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VirtualCameraDriver

Windows virtual camera driver using the AVStream minidriver.

This project was a challenge for myself. I wanted to create a virtual camera driver for Windows.

The project has two parts: the Windows driver and the user mode apps which can push frames to the driver.

Driver

The driver is based on the avshws driver example from Microsoft.

The filter implemented in this driver is extended with a custom property which accepts a buffer (1280x720, RGB), this buffer is then copied to the output buffer.

  • GUID of the property set: {CB043957-7B35-456E-9B61-5513930F4D8E}
  • ID of the property: 0

Accessing this property can be done using DirectShow.

Driver installation:

After building the driver (Windows SDK and Windows Driver Kit required) the inf can be installed using hdwwiz.exe (can be launched in CMD).

Test signing might be required to be enabled for driver installation: bcdedit.exe -set TESTSIGNING ON

UserMode apps

These applications can push frames to the driver using the property exposed in the filter. The apps are based on the driver interface library which handles enumerating devices and setting the value of the property. This is written in VC++.

There are two example applications:

  • UserDriverStaticImage: This app can push static images to the driver.
  • UserDriverCanon: This application can push the live view of a Canon EOS camera to the driver, essentially turning it into a webcam. EDSDK not included in this repository!