> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# SyncTalkingImageNode - ComfyUI Built-in Node Documentation

> Complete documentation for the SyncTalkingImageNode node in ComfyUI. Learn its inputs, outputs, parameters and usage.

Animate a still portrait into a talking video driven by speech audio, using sync.so's sync-3 model. The output duration matches the audio duration, and cost scales with output duration.

## Inputs

| Parameter           | Description                                                                                                                                                                                                                             | Data Type | Required | Range                            |
| ------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- | -------- | -------------------------------- |
| `image`             | A single image with a clearly visible face, up to 4K (4096x2160).                                                                                                                                                                       | IMAGE     | Yes      | Exactly one image required       |
| `audio`             | Speech audio driving the talking video; the output duration matches it. Chain any TTS node here to drive the animation from text.                                                                                                       | AUDIO     | Yes      | Maximum duration: 600 seconds    |
| `prompt`            | Optional guidance for how the portrait comes to life, e.g. 'make the subject smile and look at the camera'. Leave empty for natural talking motion. (default: "")                                                                       | STRING    | No       | Multiline text                   |
| `seed`              | Seed controls whether the node should re-run; results are non-deterministic regardless of seed. (default: 0)                                                                                                                            | INT       | No       | 0 to 2147483647                  |
| `model`             | sync.so generation model. Image input is exclusive to sync-3.                                                                                                                                                                           | COMBO     | Yes      | `"sync-3"`                       |
| `speaker_selection` | Which face to animate when several people are visible. `default`: let the model decide. `coordinates`: target the face at pixel (speaker\_x, speaker\_y) in the image. Auto-detection is not supported for images. (default: "default") | COMBO     | No       | `"default"`<br />`"coordinates"` |
| `speaker_x`         | X pixel coordinate of the speaker's face. Only used when speaker\_selection is 'coordinates'. (default: 0)                                                                                                                              | INT       | No       | 0 to 4096                        |
| `speaker_y`         | Y pixel coordinate of the speaker's face. Only used when speaker\_selection is 'coordinates'. (default: 0)                                                                                                                              | INT       | No       | 0 to 4096                        |
| `auto_downscale`    | Automatically downscale the image if it exceeds the 4K (4096x2160) input limit; speaker coordinates are scaled to match. When disabled, an oversized image raises an error instead. (default: True)                                     | BOOLEAN   | No       | True<br />False                  |

**Note:** The `speaker_x` and `speaker_y` parameters are only used when `speaker_selection` is set to `"coordinates"`. When `auto_downscale` is enabled, speaker coordinates are automatically scaled to match the downscaled image dimensions.

## Outputs

| Output Name | Description                                                                             | Data Type |
| ----------- | --------------------------------------------------------------------------------------- | --------- |
| `video`     | The generated talking video with the animated portrait synchronized to the input audio. | VIDEO     |

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/SyncTalkingImageNode/en.md)

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