Image to Video | ByteDance | bytedance/seedance-2.5/image-to-video |
| `video:fal-bytedance-seedance-2-5-reference-to-video` | Reference to Video | ByteDance | bytedance/seedance-2.5/reference-to-video |
| `video:bytedance-seedance-2-5` | Seedance 2.5 | Bytedance Seedance 2.5 | bytedance/seedance-2-5 |

## 1. 生成タスクを作成

### エンドポイント

```http
POST https://localhost:3000/api/ai-studio/execute
Content-Type: application/json
Authorization: Bearer YOUR_API_KEY
```

### リクエスト例

```json
{
  "modelId": "video:fal-bytedance-seedance-2-5-text-to-video",
  "isPublic": true,
  "payload": {
    "generate_audio": true,
    "resolution": "720p",
    "duration": "auto",
    "prompt": "An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea.",
    "end_user_id": "",
    "bitrate_mode": "standard",
    "aspect_ratio": "auto"
  }
}
```

### 成功レスポンス

```json
{
  "success": true,
  "data": {
    "modelId": "video:fal-bytedance-seedance-2-5-text-to-video",
    "generationId": "generation-id",
    "reservedCredits": 20,
    "taskId": "provider-task-id",
    "state": "queued"
  }
}
```

## 2. タスク状態を確認

### エンドポイント

```http
GET https://localhost:3000/api/ai-studio/tasks/{taskId}
Authorization: Bearer YOUR_API_KEY
```

### 成功レスポンス

```json
{
  "success": true,
  "data": {
    "generationId": "generation-id",
    "taskId": "provider-task-id",
    "modelId": "video:fal-bytedance-seedance-2-5-text-to-video",
    "state": "succeeded",
    "mediaUrls": [
      "https://example.com/result.mp4"
    ],
    "reservedCredits": 20,
    "refundedCredits": 0
  }
}
```

## リクエストフィールド

### Text to Video

#### Payload フィールド

| フィールド | タイプ | 必須 | デフォルト / 例 | 選択肢 | 説明 |
| --- | --- | --- | --- | --- | --- |
| `generate_audio` | boolean | いいえ | `true` | - | Whether to generate synchronized audio for the video, including sound effects, ambient sounds, and lip-synced speech. The cost of video generation is the same regardless of whether audio is generated or not. |
| `resolution` | enum | いいえ | `"720p"` | 480p, 720p, 1080p | Video resolution - 480p for faster generation, 720p for balance, 1080p for high quality. |
| `duration` | enum | いいえ | `"auto"` | auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 | Duration of the video in seconds. Supports 4 to 30 seconds, or auto to let the model decide based on the prompt. |
| `prompt` | string | はい | `"An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."` | - | The text prompt used to generate the video |
| `end_user_id` | object | いいえ | `-` | - | The unique user ID of the end user. |
| `bitrate_mode` | enum | いいえ | `"standard"` | standard, high | Output bitrate mode. 'high' requests a higher-quality, larger-file encode from the model; 'standard' uses the default bitrate. |
| `aspect_ratio` | enum | いいえ | `"auto"` | auto, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | The aspect ratio of the generated video. Use 16:9 for landscape, 9:16 for portrait/vertical, 1:1 for square, 21:9 for ultrawide cinematic, or auto to let the model decide. |

