With the release of Cablecast 6.4 an update to the Blackmagic Desktop Video drivers is required.
LINK TO DRIVERS:
After downloading the installer linked above please run the MSI package.
Click "Next" to start the installation wizard and follow the on screen instructions to complete the installation. You will be prompted to restart the server (if not, restart the server once the installation is complete)
At the end of the driver installation, once the server restarts, you should be prompted to update the firmware on the encoder card.
Click "Update Now" to start the firmware upgrade.
Please wait until the firmware update has completed then choose the shutdown option to complete the installation.