GUIDE深度 · Deep dive
Camera and Mic Permissions
Camera/mic failures usually sit at three layers: browser site permission, OS privacy settings and app exclusivity. Check the address-bar icon, then OS settings, then close meeting/streaming/recording apps. If it still fails, try another browser, port or cable before blaming the hardware.
Browser: address-bar icon, allow.
OS: Privacy, Microphone/Camera.
Apps: close whatever locks the device.
Try another browser/port/cable.
Restart the browser, update the OS.
FAQ
Why no permission prompt?
You may have denied it before or the OS blocks it; restore it manually in settings.
What if it's a work computer?
Group policy/security software may block it; contact IT.