> ## Documentation Index > Fetch the complete documentation index at: https://docs.goenhance.ai/llms.txt > Use this file to discover all available pages before exploring further. # Vidu Q4 Preview (Image to Video) > Vidu Q4 Preview **image-to-video** — Vidu's newest model, with a native audio track (dialogue and sound effects) and output up to 4K. `image_url` is required and is used as the first frame; the output follows its aspect ratio. This model is image-to-video only: there is no text-to-video or start-end frame mode, so requests without `image_url`, or with `image_end_url`, are rejected. For reference-image generation use [`viduq4_preview_reference`](/api-reference/video-generations/viduq4-preview-reference) — passing `image_urls` here returns an error. **Pricing** — per second of generated video, in tokens (USD at $0.02/token): | resolution | tokens/s | USD/s | |---|---|---| | 540p | 2.925 | $0.0585 | | 720p | 6.175 | $0.1235 | | 1080p | 7.8 | $0.156 | | 2K | 12.35 | $0.247 | | 4K | 25.35 | $0.507 | The price is the same for both Vidu Q4 Preview models and does not depend on `generate_audio`. Example: an 8s 720p video costs 49.4 tokens (= $0.988). Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use `custom_callback_url`) to get the generated video. ## OpenAPI ````yaml api-reference/video-generations/openapi-viduq4-preview.json POST /api/v1/videos/generations openapi: 3.1.0 info: title: GoEnhance API - Vidu Q4 Preview description: Image to video with Vidu Q4 Preview. version: 1.0.0 servers: - url: https://api.goenhance.ai security: [] paths: /api/v1/videos/generations: post: tags: - VideoGenerations summary: Vidu Q4 Preview (Image to Video) description: >- Vidu Q4 Preview **image-to-video** — Vidu's newest model, with a native audio track (dialogue and sound effects) and output up to 4K. `image_url` is required and is used as the first frame; the output follows its aspect ratio. This model is image-to-video only: there is no text-to-video or start-end frame mode, so requests without `image_url`, or with `image_end_url`, are rejected. For reference-image generation use [`viduq4_preview_reference`](/api-reference/video-generations/viduq4-preview-reference) — passing `image_urls` here returns an error. **Pricing** — per second of generated video, in tokens (USD at $0.02/token): | resolution | tokens/s | USD/s | |---|---|---| | 540p | 2.925 | $0.0585 | | 720p | 6.175 | $0.1235 | | 1080p | 7.8 | $0.156 | | 2K | 12.35 | $0.247 | | 4K | 25.35 | $0.507 | The price is the same for both Vidu Q4 Preview models and does not depend on `generate_audio`. Example: an 8s 720p video costs 49.4 tokens (= $0.988). Returns an `img_uuid`; poll GET /api/v1/jobs/detail (or use `custom_callback_url`) to get the generated video. parameters: - name: Authorization in: header description: '' required: false example: '{{Authorization}}' schema: type: string requestBody: content: application/json: schema: type: object properties: model: type: string enum: - viduq4_preview description: Model name. Must be `viduq4_preview`. prompt: type: string description: >- Optional text prompt describing the motion and sound of the video. image_url: type: string format: uri description: >- First-frame image URL (required). png / jpeg / jpg / webp, max 50MB. The output video follows the image's aspect ratio. duration: type: integer minimum: 3 maximum: 16 default: 5 description: Video duration in seconds (3-16). Defaults to 5. resolution: type: string enum: - 540p - 720p - 1080p - 2K - 4K default: 720p description: >- Output resolution. Case-insensitive (`2k` and `2K` are both accepted). generate_audio: type: boolean default: true description: >- Whether the output contains a native audio track (dialogue and sound effects). Defaults to `true`. Turning it off does not change the price. custom_callback_url: type: string format: uri description: >- Optional. A publicly accessible HTTPS URL. When the task status changes (processing / success / failed), GoEnhance sends a POST request to this URL. The request body is identical to the response of GET /api/v1/jobs/detail. If your server does not respond with HTTP 200, the notification is retried up to 3 times, with a 3-second timeout per attempt. example: https://your-server.com/goenhance/callback required: - model - image_url example: model: viduq4_preview prompt: >- Rain keeps falling, steam rises from the ramen shop, the neon sign flickers softly image_url: https://your-cdn.com/first-frame.jpg duration: 8 resolution: 720p generate_audio: true responses: '200': description: '' content: application/json: schema: type: object properties: code: type: integer msg: type: string data: type: object properties: img_uuid: type: string cost: type: number description: >- Tokens deducted for this request. This is the amount actually charged, so it already reflects any discount active on your account and can be lower than the listed price. Tokens are deducted when the task is accepted, and refunded automatically if the generation ends in failure. example: 30.88 required: - img_uuid - cost required: - code - msg - data examples: '1': summary: Success value: code: 0 msg: Success data: img_uuid: c12b656c-747a-44fd-9c80-add79b0c52d5 cost: 30.88 '2': summary: Insufficient tokens value: code: 100 msg: tokens is not enough quota: summary: API key quota exceeded value: code: 101 msg: 'API key quota exceeded: 4990 of 5000 tokens used (monthly)' headers: {} '401': description: '' content: application/json: schema: type: object properties: code: type: integer msg: type: string required: - code - msg headers: {} deprecated: false security: [] ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.