Adding a live camera feed to Keynote presentations allows you to place the speaker's video directly as a slide object. This feature lets you position a Mac's built-in camera, external video inputs connected via cable, or the front and rear cameras of an iPad and iPhone directly onto a slide. The added live video object can be resized, masked, and customized with background options tailored to your slide design.
Requirements and source rules for adding a live camera
Before adding live video, you need to understand the operating conditions of your presentation hardware. On Mac, the built-in camera is used as the default source. If you want to use an external digital camera or mirror an iPhone or iPad screen as a live video source, Apple guides state that these external devices must be connected to the Mac with a cable.
On iPad and iPhone devices, the built-in front and rear cameras can be assigned directly as sources without the need for an external wired device.
There is a critical limitation in multi-presenter slideshows featuring multiple speakers: only cameras and devices connected to the host's computer or device can be broadcast as a live video source.
Steps to add a live video source on Mac
Follow these steps to add a camera feed to a slide on your Mac computer:
- Open the Keynote application on your Mac and load the relevant presentation.
- If you are going to use an iPhone, iPad, or external digital camera as a source, connect the device to your Mac using a cable.
- Click the Media icon in the toolbar and select the Add Live Video option from the menu. The live feed from your Mac's built-in camera will appear on the slide.
- To set an external camera or a connected mobile device as the source, select the live video on the slide. Go to the Live Video tab in the Format sidebar on the right side, click the Source button, and press the plus (+) icon.
- Select your desired source from the menu at the bottom of the window that opens. If you wish, change the name and thumbnail of the source, then click the Add button.
For source management and further details on Mac, you can follow the instructions in the official Add live video in Keynote on Mac guide.
Adding a camera and switching sources on iPad and iPhone
In the Keynote interface running on iPadOS and iOS, the live video steps are arranged around touch controls:
- Open the Keynote app and your presentation on your iPad or iPhone device.
- Tap the Insert icon in the toolbar and select the Add Live Video option. By default, the device's front camera is placed on the slide.
- To change the source to the rear camera or an alternative source, tap the live video box on the slide, press the Format (brush) icon, and open the Live Video tab.
- Tap the Source button, then press the plus (+) icon.
- Give the new source a name, tap the switch camera icon to toggle between the front and rear cameras, edit the thumbnail if necessary, and tap the Add button in the top right.
For these mobile configuration details, you can consult Apple's Add live video in Keynote on iPad and Add live video in Keynote on iPhone documentation.
Masking, scaling, and corner radius controls for the video box
The live video frame added to the slide can be styled using the tools in the Format menu:
- Scale: Drag the Scale slider to the right (zoom in) or left (zoom out) to adjust the camera's zoom level.
- Mask: Choose any shape or size from the Mask menu to fit the outer boundaries of the live video into circular or different geometric forms.
- Corner Radius: Increase the value in the box to round the corners of a rectangular live video, or decrease it to make them sharper.
If you want to reposition the live camera frame and slide elements with smooth animations when transitioning between slides, you can apply the motion effects described in the Keynote magic move guide.
Background fill and opacity settings
To adjust the area behind the live video or its frame fill, select the object and enable the Background option in the Format > Live Video tab:
- Transparent Background: Select the No Fill option from the drop-down menu to remove the background.
- Theme Color or Custom Color: You can assign a color from the theme palette or select a custom hue from the Color Wheel. In the Mac interface, you can adjust brightness and saturation using the Opacity and HDR Boost sliders.
- Color Matching with Eyedropper: You can use the eyedropper color picker tool to sample an existing color on the slide exactly.
- Gradient: You can determine the direction and angle using two-color gradient or advanced gradient options.
- Image Fill: You can assign a photo to the background using the Image option; set its placement using the Original Size, Stretch, Scale to Fill, or Scale to Fit options.
Playing, pausing, and preview controls for live video
The live video feed only plays during the presentation while the slide containing that object is on screen; the feed pauses once you navigate away from the slide. It is possible to manage the feed during the presentation or while preparing:
- When the Presentation Is Not Playing: You can turn the camera on or off by tapping the live video object and using the Manage Previews option in the Format > Live Video tab, or by navigating to View > Show Live Video Preview from the Mac menu.
- During a Full-Screen Presentation: On Mac, move the pointer to the bottom of the screen to bring up the toolbar, where you can instantly toggle the live video source on or off using the video controls.
When your presentation is over, if you want to turn the entire session or slide sequence into a video file, you can consult our guide titled Keynote record presentation with video.
Example scenario: Multi-camera live product demo
In this hypothetical scenario, a 3-slide presentation sequence is planned where an instructor introduces a new laboratory device:
- Slide 1 (Opening): Front camera masked in a circle in the bottom-right corner (speaker's face), with title and agenda items on the left side.
- Slide 2 (Device Inspection): Close-up live video feed from an external digital camera connected to the Mac via cable on the left side (prototype on the desk), with technical parameters on the right side.
- Slide 3 (Closing and Q&A): Speaker camera in the center softened with a large corner radius, and contact links underneath.
In this arrangement, camera sources activate depending on what the slide needs to accomplish, providing attendees with a smooth visual experience.
Troubleshooting and common issues
- Camera feed remains black or does not appear: Check whether the Keynote application has Camera access permission in Mac or iPadOS system settings. For external cameras, verify the cable connection and ensure the device is powered on.
- External camera is not listed in the Source menu: Make sure external digital cameras or video capture cards are recognized by the system as a UVC/webcam-compliant video input device. According to Apple documentation, external devices must be physically connected to the Mac with a cable.
- Other presenter's camera is not visible in a multi-presenter session: By Keynote rules, in multi-presenter presentations, only cameras connected to the host computer can be broadcast as a live video object. Co-presenters' cameras cannot be streamed directly into a Keynote slide object.
Final checklist before a live presentation
- Physically check the cable connections of external cameras and devices to the Mac.
- Verify framing and lighting in Keynote based on their position on the slide using the Manage Previews tool.
- Review slide text and graphics to ensure they are not covered by the live video window.
- Confirm that external recording or communication software that could monopolize the camera in the background during the presentation does not create conflicts.
Does live video run continuously throughout the presentation?
No. In Keynote, the live video object runs only while the slide it was added to is displayed on screen. When transitioning to a slide without live video, the camera feed stops.
Can multiple camera sources be used in the same presentation?
Yes. You can define multiple cameras from the Source section under the Format panel and choose between these sources on the same slide or across different slides.
Can the live video background be made completely transparent?
Yes. After enabling Background under the Live Video tab in the Format panel, the background can be left transparent by selecting No Fill from the Fill menu.
← Back to blog
