Can you record dual camera video during a FaceTime or video call?
Not at the same time as the call. A video call — FaceTime, or any of the meeting apps — is already using the camera the whole time it is running, and iOS lets one app control the cameras at a time. A separate dual-camera recorder cannot open the front and back cameras while another app is holding them, so the two cannot run together in the way people usually imagine.
That sounds like a limitation until you look at what it is protecting. The reason a call and a recorder cannot share the cameras is the same reason your call does not randomly lose its picture: whichever app has the cameras has them exclusively. The rest of this explains the mechanism, what happens if a call arrives while you are already recording, and how to get the thing you were actually after.
Why two apps cannot share the cameras
A camera is a single physical device, and only one app can be driving it at any given moment. When a video call is active, that call app has claimed the camera it is using and is feeding your live picture to the other side. There is no spare copy of the camera for a second app to open at the same time.
Dual-camera recording makes this stricter, not looser. A simultaneous front-and-back session does not use one abstract camera — it connects to specific physical camera devices, one per input, because that is what the multi-camera capability check operates on. So it needs those exact devices to be free. If a call is already holding the front camera to show your face, a dual-camera app cannot also take the front camera for its own session; the device is spoken for.
What happens if a call starts while you are already recording
The order does not change the outcome, only who gets interrupted. If you are part way through a dual recording and an incoming call is answered, the call takes the camera it needs, and your recording loses the input it was running on. A dual-camera session cannot keep compositing two live streams when one of those streams has been pulled out from under it.
The thing that matters here is how that interruption is handled. A recording that stops abruptly is only a problem if it leaves you a broken file. DualCam treats a camera being taken by another app the same way it treats an incoming phone call, overheating, or a full disk: it stops the recording and closes the file properly, so what you had up to that moment is a finished, playable video rather than a corrupt one. You lose the rest of the take, not the take.
If you know a call might land during something you cannot reshoot, the same advice applies as for phone calls generally — a Focus mode that silences interruptions keeps the camera from being yanked away mid-recording in the first place.
What people are usually actually trying to do
The question almost always comes from one of two goals, and separating them makes the answer obvious. Either you want to capture the call itself — both faces, the conversation as it happened — or you want your own reaction and surroundings while a call is going on, with the call being incidental.
Capturing the call itself
If the goal is to keep a record of the call — the other person on screen and you together — a dual-camera recorder is the wrong tool, because the other person is not one of your two cameras. They are a video stream arriving over the network and being drawn on your screen by the call app. The way to capture that is to record the screen, which grabs whatever the call is showing, both sides included. The iOS screen recorder does this, with the usual caveats: it captures the call app’s interface along with the picture, and the recording quality follows the call, not your cameras.
Capturing your side while a call happens
If instead you want a two-camera shot of yourself and what is around you — a reaction, a vlog moment, your face plus the room — and the call is just something happening at the same time, the clean answer is to record that as its own take rather than during the call. A dual-camera recording of your reaction, shot right after you hang up while the moment is fresh, gives you a proper composited file with both cameras, and it does not have to fight the call for the hardware.
If you genuinely need both at once
When the recording and the live call truly have to happen in the same moment, the reliable route is a second device. One phone runs the call; the other runs the dual-camera recording, pointed at you and your surroundings. Each device owns its own cameras, so nothing is being contested, and you end up with a clean two-camera file that was never at the mercy of the call app taking over.
It is more setup than a single phone, but it is the only arrangement where a live call and a real dual-camera recording are not competing for the same hardware — and it sidesteps the interruption entirely, because the recording device is not the one on the call.
Where DualCam fits
DualCam records the iPhone’s front and back cameras at the same time into one MP4, which is exactly the reaction-and-surroundings shot described above — best captured as its own take, not layered onto a live call it would have to wrestle for the cameras. If a call does interrupt a recording, it closes the file cleanly so you keep what you already shot. It does not record other apps’ video calls, because those are screen content rather than your cameras, and screen recording is the tool for that job.
Common follow-up questions
Can I run a dual-camera app in the background during a FaceTime call?
No. A video call is using the camera the whole time, and iOS gives camera control to one app at a time, so a dual-camera recorder cannot open the cameras while the call holds them. Backgrounding the recorder does not help — the recorder is not the app with the cameras.
If a call comes in while I am recording, do I lose the whole video?
No. DualCam stops the recording when a call takes the camera and closes the file properly, so everything up to that moment is a finished, playable video. You lose the rest of the take, not what you had already recorded.
How do I record a video call with both people on screen?
Record the screen, not the cameras. The other person is a video stream drawn on your display by the call app, not one of your iPhone’s cameras, so the iOS screen recorder is what captures both sides — with the call app’s interface included and the quality following the call.
Can I record my reaction with two cameras and be on a call at the same time on one phone?
Not on one phone, because the call and the dual-camera session both need the cameras and only one app can hold them. Use a second device for the recording, or record your reaction as a separate take right after the call.
Want to just do this?
DualCam records the iPhone front and back cameras at the same time and writes one finished MP4 while you shoot. Free, no account, no ads, nothing leaves the phone.