getAllScreensMedia
is an API that allows clients to capture all monitors
attached to a device at once without user interaction. It is only available in
managed sessions for allow-listed web apps and it is a requirement
that the user must be informed about capturing at all times. The usage
indicator cannot be prevented by the web app.
Web developers have expressed interest for such an API in order to meet legal and internal compliance requirements.
- Contact centers may require full documentation of provided information for compliance and / or training purposes.
- In the financial industry a consultant may provide financial advice digitally and a complete documentation of the information may be required by law in some jurisdictions.
- Internet usage in prisons may require full traceability to allow convicts to access the internet.
getAllScreensMedia
can be used similarly to getDisplayMedia
with
a few differences:
getAllScreensMedia
returns a promise to a sequence ofMediaStreams
(oneMediaStream
per monitor).- Constraints cannot be passed in the
getAllScreensMedia
call. Constraints may be different depending on the monitor and information determining the desired constraints (resolution, size, …) is likely only available after the monitor was captured. Constraints can be applied on the returnedMediaStreamTrack
withapplyConstraints
. getAllScreensMedia
will only be available for web apps allowlisted by a policy.- Usage indicators must be shown to the user at all times.
getAllScreensMedia
will use ScreenCaptureMediaStreamTrack
(which is a
subclass of MediaStreamTrack
) in the returned MediaStream
which provides
access to monitor details analogous to the
getScreenDetails API.
partial interface MediaDevices {
Promise<sequence<MediaStream>> getAllScreensMedia();
}
interface ScreenCaptureMediaStreamTrack : MediaStreamTrack {
ScreenDetailed screenDetailed();
}
try {
const mediaStreams = await navigator.mediaDevices.getAllScreensMedia();
mediaStreams.forEach((mediaStream, index) => {
files.push(saveToFile(mediaStream));
})
} catch (e) {
console.log('Unable to acquire screen captures: ' + e);
}