Backdrop

Video and audio projection app for your streaming content on macOS

Features

• Select and display video input properties supported
• Change video resolution supported
• Select audio input/output supported
• Best for sharing your screen with friends on Live Streaming Apps like Discord

Interface

1. Close app
2. Enter or exit fullscreen
3. Hide UI
4. Video input picker
5. Audio input picker
6. Audio output picker

Build an app from source code

Prerequisite

• Xcode
• JDK 17
• Terminal or alternative CLI Tools

git clone https://github.com/akexorcist/backdrop.git
cd backdrop
./gradlew run

Build and install an app on your macOS device with self-signed certificates

• Build an app to .dmg file with ./gradlew packageDmg
  • Output file will be in <project>/build/compose/binaries/main/dmg
• Open .dmg file and move the app to Applications directory
• Create self-signed certificate from Keychain Access
  • Keychain access > Certificate Assistant > Create a Certificate...
  • Identity Type: Self Signed Root
  • Certificate Type: Code Signing
• Do manual codesign in command line with your self-signed certificate
  • codesign -fs <certificate_name> --deep <path_to_app>
  • codesign -fs Akexorcist --deep /Applications/Backdrop.app
• Finally, you can run the app on your machine with your self-signed certificate

Powered by

• Compose Multiplatform
• Material 3
• Webcam Capture API
• Native Driver for Webcam Capture API

Troubleshooting

The video list does not refresh when a device is plugged in

There's an issue with the Webcam Capture API. For a workaround, close the app and reopen it

License

Apache License, Version 2.0