How do I start a camera session?

To start a camera session, you can follow these steps as outlined in the session "Build compelling spatial photo and video experiences":

1. Create an AV capture session: This will coordinate the data flow between the input and output components.
2. Create an AV capture device: Set it to the default system preferred camera.
3. Add an input to the session: This represents input from a capture device like a camera.
4. Add an output to the session: This manages the output and writes it to disk.
5. Commit the configuration: Finalize the setup.
6. Start running the session: Begin the capture process.

Here is a code snippet to illustrate these steps:

let captureSession = AVCaptureSession()
guard let captureDevice = AVCaptureDevice.default(for: .video) else { return }
let input = try AVCaptureDeviceInput(device: captureDevice)
captureSession.addInput(input)

let output = AVCaptureMovieFileOutput()
captureSession.addOutput(output)

captureSession.commitConfiguration()
captureSession.startRunning()

For more detailed information, you can refer to the session Build compelling spatial photo and video experiences at the timestamp 05:21.

Additionally, if you are working on a lock screen camera capture experience, you can refer to the session Build a great Lock Screen camera capture experience at the timestamp 11:33, which discusses setting up a camera viewfinder and shutter button for a quick capture experience.