This bug is driving me mad. I'm trying to produce the absolute minimal code to get AVDepthData from an iPhone 7+ using its DualCam.
I have this code:
//
// RecorderViewController.swift
// ios-recorder-app
import UIKit
import AVFoundation
class RecorderViewController: UIViewController {
@IBOutlet weak var previewView: UIView!
@IBAction func onTapTakePhoto(_ sender: Any) {
guard let capturePhotoOutput = self.capturePhotoOutput else { return }
let photoSettings = AVCapturePhotoSettings()
photoSettings.isDepthDataDeliveryEnabled = true //Error
capturePhotoOutput.capturePhoto(with: photoSettings, delegate: self)
}
var session: AVCaptureSession?
var videoPreviewLayer: AVCaptureVideoPreviewLayer?
var capturePhotoOutput: AVCapturePhotoOutput?
override func viewDidLoad() {
super.viewDidLoad()
AVCaptureDevice.requestAccess(for: .video, completionHandler: { _ in })
let captureDevice = AVCaptureDevice.default(.builtInDualCamera, for: .depthData, position: .back)
do {
print(captureDevice!)
let input = try AVCaptureDeviceInput(device: captureDevice!)
self.capturePhotoOutput = AVCapturePhotoOutput()
self.capturePhotoOutput?.isDepthDataDeliveryEnabled = true //Error
self.session = AVCaptureSession()
self.session?.addInput(input)
self.videoPreviewLayer = AVCaptureVideoPreviewLayer(session: self.session!)
self.videoPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
self.videoPreviewLayer?.frame = view.layer.bounds
previewView.layer.addSublayer(self.videoPreviewLayer!)
self.session?.addOutput(self.capturePhotoOutput!)
self.session?.startRunning()
} catch {
print(error)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension RecorderViewController : AVCapturePhotoCaptureDelegate {
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
print(photo.depthData)
}
}
If I comment out the lines that are marked with "Error" the code works as I would expect, and prints nil for depthData.
However, leaving the lines as they are, I get an exception. The error message states: AVCapturePhotoOutput setDepthDataDeliveryEnabled:] Depth data delivery is not supported in the current configuration.
How do I change the "current configuration" so that depth delivery is supported?
I've watched this video: https://developer.apple.com/videos/play/wwdc2017/507/ which was helpful, and I believe I've followed the exact steps required to make this work.
Any tips would be gratefully received!
There are two things that I needed to fix.
sessionPreset to a format that supports depth, such as .photo..isDepthDataDeliveryEnabled = true.Here is my minimal code for getting depth with photos:
//
// RecorderViewController.swift
// ios-recorder-app
//
import UIKit
import AVFoundation
class RecorderViewController: UIViewController {
@IBOutlet weak var previewView: UIView!
@IBAction func onTapTakePhoto(_ sender: Any) {
guard var capturePhotoOutput = self.capturePhotoOutput else { return }
var photoSettings = AVCapturePhotoSettings()
photoSettings.isDepthDataDeliveryEnabled = true
capturePhotoOutput.capturePhoto(with: photoSettings, delegate: self)
}
var session: AVCaptureSession?
var videoPreviewLayer: AVCaptureVideoPreviewLayer?
var capturePhotoOutput: AVCapturePhotoOutput?
override func viewDidLoad() {
super.viewDidLoad()
AVCaptureDevice.requestAccess(for: .video, completionHandler: { _ in })
let captureDevice = AVCaptureDevice.default(.builtInDualCamera, for: .video, position: .back)
print(captureDevice!.activeDepthDataFormat)
do{
let input = try AVCaptureDeviceInput(device: captureDevice!)
self.capturePhotoOutput = AVCapturePhotoOutput()
self.session = AVCaptureSession()
self.session?.beginConfiguration()
self.session?.sessionPreset = .photo
self.session?.addInput(input)
self.videoPreviewLayer = AVCaptureVideoPreviewLayer(session: self.session!)
self.videoPreviewLayer?.videoGravity = AVLayerVideoGravity.resizeAspectFill
self.videoPreviewLayer?.frame = self.view.layer.bounds
self.previewView.layer.addSublayer(self.videoPreviewLayer!)
self.session?.addOutput(self.capturePhotoOutput!)
self.session?.commitConfiguration()
self.capturePhotoOutput?.isDepthDataDeliveryEnabled = true
self.session?.startRunning()
}
catch{
print(error)
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
extension RecorderViewController : AVCapturePhotoCaptureDelegate {
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
print(photo.depthData)
}
}