> ## Documentation Index > Fetch the complete documentation index at: https://www.krea.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Starlight > A diffusion-based AI upscaler from Topaz that transforms low-resolution and degraded video into HD quality. Max 4K. ## OpenAPI ````yaml https://api.krea.ai/openapi.json post /generate/enhance/topaz/starlight-precise openapi: 3.1.0 info: title: Krea API version: v1 servers: - url: https://api.krea.ai description: Krea API security: - bearerAuth: [] tags: - name: General description: Core API operations including job management and billing information - name: Krea description: Krea-owned generation models including Krea 2 - name: Assets description: >- Asset management endpoints for uploading and managing images, videos, audio files, and 3D models - name: Styles description: Style (LoRA) generation and management endpoints - name: Node Apps description: Executing custom node apps built in our nodes tool - name: Image description: Image generation endpoints - name: Image Enhance description: Image enhance endpoints - name: Video description: Video generation endpoints - name: Video Enhance description: Video enhance and upscale endpoints - name: 3D description: 3D model generation and export endpoints paths: /generate/enhance/topaz/starlight-precise: post: tags: - Video Enhance summary: Starlight description: >- A diffusion-based AI upscaler from Topaz that transforms low-resolution and degraded video into HD quality. Max 4K. parameters: - name: X-Webhook-URL in: header required: false schema: type: string format: uri description: >- URL to receive a POST request when the job completes. The webhook will receive the job data including results. requestBody: content: application/json: example: {} schema: type: object properties: target_width: description: Output width in pixels. Defaults to the source video width. type: number minimum: 1 maximum: 8000 target_height: description: >- Output height in pixels. Defaults to the source video height. type: number minimum: 1 maximum: 8000 crop_to_fit: default: false description: >- Crop the video to fill the target dimensions instead of preserving the source aspect ratio. type: boolean video_url: type: string maxLength: 1024 format: uri description: >- Can be an external URL, base64 data URI, or uploaded asset URL. frame_interpolation: default: false description: Interpolate extra frames to raise the output frame rate. type: boolean frame_interpolation_fps: default: 60 description: Target output frame rate (frame interpolation only). x-krea-visible-when: - field: frame_interpolation equals: true type: integer minimum: 15 maximum: 240 frame_interpolation_model: default: apo-8 description: Frame interpolation model. x-krea-enum-labels: - Apollo - Apollo Fast - Chronos - Chronos Fast x-krea-visible-when: - field: frame_interpolation equals: true type: string enum: - apo-8 - apf-2 - chr-2 - chf-3 frame_interpolation_slowmo: default: 1 description: >- Slow-motion factor, 1 keeps the original speed (frame interpolation only). x-krea-visible-when: - field: frame_interpolation equals: true type: integer minimum: 1 maximum: 16 frame_interpolation_fix_duplicate_frames: default: true description: Detect and drop duplicate frames before interpolating. x-krea-visible-when: - field: frame_interpolation equals: true type: boolean frame_interpolation_duplicate_sensitivity: default: 0.01 description: >- Sensitivity of duplicate-frame detection (only when fix duplicate frames is on). x-krea-visible-when: - field: frame_interpolation equals: true - field: frame_interpolation_fix_duplicate_frames equals: true type: number minimum: 0.001 maximum: 0.1 video_output_preset: default: h265-main description: 'Output encoder profile: codec, container, and bit depth.' x-krea-enum-labels: - H.264 High (8-bit) - H.265 Main (8-bit) - H.265 Main10 (10-bit) - ProRes 422 Proxy (10-bit) - ProRes 422 LT (10-bit) - ProRes 422 Std (10-bit) - ProRes 422 HQ (10-bit) - AV1 (8-bit) - AV1 (10-bit) - VP9 Good (8-bit) - VP9 Best (8-bit) type: string enum: - h264-high - h265-main - h265-main10 - prores-422-proxy - prores-422-lt - prores-422-std - prores-422-hq - av1-8-bit - av1-10-bit - vp9-good - vp9-best required: - video_url additionalProperties: false responses: '200': description: >- The resulting job data. This will be returned in a pending state until the job is completed. See [`/jobs/{id}`](#tag/default/get/jobs/{id}) for retrieving the results. content: application/json: schema: type: object properties: job_id: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ status: type: string enum: - backlogged - queued - scheduled - processing - sampling - intermediate-complete - completed - failed - cancelled created_at: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ completed_at: type: 'null' result: type: 'null' error: type: object properties: code: type: string message: type: string required: - code additionalProperties: false required: - job_id - status - created_at - completed_at - result additionalProperties: false '400': description: The request body is invalid. content: application/json: schema: type: object properties: error: type: string required: - error additionalProperties: false '401': description: You are not authenticated. content: application/json: schema: type: object properties: error: type: string required: - error additionalProperties: false '402': description: You have run out of credits. content: application/json: schema: type: object properties: error: type: string required: - error additionalProperties: false '429': description: You have reached the maximum number of concurrent jobs. content: application/json: schema: type: object properties: error: type: string required: - error additionalProperties: false components: securitySchemes: bearerAuth: scheme: bearer bearerFormat: Bearer type: http ````