Webcam Freezes During Calls: 10 Causes and Fixes

Updated: June 2026

Quick answer: Webcam freezes during calls usually come from one of three things: another app holding the camera, USB bandwidth saturation, or network packet loss being mistaken for a webcam problem. Close other camera apps, plug the webcam into a different USB port, and check your network with a speed test in another tab.

TL;DR — Fix freeze in 2 minutes

  1. Close Zoom, Teams, Snap Camera, OBS, Skype, anything that may hold the camera.
  2. Unplug the webcam, plug into a different USB 3.0 port (motherboard, not hub).
  3. Test your internet speed — packet loss looks like a webcam freeze.
  4. Reduce call video resolution to 720p in the app's video settings.
  5. Update or reinstall the webcam driver.

Is it the webcam or the network?

First identify what's actually freezing. If audio also freezes — network. If audio continues — webcam. Check the small preview in the call app: if it's smooth there but the other party sees a freeze, it's network upload.

Detailed Guide — 10 causes

1. Another app is holding the camera

Only one app can use a webcam at a time on most systems. Browser tabs with old camera permissions, OBS background processes, and Snap Camera are common culprits.

  • Windows: Task Manager → check for camera-using processes.
  • macOS: open Activity Monitor → look for camera-related apps.
  • Close all browser tabs that requested camera access.

2. USB bandwidth saturated

A 4K webcam plus an external SSD on the same USB controller can saturate USB 3.0 bandwidth. The webcam stutters as packets are dropped. Fix: move the webcam to a different USB controller (different physical port on the motherboard).

3. Network packet loss

Wi-Fi drops or jitter looks identical to a camera freeze. The receiving end sees frozen frames; the sender sees a healthy preview. Switch to Ethernet, or move closer to the router.

4. CPU throttling

Laptops on battery or in hot environments throttle the CPU; encoding a webcam feed at 1080p60 may then exceed available cycles. Plug in the charger; turn off CPU-heavy background apps (Chrome with 50 tabs, video editing).

5. Outdated driver

Webcam drivers can develop bugs after OS updates. Reinstall:

  • Windows: Device Manager → Cameras → uninstall device, reboot, let Windows reinstall.
  • macOS: no separate webcam driver — uninstall and reinstall the camera app (Camo, Logitech).

6. App-side video encoding bug

Some app versions have known freeze bugs (Zoom 5.x at one point froze on Apple Silicon when virtual background was on). Update the app and disable virtual background as a test.

7. Bluetooth interference with 2.4 GHz Wi-Fi

USB 3.0 ports emit noise at 2.4 GHz which can disrupt Wi-Fi. If using a USB 3.0 webcam on the same side as your Wi-Fi adapter, move to USB 2.0 port or use a USB extension to physically separate them.

8. Power management putting the USB to sleep

Windows Power Options can let USB ports sleep. Symptoms: freeze every 5–10 minutes. Fix: Power Options → USB settings → USB selective suspend → Disabled.

9. Faulty USB cable

Cheap or damaged USB cables drop data. If the freeze is intermittent and random, try a known-good USB 3.0 cable (or the one that came with the webcam).

10. Failing webcam

If freeze persists across cables, ports, and apps — the webcam may be dying. Test on a different computer; if it freezes there too, replace the webcam.

FAQ

Why does my webcam freeze only in Zoom but work in Teams?
Each app has different encoding load. Zoom may use higher resolution by default. Lower Zoom's video to 720p in Settings → Video.

Will a USB hub cause freezes?
Yes — passive hubs share bandwidth and can drop the webcam. Use a powered USB 3.0 hub or plug directly into the PC.

Why does the freeze happen on Wi-Fi but not Ethernet?
Wi-Fi has more packet loss and jitter than wired. Ethernet drops packet loss to near zero. Confirms it's a network issue, not a camera one.

Does my CPU matter for webcam?
Yes — encoding 1080p60 needs ~10% of a modern 4-core CPU. Old 2-core CPUs at full load can drop frames.

Should I disable the integrated camera if I use external?
Only if it confuses apps. Disable in Device Manager (Windows) or System Settings (macOS).

Key Takeaways

  • Most freezes are USB bandwidth, another app holding the camera, or network — not the webcam.
  • Switch to wired Ethernet to rule out Wi-Fi jitter.
  • Update or reinstall webcam driver after OS upgrades.
  • USB 3.0 ports emit 2.4 GHz noise that can disrupt Wi-Fi.

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