# MediaDevices

The `mediaDevices` API that enables access to input devices such as cameras and microphones, as well as the ability to capture media streams from those devices.

## Public method summary

| **Method**                                  | **Description**                                       | **Parameters**                                                                                                                                                                                                                                                |
| ------------------------------------------- | ----------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| getMediaDevices()                           | Returns the list of available for using media devices |                                                                                                                                                                                                                                                               |
| setAudioConstraints(deviceId)               | Selects the audio device for the session              |                                                                                                                                                                                                                                                               |
| setVideoConstraints(deviceId)               | Selects the video device for the session              |                                                                                                                                                                                                                                                               |
| doPreview(constraints)                      | Returns a preview stream for session                  |                                                                                                                                                                                                                                                               |
| changeMediaDevice(deviceId, type, selector) | Allows the user to change media device                | <ul><li>deviceId - id of selected device provided by getMediaDevices() method</li><li>type - type of device to change. Possible values are: \['camera', 'microphone', 'speaker']</li><li>querySelector for video element to replace a stream object</li></ul> |