Hi snailspace1,
Thank you for using the Apple Support Communities! We understand the audio and video options in FaceTime are grayed out on your MacBook Pro. Let's see how we can help.
When was the last time you were able to make calls on your Mac using FaceTime? Do you recall any changes to your Mac or Apple ID account since the issue began?
Can you receive calls without issue, or does that fail as well?
Are you receiving a specific alert when you open or attempt to make FaceTime calls?
Is this an issue when attempting to call any contact, or just certain ones?
Check out this article to see if it can help get the issue resolved: If FaceTime isn't working on your Mac. We'd also recommend making sure you've selected your microphone and camera for FaceTime: Choose a camera or microphone for FaceTime calls on Mac
Best regards.