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Wan 2.1 VACE Long Reframe

POST/v1/run

Wan 2.1 Vace is Alibaba's video-to-video AI model. Transform, enhance, and edit video content using text prompts - from style changes to object manipulation and scene modification.

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 alibaba/wan/2.1/vace/long-reframe.

Default: alibaba/wan/2.1/vace/long-reframe

stringpromptrequired

The text prompt to guide video generation. Optional for reframing.

Default:

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<string>video

URL to the source video file. This video will be used as a reference for the reframe task.

Optional<string>resolution

Resolution of the generated video.

Allowed values: auto, 240p, 360p, 480p, 720p

Default: auto

Optional<integer>seed

Random seed for reproducibility. If None, a random seed is chosen.

Optional<boolean>paste_back

Whether to paste back the reframed scene to the original video.

Default: true

Optional<number>scene_threshold

Threshold for scene detection sensitivity (0-100). Lower values detect more scenes.

Range: 0 to 100

Default: 30

Optional<number>zoom_factor

Zoom factor for the video. When this value is greater than 0, the video will be zoomed in by this factor (in relation to the canvas size,) cutting off the edges of the video. A value of 0 means no zoom.

Range: 0 to 0.9

Default: 0

Optional<boolean>trim_borders

Whether to trim borders from the video.

Default: true

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: video-to-video

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async