Fix webcam flickering in OBS

The short answer

Webcam flicker in OBS usually comes from one of two places. The first is the interaction between your room lighting and the camera's exposure. The second is an unstable capture path: a USB connection that drops or runs short of bandwidth, or the camera being opened by more than one app or OBS source. In the US, mains power runs at 60 Hz. A frequent fix for rolling bands or pulsing brightness is to set the camera's anti-flicker (power line frequency) control to 60 Hz and lower or disable automatic exposure. Black flashes or brief freezes point more toward the connection or a device conflict than toward lighting.

This is general troubleshooting guidance. No model-specific test data was available for this guide, and the exact names and locations of settings vary by camera driver, operating system and OBS version. Treat each cause below as a hypothesis until a check confirms it.

Why flicker matters for webcam audio

If you use the webcam's built-in microphone, its audio usually travels over the same USB connection as the video. Lighting-related flicker affects only the image, so it should leave speech capture untouched. A connection problem can interrupt both at once. When the picture flashes black or freezes, listen back to a recording at those moments. Gaps, clicks or dropouts in your voice at the same instants are strong evidence that the problem is the USB link, power or the device itself, not the lights.

Identify which kind of flicker you have

What you see | Most likely area | First check

Horizontal bands rolling slowly up or down the image | Lighting frequency vs. exposure | Set anti-flicker to 60 Hz (US) and reduce exposure time

Whole image pulsing brighter and darker | Auto exposure or auto white balance hunting, or dimmed LED lights | Lock exposure and white balance; raise lights to full brightness

Brief black frames or the feed blinking out | Device conflict, USB bandwidth or power | Close other camera apps; check for duplicate sources; change port

Stutter or repeated frames rather than brightness change | Frame rate or format mismatch, system load | Match camera FPS to OBS; try a different video format

Flicker visible in the preview but not in the recording | Display or preview rendering | Check the recorded file before changing camera settings

Step-by-step: isolate the cause

Work through these checks in order. Each one is reversible, and each result tells you where to go next.

1. Confirm the flicker is in the recording

Make a short test recording that includes you speaking, then play the file back. If the flicker appears only in the OBS preview and not in the file, the camera and capture chain are probably fine. Focus on preview or display behaviour instead. If the flicker is in the file, continue. Note whether the audio stays continuous during the flicker; this result guides step 6.

2. Test with different lighting

Turn off the room's artificial lights and use daylight, or switch to a different light source. If the flicker disappears, lighting is the cause. LED bulbs on a dimmer and fluorescent tubes are common culprits because their output varies rapidly with the power cycle. Fixes, from least to most effort:

• Set the camera's power line frequency or anti-flicker control to 60 Hz (the US mains frequency). Where an Auto option exists, try both Auto and an explicit 60 Hz setting.
• Turn off auto exposure and choose an exposure time that does not create bands. Longer exposures tend to average out the light's flicker; very short ones make it visible.
• If a light is dimmable, run it at full brightness. Many dimmed LEDs flicker more.
• Replace the problem light with one that does not flicker on camera.

Where to find these controls depends on your setup. In OBS on Windows, the Video Capture Device properties include a Configure Video button that opens the driver's own settings dialog, where these controls often appear. On Linux, the V4L2 capture source typically lists the camera's controls directly. On macOS, or when the controls are missing, the camera maker's own software may be the only way to change them. Some cameras do not expose an anti-flicker setting at all; that is a limitation of the hardware or driver, not something OBS can add.

3. Compare the camera outside OBS

Close OBS completely and open the webcam in another camera app under the same lighting. If it also flickers there, the cause lies with the camera, its settings, the lighting or the connection, not with OBS. If it is clean there but flickers in OBS, move to step 4.

4. Check OBS capture settings

• Make sure no other app is using the camera at the same time, such as a meeting app, the camera maker's utility or a browser tab.
• Check whether the same camera is added as a source in several scenes. Reusing one source in other scenes, or enabling Deactivate when not showing where appropriate, can prevent the device from being reopened repeatedly.
• Set Resolution/FPS Type to Custom and choose a resolution and frame rate the camera actually supports. Make the frame rate match or divide evenly into the OBS output frame rate.
• Try a different video format. Uncompressed formats such as YUY2 need much more USB bandwidth at high resolutions than MJPEG, and a bandwidth shortfall can show up as dropped or black frames.
• Toggle the Buffering option, then test again.
• Remove filters and effects on the camera source temporarily, including any camera effects applied by the operating system or vendor software.

Change one setting at a time and record a short test after each. If one change removes the flicker, that setting is your fix, and you can restore the others.

5. Check the USB connection

Plug the webcam directly into the computer rather than through an unpowered hub, extension or dock, and try a different port. If the cable detaches from the camera, try another cable. Avoid sharing the same USB controller with other high-bandwidth devices, such as a second camera or a capture card, where you can. If the flicker stops after a port or cable change, the connection was the cause.

6. Use the audio as a diagnostic signal

Look back at the test recordings you made with the webcam mic. If the audio drops out exactly when the picture blinks, the device is likely briefly disconnecting or stalling. That points to the USB link, power or the camera's hardware. If the audio stays clean while the video flickers, the problem is more likely confined to image processing, settings or lighting.

While you troubleshoot, you can protect your speech capture by recording voice from a separate microphone. A video glitch then cannot interrupt your audio. If you keep the webcam mic, check in the OBS audio mixer that it is captured only once. Capturing it both through the video source and as a separate audio input can cause doubled or echoey sound, which is a separate issue from the flicker.

7. Rule out software and system load

Update OBS and the camera's driver or vendor software, or temporarily remove the vendor software if it may be conflicting with OBS. On laptops with two graphics processors, check which one OBS is running on. If OBS reports rendering lag or skipped frames under heavy load, lower the output resolution or frame rate and test whether the flicker eases.

When service or replacement makes sense

Consider the camera itself faulty when the flicker or dropouts persist across different apps, USB ports, cables and lighting conditions. A test on a second computer is the strongest check. Intermittent disconnects that also cut the built-in microphone, and that follow the camera from one computer to another, are a particularly strong sign of a hardware or cable fault. In that case, contact the manufacturer about warranty support before buying a replacement. If the flicker appears only under one light source and no anti-flicker setting is available, changing the light is usually cheaper than changing the camera.

What this guide cannot confirm

No camera-specific measurements, model compatibility data or test results were available for this guide. Which controls your camera exposes, which formats and frame rates it supports, and how its microphone is routed all depend on the specific model and driver. Your own controlled tests, changing one variable at a time, are the reliable way to confirm the cause on your setup.