---
title: "Testing with a Camera or Microphone"
slug: "media-stream-testing"
updated: 2026-02-03T08:25:12Z
published: 2026-02-03T08:25:12Z
canonical: "helpcenter.autify.com/media-stream-testing"
---

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

# Testing with a Camera or Microphone

This article explains how to test applications that use a camera or microphone.

## Allow permissions

Use this when you want the browser to automatically allow camera and microphone permissions in a specific scenario.

1. Open the target scenario.
2. Add a **Playwright code step** to Step 1.
3. Enter the following Playwright code.

```typescript
await context.grantPermissions(['microphone', 'camera']);
```
4. Click **Save**.

## Use dummy video and audio

This section explains how to allow camera and microphone permissions and use dummy video/audio.

> [!WARNING]
> This setting affects all recordings and test runs executed in your local environment.

1. Open **Settings** at the bottom of the menu.
2. Open **Advanced settings**.
3. Click the edit button for **Enter JSON string**, then enter the following JSON in the input field.

```json
{
  "permissions": ["microphone", "camera"],
  "launchOptions": {
    "args": [
      "--use-fake-device-for-media-stream",
      "--use-fake-ui-for-media-stream"
    ]
  }
}
```
4. Click **Save**.

### Specify any file

> [!WARNING]
> This setting is available only for local runs and cannot be used for cloud runs.

If you want to use a specified audio/video file instead of dummy media, add the following configuration to `launchOptions.args`.

```json
{
  "permissions": ["microphone", "camera"],
  "launchOptions": {
    "args": [
      "--use-fake-device-for-media-stream",
      "--use-fake-ui-for-media-stream",
      "--use-file-for-fake-audio-capture=/path/to/audio.wav",
      "--use-file-for-fake-video-capture=/path/to/video.y4m"
    ]
  }
}
```

- `--use-file-for-fake-audio-capture`: Path to the audio file (WAV recommended)
- `--use-file-for-fake-video-capture`: Path to the video file (Y4M recommended)
- Specify the file path as an absolute path on your local machine.

## Notes

- Some video conferencing tools may not work in headless mode (mode where the browser is not displayed). If the test fails, turn off headless mode and run it again.