How to zoom and frame a webcam in OBS

OBS Studio has no single zoom slider for webcams. You zoom in by cropping the camera image and then enlarging what remains to fill the frame. This is digital zoom, and it lowers sharpness because fewer camera pixels cover the same area. Some cameras also offer optical or hardware zoom, which you reach through the camera's own settings rather than through OBS's cropping tools. The steps below cover both, plus how to confirm the framing looks right.

The short answer

• Hold Alt (Option on macOS) and drag an edge of the webcam source in the preview to crop it.
• Drag a corner handle to scale the cropped image back up until it fills the canvas.
• For exact values, right-click the source and choose Transform, then Edit Transform, and type crop and size numbers.
• If your camera supports hardware zoom, try its settings first. On Windows this is usually under Configure Video in the source's properties.

Which zoom method fits your situation

Method | Where it lives | Best for | Limitation

Transform crop and scale | The source in the preview, or Edit Transform | Quick framing in one scene | Applies only to that scene's copy of the source

Crop/Pad filter | The source's Filters window | The same crop in every scene that uses the camera | Still digital zoom, so detail is lost

Camera hardware zoom | Camera driver or manufacturer software | Keeping more detail when the camera supports it | Many webcams have no hardware zoom

Animated zoom during a stream | Studio Mode transitions or third-party plugins | Moving between a wide shot and a close shot live | Takes extra setup, and plugin features vary

Before you start

• Add the camera as a Video Capture Device source in your scene. If the preview is black, another app may be using the camera, or the operating system may be blocking OBS from accessing it.
• Check your canvas size under Settings, then Video, then Base (Canvas) Resolution. Your framing is measured against this frame.
• In the camera source's properties, set the camera to its highest resolution that runs smoothly. Starting with more pixels leaves more detail after you crop.

Seeing a live picture in OBS confirms only that OBS can open and capture the camera. It says nothing yet about framing, sharpness or how the image will look once a call or streaming app compresses it.

Method 1: Crop and scale in the preview

• 1. Click the webcam source in the Sources list so a red outline appears in the preview.
• 2. Hold Alt (Option on macOS) and drag the top, bottom or side edges inward to trim away what you don't want. A crop shows as a green edge on the outline.
• 3. Release the key, then drag a corner handle outward to enlarge the cropped image. Corner dragging normally keeps the proportions intact.
• 4. Drag the image into position so your face sits where you want it. A common choice is eyes about one-third down from the top, with a little space above your head.
• 5. To start over, right-click the source and choose Transform, then Reset Transform.

Success check: the camera fills the canvas with no black bars at the edges, and the outline shows green crop edges where you trimmed.

Method 2: Enter exact values with Edit Transform

Dragging by eye can be fiddly. Right-click the source and choose Transform, then Edit Transform (Ctrl+E on Windows and Linux, Cmd+E on macOS). The dialog has crop fields for Left, Right, Top and Bottom, measured in camera pixels. It also has Size and Position fields for placing the result on the canvas.

• Crop the same number of pixels from opposite sides to keep the shot centered.
• Crop in the same proportion as your canvas to avoid stretching. For example, on a 16:9 canvas, remove 16 parts horizontally for every 9 vertically.
• To fill the canvas without stretching, set Bounding Box Type to Scale to outer bounds and the bounding box size to your canvas resolution.

Success check: faces and round objects look natural rather than squeezed or widened. Reopening Edit Transform shows the numbers you entered.

Method 3: Use a Crop/Pad filter for consistent framing

A transform crop belongs to one placement of the source in one scene. If the same camera appears in several scenes and you want the same framing in all of them, put the crop on the source itself. Right-click the source, choose Filters, add Crop/Pad under Effect Filters, and enter values for each side. Then scale the source in each scene as needed.

Success check: switch between scenes that use the camera. Each one shows the same cropped area.

Method 4: Use the camera's own zoom, if it has one

On Windows, open the camera source's properties and click Configure Video. This opens the driver's settings window, which may include a camera control section with Zoom, Focus, Pan and Tilt. On Linux, supported controls usually appear directly in the source properties. On macOS, OBS generally does not expose these controls, so you would need the manufacturer's software if it offers zoom. Whether any of this works depends on your camera, and many webcams have no hardware zoom at all. If the Zoom control is missing or greyed out, use cropping instead.

Also check focus. Cameras with autofocus can refocus on the background when you lean away. If the driver offers a manual focus control, setting it while you sit in your normal position can keep the image steady.

Check the result before you go live

• Look at the preview at full size, for example in a fullscreen projector, and judge sharpness. Heavy cropping on a lower-resolution camera can look soft or blocky.
• Move around as you naturally would on a call to make sure you stay in frame.
• Record a short test clip and play it back to see the framing exactly as OBS outputs it.
• If you send OBS into a call app with Virtual Camera, start a test call or the app's camera preview and confirm the framed image appears there. Recent OBS versions let you choose what the virtual camera outputs, so make sure it is set to the scene or source you framed.

These checks confirm framing and sharpness inside OBS and that the call app receives the image. They don't test how the call service compresses video over your connection, or how it looks on the other person's screen. A test call with someone else is the only way to check that.

Limitations to keep in mind

• Digital zoom cannot add detail. The tighter you crop, the softer the image, and better lighting only partly compensates.
• There is no single safe zoom amount. How far you can crop before the image looks poor depends on your camera's resolution, the light and your output resolution, and no tested figures were available for this guide.
• Menu names and layouts can differ slightly between OBS versions and operating systems.
• Zooming in on the camera changes what of your physical background is visible. It does not replace or blur the background, which needs a separate effect or a different physical setup.