Teams Video Flickering: Causes, Fixes and What It Means for Your Webcam Audio

The short answer

Flickering video in Microsoft Teams usually comes from one of three places: the room lighting interacting with the camera's exposure, the connection between the webcam and the computer (USB port, hub, cable or power), or the way Teams and the graphics system process the video. Lighting-related flicker leaves your audio untouched. A connection or power fault can disrupt both picture and sound, because a USB webcam typically sends its video and its built-in microphone over the same cable. The quickest way to tell the causes apart is to check whether the flicker also appears outside Teams.

No measured test data or version-specific bug reports were supplied for this guide. The steps below rest on general camera and USB principles and are not a guarantee for any particular webcam model, Teams build or operating system version.

First step: is it Teams or the camera?

Open the same webcam in another app, such as the built-in Camera app on Windows or Photo Booth or FaceTime on a Mac, under the same lighting. The result tells you where to look next.

• Flicker appears in every app: the cause is most likely lighting, the camera's settings, or the USB connection.
• Flicker appears only in Teams: the cause is more likely Teams' video processing, background effects, graphics acceleration or another app competing for the camera.
• Flicker appears only after a call has run for a while: suspect heat, power delivery, USB power-saving or system load rather than lighting.

Lighting and anti-flicker settings

Fluorescent tubes and many LED lamps pulse with the mains power frequency. The pulsing is too fast for your eyes to notice, but a camera sampling at a mismatched exposure time can record it as rolling bands or rhythmic brightness changes. Power in the US runs at 60 Hz, while much of Europe and Asia uses 50 Hz.

• Look in your webcam's companion utility for a setting labeled anti-flicker, power line frequency, or 50 Hz / 60 Hz. In the US, choose 60 Hz.
• Add daylight or a steady, good-quality light source. In a dim room the camera lengthens its exposure and keeps readjusting, and those adjustments can look like flicker or pulsing.
• Avoid placing a bright window or lamp directly behind you. Strong backlighting makes auto-exposure hunt between the bright background and your face.
• If brightness keeps pumping up and down, try switching auto-exposure off and setting it manually in the webcam software, if your model offers that option.

Connection, power and USB issues

Brief blackouts, frozen frames or flashing are often caused by the webcam briefly losing its connection or running short of USB bandwidth. This symptom matters most for audio, because the webcam's built-in microphone usually depends on the same connection.

• Plug the webcam directly into a port on the computer instead of a hub or dock, and try a different port.
• If you must use a hub, choose a powered one and disconnect other high-bandwidth devices such as external drives or a second camera.
• Replace any extension cable, or try a shorter one.
• On Windows, USB selective suspend and similar power-saving options can cut power to devices. Consider turning them off while you test.
• Lower the camera's resolution or frame rate in its utility to see whether the problem eases. If it does, bandwidth or processing load is the likely cause.

Teams-specific causes

• Turn off background blur, background images and video filters. These effects use extra processing power and can produce flickering edges, especially in poor light.
• Close other apps that may be using the camera, such as other meeting apps, browser tabs, virtual camera software or the webcam's own preview window.
• Update Teams and your graphics drivers. Some Teams versions have offered an option to disable GPU hardware acceleration. Where that option exists, toggling it is a reasonable test, but its availability varies between classic and new Teams.
• In Teams' device settings, confirm the intended camera is selected and not a virtual camera or a different built-in camera.
• If only one other participant reports the flicker, the cause may be their connection or display rather than your camera.

Video flickering in Teams on a Mac

The same lighting and USB principles apply on macOS. A few Mac-specific points are worth checking:

• Make sure Teams has permission to use the camera and microphone in System Settings under Privacy & Security. Reset and re-grant the permission if it looks wrong.
• If an iPhone is nearby, Continuity Camera may switch Teams to the phone camera. Confirm which camera is selected in Teams.
• USB-C hubs and docks are common on Macs. Test with the webcam connected directly, or through a single high-quality adapter.
• Test the camera in Photo Booth or FaceTime. If those apps flicker too, the cause is outside Teams.
• Mac webcam utilities vary in what they support. If your webcam's software offers a 50/60 Hz setting, use it. If it doesn't, rely on improved lighting.

What this means for speech capture

Whether flicker affects your voice depends on its cause:

• Lighting-related flicker affects only the image. Your microphone audio is unaffected.
• Connection or power dropouts can cut or distort audio from the webcam's built-in microphone at the same moments the video glitches. Listeners may hear gaps, crackles or a sudden switch to another microphone.
• Heavy system load from effects or graphics problems can sometimes cause both choppy video and robotic or delayed audio, because both share the same processing time.

To isolate the problem, select a different microphone in Teams' device settings while you troubleshoot. A laptop's internal mic or a headset works. If the audio problems disappear while the video still flickers, the webcam connection is the likely shared fault. If the audio stays clean on the webcam mic and only the picture flickers, the cause is almost certainly lighting or camera processing. For important calls, a separate microphone removes the dependency on the webcam's connection entirely.

When to suspect the webcam itself

Hardware is the likely cause if the flicker persists across apps, ports, computers and lighting conditions, or if the camera disconnects when you move its cable. In that case, contact the manufacturer's support or check warranty coverage. No model-specific fault data was available for this guide, so it cannot say which webcams are prone to the problem.