> ## 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

> Animate a still portrait into a talking video driven by speech audio, using sync.so's sync-3 model.

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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