> ## Documentation Index > Fetch the complete documentation index at: https://evolink.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Seedance 2.5 Image-to-Video > - Input 1 image for first-frame video generation, input 2 images for first-last-frame video generation, the model determines automatically - **Now supports AIGC realistic human materials** - Supports **draft mode**: set `draft: true` to generate a 480p draft first. If you are satisfied, use [Draft-to-Video](/en/api-manual/video-series/seedance/seedance-2.5/seedance-2.5-draft-to-video) to convert it into a 1080p final video. The two requests are billed separately - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly ## OpenAPI ````yaml en/api-manual/video-series/seedance/seedance-2.5/seedance-2.5-image-to-video.json POST /v1/videos/generations openapi: 3.1.0 info: title: Seedance 2.5 Image-to-Video API description: >- Seedance 2.5 image-to-video API, supports first-frame and first-last-frame image-to-video generation license: name: MIT version: 1.0.0 servers: - url: https://api.evolink.ai description: Production security: - bearerAuth: [] tags: - name: Video Generation description: AI video generation endpoints paths: /v1/videos/generations: post: tags: - Video Generation summary: Seedance 2.5 Image-to-Video description: >- - Input 1 image for first-frame video generation, input 2 images for first-last-frame video generation, the model determines automatically - **Now supports AIGC realistic human materials** - Supports **draft mode**: set `draft: true` to generate a 480p draft first. If you are satisfied, use [Draft-to-Video](/en/api-manual/video-series/seedance/seedance-2.5/seedance-2.5-draft-to-video) to convert it into a 1080p final video. The two requests are billed separately - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Generated video links are valid for 24 hours, please save them promptly operationId: createSeedance25ImageToVideo requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/VideoGenerationRequest' examples: first_frame: summary: First-frame image-to-video value: model: seedance-2.5-image-to-video prompt: >- The camera slowly zooms in, the scene gradually comes to life image_urls: - https://example.com/first-frame.jpg duration: 5 quality: 720p aspect_ratio: adaptive first_last_frame: summary: First-last-frame image-to-video value: model: seedance-2.5-image-to-video prompt: A smooth transition between two scenes image_urls: - https://example.com/first.jpg - https://example.com/last.jpg duration: 6 quality: 720p aspect_ratio: adaptive draft: summary: Draft mode (480p) value: model: seedance-2.5-image-to-video prompt: >- The camera slowly zooms in, the scene gradually comes to life image_urls: - https://example.com/first-frame.jpg duration: 5 quality: 480p aspect_ratio: adaptive draft: true responses: '200': description: Video generation task created successfully content: application/json: schema: $ref: '#/components/schemas/VideoGenerationResponse' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: invalid_parameter message: Invalid request parameters type: invalid_request_error '401': description: Unauthenticated, token invalid or expired content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: unauthorized message: Invalid or expired token type: authentication_error '402': description: Insufficient quota, top-up required content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: insufficient_quota message: Insufficient quota. Please top up your account. type: insufficient_quota '403': description: Access denied content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: model_access_denied message: >- Token does not have access to model: seedance-2.5-image-to-video type: invalid_request_error '429': description: Rate limit exceeded content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: rate_limit_exceeded message: Too many requests, please try again later type: rate_limit_error '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: error: code: internal_error message: Internal server error type: api_error '503': description: >- Service temporarily unavailable; draft_unavailable may be returned when draft mode is unavailable content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: draft_unavailable: summary: Draft mode temporarily unavailable value: error: code: draft_unavailable message: >- Draft mode is not available on the selected service right now. Retry later or send the request without draft. type: invalid_request_error components: schemas: VideoGenerationRequest: type: object required: - model - prompt - image_urls properties: model: type: string description: Video generation model name enum: - seedance-2.5-image-to-video default: seedance-2.5-image-to-video example: seedance-2.5-image-to-video prompt: type: string description: >- Text prompt describing the desired video. Supports both Chinese and English, recommended no more than 500 characters for Chinese or 1000 words for English. Maximum prompt length: 10000 tokens **Note:** - This model does not support `video_urls` or `audio_urls` input example: The camera slowly zooms in, the scene gradually comes to life image_urls: type: array description: >- Image URL array, **1–2 images** **Image count and behavior:** | Image Count | Behavior | Role | |:--------:|------|------| | 1 image | First-frame image-to-video | Automatically set as `first_frame` | | 2 images | First-last-frame image-to-video | 1st image → `first_frame`, 2nd image → `last_frame` | **Image requirements:** - Supported formats: `.jpeg`, `.png`, `.webp` - Aspect ratio (width/height): `0.4` ~ `2.5` - Width/height pixels: `300` ~ `6000` px - Max size per image: `30MB` - Total request body size must not exceed `64MB` - When providing first and last frames, both images can be identical. If aspect ratios differ, the first frame takes priority and the last frame will be automatically cropped to fit - Image URLs must be directly accessible by the server items: type: string format: uri minItems: 1 maxItems: 2 example: - https://example.com/first-frame.jpg duration: type: integer description: >- Video duration (seconds), defaults to `5` seconds **Details:** - Supports any integer value between `4`–`30` seconds - `-1`: automatic duration, the model picks a length within `4`–`30` seconds and billing follows the actual output length - Duration directly affects billing default: 5 