Pattern to record: Level meters move on one endpoint while the call uses another.

Trace video, input and output separately

Identify the USB webcam selected in the call application and test video separately from any built-in microphone. Bluetooth headset audio is a different path and does not explain USB camera capture failure by itself. The application or operating system listens to a different input than intended; this concerns an actual microphone endpoint and is separate from camera image capture.

Compare the failing connection

1. Compare another USB port and application, check privacy permission and test sustained capture.
2. Name and test each input and inspect application-specific selections.

Before changing the setup

Disconnect any cable with crushed insulation or an overheating camera. Muting or deleting every endpoint can break later calls.

Restore the intended function

If the checks support this cause, choose the intended device and disable only genuinely unused routes. Verification should cover video, microphone if fitted, multiple applications, sleep and a sustained call.

For an assessment of your computer and external webcam, contact AEPC in Burswood or call 027 908 8880. Provide the model and the conditions that reproduce this problem. Workshop visits are by appointment.