> ## Documentation Index > Fetch the complete documentation index at: https://docs.evolink.ai/llms.txt > Use this file to discover all available pages before exploring further. # Topaz Video Upscale > - Topaz Video Upscale (topaz-video-upscale) model supports AI-powered video super-resolution upscaling - Supports 1x (enhancement only), 2x, and 4x upscale factors - Billing is based on input video duration (per second) and upscale factor - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Upscaled video links are valid for 24 hours, please save them promptly ## OpenAPI ````yaml /en/api-manual/video-series/topaz/topaz-video-upscale.json POST /v1/videos/generations openapi: 3.1.0 info: title: topaz-video-upscale API description: AI-powered video super-resolution upscaling using Topaz model 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 APIs paths: /v1/videos/generations: post: tags: - Video Generation summary: topaz-video-upscale API description: >- - Topaz Video Upscale (topaz-video-upscale) model supports AI-powered video super-resolution upscaling - Supports 1x (enhancement only), 2x, and 4x upscale factors - Billing is based on input video duration (per second) and upscale factor - Asynchronous processing mode, use the returned task ID to [query status](/en/api-manual/task-management/get-task-detail) - Upscaled video links are valid for 24 hours, please save them promptly operationId: createVideoGeneration requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/VideoGenerationRequest' examples: basic_2x_upscale: summary: Basic 2x Upscale (default) value: model: topaz-video-upscale video_urls: - https://example.com/my-video.mp4 upscale_4x: summary: 4x Upscale (higher quality, 1.75x price) value: model: topaz-video-upscale video_urls: - https://example.com/my-video.mp4 model_params: upscale_factor: '4' upscale_1x_enhance: summary: 1x Enhancement (no resolution change, quality boost only) value: model: topaz-video-upscale video_urls: - https://example.com/my-video.mp4 model_params: upscale_factor: '1' with_callback: summary: With Callback URL value: model: topaz-video-upscale video_urls: - https://example.com/my-video.mp4 model_params: upscale_factor: '2' callback_url: https://your-domain.com/webhooks/video-task-completed responses: '200': description: Video upscale task created successfully content: application/json: schema: $ref: '#/components/schemas/VideoGenerationResponse' '400': description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' examples: missing_video: summary: Missing video URL value: error: code: invalid_parameter message: >- video_urls is required and must not be empty for topaz-video-upscale type: invalid_request_error probe_failed: summary: Video probe failed value: error: code: video_probe_failed message: >- Failed to detect video duration, please check video URL accessibility type: invalid_request_error '401': description: Unauthenticated, token is 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: topaz-video-upscale' 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 components: schemas: VideoGenerationRequest: type: object required: - model - video_urls properties: model: type: string description: Video upscale model name enum: - topaz-video-upscale default: topaz-video-upscale example: topaz-video-upscale video_urls: type: array description: >- Input video URL list for upscaling **Note:** - Only `1` video per request - Video URL must be directly accessible by the server (public URL or pre-signed URL) - The server will automatically detect the input video duration for billing - Supported formats: `.mp4` items: type: string format: uri minItems: 1 maxItems: 1 example: - https://example.com/my-video.mp4 model_params: type: object description: Model-specific parameters for controlling upscale behavior properties: upscale_factor: type: string description: >- Video upscale factor, controls the output resolution multiplier **Available options:** - `"1"` - Enhancement only (no resolution change, AI quality boost) - `"2"` - 2x upscale (e.g. 720p to 1440p) — **default** - `"4"` - 4x upscale (e.g. 720p to 2880p) **Billing impact:** - Pricing varies by upscale factor, higher factors cost more **Type handling:** - Accepts both string (`"4"`) and number (`4`) formats - Invalid values silently fall back to `"2"` (default) enum: - '1' - '2' - '4' default: '2' example: '2' callback_url: type: string description: >- HTTPS callback URL for task completion **Callback Timing:** - Triggered when task is completed, failed, or cancelled - Sent after billing confirmation **Security Restrictions:** - HTTPS protocol only - Internal 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 - Maximum `3` retries after failure (at `1`/`2`/`4` seconds after failure) - Callback response format is consistent with task query API - 2xx status code is considered successful, other codes trigger retry format: uri example: https://your-domain.com/webhooks/video-task-completed VideoGenerationResponse: type: object properties: created: type: integer description: Task creation timestamp example: 1757169743 id: type: string description: Task ID example: task-unified-1757169743-7cvnl5zw model: type: string description: Actual model name used example: topaz-video-upscale object: type: string enum: - video.generation.task description: Task type 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: Task output type 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 example: true estimated_time: type: integer description: Estimated completion time (seconds) minimum: 0 example: 600 video_duration: type: integer description: Video duration (seconds) example: 0 VideoUsage: type: object description: Usage and billing information properties: billing_rule: type: string description: >- Billing rule. For topaz-video-upscale, billing is `per_second` based on input video duration multiplied by the upscale factor pricing enum: - per_call - per_token - per_second example: per_second credits_reserved: type: number description: >- Estimated credits consumed (pre-authorized). Final billing is calculated after task completion based on actual input video duration minimum: 0 example: 28.8 user_group: type: string description: User group category example: default securitySchemes: bearerAuth: type: http scheme: bearer description: >- ## All APIs require Bearer Token authentication ## **Get API Key:** Visit [API Key Management Page](https://evolink.ai/dashboard/keys) to get your API Key **Add to request header:** ``` Authorization: Bearer YOUR_API_KEY ``` ````