Bug 209739

Summary:	iOS 13.4 enumerateDevices() does not report the camera after the first call
Product:	WebKit	Reporter:	milen <milen.yordanov>
Component:	WebRTC	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	youennf
Priority:	P2
Version:	Safari 13
Hardware:	Unspecified
OS:	iOS 13

Description milen 2020-03-30 07:24:54 PDT

Tested on iPhone 7, iOS 13.4

Open Mobile Safari and go to https://milen-yordanov.github.io/webrtc-ios13_4-enumerateDevices/

The first call to enumerateDevices() reports two devices: videoinput and audioinput.

The second call to enumerateDevices() reports two devices: audioinput and audioinput. There is no videoinput!

The code to reproduce it is as simple as:

await navigator.mediaDevices.enumerateDevices()
await navigator.mediaDevices.enumerateDevices()
 

See: https://raw.githubusercontent.com/milen-yordanov/webrtc-ios13_4-enumerateDevices/master/index.html

Older iOS 13.x and 12.x did not have this issue.

Comment 1 youenn fablet 2020-03-30 07:26:41 PDT

This is a dupe of bug 209417 which is now fixed in WebKit ToT.

*** This bug has been marked as a duplicate of bug 209417 ***

Comment 2 youenn fablet 2020-03-30 07:32:31 PDT

There are a number of workarounds:
- On iOS, all devices running Safari should have a camera.
- Add a shim to enumerateDevices so as to buffer the result of enumerateDevices until capture is granted/devicechange event is fired.