The Sampler AR Video node provides a specialized sampling method for autoregressive video models, such as those using Causal Forcing or Self-Forcing techniques. It manages all parameters related to the autoregressive (AR) loop directly within the workflow, making it easy to configure how the model generates video frames one step at a time.

## Inputs

| Parameter | Description | Data Type | Required | Range |
| --- | --- | --- | --- | --- |
| `num_frame_per_block` | Frames per autoregressive block. A value of 1 means the model generates one frame at a time (framewise), while a value of 3 means it generates three frames together (chunkwise). This setting must match the checkpoint's training mode. Default: 1. | INT | Yes | 1 to 64 |

## Outputs

| Output Name | Description | Data Type |
| --- | --- | --- |
| `SAMPLER` | A configured sampler object that uses the "ar_video" sampling function with the specified autoregressive parameters. | SAMPLER |

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