How to Fix Lagging Video in Webex

The short answer

Lagging or freezing video in Webex is usually caused by one of four things: an unstable or congested network connection, a computer that is overloaded during the call, a camera or cable problem, or the connection of the person whose video you are watching. The fastest way to fix it is to work out which of these applies before changing settings. Close other heavy apps, move closer to your router or use a wired connection, turn off virtual backgrounds and other video effects, and check whether your camera runs smoothly outside Webex. Then rejoin the meeting and compare.

One distinction changes the whole diagnosis. Are other people telling you that your video is lagging, or is the video you are receiving from others choppy? Problems with your own outgoing video can come from your camera, your computer or your upload connection. Choppy incoming video can come from your download connection, your computer, or the other person's setup, and you cannot fix their side yourself.

Work out whose video is lagging

What you notice | Most likely area | Where to start

Others say your video freezes or stutters, but their video looks fine to you | Your camera, computer load or upload connection | Test your camera outside Webex, then check your network and turn off effects

Everyone's video lags on your screen | Your download connection or your computer's performance | Check your network and close heavy apps

Only one participant's video lags, for you and for others | That participant's camera, computer or connection | Let them know; this guide's steps apply on their end

Your own self-view preview is choppy even before joining | Camera, cable, USB port, effects or computer load | Test the camera in another app and remove effects

Video lags but audio is clear | Often bandwidth or processing limits, since video needs far more of both than audio | Reduce video load and check your network

Both audio and video break up or drop | Often the network connection | Start with the network steps

Treat this table as a starting point, not a diagnosis. Several causes can overlap, for example a weak Wi-Fi signal and a busy computer at the same time.

Before you start

• Note how you join Webex: the desktop app, a web browser or a mobile device. Some settings differ between them.
• Note how you are connected: Wi-Fi, wired Ethernet or mobile data.
• If possible, schedule a short test meeting with a colleague or a second device so you can check the result from both sides.
• Save any open work before restarting apps or your computer.

Step-by-step fixes, with how to tell they worked

These steps start with quick, reversible checks and move toward deeper changes. After each one, check the result before moving on. That way you learn what actually caused the problem.

1. Check the camera outside Webex

Open your operating system's built-in camera app, or another app that shows a live camera preview, with Webex fully closed. Move your hand across the frame and watch whether the motion is smooth.

How to read the result: if the preview is also choppy here, the problem is likely the camera, its cable or port, its drivers, or your computer's performance, not Webex or your network. If the preview is smooth here but lags in Webex, the camera hardware is probably fine, so focus on the network, Webex settings or effects.

For an external USB webcam, try a different USB port and plug it directly into the computer instead of through a hub or dock. A shared or underpowered hub can limit the camera. Low light can also make some webcams lower their frame rate, which looks like lag, so try the test again in brighter, even lighting.

2. Make sure only one app is using the camera

Close other video-calling apps, camera utilities and browser tabs that may have requested camera access. On many systems, two apps competing for the same camera can cause a frozen or black image, or an error.

Keep in mind that Webex being allowed to use the camera, the camera actually capturing video, and the video arriving smoothly for other people are three separate things. A working permission does not prove good call quality, and a frozen picture is not always a permission issue.

3. Improve the network connection

• Use a wired Ethernet connection if you can. Wired connections are generally more stable than Wi-Fi.
• If you must use Wi-Fi, move closer to the router and reduce walls or obstacles between you and it.
• Pause large downloads, cloud backups, game updates and video streaming on your device and, where practical, on other devices in your home.
• Close browser tabs and apps that use the internet heavily in the background.
• If you are on a VPN, check with your IT team whether you can join without it or whether a different VPN setting is recommended. VPNs can add delay.

How to tell it worked: rejoin a meeting and ask another participant whether your video is smoother, and watch whether their video is smoother for you. If Webex in your version shows a network or connection quality indicator during the meeting, compare it before and after the change.

Evidence gap: no verified bandwidth or speed figures were available for this guide. If you want to compare a speed test result with Webex's requirements, check Cisco's current official documentation for your account type and video quality, as requirements can change.

4. Turn off virtual backgrounds, blur and other video effects

Virtual backgrounds, background blur, touch-up filters and similar effects are processed by your computer in real time. On older or busy machines, this extra work can slow down your outgoing video. Turn effects off in Webex's video settings and see if your self-view and others' view of you improve.

If you need a tidy backdrop without the processing load, a simple physical background behind you, such as a plain wall, needs no video processing at all. That is different from a virtual call effect, which replaces your surroundings in software during the call.

5. Reduce the load on your computer

• Close apps you do not need during the call, especially other video apps, games, video editors and heavy browser tabs.
• On a laptop, plug in the charger. Many laptops reduce performance on battery or in power-saving modes.
• Open your system's task manager or activity monitor during a call and see whether the processor or memory is near its limit.
• If the laptop is hot, give it airflow. Overheating can cause the system to slow itself down.

How to tell it worked: your self-view preview becomes smoother, and the system monitor shows less load during the call.

6. Check Webex's video settings

In Webex's audio and video settings, confirm the correct camera is selected, especially if you have both a built-in and an external camera. If your version offers options related to video quality or high-definition video, lowering them can reduce the bandwidth and processing needed. Menu names and available options vary between the desktop app, browser and mobile versions and between releases, so look for video or camera settings in your version rather than relying on an exact path.

When others' video lags for you, switching from a grid view with many video tiles to a view that shows fewer videos at once can reduce the load on your device and connection.

7. Update, restart and try a different way to join

• Fully quit Webex and reopen it, then rejoin the meeting.
• Install any available Webex updates.
• Install operating system updates and, if available, updated camera or graphics drivers.
• Restart your computer, which clears stuck processes that may be holding onto the camera or the network.
• If you use the browser version, try the desktop app, or the other way round. If the problem only appears in one, the cause is likely specific to that version or its settings.
• In a browser, try a different supported browser, or turn the browser's hardware acceleration setting on or off and restart the browser. Which choice helps depends on your computer and graphics drivers.

What a successful test proves, and what it doesn't

A smooth preview in your camera app shows that the camera, its connection and your computer can capture video smoothly. It does not test your network or how Webex handles the video. A smooth self-view in Webex is a good sign for capture and processing, but it does not show how your video looks to others, since that also depends on your upload connection and theirs. The most reliable check is a short test meeting where someone else confirms what they see, ideally including some movement on camera.

When to stop troubleshooting and get help

• The camera is choppy in every app, on every port, even after a restart and driver update: the camera itself may be faulty. Try a different camera if you have one to confirm.
• Lag happens only on your work network or VPN: contact your IT team, since firewall, proxy or VPN settings may be limiting video traffic.
• Only one other participant's video lags: share these steps with them, since the cause is probably on their end.
• The problem continues across devices and networks, or appears across your whole organization: report it to your Webex administrator or Cisco support with details such as when it happens, how you join and what you have already tried.

Limits of this guide

No specific measurements, bandwidth thresholds, hardware requirements or version-specific menu paths were confirmed for this guide, so none are given here. The causes listed are common possibilities, not confirmed diagnoses for your setup. For exact system and network requirements, refer to Cisco's current official Webex documentation.