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[camera_avfoundation] Use of improperly initialised _lastVideoSampleTime in captureOutput #132014

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flutter/packages
#6897
Closed
[camera_avfoundation] Use of improperly initialised _lastVideoSampleTime in captureOutput#132014
flutter/packages
#6897
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hellohuanlin
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⏳Bot is counting down the days until it unassigns the issueP2Important issues not at the top of the work listc: fatal crashCrashes that terminate the processfound in release: 3.10Found to occur in 3.10found in release: 3.13Found to occur in 3.13has reproducible stepsThe issue has been confirmed reproducible and is ready to work onp: cameraThe camera pluginpackageflutter/packages repository. See also p: labels.platform-iosiOS applications specificallyr: fixedIssue is closed as already fixed in a newer versionteam-iosOwned by iOS platform teamtriaged-iosTriaged by iOS platform team

Description

@misos1
misos1
opened on Aug 6, 2023

Is there an existing issue for this?

Steps to reproduce

Run test code.

Expected results

No crash.

Actual results

Property _lastVideoSampleTime (and also _lastAudioSampleTime) may be improperly initialised when used in CMTimeSubtract which can lead to this exception:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AVAssetWriterInputPixelBufferAdaptor appendPixelBuffer:withPresentationTime:] invalid parameter not satisfying: CMTIME_IS_NUMERIC(presentationTime)'
libc++abi: terminating with uncaught exception of type NSException
* thread #9, queue = 'io.flutter.camera.captureSessionQueue', stop reason = signal SIGABRT

Code sample

Code sample 
import "dart:io";
import "package:flutter/material.dart";
import "package:camera/camera.dart";

void main() {
	runApp(const MyApp());
}

class MyApp extends StatelessWidget {
	const MyApp({super.key});
	@override Widget build(BuildContext context) => const MaterialApp(home: MyHomePage());
}

class MyHomePage extends StatefulWidget {
	const MyHomePage({super.key});
	@override State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
	bool loading = true;
	int counter = 0;
	late CameraController camera_cont;

	@override void dispose() {
		camera_cont.dispose();
		super.dispose();
	}

	@override void initState() {
		super.initState();
		init_camera();
	}

	init_camera() async {
		final cameras = await availableCameras();
		camera_cont = CameraController(cameras.firstWhere((camera) => camera.lensDirection == CameraLensDirection.back), ResolutionPreset.ultraHigh);
		await camera_cont.initialize();
		setState(() => loading = false);
		await camera_cont.prepareForVideoRecording();
		for(int i = 0; i < 100; i++)
		{
			setState(() => counter = i);
			await camera_cont.startVideoRecording();
			await camera_cont.pauseVideoRecording();
			await camera_cont.resumeVideoRecording();
			await Future.delayed(const Duration(milliseconds: 100));
			final file = await camera_cont.stopVideoRecording();
			await File(file.path).delete();
		}
	}

	@override Widget build(BuildContext context)
	{
		if(loading)return const Center(child: CircularProgressIndicator());
		else return Stack(
			alignment: Alignment.center,
			children: [
				CameraPreview(camera_cont),
				Text("$counter"),
			],
		);
	}
}

Screenshots or Video

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Logs

Logs 
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Flutter Doctor output

Doctor output 
[✓] Flutter (Channel stable, 3.10.6, on macOS 13.5 22G74 darwin-x64)

Activity

  1. danagbemava-nc
    added
    in triagePresently being triaged by the triage team
    on Aug 7, 2023

  2. danagbemava-nc commented on Aug 7, 2023

    @danagbemava-nc
    danagbemava-nc
    on Aug 7, 2023
    Member

    I can reproduce the crash using the code sample provided above.

    The crash didn't always reproduce for me. It took a few re-runs of the app to reproduce the crash.

