Hi there,

I was wondering if it's possible to take multiple photos without actually leaving the camera screen?

I'm working on an app where the user may want to take multiple photos at once (similar to iOS burst mode).

Thanks!

Hi, with version 1.0.1 , 1.0.2 and 1.0.2+1 when I try to init the camera it crashes the app on iOS. This is somehow related to Flutter version 3.0.5, with Flutter 2.10.4 version 1.0.1 worked with no problem.

Thanks in advance!

Here are my Logs :

flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ 🐛 2022-08-02 13:54:57.384222 DEBUG AppLog CameraBloc : Has flash true
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ 🐛 2022-08-02 13:54:57.385934 DEBUG AppLog CameraBloc : initializeCameraController
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ 🐛 2022-08-02 13:54:57.393566 DEBUG AppLog CameraBloc : cameras [CameraDescription(com.apple.avfoundation.avcapturedevice.built-in_video:0, CameraLensDirection.back, 90), CameraDescription(com.apple.avfoundation.avcapturedevice.built-in_video:1, CameraLensDirection.front, 90)]
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ 🐛 2022-08-02 13:54:57.396570 DEBUG AppLog CameraBloc : PermissionStatus.granted
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: ┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
flutter: │ 🐛 2022-08-02 13:54:57.397339 DEBUG AppLog CameraBloc : _initCamera
flutter: └───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
[VERBOSE-3:platform_message_handler_ios.mm(106)] Check failed: task_runners_.GetPlatformTaskRunner()->RunsTasksOnCurrentThread().
* thread #37, queue = 'io.flutter.camera.dispatchqueue', stop reason = signal SIGABRT
    frame #0: 0x00000001bba08bbc libsystem_kernel.dylib`__pthread_kill + 8
libsystem_kernel.dylib`__pthread_kill:
->  0x1bba08bbc <+8>:  b.lo   0x1bba08bd8               ; <+36>
    0x1bba08bc0 <+12>: stp    x29, x30, [sp, #-0x10]!
    0x1bba08bc4 <+16>: mov    x29, sp
    0x1bba08bc8 <+20>: bl     0x1bba0460c               ; cerror_nocancel
Target 0: (Runner) stopped.
Lost connection to device.

Tested on iPhoneX - iOS 15.4.1

flutter doctor --verbose [✓] Flutter (Channel stable, 3.0.5, on macOS 12.4 21F79 darwin-x64, locale en-BG) • Flutter version 3.0.5 at /Users/galeen/soft/flutter2 • Upstream repository https://github.com/flutter/flutter.git • Framework revision f1875d570e (3 weeks ago), 2022-07-13 11:24:16 -0700 • Engine revision e85ea0e79c • Dart version 2.17.6 • DevTools version 2.12.2

[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.2) • Android SDK at /Users/galeen/Library/Android/sdk • Platform android-31, build-tools 30.0.2 • ANDROID_HOME = /Users/galeen/Library/Android/sdk • Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java • Java version OpenJDK Runtime Environment (build 11.0.12+0-b1504.28-7817840) • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 13.4.1) • Xcode at /Applications/Xcode.app/Contents/Developer • CocoaPods version 1.11.3

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

[✓] Android Studio (version 2021.2) • Android Studio at /Applications/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 11.0.12+0-b1504.28-7817840)

[✓] Connected device (3 available) • FL iPhone X (mobile) • e698b0ece23b534f74e736ed49046f021c6afe2c • ios • iOS 15.4.1 19E258 • macOS (desktop) • macos • darwin-x64 • macOS 12.4 21F79 darwin-x64 • Chrome (web) • chrome • web-javascript • Google Chrome 103.0.5060.134

[✓] HTTP Host Availability • All required HTTP hosts are available

• No issues found!

Flutter automatically updated pubspec.lock and .flutter-plugins-dependencies. I am not sure whats that. Never made myself a plugin before.

I was the reported of the original issue. After seeing no activity, I thought, I can fix this myself. The fix is working on my end. And I do not think it should cause any other side effect.

I had debated the approach of adding remove handler function to plugin repository. But it would have required us to create a custom class implementing both those methods and using that class as parameter in maybeStartListening. The method I chose was the easiest to implement with least effect on the functionality and code. Every comment appreciated

We are grateful to you for adding things that this library flutter team didn't care about. I and my team will let you know if there is an error or a performance issue for the library to improve.

Thank you ! Best regards

Really hard to debug this as it doesn't happen on Android obviously but on iOS 13.x & iOS 14 with Xcode 11.7 the following hard app crash occurs.

2020-09-23 13:10:19.931208-0700 Runner[57108:1957620] play!
2020-09-23 13:10:19.931353-0700 Runner[57108:1957620] -[NSNull boolValue]: unrecognized selector sent to instance 0x1f2929f00
2020-09-23 13:10:19.933314-0700 Runner[57108:1957620] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull boolValue]: unrecognized selector sent to instance 0x1f2929f00'
*** First throw call stack:
(0x1a5990114 0x1b91b6cb4 0x1a58a09b8 0x1a5992758 0x1a59946cc 0x108c9be98 0x108c9b104 0x1055ab554 0x104db7524 0x105074220 0x104dbfd80 0x104dc21b0 0x1a5910a30 0x1a5910634 0x1a590fb14 0x1a5909eb0 0x1a5909200 0x1bba04598 0x1a81cf004 0x1a81d45d8 0x102101724 0x1a55e8598)
libc++abi.dylib: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull boolValue]: unrecognized selector sent to instance 0x1f2929f00'
terminating with uncaught exception of type NSException
(lldb) 

Digging into the only thing I was able to find was this 
![Screen Shot 2020-09-23 at 1 17 43 PM](https://user-images.githubusercontent.com/3769441/94066596-8cae0c00-fda1-11ea-8f92-543a916768a0.png)

Without this fix you cannot be sure if your current camera has flash, or if it's just flash on another camera. On iOS the entire app willl crash if you try to take a photo with flash on a camera that doesn't have flash, with this fix you can actually check the flash availability correctly.

