Seedance 1.0 Pro Fast I2V

POST/v1/run

Seedance 1.0 Pro by ByteDance - animate still images into dynamic videos with AI. Transform photos into cinematic clips with natural motion, camera movement, and optional audio generation.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to bytedance/seedance/1.0/pro/fast/image-to-video.

Default: bytedance/seedance/1.0/pro/fast/image-to-video

stringpromptrequired

The text prompt used to generate the video

stringimagerequired

The URL of the image used to generate video

Optional<string>resolution

Video resolution - 480p for faster generation, 720p for balance, 1080p for higher quality

Allowed values: 480p, 720p, 1080p

Default: 1080p

Optional<integer>duration

Duration of the video in seconds

Allowed values: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12

Default: 5

Optional<integer>num_frames

The number of frames to generate. If provided, will override duration.

Range: 29 to 289

Optional<boolean>camera_fixed

Whether to fix the camera position

Default: false

Optional<string>aspect_ratio

The aspect ratio of the generated image.

Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16

Optional<integer>seed

Random seed to control video generation. Use -1 for random.

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque SandBase run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

Allowed values: pending, running, completed, failed, timeout

Optional<string>model

Public SandBase model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: image-to-video

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedance/1.0/pro/fast/image-to-video",
  "prompt": "Bathed in a stark spotlight, a lone ballet dancer takes center stage. Her movements, precise and graceful, tell a story of passion and dedication against the velvet darkness. The scene evokes a sense of intimacy, highlighting the raw emotion and artistry of her performance.",
  "image": "https://static.sandbase.ai/examples/bytedance/seedance/1.0/pro/fast/image-to-video/input_image_0.png",
  "duration": 5,
  "aspect_ratio": "21:9"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/f3d2e8a1-7c4b-4a12-9d2e-123456789abc \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "f3d2e8a1-7c4b-4a12-9d2e-123456789abc",
  "model": "bytedance/seedance/1.0/pro/fast/image-to-video",
  "status": "running"
}