The Netrunner Rolling team has released an update to the latest version of vokoscreen in the blueshell repository.
This update fixes some issues that were reported with vokoscreen not recording after ffmpeg and other dependencies got updates.
To upgrade now just open up Octopi and select System Upgrade from the File menu or from the notification at bottom of the window (if present), or simply open a terminal window and run this command:
sudo pacman -Syu