Support for selecting and streaming a secondary display (like scrcpy's --display)

[lopez-victor]

Hi, first of all thanks for your great app!

I'm currently using ScreenStream to stream the screen of my Android device over RTSP, and it works very well. However, my device has two displays (a primary and a secondary screen), and I would like to stream the secondary display instead of the main one.

As far as I understand, the app currently uses the default MediaProjection, which only captures the primary display (Display 0). Would it be possible to add support for selecting another display (e.g., Display 1)?

It would be great if the app included a setting under the transmission settings to choose the display ID — similar to how scrcpy supports --display .

This feature would be very helpful for users with foldables, HDMI output, or other dual-screen setups.

Thanks in advance, and keep up the great work!

[dkrivoruchko]

Hi.
Can you share you device name and Android version ?

[lopez-victor]

Hi, thanks for the quick response.

Right now we are using 3 types of devices:

• Tinkerboard - Android 12
• Raspeberry Pi 4 & Raspberry Pi 5 - Android 15

[dkrivoruchko]

After some research,
I found that this is a confirmed bug in Android versions 13 and up. Unfortunately, it's outside of my control. The system dialog is supposed to allow you to select the display you want to capture, but it's broken and just defaults to the main screen. The permission token we receive is locked to the primary display, so we can't switch to a different one.

Google Issue Tracker #268268869

Some have suggested using DisplayManager. While this sounds promising, it's not a viable solution for a standard app. Pulling the video stream from a different physical display requires using private, unsupported Android APIs.

Tools that can do this, like Scrcpy, use these "hidden" methods. However, that's a strict no-go for an app on the Play Store.

For now, there is no way to do this. Sorry.

[lopez-victor]

Unfortunate.

Thank you very much for your time and explanation.