CoreMediaIO camera extension not available immediately after activation

are you saying if you run a AVCaptureDevice.DiscoverySession, you don't see your extension becoming available as a new AVCaptureDevice? That has not been my experience. Once the AVCaptureDevice has appeared, I can find and talk to its corresponding CMIO object.

Hi, have you got a solution? I meet the same problem

Hi, I have encountered the same issue. My host application has added the following listeners:

[[NSNotificationCenter defaultCenter] addObserver:self

                                         selector:@selector(updateCameraStatus:)
                                             name:AVCaptureDeviceWasConnectedNotification
                                           object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(updateCameraStatus:)
                                             name:AVCaptureDeviceWasDisconnectedNotification
                                           object:nil];

When my camera extension version is upgraded from 1.0.0 to 1.0.1, I first receive a deviceDisconnect notification. Through the OSSystemExtensionRequestDelegate method:

- (void)request:(OSSystemExtensionRequest *)request didFinishWithResult:(OSSystemExtensionRequestResult)result

I can confirm that result == OSSystemExtensionRequestCompleted.

However, at this point, I do not receive the deviceConnect notification, and the devices retrieved through AVCaptureDeviceDiscoverySession do not include my camera extension. My current macOS version is 14.5.

I also verified this through Photo Booth and confirmed that Photo Booth cannot automatically refresh the device list when the camera extension is updated. The app must be restarted to recognize the updated camera extension.

I would like to understand if this issue, which has persisted since July last year, has been resolved. Also, how have you been handling this issue? Thank you for your response!

If you need any further assistance or modifications, feel free to ask!

Like @superg and @KinWaver, my app has the same problem: it cannot see newly installed camera extensions without restarting the app.

I have resorted to using an NSTask and a command line utility that I can execute periodically to send custom parameters to my camera extension. Because the NSTask gets the list of devices each time it executes, it can see the recently added devices and communicate with them. But this solution is slow, and give that other pass (QuickTime Player, Photo Booth, etc.) can receive dynamic updates regarding cameras, I don't understand why my app can't do the same.

Any advice or other solutions would be greatly appreciated.

Hi, I have encountered the same issue. After active camera extension success! App cant get this new device by call CMIOObjectGetPropertyDataSize! My app in C++ program.