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

# Lip-sync a photo to any audio

> Percify lip-syncs a face in a photo to audio you record, upload or saved earlier, and charges 2 to 6 credits per second of audio.

Percify's lip-sync turns a still photo and an audio track into a talking video: the face in the photo is animated and its mouth follows the audio. The audio can be a recording you make in the browser, an audio file you upload, or a clip saved in **My Voices**. You pay per second of audio, from 2 credits a second on Fast to 6 on High at 720p.

## What you need

* A computer, with the desktop web app at [app.percify.io](https://app.percify.io).
* A photo with a clear, front-facing face.
* The audio: a recording of 5 to 60 seconds, an audio file under 10 MB, or a saved clip.

## How to lip-sync a photo

<Steps>
  <Step title="Open lip-sync">
    On the Explore page, click **Lip Sync Video** under Utility, or open **Clone Yourself** in the sidebar. Both start by asking for the photo.
  </Step>

  <Step title="Add the photo">
    Click **Upload Image** or **Use Camera**, check the preview and click **Continue**. To use a ready-made face instead, start from the [avatar library](/percify/avatar-studio).
  </Step>

  <Step title="Add the audio">
    On **Create Talking Avatar**, choose the source:

    * **Record**: tap the microphone, speak for 5 to 60 seconds and stop.
    * **Upload Audio** (on the Record tab): pick an audio file under 10 MB.
    * **My Voices**: pick a recording or a generated clip you saved before, for example [speech in your cloned voice](/percify/voice-cloning).
  </Step>

  <Step title="Pick mode and quality, then generate">
    Choose **Fast** or **High**, and **480p** or **720p** (720p needs High). When **Estimated cost** shows the credits, click **Generate video**. When it is ready, click **Download**.
  </Step>
</Steps>

## How much does it cost?

The cost is the per-second rate times the length of the audio. The server measures the audio file itself and rounds up to a whole second, so the charge follows the real length, not the timer.

| Mode | Quality | Credits per second | 20 second clip | 60 second clip |
| ---- | ------- | ------------------ | -------------- | -------------- |
| Fast | 480p    | 2                  | 40             | 120            |
| High | 480p    | 4                  | 80             | 240            |
| High | 720p    | 6                  | 120            | 360            |

The estimate appears as soon as the audio length is known ("Estimating cost…" means it is still loading). If your balance is too low the button reads **Not Enough Credits** and nothing is charged. See [how credits work](/percify/credits), and [refunds](/billing/refunds) if a video fails.

## Audio requirements

|                  | Value                                                      |
| ---------------- | ---------------------------------------------------------- |
| Recording length | At least 5 seconds; recording stops at 60 seconds          |
| Uploaded file    | Any audio file under 10 MB                                 |
| Silence          | A silent recording is refused before any charge            |
| Best results     | Clear audio without noise, a natural pace, 5 to 60 seconds |

## Lip-sync in the Playground and the API

The Playground lists the same lip-sync models as **InfiniteTalk Fast** (2 credits a second, minimum 4) and **InfiniteTalk** (4 credits a second at 480p, 6 at 720p, minimum 8). Each takes an image and an audio file. Use them to run lip-sync next to other models, or to copy an API call from the model page. API access requires the Scale or Ultra plan; see the [API introduction](/api-reference/introduction).

## Tips

* Trim silence from the start and end of an uploaded file. You pay for every second of it.
* Test a short clip on Fast before a long one on High.
* If the mouth drifts or the face does not move, try a sharper, front-facing photo and cleaner audio. See [lip-sync errors](/troubleshooting/lip-sync-errors).

<AccordionGroup>
  <Accordion title="Can I lip-sync an existing video?">
    Not in this generator: it animates a still photo. To change the language of speech in an existing video, use the video translation models described in [Dub a video](/create/dubbing).
  </Accordion>

  <Accordion title="Why was I charged for more seconds than I recorded?">
    The charge is based on the length of the saved audio file, measured on the server. A browser recording can run slightly longer than the timer showed.
  </Accordion>

  <Accordion title="Where do my lip-sync videos go?">
    They are listed on the History tab of Clone Yourself, and you can download each one.
  </Accordion>
</AccordionGroup>

## Related

<CardGroup cols={2}>
  <Card title="Make a talking avatar from a photo" icon="user" href="/percify/avatar-studio">
    Start from a ready-made face in the avatar library.
  </Card>

  <Card title="Create your AI twin" icon="clone" href="/create/clone-yourself">
    Lip-sync a photo of yourself to your own voice.
  </Card>

  <Card title="Lip-sync errors" icon="triangle-exclamation" href="/troubleshooting/lip-sync-errors">
    Fixes when the result looks out of sync.
  </Card>

  <Card title="Clone your voice" icon="microphone" href="/percify/voice-cloning">
    Make audio in your voice from typed text.
  </Card>
</CardGroup>