daily-virtual-camera: A Swift repository from Daily

Camera Extension template

This is an implementation of camera extension app (as shown in this WWDC video). It will add a new device to the OS and will appear when navigator.mediaDevices.enumerateDevices() is called.

More info on developing camera extensions can be found here.

requirements

apple dev team credentials
gstreamer (>= 1.22.0)

for a bare-bones, gstreamer-less boilerplate template version, checkout boilerplate-template branch

installation

open daily-virtual-camera.xcodeproj in xcode
select the Daily Virtual Camera scheme

3. build app

4. copy app from build directory to `/Applications`

 $ cp $HOME/Library/Developer/Xcode/DerivedData/daily-virtual-camera-.../Build/Products/Debug/daily-virtual-camera.app /Applications

open daily-virtual-camera.app from /Applications and click install virtual camera
follow prompts to allow installation

usage

After install, the camera will be in devices list, even after the installation app is closed. That's it!

$ systemextensionsctl list
1 extension(s)
--- com.apple.system_extension.cmio
enabled active  teamID  bundleID (version)  name  [state]
* * EEBGKV9N3N  co.daily.daily-virtual-camera.cam (1.0/1)  cam [activated enabled]

$ ffmpeg -f avfoundation -list_devices true -i ""
...
[AVFoundation indev @ 0x7fb15bf05700] AVFoundation video devices:
[AVFoundation indev @ 0x7fb15bf05700] [0] FaceTime HD Camera (Built-in)
[AVFoundation indev @ 0x7fb15bf05700] [1] Daily Virtual Camera <========================
[AVFoundation indev @ 0x7fb15bf05700] [2] Capture screen 0

usage+ javascript hack

update the camera name if changed
use the javascript snippet in your browser console.
optional: pass in different fake media
await initGUM('Daily Virtual Camera', 'https://bestfakemedia.biz/faux.mp4')

uninstallation

open the app and click uninstall and go through the security & privacy permissions song and dance. note: device will not be fully uninstalled until the computer is rebooted.

$ systemextensionsctl list
1 extension(s)
--- com.apple.system_extension.cmio
enabled active  teamID  bundleID (version)  name  [state]
    EEBGKV9N3N  co.daily.daily-virtual-camera.cam (1.0/1)  cam [terminated waiting to uninstall on reboot]

development

If you want to generate your own fake media within the app, main.swift is where you can change the camera name and you can also do more interesting camera things like changing the default GStreamer video source... Go wild.