    Waiting for Nexus to connect...
Launching lib/main.dart on Nexus in debug mode...
Automatically signing iOS for device deployment using specified development team in Xcode project: X8NNQ9CYL2
Xcode build done.                                           17.0s
(lldb) 2023-08-07 09:33:32.504709+0000 Runner[9571:1041889] [VERBOSE-2:FlutterDarwinContextMetalImpeller.mm(37)] Using the Impeller rendering backend.
The selected imageFormatGroup is not supported by iOS. Defaulting to brga8888
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[AVAssetWriterInputPixelBufferAdaptor appendPixelBuffer:withPresentationTime:] invalid parameter not satisfying: CMTIME_IS_NUMERIC(presentationTime)'
*** First throw call stack:
(0x196438cb4 0x18f4d83d0 0x1a5d5c1ec 0x1005ddac0 0x1b005663c 0x1b0056508 0x1b3203608 0x1b33ce728 0x19d8ffeac 0x19d903330 0x19d916908 0x19d90740c 0x19d9080a4 0x19d912cdc 0x1f626dddc 0x1f626db7c)
libc++abi: terminating due to uncaught exception of type NSException
* thread #7, queue = 'io.flutter.camera.captureSessionQueue', stop reason = signal SIGABRT
    frame #0: 0x00000001d53f5578 libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`:
->  0x1d53f5578 <+8>:  b.lo   0x1d53f5598               ; <+40>
    0x1d53f557c <+12>: pacibsp
    0x1d53f5580 <+16>: stp    x29, x30, [sp, #-0x10]!
    0x1d53f5584 <+20>: mov    x29, sp
Target 0: (Runner) stopped.
Lost connection to device.

Exited.
    flutter doctor -v 
    [!] Flutter (Channel stable, 3.10.6, on macOS 13.4.1 22F770820d darwin-arm64, locale en-GB)
    • Flutter version 3.10.6 on channel stable at /Users/nexus/dev/sdks/flutter
    ! Warning: `flutter` on your path resolves to /Users/nexus/dev/sdks/flutter_beta/bin/flutter, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutter. Consider adding /Users/nexus/dev/sdks/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to /Users/nexus/dev/sdks/flutter_beta/bin/dart, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutter. Consider adding /Users/nexus/dev/sdks/flutter/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision f468f3366c (4 weeks ago), 2023-07-12 15:19:05 -0700
    • Engine revision cdbeda788a
    • Dart version 3.0.6
    • DevTools version 2.23.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-33, build-tools 33.0.1
    • Java binary at: /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/223.8836.35.2231.10406996/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.3)
    • Xcode at /Applications/Xcode-14.3.0.app/Contents/Developer
    • Build 14E222b
    • CocoaPods version 1.12.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.2)
    • Android Studio at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/222.4459.24.2221.10121639/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)

[✓] Android Studio (version 2022.3)
    • Android Studio at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/223.8836.35.2231.10406996/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2)
    • IntelliJ at /Users/nexus/Applications/JetBrains Toolbox/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 75.1.4
    • Dart plugin version 232.8660.129

[✓] IntelliJ IDEA Ultimate Edition (version 2023.1.4)
    • IntelliJ at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/IDEA-U/ch-0/231.9225.16/IntelliJ IDEA.app
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2)
    • IntelliJ at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/IDEA-U/ch-0/232.8660.185/IntelliJ IDEA.app
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.81.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.70.0

[✓] Connected device (3 available)
    • Nexus (mobile)  • 00008020-001875E83A38002E • ios            • iOS 16.6 20G75
    • macOS (desktop) • macos                     • darwin-arm64   • macOS 13.4.1 22F770820d darwin-arm64
    • Chrome (web)    • chrome                    • web-javascript • Google Chrome 115.0.5790.114

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

    [!] Flutter (Channel master, 3.13.0-17.0.pre.76, on macOS 13.4.1 22F770820d darwin-arm64, locale en-GB)
    • Flutter version 3.13.0-17.0.pre.76 on channel master at /Users/nexus/dev/sdks/flutters
    ! Warning: `flutter` on your path resolves to /Users/nexus/dev/sdks/flutter_beta/bin/flutter, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutters. Consider adding /Users/nexus/dev/sdks/flutters/bin to the front of your path.
    ! Warning: `dart` on your path resolves to /Users/nexus/dev/sdks/flutter_beta/bin/dart, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutters. Consider adding /Users/nexus/dev/sdks/flutters/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision bfbe79feb2 (8 hours ago), 2023-08-06 21:47:34 -0400
    • Engine revision 15b5707af4
    • Dart version 3.2.0 (build 3.2.0-41.0.dev)
    • DevTools version 2.26.1
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 33.0.1)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-33, build-tools 33.0.1
    • Java binary at: /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/223.8836.35.2231.10406996/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 14.3)
    • Xcode at /Applications/Xcode-14.3.0.app/Contents/Developer
    • Build 14E222b
    • CocoaPods version 1.12.1

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.2)
    • Android Studio at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/222.4459.24.2221.10121639/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b802.4-9586694)

