> ## Documentation Index > Fetch the complete documentation index at: https://docs.modellix.ai/llms.txt > Use this file to discover all available pages before exploring further. # Vidu Q3 R2V > [Core Function] Vidu Q3 R2V is a high-quality reference-to-video generation model. [Strengths] It excels at generating detailed, cinematic videos that precisely follow a text prompt while highly preserving the character identity from provided reference images. [Best For] Highly recommended for: professional character-driven storytelling, high-fidelity avatar generation in new scenes, and cinematic films requiring consistent actors. [Limitations] Do NOT use this model if you just want to add motion to an existing image (use I2V). This model creates new scenes based on the prompt while keeping the character. [Routing] Use this by default when the user wants to generate a video of a specific character (provided via image) doing something new (provided via text prompt). ## OpenAPI ````yaml /model-api/vidu/vidu-i2v.json post /vidu/viduq3-r2v openapi: 3.1.0 info: description: >- The image-to-video models API from Vidu. Includes standard I2V, first-last frame, reference-to-video, digital human, multi-frame animation, template story, and one-click film/ad generation. version: 1.0.0 contact: name: Modellix Support email: support@modellix.ai title: Vidu Image-to-Video Models API servers: - url: https://api.modellix.ai/api/v1 description: The image-to-video models API from Vidu. security: - bearerAuth: [] paths: /vidu/viduq3-r2v: post: summary: Vidu Q3 R2V description: >- [Core Function] Vidu Q3 R2V is a high-quality reference-to-video generation model. [Strengths] It excels at generating detailed, cinematic videos that precisely follow a text prompt while highly preserving the character identity from provided reference images. [Best For] Highly recommended for: professional character-driven storytelling, high-fidelity avatar generation in new scenes, and cinematic films requiring consistent actors. [Limitations] Do NOT use this model if you just want to add motion to an existing image (use I2V). This model creates new scenes based on the prompt while keeping the character. [Routing] Use this by default when the user wants to generate a video of a specific character (provided via image) doing something new (provided via text prompt). operationId: viduQ3R2VAsync requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ViduQ3R2VRequest' examples: basic: summary: Single reference image value: prompt: >- A musician performs on an outdoor stage, crowd cheering with raised hands reference_images: - https://example.com/musician.jpg with_multiple_refs: summary: Multiple reference images value: prompt: >- A family enjoys a picnic in a sunny park, children playing on the grass reference_images: - https://example.com/parent1.jpg - https://example.com/parent2.jpg - https://example.com/child.jpg duration: 10 full_options: summary: Full options value: prompt: >- An explorer discovers a hidden waterfall deep in a jungle, vines draping over ancient stones reference_images: - https://example.com/explorer.jpg duration: 8 aspect_ratio: '16:9' resolution: 720p seed: 3333 responses: '200': description: Task submitted successfully content: application/json: schema: $ref: '#/components/schemas/AsyncTaskResponse' example: code: 0 message: success data: status: pending task_id: task-vidu-r2v-003 model_id: vidu/viduq3-r2v get_result: method: GET url: https://api.modellix.ai/api/v1/tasks/task-vidu-r2v-003 '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '429': $ref: '#/components/responses/TooManyRequests' '500': $ref: '#/components/responses/InternalServerError' components: schemas: ViduQ3R2VRequest: type: object required: - prompt - reference_images description: Vidu Q3 Turbo and standard R2V request. Duration minimum 3s. properties: prompt: type: string minLength: 1 maxLength: 5000 description: Video description text example: A superhero leaps from a rooftop, cape billowing dramatically reference_images: type: array minItems: 1 maxItems: 7 description: >- Portrait or subject images (1-7) whose appearance will be preserved in the generated video. Accepts URLs or base64 data URIs. items: type: string minLength: 1 example: - https://example.com/hero.jpg duration: type: integer minimum: 3 maximum: 16 default: 5 description: Video duration in seconds (minimum 3) example: 6 aspect_ratio: type: string enum: - '16:9' - '9:16' - '1:1' default: '16:9' description: Video aspect ratio example: '16:9' resolution: type: string enum: - 540p - 720p - 1080p default: 720p description: Video resolution example: 1080p seed: type: integer description: Random seed for reproducibility example: 2222 AsyncTaskResponse: type: object required: - code - message - data properties: code: type: integer description: Response code, 0 indicates success example: 0 message: type: string description: Response message example: success data: type: object required: - status - task_id - model_id properties: status: type: string enum: - pending - processing description: Task status example: pending task_id: type: string description: Unique task identifier for polling example: task-abc123 model_id: type: string description: Model ID in `provider/model` format example: vidu/viduq3-pro-fast-i2v get_result: type: object description: API information to query the task result properties: method: type: string example: GET url: type: string example: https://api.modellix.ai/api/v1/tasks/task-abc123 description: Detailed data about the submitted asynchronous task. ErrorResponse: type: object required: - code - message properties: code: type: integer example: 400 message: type: string example: 'Invalid parameters: parameter ''first_frame_image'' is required' responses: BadRequest: description: Invalid request parameters content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 400 message: 'Invalid parameters: parameter ''first_frame_image'' is required' Unauthorized: description: Unauthorized - Invalid or missing API Key content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 401 message: 'Authentication failed: invalid API key' TooManyRequests: description: Too many requests - Rate limit exceeded headers: X-RateLimit-Limit: description: Maximum requests per minute schema: type: integer example: 100 X-RateLimit-Remaining: description: Remaining quota in current window schema: type: integer example: 0 X-RateLimit-Reset: description: Rate limit window reset time (Unix timestamp) schema: type: integer example: 1704067260 content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 429 message: >- Rate limit exceeded: 100 requests per minute, retry after 60 seconds InternalServerError: description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: code: 500 message: Internal server error securitySchemes: bearerAuth: type: http scheme: bearer description: 'API Key authentication. Format: `Bearer YOUR_API_KEY`.' ````