example: 5 quality: type: string description: >- Video resolution, defaults to `720p` **Options:** - `480p`: Lower clarity, lower cost - `720p`: Standard clarity, this is the default - `1080p`: Ultra HD clarity **Draft mode:** When `draft` is `true`, only `480p` is supported. If omitted, `quality` automatically defaults to `480p` enum: - 480p - 720p - 1080p default: 720p example: 720p draft: type: boolean default: false description: >- Draft mode switch, defaults to `false` **Details:** - `true`: Generate a 480p draft first, with faster turnaround and standard 480p billing - When enabled, `quality` must be `480p` or omitted. Any other resolution returns a 400 parameter error - Must be a top-level request body field. Placing it inside `model_params` returns a 400 parameter error **Convert to a final video:** - Once the draft is complete, [querying the task](/en/api-manual/task-management/get-task-detail) returns `draft_expires_at` - Before that time, pass the draft task ID to [Seedance 2.5 Draft-to-Video](/en/api-manual/video-series/seedance/seedance-2.5/seedance-2.5-draft-to-video) to generate a 1080p final video with the same content - The final video and draft are billed separately. If you are not satisfied with the draft, skip conversion and pay only for the draft - The default validity period is 24 hours after the draft completes; the actual deadline is `draft_expires_at`. Submit the conversion request early: expiration while queued also causes conversion to fail **Temporary unavailability:** A 503 error may be returned when the service is temporarily unavailable. If the error code is `draft_unavailable`, retry later or remove `draft` to use normal generation mode example: false aspect_ratio: type: string description: >- Video aspect ratio, image-to-video only supports `adaptive` **Options:** - `adaptive`: Automatically selects the closest aspect ratio based on the first-frame image proportions, the only value this model accepts - Fixed ratios such as `16:9` or `9:16` cannot be specified for this model enum: - adaptive default: adaptive example: adaptive generate_audio: type: boolean description: |- Whether to generate synchronized audio, defaults to `true` **Options:** - `true`: Video includes synchronized audio at no additional charge - `false`: Output silent video default: true example: true content_filter: type: boolean description: >- Content filter, enabled by default `true` **Options:** - `true`: Standard content safety check, this is the default - `false`: Relaxes content restrictions, billed at +10% (`1.1x`). Illegal and prohibited content is always enforced regardless of this setting **Mutually exclusive with web search:** - `content_filter: false` and `model_params.web_search: true` cannot be used together; sending both returns a 400 parameter error - Keep `content_filter: true` (the default) when web search is needed default: true example: true output_format: type: string description: >- Output container format, defaults to `mp4` **Options:** - `mp4`: H.264 encoding with the best compatibility and standard color precision, this is the default - `mov`: H.264 + yuv444p chroma sampling + PCM audio for higher color fidelity, recommended for color grading, keying and compositing workflows. Browser inline playback may not support it; download and play with VLC / mpv / ffplay. No extra charge enum: - mp4 - mov default: mp4 example: mp4 callback_url: type: string description: >- HTTPS callback URL for task completion **Callback timing:** - Triggered when the task is completed or failed - Sent after billing confirmation is complete **Security restrictions:** - Only HTTPS protocol is supported - Callbacks to private IP addresses are prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.) - URL length must not exceed `2048` characters **Callback mechanism:** - Timeout: `10` seconds - Up to `3` retries after failure (at `1`/`2`/`4` seconds after failure respectively) - Callback response body format is consistent with the task query endpoint response format - A 2xx status code is considered successful; other status codes trigger retries format: uri example: https://your-domain.com/webhooks/video-task-completed VideoGenerationResponse: type: object properties: created: type: integer description: Task creation timestamp example: 1761313744 id: type: string description: Task ID example: task-unified-1774857405-abc123 model: type: string description: Actual model name used example: seedance-2.5-image-to-video object: type: string enum: - video.generation.task description: Specific type of the task progress: type: integer description: Task progress percentage (0-100) minimum: 0 maximum: 100 example: 0 status: type: string description: Task status enum: - pending - processing - completed - failed example: pending task_info: $ref: '#/components/schemas/VideoTaskInfo' description: Video task details type: type: string enum: - text - image - audio - video description: Output type of the task example: video usage: $ref: '#/components/schemas/VideoUsage' description: Usage and billing information ErrorResponse: type: object properties: error: type: object properties: code: type: string description: Error code identifier message: type: string description: Error description message type: type: string description: Error type VideoTaskInfo: type: object properties: can_cancel: type: boolean description: >- Whether the task can be cancelled. Seedance 2.5 does not support user cancellation; this field always returns `false`. example: false estimated_time: type: integer description: Estimated completion time (seconds) minimum: 0 example: 165 video_duration: type: integer description: Video duration (seconds) example: 8 VideoUsage: type: object description: Usage and billing information properties: billing_rule: type: string description: Billing rule enum: - per_call - per_token - per_second example: per_second credits_reserved: type: number description: Estimated credits consumed minimum: 0 example: 50 user_group: type: string description: User group category example: default securitySchemes: bearerAuth: type: http scheme: bearer description: >- ##All endpoints require Bearer Token authentication## **Get API Key:** Visit the [API Key Management Page](https://evolink.ai/dashboard/keys) to obtain your API Key **Add to request header:** ``` Authorization: Bearer YOUR_API_KEY ``` ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.