Appearance

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 an accepted generation task. Poll the result endpoint with the returned id for terminal outputs or errors.

Optional<string>error

Error message if the task failed. Empty on success.

stringidrequired

Unique identifier for the generation task.

Optional<string>model

Model ID used for the prediction.

Optional<array>outputs

Array of generated content. Empty when status is not completed.

stringstatusrequired

Status of the task: pending, running, completed, failed, or timeout.

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

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