---
title: "Audio-to-Video"
method: POST
path: "/v1/audio-to-video"
tags: ["Video Projects"]
---

# Audio-to-Video

`POST /v1/audio-to-video`

**What this API does**

Create the same Audio To Video you can make in the browser, but programmatically, so you can automate it, run it at scale, or connect it to your own app or workflow.
    
**Good for**
- Automation and batch processing  
- Adding audio to video into apps, pipelines, or tools  

**How it works (3 steps)**
1) Upload your inputs (video, image, or audio) with [Generate Upload URLs](https://docs.magichour.ai/api-reference/files/generate-asset-upload-urls) and copy the `file_path`.  
2) Send a request to create a audio to video job with the basic fields.  
3) Check the job status until it's `complete`, then download the result from `downloads`.

**Key options**
- Inputs: usually a file, sometimes a YouTube link, depending on project type  
- Resolution: free users are limited to 576px; higher plans unlock HD and larger sizes  
- Extra fields: e.g. `face_swap_mode`, `start_seconds`/`end_seconds`, or a text prompt  

**Cost**  
Credits are only charged for the frames that actually render. You'll see an estimate when the job is queued, and the final total after it's done.

For detailed examples, see the [product page](https://magichour.ai/products/audio-to-video).

## Request body

- object
  - `name` string — Give your video a custom name for easy identification.
  - `start_seconds` number, float — Start time of your clip (seconds). Must be ≥ 0.
  - `end_seconds` number, float, required — End time of your clip (seconds). Must be greater than start_seconds.
  - `resolution` '480p' | '720p' | '1080p' — Output video resolution. Defaults to `720p` on paid tiers and `480p` on free tiers.
  - `assets` object, required — Provide the audio file and an optional reference image.
    - `audio_file_path` string, required — The path of the audio file. This value is either - a direct URL to the video file - `file_path` field from the response of the [upload urls API](https://docs.magichour.ai/api-reference/files/generate-asset-upload-urls). See the [file upload guide](https://docs.magichour.ai/api-reference/files/generate-asset-upload-urls#input-file) for details.
    - `image_file_path` string — Reference image for the initial frame of the video. This value is either - a direct URL to the video file - `file_path` field from the response of the [upload urls API](https://docs.magichour.ai/api-reference/files/generate-asset-upload-urls). See the [file upload guide](https://docs.magichour.ai/api-reference/files/generate-asset-upload-urls#input-file) for details.
  - `style` object — Attributes used to dictate the style of the output
    - `prompt` string — Prompt to guide the visual style of the video.

## Response `200`

Success

- object — Success
  - `id` string, required — Unique ID of the video. Use it with the [Get video Project API](https://docs.magichour.ai/api-reference/video-projects/get-video-details) to fetch status and downloads.
  - `credits_charged` integer, required — The amount of credits deducted from your account to generate the video. If the status is not 'complete', this value is an estimate and may be adjusted upon completion based on the actual FPS of the output video. If video generation fails, credits will be refunded, and this field will be updated to include the refund.

## Other responses

- `400` — Invalid Request
- `401` — Unauthorized
- `402` — Payment Required
- `404` — Not Found
- `422` — Unprocessable Entity

---

[API](https://skmtc.net/magichourhq/apis/magic-hour-api.md) · [All operations](https://skmtc.net/magichourhq/apis/magic-hour-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/magichourhq/magic-hour-api/versions/941298cfb29f/schema)