#### input フィールド

_このモデルのフィールド設定はありません。_

### Image to Video

#### Payload フィールド

| フィールド | タイプ | 必須 | デフォルト / 例 | 選択肢 | 説明 |
| --- | --- | --- | --- | --- | --- |
| `duration` | enum | いいえ | `"auto"` | auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 | Duration of the video in seconds. Supports 4 to 30 seconds, or auto to let the model decide based on the prompt. |
| `prompt` | string | はい | `"An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."` | - | The text prompt describing the desired motion and action for the video. |
| `generate_audio` | boolean | いいえ | `true` | - | Whether to generate synchronized audio for the video, including sound effects, ambient sounds, and lip-synced speech. The cost of video generation is the same regardless of whether audio is generated or not. |
| `image_url` | string | はい | `"https://v3b.fal.media/files/b/0a8eba37/Cqg-4Uwzyz4DELfceT1CF_a17e588773ec45b1a9e6f100a787b80b.jpg"` | - | The URL of the starting frame image to animate. Supported formats: JPEG, PNG, WebP. Max 30 MB. |
| `resolution` | enum | いいえ | `"720p"` | 480p, 720p, 1080p | Video resolution - 480p for faster generation, 720p for balance, 1080p for high quality. |
| `end_image_url` | object | いいえ | `-` | - | The URL of the image to use as the last frame of the video. When provided, the generated video will transition from the starting image to this ending image. Supported formats: JPEG, PNG, WebP. Max 30 MB. |
| `end_user_id` | object | いいえ | `-` | - | The unique user ID of the end user. |
| `bitrate_mode` | enum | いいえ | `"standard"` | standard, high | Output bitrate mode. 'high' requests a higher-quality, larger-file encode from the model; 'standard' uses the default bitrate. |
| `aspect_ratio` | string | いいえ | `"auto"` | - | The aspect ratio of the generated video. Always "auto" for image-to-video |

#### input フィールド

_このモデルのフィールド設定はありません。_

### Reference to Video

#### Payload フィールド

| フィールド | タイプ | 必須 | デフォルト / 例 | 選択肢 | 説明 |
| --- | --- | --- | --- | --- | --- |
| `task` | enum | いいえ | `"reference"` | reference, editing, extension | The type of video generation task. Reference uses the supplied media as guidance. Editing modifies a reference video and automatically coerces aspect_ratio and duration to auto. Extension continues a reference video and automatically coerces aspect_ratio to auto. |
| `bitrate_mode` | enum | いいえ | `"standard"` | standard, high | Output bitrate mode. 'high' requests a higher-quality, larger-file encode from the model; 'standard' uses the default bitrate. |
| `duration` | enum | いいえ | `"auto"` | auto, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 | Duration of the video in seconds. Supports 4 to 30 seconds, or auto to let the model decide based on the prompt. |
| `prompt` | string | はい | `"An octopus finds a football in the ocean and excitedly calls its octopus friends to come and play. Cut scene to an octopus football game under the sea."` | - | The text prompt used to generate the video. |
| `video_urls` | string[] | いいえ | `-` | - | Reference videos to guide video generation. Refer to them in the prompt as @Video1, @Video2, etc. Supported formats: MP4, MOV. Up to 10 videos. Each video must be 1.8 to 30.2 seconds and no larger than 200 MB; combined duration must not exceed 30.2 seconds. Dimensions must be 300 to 6,000 pixels per side, aspect ratio 0.4 to 2.5, and frame rate 24 to 60 FPS. |
| `generate_audio` | boolean | いいえ | `true` | - | Whether to generate synchronized audio for the video, including sound effects, ambient sounds, and lip-synced speech. The cost of video generation is the same regardless of whether audio is generated or not. |
| `audio_urls` | string[] | いいえ | `-` | - | Reference audio to guide video generation. Refer to them in the prompt as @Audio1, @Audio2, etc. Supported formats: MP3, WAV. Up to 10 files. Each file must be 1.8 to 30.2 seconds and no larger than 15 MB; combined duration must not exceed 30.2 seconds. At least one reference image or video is required. |
| `resolution` | enum | いいえ | `"720p"` | 480p, 720p, 1080p | Video resolution - 480p for faster generation, 720p for balance, 1080p for high quality. |
| `seed` | object | いいえ | `-` | - | Random seed for reproducibility. Note that results may still vary slightly even with the same seed. |
| `end_user_id` | object | いいえ | `-` | - | The unique user ID of the end user. |
| `image_urls` | string[] | いいえ | `["https://v3b.fal.media/files/b/0a8eba37/Cqg-4Uwzyz4DELfceT1CF_a17e588773ec45b1a9e6f100a787b80b.jpg"]` | - | Reference images to guide video generation. Refer to them in the prompt as @Image1, @Image2, etc. Supported formats: JPG, PNG, WebP, BMP, TIFF, GIF, HEIC, HEIF. Max 30 MB per image. Up to 30 images. Total files across all modalities must not exceed 50. |
| `aspect_ratio` | enum | いいえ | `"auto"` | auto, 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | The aspect ratio of the generated video. Use 16:9 for landscape, 9:16 for portrait/vertical, 1:1 for square, 21:9 for ultrawide cinematic, or auto to let the model decide. |

