Qubes OS Screenshare

Allows for a window running inside of one Qube to be safely shared with another Qube.

This can be useful for sharing a screencast of an application running in one Qube with another Qube running a video conferencing software such as Zoom.

Dependencies

Debian Template VM

• python3-gi
• python3-pil
• python3-xlib

Installation

1. Copy the qvm-screenshare-client.py and qvm-screenshare-server.py files under the /usr/local/bin directory for each AppVM that you would like to use in the screen sharing.

2. Copy the share_qube_screen.py script into your home directory in dom0.

⚠️ Since share_qube_screen.py runs in dom0, it is recommended that you vet the script before running it. ⚠️

Usage

1. In the Qube with the application to be shared, run xwininfo to get the Window ID of the application window to be shared.

2. In dom0, run python3 share_qube_screen.py --from_qube {{ ApplicationQube }} --to_qube {{ ConferenceQube }} --window_id {{ Window ID From Step 1 }}

Limitations

• Currently, only a window size of 1024x768 is supported. This resizing will automatically happen when share_qube_screen.py runs.