> ## Documentation Index > Fetch the complete documentation index at: https://docs.wizzx.ai/llms.txt > Use this file to discover all available pages before exploring further. # Seedance 1.5 Pro Video API > Unified Seedance 1.5 Pro text-to-video / image-to-video submission and polling with audio generation ## Quick start * Platform: Wizzx gateway; `Authorization: Bearer `. * Submit: `POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro` → returns `task_id`. * Poll: `POST https://api.wizzx.ai/api/v1/task/status` with `task_id`. * Modes: `text-to-video` / `image-to-video`; fixed 24fps; the current HTTP contract accepts 4-12 seconds and explicit 720p. * **Key feature**: `generate_audio` - generates video with synchronized audio (voice, sound effects, background music). ### Auth ```bash theme={null} Authorization: Bearer ``` ### Submit job Endpoint: `POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro`, `Content-Type: application/json` ### Required | Field | Type | Notes | | - | - | - | | `prompt` | string | Video description | | `type` | string | `text-to-video` or `image-to-video` | ### Optional | Field | Type | Default | Notes | | - | - | - | - | | `image_urls` | \[]string | - | Required for `image-to-video`, max 2 images (first frame + last frame) | | `duration` | int | 5 | `4` to `12` seconds; `-1` is temporarily rejected by gateway binding | | `resolution` | string | 720p | Explicit `720p`; `480p` is temporarily rejected by gateway binding | | `aspect_ratio` | string | adaptive | `16:9`, `4:3`, `1:1`, `3:4`, `9:16`, `21:9`, `adaptive` | | `seed` | int | -1 | RNG seed; -1 for random, range \[0, 4294967295] | | `watermark` | bool | false | Add watermark | | `camera_fixed` | bool | false | Lock camera position | | `generate_audio` | bool | true | Generate synchronized audio (voice, sound effects, music) | | `return_last_frame` | bool | false | Return the last frame image (useful for consecutive video generation) | > [!WARNING] > > **Image requirements (image-to-video)** > > * Formats: jpeg/png/webp/bmp/tiff/gif > * Aspect ratio: 0.4-2.5 > * Short side >300px, long side \<6000px > * Size \<30MB > * Max 2 images: first image = first frame, second image = last frame > [!NOTE] > > **First + Last Frame Support** > Seedance 1.5 Pro supports first frame + last frame image-to-video generation. Provide 2 images in `image_urls` to control both the start and end of your video. #### Example: Text2Video with Audio ```bash theme={null} curl -X POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro \ -H "Authorization: Bearer " \ -H "Content-Type: application/json" \ -d '{ "prompt": "A cat playing piano in a cozy living room, gentle jazz music playing", "type": "text-to-video", "duration": 8, "resolution": "720p", "aspect_ratio": "16:9", "generate_audio": true }' ``` #### Example: Text2Video without Audio ```bash theme={null} curl -X POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro \ -H "Authorization: Bearer " \ -H "Content-Type: application/json" \ -d '{ "prompt": "A serene mountain landscape with flowing clouds", "type": "text-to-video", "duration": 5, "resolution": "720p", "generate_audio": false }' ``` #### Example: Image2Video (First + Last Frame) ```bash theme={null} curl -X POST https://api.wizzx.ai/api/v1/task/submit/seedance-1.5-pro \ -H "Authorization: Bearer " \ -H "Content-Type: application/json" \ -d '{ "prompt": "The character walks forward gracefully and waves at the camera", "type": "image-to-video", "image_urls": [ "https://example.com/first_frame.jpg", "https://example.com/last_frame.jpg" ], "duration": 6, "resolution": "720p", "generate_audio": true }' ``` Success response: ```json theme={null} { "code": 0, "message": "success", "data": { "task_id": "4bbbc9e0-8de8-4f35-a31e-8596c1a6d18a", "model_key": "seedance-1.5-pro", "credits_deducted": 300 }, "request_id": "d54c66a8-0f0f-439c-bd3a-36f3fd275881" } ``` ### Query status Endpoint: `POST https://api.wizzx.ai/api/v1/task/status` ```json theme={null} { "task_id": "4bbbc9e0-8de8-4f35-a31e-8596c1a6d18a" } ``` Response example: ```json theme={null} { "code": 0, "message": "success", "data": { "task_id": "4bbbc9e0-8de8-4f35-a31e-8596c1a6d18a", "status": "SUCCEEDED", "result_urls": [ "https://cdn.example.com/video.mp4" ], "error": "", "credits_deducted": 300 }, "request_id": "499347b1-ff99-4ba2-a977-ad655431919d" } ``` Client-visible states: `PENDING`, `QUEUED`, `PROCESSING`, `REVIEW_REQUIRED`, `SUCCEEDED`, and `FAILED`. ### Pricing > [!WARNING] > > The backend catalog includes a 480p tier, but the current shared gateway binding rejects explicit 480p. Use 720p until the backend contract is fixed. Seedance 1.5 Pro pricing varies by resolution and audio generation: | Resolution | With Audio (credits/s) | Without Audio (credits/s) | | - | - | - | | 480p | 22 | 11 | | 720p | 50 | 25 | **Example costs (with audio):** | Resolution | 5s video | 8s video | 12s video | | - | - | - | - | | 480p | 110 credits | 176 credits | 264 credits | | 720p | 250 credits | 400 credits | 600 credits | **Example costs (without audio):** | Resolution | 5s video | 8s video | 12s video | | - | - | - | - | | 480p | 55 credits | 88 credits | 132 credits | | 720p | 125 credits | 200 credits | 300 credits | ### Seedance 1.5 Pro vs Seedance Pro Fast | Feature | Seedance 1.5 Pro | Seedance Pro Fast | | - | - | - | | Audio generation | Yes (default on) | No | | First + Last frame | Yes (2 images) | No (1 image only) | | Resolutions | Current HTTP contract: 720p | Omit for 480p; explicit 720p/1080p | | Duration range | Current HTTP contract: 4-12s | 5s or 10s | | Auto duration | Intended, but currently blocked by gateway binding | No | ### FAQ * **What's unique about Seedance 1.5 Pro?** Audio generation and first+last frame support for more controlled video creation. * **How does `generate_audio` work?** When enabled (default), the model generates synchronized audio including voice, sound effects, and background music based on your prompt. * **What's the difference between 1.5 Pro and Pro Fast?** 1.5 Pro adds audio generation and first+last frame control, but doesn't support 1080p resolution. Pro Fast is silent-only but supports higher resolution. * **How to create consecutive videos?** Use `return_last_frame: true` to get the last frame, then use it as the first frame for the next video. * **Why no 1080p?** Seedance 1.5 Pro currently only supports 480p and 720p resolutions. * **Can fps be changed?** Fixed at 24fps. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.