StreamLive ProThe live studio is slow and my computer is struggling
The browser studio lags, the fan roars or the CPU cell turns red. How to read the studio's System health, which effects cost the most, and what to switch off first.
When the browser studio lags on a laptop, the cause is almost always the work the browser does on your own computer for every frame: background blur, virtual backgrounds, green screen, many layers and many cameras at once. Each of them is worked out in your browser, many times a second. The studio shows how hard it is working in the status zone at the end of the Live Studio bar: CPU, fps and network. Switch off the heaviest effect first, close other tabs, and watch the numbers come down.
This page is about your computer. If the studio says it lowered the quality because your upload is slow, that is a different problem: The studio lowered my live quality by itself. If you broadcast from OBS or vMix and see dropped frames: My live stream drops frames or keeps buffering.
Symptom, likely cause, fix
| What you see | Likely cause | Fix |
|---|---|---|
| The CPU cell is amber or red | The studio tab is busy most of the time | Turn off background blur or virtual background first, then close other tabs |
| fps below 50, or red below 24 | The studio cannot draw every frame in time | Hide layers you do not use, remove cameras you do not need |
| Lag starts when you key a green screen | The browser could not use the graphics card for the key, so the processor does it | Use one keyed camera at a time; close other heavy apps |
| Lag starts when you turn on blur or Virtual Background | An AI model cuts you out of the room on every frame | Use a green screen instead, or turn the effect off |
| Everything is smooth but viewers see a soft picture | Not the computer: the upload | The studio lowered my live quality by itself |
Read System health
The status zone at the end of the Live Studio bar shows three numbers. Click it to open System health with more detail.
| Row | What it means | When to act |
|---|---|---|
| Tab load (CPU) | How much of the time the browser was busy with the studio tab. It is not the load of the whole computer | Amber from 50%, red from 80%. Over 80%: close tabs or lower the quality |
| Frames per second | How often the studio draws its picture | 50 to 60 is normal. Amber below 50, red below 24 |
| Network | The connection the browser reports | See The studio lowered my live quality by itself if the broadcast falls behind |
| Stream quality | The resolution and bitrate you broadcast | Set in the settings tab |
| Memory | How much memory the studio tab uses. Shown only in browsers that report it | Compare before and after you remove inputs |
The numbers are measured in this browser only and nothing is sent. The podcast studio has no status zone; the same causes and fixes apply there.
Steps
- Open System health by clicking the CPU, fps and network cells at the end of the Live Studio bar. Note the numbers before you change anything.
- Turn off Blur background or Virtual Background on cameras that do not need it (the camera's settings, General tab). These are usually the heaviest effects: Virtual background and background blur in a live.
- Check the green screen. Keep the key only on the camera that stands in front of a screen. A key that has to run on the processor costs much more than one on the graphics card: Green screen in the browser studio, step by step.
- Hide layers you do not use. Every shown layer inside an input is drawn again for every frame. Untick the box on the row of the Layers tab: Scenes and layers in the browser studio: build a scene.
- Remove inputs you do not need. Each camera and each playing video is still shown on its tile, even when it is not on air.
- Close other tabs and apps. Another video call, a second studio tab, a game or a video editor compete for the same processor.
- Lower the broadcast resolution if the numbers stay red. On Live stream, the settings tab, Stream Quality: 720p asks less of the computer than 1080p. The choice applies the next time you go live.
What the studio already does to save work
- Cameras are never asked for more than they offer. The studio asks a camera for at most 1920 pixels wide and prefers 30 frames per second, so a 4K webcam does not flood the browser: My camera picture is low resolution in the studio.
- The green screen tries the graphics card first. The Colour Key runs on the graphics card when the browser allows it, and falls back to the processor only when it does not.
- Tiles with effects share one painter. A tile that shows a keyed, cropped or filtered picture is refreshed about ten times a second, not at full speed.
When to contact support
If System health stays red with one camera and no effects on a computer that runs other video apps smoothly, write to [email protected]. Send the numbers from System health (Tab load, Frames per second, Memory), the browser and its version, the computer model, which inputs and effects were on, and a screenshot of the studio bar.
Frequently asked questions
Why is the browser studio slow on my laptop?
Most often an effect that runs on your computer for every frame: background blur, a virtual background, a green screen or many layers. Turn them off one by one and watch System health.
Is the CPU number the load of my whole computer?
No. It shows how busy the browser was with the studio tab. Other apps can still slow the computer without showing there.
What frame rate should the studio show?
50 to 60 frames per second is normal. Below 50 the cell turns amber and below 24 red.
Does a green screen use more power than background blur?
It depends on the computer. The green screen key runs on the graphics card when the browser allows it, while blur and virtual backgrounds run an AI model on every frame. Try each and compare System health.
Will lowering the resolution help?
Often, yes. 720p asks less of the computer and of the upload than 1080p. Change it in the settings tab before you go live.
Keep reading
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