Live View Setup Issues

Live view is the real-time camera feed shown on the booth screen between captures, so guests can pose and frame themselves before the photo is taken. It is one of the most-asked-about features in support -- and one of the most fragile. Camera differences, mirror settings, aspect ratios, and CPU load all play a role. This article covers what live view does, how to set it up correctly, and what to do when it misbehaves.

Quick Diagnostics

If live view is not working as expected, check:

• The camera is physically connected and powered on.
• The camera is not open in another application (Windows Camera app, Zoom, OBS, etc.).
• Your workflow has a Live View step in the sequence (not just a capture step).
• You are running a supported camera type (Canon DSLR, Sony mirrorless, or webcam).

What Live View Is

When live view is enabled, the booth screen shows what the camera sees in real time. The guest can adjust their pose, smile, and framing, then the workflow countdown starts and a still photo is captured.

Without live view, guests just see a static screen or a "smile!" prompt and the camera fires blind. Live view is a guest experience feature, not a technical requirement -- the booth can capture photos perfectly well without it.

How Live View Works on Different Cameras

Camera type matters more than people expect:

• Canon DSLR: Live view streams from the camera in mirror-up mode. When the workflow captures the photo, the mirror flips down and the screen briefly goes black -- this is normal and unavoidable on Canon DSLRs. The live view resumes after the capture.
• Sony mirrorless and other mirrorless cameras: No mirror, so the live view stream stays continuous through the capture. There is no blackout.
• Webcam (USB or built-in): Live view stays on continuously. Image quality and color depth are lower than a DSLR but the feed is rock-steady.

Common Issues

Live View Is Black

Problem: You enable live view in the workflow, but the booth screen shows a black rectangle where the live feed should be.

Cause: Almost always one of three things: another app has claimed the camera, the camera is not properly connected, or live view is disabled in the workflow step.

Solution:

1. Close any other camera app. Windows Camera, Zoom, Teams, OBS, Skype, even browser tabs that requested camera permission can hold the camera open. Close them all and restart FMX.
2. Check the camera connection. Unplug the USB cable, wait a few seconds, and reconnect. For DSLRs, also confirm the camera is powered on and set to a mode that supports tethering (M, Av, Tv, or P -- not Auto on some Canon models).
3. Restart FMX after closing the conflicting apps so it can claim the camera fresh.
4. Check the workflow step. Open the workflow in the Cloud editor and confirm the Live View step is enabled and positioned before the capture.
5. Test in a different app (Windows Camera) to confirm the camera itself works. If it is black there too, the issue is with the camera or driver, not FMX.

Live View Is Mirrored (Backwards)

Problem: The live view shows the guest as a mirror image -- their right hand appears on the left side of the screen.

Cause: "Mirror Live View" is enabled. This is a deliberate setting because some booth designs (especially mirror-style booths) want the guest to see themselves as if looking into a mirror. For other booth styles, the mirroring feels wrong.

Solution:

1. In FMX, go to Global Settings > Camera Tab (see Camera Tab settings).
2. Find Mirror Live View and toggle it off.
3. Note: this only affects the live view preview, not the captured photo. The captured photo always saves in its real orientation. If you want the printed photo flipped too, that is a separate output setting.

Live View Looks Right but Photo Comes Out Mirrored (or Vice Versa)

Problem: What guests see in live view does not match what comes out in the final photo.

Cause: FMX has two separate mirror settings -- one for the live preview and one for the captured output. They can be set independently.

Solution: Decide what you want:

• Mirror booth style: mirror live view ON, mirror output OFF (guests see themselves like in a mirror, but the printed/saved photo is the real orientation).
• Photo booth style: mirror live view OFF, mirror output OFF (everything matches, no mirroring anywhere).

Set both toggles consistently in Global Settings > Camera Tab and test the workflow.

Live View Shows a Small Rectangle (Wrong Aspect Ratio)

Problem: The live feed appears tiny in the middle of the screen, surrounded by black bars.

Cause: The camera's native aspect ratio does not match the booth screen, and FMX is letterboxing rather than cropping.

Solution:

1. Check the camera's resolution and aspect ratio settings -- some Canon DSLRs default to a small live view feed. In the camera menu, set live view to its largest available size.
2. In FMX, check the workflow's display settings to confirm the live view fill mode (fit, fill, or stretch). "Fill" will crop to match the screen; "fit" will letterbox.
3. For mirror booths or large vertical screens, you may need to choose "fill" so the feed expands to the full screen, even though it crops the top and bottom of the camera feed.

Live View Drops Out During Capture (Then Comes Back)

Problem: Live view works fine until the moment of capture, when it freezes or goes black for a second.

Cause: This is normal behavior on Canon DSLR cameras (mirror flips), and also normal during AI-augmented workflows where the system is processing the captured image.

Solution: Nothing to fix -- this is expected. If guests find the blackout disruptive, the only real fix is switching to a mirrorless camera that does not have a physical mirror.

Flash Doesn't Fire When Live View Is Enabled

Problem: Captures work fine without live view, but turning on live view causes the flash to stop firing.

Cause: Some camera models cannot fire an external flash while in live view mode -- the mirror needs to be down for the flash sync to work. This is a camera firmware limitation, not an FMX bug.

Solution:

1. Check whether your specific camera model supports flash with live view enabled. Canon Rebel and some mid-range models do not.
2. If the camera does support it, enable Quick Mode or Phase-detect AF in the camera's live view menu so the mirror briefly drops for the flash sync.
3. If the camera cannot do both, choose between live view and flash. Many booths use continuous LED lighting instead of strobe flash so they can have both.

Live View Works but the Booth Is Slow / Lagging

Problem: Live view runs but the rest of FMX is sluggish -- buttons take a moment to respond, the workflow advances slowly, the booth feels overloaded.

Cause: Live view is CPU-intensive, especially at high resolutions. Older or low-spec booth PCs cannot always handle live view alongside other FMX features.

Solution:

1. Lower the live view resolution in the camera settings.
2. Disable any non-essential workflow features (heavy animations, AI overlays running simultaneously).
3. Close background apps on the booth PC (browsers, automatic updates, antivirus full scans).
4. If the booth PC is genuinely underpowered, consider disabling live view in workflows that do not need it. The booth will still capture and print -- guests just lose the preview feed.
5. For long-term fixes, upgrade the booth PC. FMX with live view runs comfortably on a modern Intel i5 / i7 with 16 GB RAM; older Atom-based machines can struggle.

Related Articles

• Camera Tab Settings
• Camera Setup
• Choosing a Camera
• Supported Cameras List
• Camera Troubleshooting
• Overlay Customization Issues
• Common Issues & Solutions