Windows 10 anniversary update is still being rolled out to users.
I already updated and found that my TestCap based virtual video drivers does not work anymore with multiple apps simultaneously.
The same applies to AVStream based driver.
From what I observe, Windows does not call driver functions anymore in the client app (Skype, flash, etc) thread.
Instead, driver has only one 'svchost.exe' client now.
So it looks like operating system now controls which app is communicating to webcams.
Like for any real hardware webcam, only one application can connect to virtual camera at the moment.
When the second application is trying to connect - it displays "Camera is busy", "Unable to connect", etc (exact message text is up to the client app).
Does anybody know what kind of breaking change is that? Does it sound like a bug and thus worth contacting Microsoft?
Or is it just a dawn of virtual webcam apps?