MediaDevices QML Type

MediaDevices provides information about available multimedia input and output devices. More...

• List of all members, including inherited members

Properties

• audioInputs : list<audioDevice>
• audioOutputs : list<audioDevice>
• defaultAudioInput : audioDevice
• defaultAudioOutput : audioDevice
• defaultVideoInput : cameraDevice
• videoInputs : list<cameraDevice>

Detailed Description

The MediaDevices type provides information about the available multimedia devices and the system defaults. It monitors the following three groups:

• Audio input devices (Microphones)
• Audio output devices (Speakers, Headsets)
• Video input devices (Cameras)

MediaDevices provides a separate list for each device group. If it detects that a new device has been connected to the system or an attached device has been disconnected from the system, it will update the corresponding device list and emit a signal notifying about the change.

MediaDevices monitors the system defaults for each device group. It will notify about any changes done through the system settings. For example, if the user selects a new default audio output in the system settings, MediaDevices will update the default audio output accordingly and emit a signal. If the system does not provide a default for a camera or an audio input, MediaDevices will select the first device from the list as the default device.

While using the default input and output devices is often sufficient for playing back or recording multimedia, there is often a need to explicitly select the device to be used.

For example, the snippet below will ensure that the media player always uses the systems default audio output device for playback:

MediaDevices {
    id: devices
}
MediaPlayer {
    ...
    audioOutput: AudioOutput {
        device: devices.defaultAudioOutput
    }
}

See also Camera, AudioInput, and VideoOutput.

Property Documentation