#### input フィールド

_このモデルのフィールド設定はありません。_

### Seedance 2.5

#### Payload フィールド

| フィールド | タイプ | 必須 | デフォルト / 例 | 選択肢 | 説明 |
| --- | --- | --- | --- | --- | --- |
| `model` | enum | はい | `"bytedance/seedance-2-5"` | bytedance/seedance-2-5 | The model name to use for generation. Required field. - Must be `bytedance/seedance-2-5` for this endpoint |
| `input` | object | はい | `-` | - | Input parameters for the generation task |

#### input フィールド

| フィールド | タイプ | 必須 | デフォルト / 例 | 選択肢 | 説明 |
| --- | --- | --- | --- | --- | --- |
| `prompt` | string | いいえ | `"A serene beach at sunset with waves gently crashing on the shore, palm trees swaying in the breeze, and seagulls flying across the orange sky"` | - | The text prompt used to generate the video.. ( Max length: 30000 characters) |
| `first_frame_url` | string | いいえ | `-` | - | First frame image url or asset://{assetId} (for example: asset://asset-20260404242101-76djj)<br>Cannot be used simultaneously with reference_image_urls, reference_video_urls, or reference_audio_urls. |
| `last_frame_url` | string | いいえ | `-` | - | End frame image url or asset://{assetId} (for example: asset://asset-20260404242101-76djj)<br>last_frame_url cannot be passed alone; first_frame_url must be provided together with it. |
| `reference_image_urls` | string[] | いいえ | `["https://file.aiquickdraw.com/custom-page/akr/section-images/example1.png"]` | - | Enter a list of image URLs or asset://{assetId} (for example: asset://asset-20260404242101-76djj).<br>Single image requirements:<br>Format: jpeg, png, webp, bmp, tiff, gif.<br>Aspect ratio (width/height): (0.4, 2.5)<br>Width and height (px): (300, 6000)<br>Size: Single image less than 30 MB.<br>Maximum number of files: The sum of the number of frames at the beginning and end must not exceed 30.<br>Mutually exclusive with the first/last-frame scenario; |
| `reference_video_urls` | string[] | いいえ | `-` | - | Enter a list of video URLs or asset://{assetId} (for example: asset://asset-20260404242101-76djj) .<br>Single video requirements:<br>Video format: mp4, mov.<br>Resolution: 480p, 720p<br>Dimensions:<br>Aspect ratio (width/height): [0.4, 2.5]<br>Width/height (px): [300, 6000]<br>Total pixels: [640×640=409600, 834×1112=927408], i.e., the product of width and height must meet the range requirement of [409600, 927408].<br>Size: Single video not exceeding 200 MB.<br>Frame rate (FPS): [24, 60]<br>Single video duration: [2, 30] seconds; Mutually exclusive with the first/last-frame scenario; Total duration of reference videos must not exceed 30 seconds. |
| `reference_audio_urls` | string[] | いいえ | `-` | - | Enter a list of audio URLs or asset://{assetId} (for example: asset://asset-20260404242101-76djj) .<br>Single audio requirements:<br>Format: wav, mp3<br>Size: Single audio file size not exceeding 15 MB.<br>Single audio duration: [2, 30] seconds; Mutually exclusive with the first/last-frame scenario; Total duration of reference videos must not exceed 30 seconds. |
| `return_last_frame` | boolean | いいえ | `false` | - | Whether to return the last frame of the video. When draft=true, this parameter cannot be set to true. |
| `generate_audio` | boolean | いいえ | `true` | - | Whether to generate audio for the video. - **true**: Generate with audio (higher cost)<br>- **false**: Generate without audio Note: Enabling audio will increase the generation cost |
| `resolution` | enum | いいえ | `"720p"` | 480p, 720p, 1080p | Video resolution - 480p for faster generation, 720p for balance. |
| `aspect_ratio` | enum | いいえ | `"adaptive"` | 1:1, 4:3, 3:4, 16:9, 9:16, 21:9, adaptive | Video aspect ratio configuration. |
| `duration` | number | いいえ | `5` | - | Video duration in seconds, from 4 to 30. |
| `output_format` | enum | いいえ | `"mp4"` | mp4, mov | Video output format. |
| `web_search` | boolean | いいえ | `-` | - | Enable online search. |
| `nsfw_checker` | boolean | いいえ | `-` | - | Defaults to false. You can set it to false based on your needs. If set to false, our content filtering will be disabled, and all results will be returned directly by the model itself.<br>Note: There is no guarantee that everything can be filtered out; if you are not satisfied with the results, you will need to make your own arrangements. |

