sync-3 Avatar Image to Video

POST/v1/run

Sync Lipsync 3.0 is Sync Labs's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.

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 sync/sync-lipsync/3.0/image-to-video.

Default: sync/sync-lipsync/3.0/image-to-video

stringimagerequired

URL of the input image. sync-3 animates the face in the image so it lip-syncs to the provided audio (image-to-video). Supported image formats: JPEG, PNG and WebP.

Optional<string>audio

URL of the input audio. The output video matches its duration.

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": "sync/sync-lipsync/3.0/image-to-video",
  "image": "https://storage.googleapis.com/falserverless/example_inputs/echo-mimic-input-image.png",
  "audio": "https://fal.media/files/lion/vyFWygmZsIZlUO4s0nr2n.wav"
}'

# 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": "sync/sync-lipsync/3.0/image-to-video",
  "status": "running"
}