Function listMediaDevices

listMediaDevices(__namedParameters: HeadlessOptions): Promise<MediaDeviceList>
Cameras and microphones available for a device picker.

Uses the SDK's own getMediaDevicesList when the bag exposes it, so the result reflects the same mediaDevices instance the SDK captures with; otherwise falls back to navigator.mediaDevices.enumerateDevices().

Labels are blank until the user has granted permission once — call this after the first successful capture if you need readable device names.
Parameters
- __namedParameters: HeadlessOptions
Returns Promise<MediaDeviceList>
Example
```
const { cameras } = await listMediaDevices({ parameters });
await runMediaControl({
  parameters,
  control: 'switchVideo',
  extra: { videoPreference: cameras[1].deviceId },
});
```
- Defined in methods/utils/headless/participantState.ts:190