I am seeing a crash on iOS 18.0 in my app due to PHImageManager.default().requestImage. Same crash is seen even while using requestImageDataAndOrientation.
Not sure why this is happening only on iOS 18.0.
Any help on this would be appreciated.
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000010
Exception Codes: 0x0000000000000001, 0x0000000000000010
VM Region Info: 0x10 is not in any region. Bytes before following region: 4310777840
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
UNUSED SPACE AT START
--->
Termination Reason: SIGNAL 11 Segmentation fault: 11
Terminating Process: exc handler [695]
Triggered by Thread: 14
Thread 14 name: Dispatch queue: */file=33) .Generic
Thread 14 Crashed:
0 libobjc.A.dylib 0x1944d7020 objc_msgSend + 32
1 PhotoLibraryServices 0x1b080262c +[PLUniformTypeIdentifier utiWithCompactRepresentation:conformanceHint:] + 40
2 Photos 0x1b0081354 _resourceInfoFromResultDict + 1048
3 Photos 0x1b0080a7c fetchResourcesForChoosing + 584
4 Photos 0x1b0080714 ___fetchNonHintResources_block_invoke.227 + 152
5 PhotoLibraryServices 0x1b026b3c4 __53-[PLManagedObjectContext _directPerformBlockAndWait:]_block_invoke + 48
6 CoreData 0x19f171b00 developerSubmittedBlockToNSManagedObjectContextPerform + 228
7 libdispatch.dylib 0x19eeff584 _dispatch_client_callout + 16
8 libdispatch.dylib 0x19eef5728 _dispatch_lane_barrier_sync_invoke_and_complete + 56
9 CoreData 0x19f1c2a0c -[NSManagedObjectContext performBlockAndWait:] + 308
10 PhotoLibraryServices 0x1b026cea4 -[PLManagedObjectContext _directPerformBlockAndWait:] + 144
11 PhotoLibraryServices 0x1b026cdf8 -[PLManagedObjectContext performBlockAndWait:] + 196
12 Photos 0x1b00804a4 _fetchNonHintResources + 292
13 Photos 0x1afeedb38 PHChooserListContinueEnumerating + 144
14 Photos 0x1afeed9f8 -[PHImageResourceChooser presentNextQualifyingResource] + 412
15 Photos 0x1afeed1d0 -[PHImageRequest startRequest] + 2424
16 libdispatch.dylib 0x19eee5aac _dispatch_call_block_and_release + 32
17 libdispatch.dylib 0x19eeff584 _dispatch_client_callout + 16
18 libdispatch.dylib 0x19eeee2d0 _dispatch_lane_serial_drain + 740
19 libdispatch.dylib 0x19eeeede0 _dispatch_lane_invoke + 440
20 libdispatch.dylib 0x19eef91dc _dispatch_root_queue_drain_deferred_wlh + 292
21 libdispatch.dylib 0x19eef8a60 _dispatch_workloop_worker_thread + 540
22 libsystem_pthread.dylib 0x2214d5660 _pthread_wqthread + 292
23 libsystem_pthread.dylib 0x2214d29f8 start_wqthread + 8
Photos & Camera
RSS for tagExplore technical aspects of capturing high-quality photos and videos, including exposure control, focus modes, and RAW capture options.
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We observed that the PHPicker is unable to load RAW images captured on an iPhone in some scenarios. And it is also somehow related to iCloud.
Here is the setup:
The PHPickerViewController is configured with preferredAssetRepresentationMode = .current to avoid transcoding.
The image is loaded from the item provider like this:
if itemProvider.hasItemConformingToTypeIdentifier(kUTTypeImage) {
itemProvider.loadFileRepresentation(forTypeIdentifier: kUTTypeImage) { url, error in
// work
}
}
This usually works, also for RAW images. However, when trying to load a RAW image that has just been captured with the iPhone, the loading fails with the following errors on the console:
[claims] 43A5D3B2-84CD-488D-B9E4-19F9ED5F39EB grantAccessClaim reply is an error: Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x2804a8e70 {Error Domain=NSCocoaErrorDomain Code=4097 "connection from pid 19420 on anonymousListener or serviceListener" UserInfo={NSDebugDescription=connection from pid 19420 on anonymousListener or serviceListener}}}
Error copying file type public.image. Error: Error Domain=NSItemProviderErrorDomain Code=-1000 "Cannot load representation of type public.image" UserInfo={NSLocalizedDescription=Cannot load representation of type public.image, NSUnderlyingError=0x280480540 {Error Domain=NSCocoaErrorDomain Code=4097 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x2804a8e70 {Error Domain=NSCocoaErrorDomain Code=4097 "connection from pid 19420 on anonymousListener or serviceListener" UserInfo={NSDebugDescription=connection from pid 19420 on anonymousListener or serviceListener}}}}}
We observed that on some devices, loading the image will actually work after a short time (~30 sec), but on others it will always fail.
