Sunburn Desktop

Desktop client for Sunburn with per-app audio capture for screen sharing.

Features

• Full voice/video/screen sharing (Chromium WebRTC)
• Per-app audio capture — share audio from a specific application, not your entire system
  • Linux: PipeWire integration
  • Windows: WASAPI per-process capture
• Custom screen share picker with audio source selection
• Auto-updates — notifies you when a new version is available
• Persistent login sessions

Install

Linux (AppImage)

Download the latest AppImage from Releases.

chmod +x Sunburn-*.AppImage
./Sunburn-*.AppImage

To add to your app launcher:

# Move to a permanent location
mkdir -p ~/.local/bin
mv Sunburn-*.AppImage ~/.local/bin/sunburn

Or install AppImageLauncher for automatic desktop integration:

# Arch Linux
yay -S appimagelauncher

Then double-click the AppImage and it will offer to integrate into your app menu.

Windows

Download Sunburn-Setup-*.exe from Releases and run the installer.

Note: Per-app audio capture requires Windows 10 Build 2004 (May 2020) or later.

Updates

The app checks for updates automatically every 30 minutes. When an update is available, a banner appears at the top of the app. Click "Restart to update" to apply it.

Development

npm install
npm start

Building

# Linux AppImage
npm run build:linux

# Windows installer (cross-compile via Wine)
npm run build:win

# Both
npm run build:all

Releasing

Releases are automated by CI (.forgejo/workflows/release.yml). To ship an update:

1. Bump version in package.json.
2. Merge to master.

On push to master the runner builds both platforms and publishes them to the rolling latest Forgejo release; the auto-updater picks it up automatically. The job skips if latest already serves the current version. Requires a RELEASE_TOKEN repo secret with release-write access.

Per-App Audio Capture

When screen sharing, the app shows a custom picker with two sections:

1. Screens/Windows — select what to share visually
2. Audio Sources — select which app's audio to include

How it works

• Linux: Creates a PipeWire loopback that routes the selected app's audio output to a virtual capture source
• Windows: Uses WASAPI application-loopback to capture audio from a specific process ID