> ## Documentation Index > Fetch the complete documentation index at: https://docs.aihubmax.com/llms.txt > Use this file to discover all available pages before exploring further. # Grok Imagine 视频延长 > - Grok Imagine 视频延长模型，基于已有视频生成延续片段 - 输入视频需为 2-15 秒 MP4，延长片段时长支持 2-10 秒 - 异步处理模式，使用返回的任务ID [进行查询](/pages/zh/api-manual/task-management/get-task-detail) - 生成的视频链接，有效期为24小时，请尽快保存 ## OpenAPI ````yaml openapi/zh/grok-imagine-video-extension.json POST /v1/videos/generations openapi: 3.1.0 info: title: Grok Imagine Video Extension version: '1.0' servers: - url: https://api.aihubmax.com security: - BearerAuth: [] paths: /v1/videos/generations: post: tags: - Video > Grok summary: Grok Imagine Video Extension description: > - Grok Imagine 视频延长模型，基于已有视频生成延续片段 - 输入视频需为 2-15 秒 MP4，延长片段时长支持 2-10 秒 - 异步处理模式，使用返回的任务ID [进行查询](/pages/zh/api-manual/task-management/get-task-detail) - 生成的视频链接，有效期为24小时，请尽快保存 operationId: grok-imagine-video-extension requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/GrokImagineVideoExtensionRequest' examples: extend_a_video: summary: Extend a video value: model: grok-imagine-video-extension prompt: >- The camera slowly zooms out to reveal the city skyline at sunset video_url: https://example.com/input-video.mp4 duration: 6 responses: '200': $ref: '#/components/responses/TaskCreated' '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '402': $ref: '#/components/responses/PaymentRequired' '422': $ref: '#/components/responses/UnprocessableEntity' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' '503': $ref: '#/components/responses/ServiceUnavailable' components: schemas: GrokImagineVideoExtensionRequest: type: object required: - model - prompt - video_url properties: model: description: '`grok-imagine-video-extension`：基于已有视频延长生成续段' examples: - grok-imagine-video-extension type: string default: grok-imagine-video-extension prompt: description: | 文本提示词，描述视频接下来应继续发生的内容 **说明：** - 支持中英文 - 建议描述镜头延续、动作走向或场景变化 - 最多 `4096` 个字符 maxLength: 4096 type: string example: The camera slowly zooms out to reveal the city skyline at sunset video_url: description: | 输入视频的公开 URL **说明：** - 必须为公开可访问的 MP4 URL - 编码支持 `H.264` / `H.265` / `AV1` - 输入视频时长需在 `2` - `15` 秒之间 type: string example: https://example.com/input-video.mp4 duration: anyOf: - type: integer - type: 'null' default: null description: | 延长片段时长（秒） **说明：** - 范围：`2` - `10` - 未传时默认 `6` 秒 example: 2 TaskResponse: type: object properties: created: type: integer description: 任务创建时间戳 example: 1757165031 id: type: string description: 任务ID example: task-unified-1757165031-uyujaw3d model: type: string description: 实际使用的模型名称 object: type: string description: 任务的具体类型 enum: - video.generation.task progress: type: integer description: 任务进度百分比 (0-100) minimum: 0 maximum: 100 example: 0 status: type: string description: 任务状态 enum: - pending - processing - completed - failed example: pending task_info: type: object description: 异步任务信息 properties: can_cancel: type: boolean description: 任务是否可以取消 example: true estimated_time: type: integer description: 预计完成时间（秒） example: 45 type: type: string description: 任务的输出类型 enum: - video example: video ErrorResponse400: type: object properties: error: type: object properties: message: type: string example: 请求格式错误 type: type: string example: invalid_request_error ErrorResponse401: type: object properties: error: type: object properties: message: type: string example: API密钥无效 type: type: string example: authentication_error ErrorResponse402: type: object properties: error: type: object properties: message: type: string example: 账户余额不足 type: type: string example: insufficient_quota ErrorResponse422: type: object properties: error: type: object properties: message: type: string example: 参数校验失败 type: type: string example: validation_error ErrorResponse429: type: object properties: error: type: object properties: message: type: string example: 请求频率超限 type: type: string example: rate_limit_error ErrorResponse500: type: object properties: error: type: object properties: message: type: string example: 服务器内部错误 type: type: string example: server_error ErrorResponse503: type: object properties: error: type: object properties: message: type: string example: 服务暂不可用，请稍后重试 type: type: string example: service_unavailable responses: TaskCreated: description: 任务创建成功 content: application/json: schema: $ref: '#/components/schemas/TaskResponse' BadRequest: description: 请求格式错误 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse400' Unauthorized: description: 未授权 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse401' PaymentRequired: description: 余额不足 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse402' UnprocessableEntity: description: 参数校验失败 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse422' TooManyRequests: description: 请求频率超限 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse429' InternalServerError: description: 服务器内部错误 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse500' ServiceUnavailable: description: 服务暂不可用 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse503' securitySchemes: BearerAuth: type: http scheme: bearer description: | ## 所有接口均需要使用Bearer Token进行认证 ## 使用时在请求头中添加： `Authorization: Bearer YOUR_API_KEY` ````