We think it is related to iCloud Photos: On the device that has iCloud Photos sync enabled, the picker is able to load the image right after it was synced to the cloud. On devices that don't sync the image, loading always fails. It seems that the sync process is doing some processing (?) of the image that will later enable the picker to load it successfully, but that's just guessing.
Additional observations:
This seems to only occur for images that were taken with the stock Camera app. When using Halide to capture RAW (either ProRAW or RAW), the Picker is able to load the image.
When trying to load the image as kUTTypeRawImage instead of kUTTypeImage, it also fails.
The picker also can't load RAW images that were AirDroped from another device, unless it synced to iCloud first.
This is reproducable using the Selecting Photos and Videos in iOS sample code project.
We observed this happening in other apps that use the PHPicker, not just ours.
Is this a bug, or is there something that we are missing?
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
Photos and Imaging
wwdc2022-10023
Hi,
I would like to use macro-mode for the custom camera using AVCaptureDevice in my project. This feature might help to automatically adjust and switch between lenses to get a close up clear image. It looks like this feature is not available and there are no open apis to achieve macro mode from Apple. Is there a way to get this functionality in the custom camera without losing the image quality. Please let me know if this is possible.
Thanks you,
Adil Thamarasseri
when I get results from picker: PHPickerViewController, didFinishPicking results: [PHPickerResult])
and I load the image using itemProvider .loadFileRepresentation (the itemProvider is the NSItemProvider provided by the PHPickerResult)
will the url that's returned by this method be guaranteed to have the file extension ie, "file://image.jpeg" not "file://image"
I want to know if i need to just check the extension to know its file type.
(FYI in case this makes a difference, im only interested in user screenshots and screenrecordings)
Hi guys,
How to achieve the following feature on macOS when a USB device (Camera/Mic/Speaker) is connected:
When a third-party video conferencing app is not in a meeting, ensure the app defaults to using the USB device (Camera/Mic/Speaker).
When a third-party conferencing app is in a meeting, ensure the app automatically switches to the USB device (Camera/Mic/Speaker).
I want to make use of IOKit extension to hidden or ignore build-in camera to realize the requirement.
however the extension can't be loaded for Invalid permissions in MacOS 15.4.1, buildVersion:24E263. I also tried to run in in MacOS 14.4.1, which can be loaded but can't auto load when restart laptop as KDK version not match.
Could you please give me some suggestion? Is it possible hidden build-in camera in MacOS M-series chip? Is there any other method to realize the feature. Thanks a lot.
Where can I find the documentation of the Genlock feature of the iPhone 17 Pro? How does it work and how can I use it in my app?
I'm getting an error writing a ciImage as a heif image:
// Create CIImage directly from pixel buffer
let ciImage = CIImage(cvPixelBuffer: pixelBuffer, options: [CIImageOption.properties: combinedMetadata])
// Write HEIC synchronously
do {
try ciContext.writeHEIFRepresentation(of: ciImage, to: url, format: .RGBA8, colorSpace: colorSpace)
The error I'm getting is:
Error Domain=CINonLocalizedDescriptionKey Code=3 "(null)" UserInfo={CINonLocalizedDescriptionKey=failed to write HEIC data to file., NSUnderlyingError=0x11b1a1ec0 {Error Domain=CINonLocalizedDescriptionKey Code=10 "(null)" UserInfo={CINonLocalizedDescriptionKey=failed to add image to the PhotoCompressionSession.}}}
Both
try ciContext.writeJPEGRepresentation(of: copiedCIImage, to: url, colorSpace: colorSpace, options: options)
and
try ciContext.writePNGRepresentation(of: copiedCIImage, to: url, format: .RGBA8, colorSpace: colorSpace)
work. I also verified that the code works with iOS 18.
Is there something new we need to do for Heif images?
Thanks in advance
iPhone7 : iOS 14.0 Beta 5
Xcode-beta
Mac OS : 10.15.5 (19F101)
crash info :
** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[PHPhotoLibrary presentLimitedLibraryPickerFromViewController:]: unrecognized selector sent to instance xxxxxx'
terminating with uncaught exception of type NSException
my code:
(void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
if (@available(iOS 14, *)) {
[[PHPhotoLibrary sharedPhotoLibrary] presentLimitedLibraryPickerFromViewController:self];
}
}
So I've spent the last five years optimizing my video AI system so that it runs with less than 5% CPU while processing a 30fps video feed on a Macbook Pro M2, and everything is great, until Sonoma comes out, and I find myself consuming 40% CPU for the exact same workload.
So I fire up Instruments, and the "heaviest stack trace" (see screenshot) turns out to be Espresso doing some completely unasked-for and absolutely useless processing on my video frames. I turn off Reactions, but nothing helps - the CPU consumptions stays at 40%.
"Reactions" is nothing but a useless toy to please some WWDC keynote fanboys, I don't want it anywhere near my app or my users, and I especially do not want to take the blame for it pissing away the user's CPU cycles and battery.
Now, how do I make it go away, for ever?
Best regards
Jacob