[✓] Android Studio (version 2022.3)
    • Android Studio at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/AndroidStudio/ch-0/223.8836.35.2231.10406996/Android Studio.app/Contents
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.1.4)
    • IntelliJ at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/IDEA-U/ch-0/231.9225.16/IntelliJ IDEA.app
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2)
    • IntelliJ at /Users/nexus/Library/Application Support/JetBrains/Toolbox/apps/IDEA-U/ch-0/232.8660.185/IntelliJ IDEA.app
    • Flutter plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
      🔨 https://plugins.jetbrains.com/plugin/6351-dart

[✓] VS Code (version 1.81.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.70.0

[✓] Connected device (3 available)
    • Nexus (mobile)  • 00008020-001875E83A38002E • ios            • iOS 16.6 20G75
    • macOS (desktop) • macos                     • darwin-arm64   • macOS 13.4.1 22F770820d darwin-arm64
    • Chrome (web)    • chrome                    • web-javascript • Google Chrome 115.0.5790.114

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.
  3. danagbemava-nc
    added
    platform-iosiOS applications specifically
    p: cameraThe camera plugin
    packageflutter/packages repository. See also p: labels.
    has reproducible stepsThe issue has been confirmed reproducible and is ready to work on
    c: fatal crashCrashes that terminate the process
    found in release: 3.10Found to occur in 3.10
    fyi-ecosystemFor the attention of Ecosystem team
    team-iosOwned by iOS platform team
    found in release: 3.13Found to occur in 3.13
    and removed
    in triagePresently being triaged by the triage team
    on Aug 7, 2023

  4. misos1 commented on Aug 7, 2023

    @misos1
    misos1
    on Aug 7, 2023
    Author

    The crash didn't always reproduce for me. It took a few re-runs of the app to reproduce the crash.

    It can sometimes trigger #132016 or even #69874. Or did it actually count to 99?

  5. danagbemava-nc commented on Aug 7, 2023

    @danagbemava-nc
    danagbemava-nc
    on Aug 7, 2023
    Member

    It counted to 99 in some cases

  6. stuartmorgan-g
    added
    P2Important issues not at the top of the work list
    on Aug 7, 2023

  7. 7 remaining items

  8. flutter-triage-bot
    removed
    ⏳Bot is counting down the days until it unassigns the issue
    on Feb 27, 2024
  9. stuartmorgan-g
    added
    triaged-ecosystemTriaged by Ecosystem team
    on Feb 27, 2024
  10. flutter-triage-bot
    removed
    fyi-ecosystemFor the attention of Ecosystem team
    triaged-ecosystemTriaged by Ecosystem team
    on Feb 27, 2024
  11. hellohuanlin
    added
    triaged-iosTriaged by iOS platform team
    on Feb 28, 2024
  12. hellohuanlin
    self-assigned this
    on Feb 28, 2024
  13. flutter-triage-bot
    added
    ⏳Bot is counting down the days until it unassigns the issue
    on Jul 3, 2024

  14. flutter-triage-bot commented on Jul 3, 2024

    @flutter-triage-bot
    flutter-triage-botbot
    on Jul 3, 2024

    This issue is assigned to @hellohuanlin but has had no recent status updates. Please consider unassigning this issue if it is not going to be addressed in the near future. This allows people to have a clearer picture of what work is actually planned. Thanks!

  15. auto-submit
    closed this as completedin packages#6897on Jul 9, 2024
  16. auto-submit
    added a commit that references this issue on Jul 9, 2024

    [camera_avfoundation] fix sample times not being numeric after pause/…

    8e6ac90
  17. danagbemava-nc
    added
    r: fixedIssue is closed as already fixed in a newer version
    on Jul 10, 2024

  18. github-actions commented on Jul 24, 2024

    @github-actions
    github-actionsbot
    on Jul 24, 2024 – with GitHub Actions

    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

  19. github-actions
    locked as resolved and limited conversation to collaborators on Jul 24, 2024
  20. creatorpiyush
    added a commit that references this issue on Jun 10, 2026

    [camera_avfoundation] fix sample times not being numeric after pause/…

    e43b259
  21. bisor0627
    added a commit that references this issue on Jun 19, 2026

    [camera_avfoundation] fix sample times not being numeric after pause/…

    dcc3558
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⏳Bot is counting down the days until it unassigns the issueP2Important issues not at the top of the work listc: fatal crashCrashes that terminate the processfound in release: 3.10Found to occur in 3.10found in release: 3.13Found to occur in 3.13has reproducible stepsThe issue has been confirmed reproducible and is ready to work onp: cameraThe camera pluginpackageflutter/packages repository. See also p: labels.platform-iosiOS applications specificallyr: fixedIssue is closed as already fixed in a newer versionteam-iosOwned by iOS platform teamtriaged-iosTriaged by iOS platform team

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