> ## Documentation Index > Fetch the complete documentation index at: https://docs.powertokens.ai/llms.txt > Use this file to discover all available pages before exploring further. # Wan 2.7 Video Continuation > Submit an asynchronous Ali `wan2.7-i2v` video continuation task. Use `first_clip` to specify the initial video segment, optionally paired with `last_frame` for an end frame reference. Supported `media` combinations: - `first_clip` - `first_clip + last_frame` The `prompt` field is optional for this capability. `size` only supports `720P` and `1080P`. `seconds` only supports integer strings from `2` to `15`. Also supports official fields `negative_prompt`, `prompt_extend`, `watermark`, and `seed`. ## OpenAPI ````yaml api-reference/en/zmodelVideo/ali/wan2.7-i2v-video-continuation.json POST /v1/videos openapi: 3.0.1 info: title: Wan 2.7 Video Continuation version: 1.0.0 description: >- Ali `wan2.7-i2v` video continuation capability documentation. The unified API endpoint is `/v1/videos`. This document covers the video continuation scenario and uses the top-level `media` array to express the upstream provider's new `input.media` protocol. Supported `media.type` values for this scenario are `first_clip` and `last_frame`. Supported `media` combinations: - `first_clip` - `first_clip + last_frame` The `prompt` field is optional for this capability. `size` only supports `720P` and `1080P`. `seconds` only supports integer strings from `2` to `15`. Also supports official fields `negative_prompt`, `prompt_extend`, `watermark`, and `seed`. license: name: Project License url: https://github.com/QuantumNous/new-api/blob/main/LICENSE servers: - url: https://api.powertokens.ai description: Baze API server endpoint security: [] tags: - name: Wan 2.7 Video description: Ali wan2.7-i2v video continuation capability paths: /v1/videos: post: tags: - Wan 2.7 Video summary: Create Wan 2.7 Video Continuation task description: >- Submit an asynchronous Ali `wan2.7-i2v` video continuation task. Use `first_clip` to specify the initial video segment, optionally paired with `last_frame` for an end frame reference. Supported `media` combinations: - `first_clip` - `first_clip + last_frame` The `prompt` field is optional for this capability. `size` only supports `720P` and `1080P`. `seconds` only supports integer strings from `2` to `15`. Also supports official fields `negative_prompt`, `prompt_extend`, `watermark`, and `seed`. operationId: aliWan27I2VVideoContinuation requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/Wan27VideoContinuationRequest' examples: first_clip_only: summary: First clip only value: model: wan2.7-i2v prompt: >- The character continues walking naturally forward, maintaining the same style as the input clip. media: - type: first_clip url: https://example.com/assets/input.mp4 seconds: '5' size: 1080P first_clip_with_last_frame: summary: First clip + last frame value: model: wan2.7-i2v prompt: >- The character transitions naturally from walking to a standing pose. media: - type: first_clip url: https://example.com/assets/input.mp4 - type: last_frame url: https://example.com/assets/end-pose.png seconds: '5' size: 1080P responses: '200': description: >- Submitted successfully. Returns an OpenAI-compatible video task object. content: application/json: schema: $ref: '#/components/schemas/VideoTaskResponse' '400': description: >- Invalid request parameters, e.g. unsupported `media` combination, or `size` / `seconds` out of supported range. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: invalid_request: summary: Invalid request value: error: message: unsupported wan2.7-i2v media combination type: invalid_request_error code: invalid_request '401': description: Authentication failed. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '429': description: Rate limit triggered or insufficient account quota. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: An internal error occurred while processing the request. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - BearerAuth: [] components: schemas: Wan27VideoContinuationRequest: type: object required: - model - media properties: model: type: string enum: - wan2.7-i2v description: 'Model name. Available value: `wan2.7-i2v`.' prompt: type: string description: >- Text prompt describing the desired video content and visual characteristics. Supports Chinese and English, up to 5000 characters (each character or letter counts as one). Excess characters will be automatically truncated. size: type: string enum: - 720P - 1080P description: >- Specifies the output resolution tier for controlling video clarity (total pixels). The model automatically scales to a similar total pixel count based on the selected resolution tier. The video aspect ratio will attempt to stay consistent with the input material (first frame or first clip). default: 