API reference · Bytedance

bytedance/seedance/2.0/fast/reference-to-video

Integrate this model through SandBase's unified API, with production-ready schemas and examples.

VIDEOAsyncOpen model

Production endpoint

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OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDbytedance/seedance/2.0/fast/reference-to-video

Input Schema

7 parameters · 1 required · 6 optional

Parameter	Type	Required	Description
`prompt`	string	Required	The text prompt to generate a video from. · Min length: 3 · Max length: 50000 · Default: "Room is slowly getting filled from empty state to fully organized with furnitures. Camera is fixed timelapse."
`audios`	string[]	Optional	The URLs of reference audio files to guide video generation.
`images`	string[]	Optional	The URLs of reference images to guide video generation.
`videos`	string[]	Optional	The URLs of reference videos to guide video generation. Up to 3 MP4 or MOV files, 2-15 seconds combined duration, under 50 MB total.
`duration`	integer	Optional	The duration of the generated video in seconds. · Options: 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 · Default: 5 456789101112131415
`resolution`	string	Optional	The resolution of the video to generate. · Options: 480p, 720p · Default: "720p" 480p720p
`aspect_ratio`	string	Optional	The aspect ratio of the generated video. · Options: 16:9, 9:16, 1:1, 4:3, 3:4 16:99:161:14:33:4

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "bytedance/seedance/2.0/fast/reference-to-video",
  "images": [
    "https://static.sandbase.ai/examples/bfl/flux-1/fill/input_image_0.jpeg",
    "https://static.sandbase.ai/examples/alibaba/wan/2.2/animate/replace/input_image_0.png"
  ],
  "prompt": "Room is slowly getting filled from empty state to fully organized with furnitures. Camera is fixed timelapse.",
  "duration": 5,
  "resolution": "720p"
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

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