Seedance v1.5 Pro Image to Video

POST/v1/run

ByteDance Seedance v1.5 Pro image-to-video model transforming still images into cinematic video with native audio generation, camera control, and professional-grade output quality.

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/1.5/pro/image-to-video.

Default: bytedance/seedance/1.5/pro/image-to-video

stringpromptrequired

The text prompt to generate a video from.

Default: A girl holding a fox, the girl opens her eyes and gently looks at the camera, the fox is held gently, the camera slowly pulls back, the girl's hair is blown by the wind, and the sound of the wind can be heard.

stringimagerequired

The URL of the starting image for video generation.

Optional<string>end_image

The URL of the ending image for video generation.

Optional<integer>duration

Duration of the video in seconds.

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

Default: 5

Optional<string>aspect_ratio

The aspect ratio of the generated video.

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

Optional<string>resolution

The resolution of the video to generate.

Allowed values: 480p, 720p, 1080p

Default: 720p

Optional<boolean>camera_fixed

Whether to fix the camera position.

Default: false

Optional<boolean>generate_audio

Whether to generate audio for the video.

Default: true

Optional<integer>seed

The random seed used for generation.

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/1.5/pro/image-to-video",
  "prompt": "A girl holding a fox, the girl opens her eyes and gently looks at the camera, the fox is held gently, the camera slowly pulls back, the girl's hair is blown by the wind, and the sound of the wind can be heard.",
  "image": "https://p9-arcosite.byteimg.com/tos-cn-i-goo7wpa0wc/a28ec84ff9fc4287a0d98191020a3218~tplv-goo7wpa0wc-image.image",
  "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/1.5/pro/image-to-video",
  "status": "running"
}