1080P seconds: type: string description: >- Video duration as a string. Supports integer strings from `2` to `15`. default: '5' enum: - '2' - '3' - '4' - '5' - '6' - '7' - '8' - '9' - '10' - '11' - '12' - '13' - '14' - '15' negative_prompt: type: string description: >- Negative prompt describing content you do not want in the video. Supports Chinese and English, up to 500 characters. Excess characters will be automatically truncated. Example: `low resolution, worst quality, deformed, extra fingers, bad proportions`. prompt_extend: type: boolean description: >- Whether to enable intelligent prompt rewriting. When enabled, a large language model rewrites the input prompt intelligently, significantly improving results for short prompts but increasing processing time. `true` (default): enable. `false`: disable. watermark: type: boolean description: >- Whether to add a watermark. The watermark is positioned at the bottom-right corner with the text 'AI生成'. `false` (default): no watermark. `true`: add watermark. default: false seed: type: integer minimum: 0 maximum: 2147483647 description: >- Random seed, range [0, 2147483647]. When unspecified, the system auto-generates a random seed. For better reproducibility, set a fixed seed. Note: due to the probabilistic nature of model generation, the same seed does not guarantee identical results every time. media: type: array description: >- List of media assets (images, audio, video) for video generation. Each element is a media object with `type` and `url`. Supported combinations (invalid combinations will return an error): - **First clip only**: `first_clip` - **First clip + last frame**: `first_clip` + `last_frame` Each `type` can appear at most once in the array. items: $ref: '#/components/schemas/Wan27MediaInput' VideoTaskResponse: type: object properties: id: type: string description: Public task ID. task_id: type: string description: Backward-compatible alias for the public task ID. object: type: string example: video model: type: string description: Model name. status: type: string enum: - queued - in_progress - completed - failed - unknown description: Unified video task status. progress: type: integer description: Task progress percentage. created_at: type: integer format: int64 description: Creation time as a Unix timestamp (seconds). ErrorResponse: type: object properties: error: type: object properties: message: type: string type: type: string code: type: string Wan27MediaInput: type: object required: - type - url properties: type: type: string enum: - first_clip - last_frame description: >- Media asset type. - `first_clip`: First video clip. - `last_frame`: Last frame image. Each type can appear at most once per request (e.g. cannot include two `first_clip` entries). url: type: string description: >- Media asset URL. Supports images, audio, and video. **Video** (type=`first_clip`) Video file URL. The model generates continuation content based on this video. The upper limit of the continuation duration is controlled by the `duration` parameter. For example: when `duration=15` and the input video is 3 seconds, the model generates 12 seconds of continuation, the final output video has a total duration of 15 seconds, and is billed for 15 seconds. Video restrictions: - Formats: MP4, MOV. - Duration: 2~10s. - Resolution: width and height range [240, 4096] pixels. - Aspect ratio: 1:8 ~ 8:1. - File size: up to 100MB. Supported input formats: Public URL: Supports HTTP and HTTPS protocols. Example: `https://xxx/xxx.mp4`. Temporary URL: Supports OSS protocol. Must obtain the temporary URL via file upload. Example: `oss://dashscope-instant/xxx/xxx.mp4`. **Image** (type=`last_frame`): Last frame URL, or Base64 encoded data. Image restrictions: - Formats: JPEG, JPG, PNG (no alpha channel), BMP, WEBP. - Resolution: width and height range [240, 8000] pixels. - Aspect ratio: 1:8 ~ 8:1. - File size: up to 20MB. Supported input formats: Public URL: Supports HTTP or HTTPS protocols. Example: `https://xxx/xxx.png`. Temporary URL: Supports OSS protocol. Must obtain the temporary URL via file upload. Example: `oss://dashscope-instant/xxx/xxx.png`. Base64 encoded image string: Data format: data:{MIME_type};base64,{base64_data}. Example: data:image/png;base64,GDU7MtCZzEbTbmRZ...... (truncated for demonstration). Base64 encoded data format Format: data:{MIME_type};base64,{base64_data}. {base64_data}: The Base64 encoded string of the image file. {MIME_type}: The media type of the image, corresponding to the file format. Image format to MIME Type mapping: | Image Format | MIME Type | | --- | --- | | JPEG | image/jpeg | | JPG | image/jpeg | | PNG | image/png | | BMP | image/bmp | | WEBP | image/webp | securitySchemes: BearerAuth: type: http scheme: bearer bearerFormat: API Key description: 'Pass `Authorization: Bearer ` in the request header.' ````