[BUG] Using MediaElement in iOS causes crash

[homerokzam]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

When invoking _speechToText.StartListenAsync(CultureInfo.CurrentCulture, CancellationToken.None);, the application throws an Objective-C exception with the following details:

Objective-C exception thrown. Name: com.apple.coreaudio.avfaudio
Reason: required condition is false: IsFormatSampleRateAndChannelCountValid(format)

Error:
Objective-C exception thrown. Name: com.apple.coreaudio.avfaudio Reason: required condition is false: IsFormatSampleRateAndChannelCountValid(format)
Native stack trace:
0 CoreFoundation 0x00000001804b910c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x0000000180092da8 objc_exception_throw + 72
2 CoreFoundation 0x00000001804b901c -[NSException initWithCoder:] + 0
3 AVFAudio 0x00000001cd0b0f6c _ZN17AUGraphNodeBaseV318CreateRecordingTapEmjP13AVAudioFormatU13block_pointerFvP16AVAudioPCMBufferP11AVAudioTimeE + 748
4 AVFAudio 0x00000001cd14ba64 _ZN17AVAudioEngineImpl16InstallTapOnNodeEP11AVAudioNodemjP13AVAudioFormatU13block_pointerFvP16AVAudioPCMBufferP11AVAudioTimeE + 1120
5 AVFAudio 0x00000001cd12b220 -[AVAudioNode installTapOnBus:bufferSize:format:block:] + 560
6 libxamarin-dotnet-debug.dylib 0x00000001055bac3c xamarin_dyn_objc_msgSend + 160
7 KSpeackEnglish 0x00000001040b589c interp_to_native_trampoline + 172
8 libmonosgen-2.0.dylib 0x00000001059405a4 ves_pinvoke_method + 584
9 libmonosgen-2.0.dylib 0x0000000105934614 mono_interp_exec_method + 3072
10 libmonosgen-2.0.dylib 0x0000000105931f80 interp_runtime_invoke + 244
11 libmonosgen-2.0.dylib 0x00000001058451fc mono_jit_runtime_invoke + 1064
12 libmonosgen-2.0.dylib 0x0000000105a15700 mono_runtime_try_invoke + 156
13 libmonosgen-2.0.dylib 0x0000000105a18774 mono_runtime_invoke + 488
14 KSpeackEnglish 0x00000001040d77c4 _ZL30native_to_managed_trampoline_9P11objc_objectP13objc_selectorPP11_MonoMethodj + 316
15 KSpeackEnglish 0x00000001040d80e4 -[__MonoMac_NSAsyncSynchronizationContextDispatcher xamarinApplySelector] + 44
16 Foundation 0x0000000180f465ec __NSThreadPerformPerform + 124
17 CoreFoundation 0x000000018041d294 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 24
18 CoreFoundation 0x000000018041d1dc __CFRunLoopDoSource0 + 172
19 CoreFoundation 0x000000018041c940 __CFRunLoopDoSources0 + 232
20 CoreFoundation 0x0000000180416e84 __CFRunLoopRun + 788
21 CoreFoundation 0x00000001804166f4 CFRunLoopRunSpecific + 552
22 GraphicsServices 0x00000001905e5b10 GSEventRunModal + 160
23 UIKitCore 0x0000000185b319dc -[UIApplication _run] + 796
24 UIKitCore 0x0000000185b35bd4 UIApplicationMain + 124
25 libxamarin-dotnet-debug.dylib 0x0000000105579288 xamarin_UIApplicationMain + 60
26 libmonosgen-2.0.dylib 0x0000000105941a0c do_icall + 316
27 libmonosgen-2.0.dylib 0x0000000105940208 do_icall_wrapper + 356
28 libmonosgen-2.0.dylib 0x000000010593445c mono_interp_exec_method + 2632
29 libmonosgen-2.0.dylib 0x0000000105931f80 interp_runtime_invoke + 244
30 libmonosgen-2.0.dylib 0x00000001058451fc mono_jit_runtime_invoke + 1064
31 libmonosgen-2.0.dylib 0x0000000105a146ec mono_runtime_invoke_checked + 148
32 libmonosgen-2.0.dylib 0x0000000105a1be88 mono_runtime_exec_main_checked + 116
33 libmonosgen-2.0.dylib 0x000000010589abf0 mono_jit_exec + 364
34 libxamarin-dotnet-debug.dylib 0x00000001055b9bac xamarin_main + 2312
35 KSpeackEnglish 0x0000000104182d50 main + 64
36 dyld 0x00000001050b1410 start_sim + 20
37 ??? 0x0000000104df2274 0x0 + 4376699508

Expected Behavior

The expected behavior is for _speechToText.StartListenAsync to initiate the speech recognition process without encountering exceptions, allowing the application to transcribe spoken words into text seamlessly.

Steps To Reproduce

1. Implement the HandleOnClickedStartListening method as follows:
   private async void HandleOnClickedStartListening()
   {
   try
   {
   var isGranted = await _speechToText.RequestPermissions(CancellationToken.None);
   if (!isGranted)
   {
   await Toast.Make("Permission not granted").Show(CancellationToken.None);
   return;
   }

    _speechToText.RecognitionResultUpdated += OnRecognitionTextUpdated;
    _speechToText.RecognitionResultCompleted += OnRecognitionTextCompleted;
    await _speechToText.StartListenAsync(CultureInfo.CurrentCulture, CancellationToken.None);
   

   }
   catch (Exception ex)
   {
   Console.WriteLine(ex.Message);
   await Toast.Make(ex.Message).Show(CancellationToken.None);
   }
   }

2. Execute the application on an iOS device or simulator.

3. Trigger the HandleOnClickedStartListening method to start speech recognition.

4. Observe the application throwing the aforementioned Objective-C exception.

Link to public reproduction project repository

https://github.com/homerokzam/SpeechToText

Environment

- .NET MAUI CommunityToolkit: 10.0.0
- OS: macOS Sequoia 15.2
- .NET MAUI: 9.0.21

Anything else?

No response