Swap | AI Portrait Transfer API

PixVerse Swap — Video Swap Model

PixVerse Swap generates high-quality video clips by swapping the person, objects, or background of a source video using a reference image. It preserves the original motion, timing, and camera work while replacing the visual target with the new look from the image.

What it does

Takes a source video (performance, camera motion, timing).
Takes a reference image (new person, object, or background).
Replaces the selected target in the video with the content from the image.
Keeps motion, expressions, and framing consistent so the edit feels natural.

Ideal for:

Turning talking-head videos into stylized or character performances
Swapping outfits, props, or featured products
Dropping your subject into new scenes without reshooting

Inputs and Controls

video (required) Source clip whose motion, expressions, and timing you want to keep.
image (required) Reference image that defines the new person, object, or background.
resolution
360p
540p
720p
mode
person – Replace the main person in the video with the person or character from the image.
object – Replace a key object (for example, smartphone, product, prop) with the object in the image.
background – Keep the subject but replace the scene behind them using the reference image.

Pricing

Resolution	Swap price per second
360p	$0.090
540p	$0.090
720p	$0.120

P.S: $0.020 per request for mask selection (charged once per job).

How to Use

Upload or paste the URL of your source video.
Upload or paste the URL of the reference image that contains the new person, object, or background.
Choose the resolution (360p, 540p, or 720p) according to your quality and cost needs.
Select the mode:

person for full character swap,
object for prop/product replacement,
background to move your subject into a different environment.

Click Run and wait for the processed video to appear in the preview panel.
Review the result and download if you are satisfied.

Notes

An uploaded video in supported formats (mp4, mov)
Max resolution: 1920
Max file size: 50MB
Max duration: 30 seconds

Swap API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/pixverse/swap with your input as JSON. The endpoint returns a prediction id; poll the prediction endpoint until status flips to completed, then read the output URL from data.outputs[0]. Examples for Swap below.

HTTP example

# Submit the prediction
curl -X POST "https://api.wavespeed.ai/api/v3/pixverse/swap" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "image": "https://example.com/your-input.jpg",
    "video": "https://example.com/your-input.mp4",
    "resolution": "720p",
    "mode": "person"
}'

# Response includes a prediction id. Poll for the result:
curl -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# When status is "completed", read the output from data.outputs[0].

Node.js example

// npm install wavespeed
const WaveSpeed = require('wavespeed');

const client = new WaveSpeed(); // reads WAVESPEED_API_KEY from env

const result = await client.run("pixverse/swap", {
        "image": "https://example.com/your-input.jpg",
        "video": "https://example.com/your-input.mp4",
        "resolution": "720p",
        "mode": "person"
});

console.log(result.outputs[0]); // → URL of the generated output

Python example

# pip install wavespeed
import wavespeed

output = wavespeed.run(
    "pixverse/swap",
    {
    "image": "https://example.com/your-input.jpg",
    "video": "https://example.com/your-input.mp4",
    "resolution": "720p",
    "mode": "person"
}
)

print(output["outputs"][0])  # → URL of the generated output

Swap API — Frequently asked questions

What is the Swap API?

Swap is a Pixverse model for AI inference, exposed as a REST API on WaveSpeedAI. PixVerse Swap replaces backgrounds, people, and objects directly inside existing videos for quick scene changes and creative edits with natural-looking results. Ready-to-use REST inference API, best performance, no cold starts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Swap API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID; poll the prediction endpoint until status flips to "completed", then read the output URL from the result. The playground generates a ready-to-paste code sample in Python, JavaScript, or cURL for whatever inputs you've set. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/pixverse/pixverse-swap.

How much does Swap cost per run?

Swap starts at $0.090 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Swap accept?

Key inputs: `image`, `video`, `resolution`, `mode`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/pixverse/pixverse-swap.

How long does Swap take to generate?

Average end-to-end generation time on WaveSpeedAI is around 223 seconds per request — measured across recent runs. Queue time scales with global demand; live status is visible in the prediction record.

Can I use Swap outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (Pixverse). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

ExamplesView all

Related Models

README