## 価格

生成タスクの作成時にクレジットが予約されます。作成レスポンスの `reservedCredits` が、そのリクエストで予約されたクレジット数です。

| モデル | タイプ | 仕様 | 価格 | 課金 |
| --- | --- | --- | --- | --- |
| Text to Video | テキストから動画 | 480p | 44.1 クレジット/秒 | 出力秒数 × 44.1 |
| Text to Video | テキストから動画 | 720p | 94.6 クレジット/秒 | 出力秒数 × 94.6 |
| Text to Video | テキストから動画 | 1080p | 232.8 クレジット/秒 | 出力秒数 × 232.8 |
| Image to Video | 画像から動画 | 480p | 44.1 クレジット/秒 | 出力秒数 × 44.1 |
| Image to Video | 画像から動画 | 720p | 94.6 クレジット/秒 | 出力秒数 × 94.6 |
| Image to Video | 画像から動画 | 1080p | 232.8 クレジット/秒 | 出力秒数 × 232.8 |
| Reference to Video | テキスト/画像から動画 | 480p | 44.1 クレジット/秒 | 出力秒数 × 44.1 |
| Reference to Video | 動画から動画 | 480p | 26.5 クレジット/秒 | （入力秒数 + 出力秒数）× 26.5 |
| Reference to Video | テキスト/画像から動画 | 720p | 94.6 クレジット/秒 | 出力秒数 × 94.6 |
| Reference to Video | 動画から動画 | 720p | 56.8 クレジット/秒 | （入力秒数 + 出力秒数）× 56.8 |
| Reference to Video | テキスト/画像から動画 | 1080p | 232.8 クレジット/秒 | 出力秒数 × 232.8 |
| Reference to Video | 動画から動画 | 1080p | 139.7 クレジット/秒 | （入力秒数 + 出力秒数）× 139.7 |
| Seedance 2.5 | 動画から動画 | 480p | 17 クレジット/秒 | （入力秒数 + 出力秒数）× 17 |
| Seedance 2.5 | テキスト/画像から動画 | 480p | 28 クレジット/秒 | 出力秒数 × 28 |
| Seedance 2.5 | 動画から動画 | 720p | 38 クレジット/秒 | （入力秒数 + 出力秒数）× 38 |
| Seedance 2.5 | テキスト/画像から動画 | 720p | 63 クレジット/秒 | 出力秒数 × 63 |
| Seedance 2.5 | 動画から動画 | 1080p | 68.5 クレジット/秒 | （入力秒数 + 出力秒数）× 68.5 |
| Seedance 2.5 | テキスト/画像から動画 | 1080p | 114 クレジット/秒 | 出力秒数 × 114 |

## 一般的なエラー

| ステータス | 意味 |
| --- | --- |
| `400` | Invalid request payload |
| `401` | Missing or invalid API key |
| `402` | Insufficient credits or plan limit |
| `404` | Model or task not found |
| `429` | Rate limit exceeded |
| `500` | Server error |