iOS Screen Capture shows red screen when displayed in local `RTCView`

Description:

When sharing your screen from an iOS (15.6) device, the RTCView that displays the stream locally shows a red screen. I’ve also noticed the same issue on a demo app I’ve created very similar to this one.

With the same demo app on Android, I do get the hall of mirrors effect, but on iOS, for some reason, it just shows a red screen.

Steps to reproduce:

1. Open Jitsi-Meet on iPhone device
2. Connect to a conference room
3. Start screen sharing

Expected behavior:

Like Android, I’d expect to see a hall-of-mirrors effect on the local RTCView.

Actual behavior:

Instead, we get a straight red screen. Below is a screenshot of the iOS app with the issue exposed.

Server information:

• Jitsi Meet version: N/A
• Operating System: N/A

Client information:

• Browser / app version: 22.4.0 build 1657277707
• Operating System: iOS 15.6

Additional information:

I’ve also created a very similar demo app that, instead of displaying the screen capture locally, it uses PeerJS to share the stream to a remote device. In that case, I can see the iPhone screen fine on the remote device. So, this seems to be an issue when displaying the screen capture on a local RTCView. Not sure if this is an iOS restriction to prevent hall-of-mirrors, or if it’s a bug, hence the creation of this issue.

[saghul]

Ah sorry I had misunderstood you! This is when you are sharing from the device itself. Yes, I can repro. And yeah, we should be showing the avatar to allow the hall-of-mirrors effect.

Thanks for the report!

[saghul]

Screen sharing does not work on the simulator, alas.