Inputs are not always deleted when switching from front to back camera

[Maxime Charruel]

Hi,
I have an issue returning the famous :

Multiple audio/video AVCaptureInputs are not currently supported

The issue is in the method when I switch to front / back many times, reinit the camera, reswitch etc.:

fileprivate func updateCameraDevice( deviceType: CameraDevice)

I replaced :

for input in inputs {

            if let deviceInput = input as? AVCaptureDeviceInput {

                if deviceInput.device == backCameraDevice && cameraDevice == .front {

                    validCaptureSession.removeInput(deviceInput)
                    break;
                } else if deviceInput.device == frontCameraDevice && cameraDevice == .back {
                    validCaptureSession.removeInput(deviceInput)
                    break;
                }
            }
        }

by :

for input in inputs {
            if let deviceInput = input as? AVCaptureDeviceInput {
                validCaptureSession.removeInput(deviceInput)
            }
        }

And It works now, I do not have the issue anymore.
It seems that sometimes it doesn't pass in the "if" and "else if" and do not remove anything, then I add a second input and it crash.
I know my solution is not good but it prevents the crash for now.

Does anyone encounter this issue ?

[Jean Duhard]

Hi,
My users had the same issue, but I can't reproduce it ...

[Ricardo Torrão]

@Aximem

fixed in v3.1.4 👍

[pablogupi]

HI! this issue has reappeared, in version 5.1.3 :

Fatal Exception: NSInvalidArgumentException
0 CoreFoundation 0x1b952ea48 __exceptionPreprocess
1 libobjc.A.dylib 0x1b9255fa4 objc_exception_throw
2 AVFoundation 0x1c360bb00 -[AVCaptureSession addInput:]
3 CameraManager 0x104bc2fb4 CameraManager.setupOutputMode(:oldCameraOutputMode:) + 1613 (CameraManager.swift:1613)
4 CameraManager 0x104bd04a4 partial apply for closure #1 in CameraManager.setupCamera(:) + 1634 (CameraManager.swift:1634)
5 CameraManager 0x104bbc65c thunk for @escaping @callee_guaranteed () -> () ()
6 libdispatch.dylib 0x1b91fa610 _dispatch_call_block_and_release
7 libdispatch.dylib 0x1b91fb184 _dispatch_client_callout
8 libdispatch.dylib 0x1b91a7404 _dispatch_lane_serial_drain$VARIANT$mp
9 libdispatch.dylib 0x1b91a7df8 _dispatch_lane_invoke$VARIANT$mp
10 libdispatch.dylib 0x1b91b1314 _dispatch_workloop_worker_thread
11 libsystem_pthread.dylib 0x1b924ab88 _pthread_wqthread
12 libsystem_pthread.dylib 0x1b924d760 start_wqthread