Hi, Can you add the exposure compensation function? I saw the complete code on a pull request of flutter "camera" plugin. So you just need to copy/paste the code. I already did it with standard flutter camera, but I think I'll do it again using this better_camera as starting point (so I could have more features).

But after that, I'd like to ask you if you can implement a tap to exposure function (like tap to focus but for exposure) that works with exposure compensation mentioned before.

In this way I can tap on dark areas of my picture to expose there, and then compensate with +2 for example.

Thank you in advance.

Android 6.0

W/LegacyRequestMapper(12202): convertRequestMetadata - control.awbRegions setting is not supported, ignoring value W/LegacyRequestMapper(12202): Only received metering rectangles with weight 0. W/LegacyRequestMapper(12202): Only received metering rectangles with weight 0.

Hi thanks for this great plugin. I have an issue on iPads only. When I try to initialise the camera it stops at await availableCameras(); Has anyone seen such problem?

Thanks in advance!

Testing on iPad 9th 15.3.1 and iPad mini 5th Generation 15.4

flutter_better_camera: ^1.0.2+1

[✓] Flutter (Channel stable, 2.5.3, on macOS 12.2.1 21D62 darwin-x64, locale en-BG) • Flutter version 2.5.3 at /Users/galeen/soft/flutter2 • Upstream repository https://github.com/flutter/flutter.git • Framework revision 18116933e7 (6 months ago), 2021-10-15 10:46:35 -0700 • Engine revision d3ea636dc5 • Dart version 2.14.4

[✓] Xcode - develop for iOS and macOS • Xcode at /Applications/Xcode.app/Contents/Developer • Xcode 13.3, Build version 13E113 • CocoaPods version 1.11.2

void initializeCameraController() async {
    Log.d("initializeCameraController", tag);
    try {
      var cameras = await availableCameras();
      
      //this log is never called on iPad
      Log.d("cameras $cameras", tag);

      var resolutionPreset = getResolutionPreset();

      if (resolutionPreset == null) {
            Log.d("Missing resolutionPreset", tag);

            return;
          }

      cameraController = CameraController(cameras[0], resolutionPreset,
              enableAudio: false, enableAutoExposure: false, autoFocusEnabled: true);

      await PermissionHandlerService().requestCameraPermission(
              onHasPermission: _initCamera,
              onShowExplainDialog: () {
                add(ShowPermissionDialog());
              },
          tag: tag);
    } catch (e) {
      Log.error("initializeCameraController", error: e, tag: tag);
    }
  }

I am getting this error for Android 12 OS device.. Let me know once this issue is fixed...

D/Camera2BasicFragment(24827): ONCAPTURECOMPLETED D/Camera2BasicFragment(24827): UNLOCK FOCUS D/EGL_emulation(24827): app_time_stats: avg=187.77ms min=36.22ms max=552.19ms count=6 D/EGL_emulation(24827): app_time_stats: avg=176.55ms min=105.06ms max=243.99ms count=6 E/CameraCaptureSession(24827): Session 0: Exception while stopping repeating: E/CameraCaptureSession(24827): android.hardware.camera2.CameraAccessException: CAMERA_ERROR (3): The camera device has encountered a serious error E/CameraCaptureSession(24827): at android.hardware.camera2.impl.CameraDeviceImpl.checkIfCameraClosedOrInError(CameraDeviceImpl.java:2350) E/CameraCaptureSession(24827): at android.hardware.camera2.impl.CameraDeviceImpl.stopRepeating(CameraDeviceImpl.java:1277) E/CameraCaptureSession(24827): at android.hardware.camera2.impl.CameraCaptureSessionImpl.close(CameraCaptureSessionImpl.java:579) E/CameraCaptureSession(24827): at io.flutter.plugins.camera.Camera.closeCaptureSession(Camera.java:949) E/CameraCaptureSession(24827): at io.flutter.plugins.camera.Camera.close(Camera.java:955) E/CameraCaptureSession(24827): at io.flutter.plugins.camera.Camera$2.onError(Camera.java:291) E/CameraCaptureSession(24827): at android.hardware.camera2.impl.CameraDeviceImpl.notifyError(CameraDeviceImpl.java:1748) E/CameraCaptureSession(24827): at android.hardware.camera2.impl.CameraDeviceImpl.$r8$lambda$KBQCqQRdhVVn7uHI9Xdha6OqnsU(Unknown Source:0) E/CameraCaptureSession(24827): at android.hardware.camera2.impl.CameraDeviceImpl$$ExternalSyntheticLambda0.accept(Unknown Source:8) E/CameraCaptureSession(24827): at com.android.internal.util.function.pooled.PooledLambdaImpl.doInvoke(PooledLambdaImpl.java:281) E/CameraCaptureSession(24827): at com.android.internal.util.function.pooled.PooledLambdaImpl.invoke(PooledLambdaImpl.java:204) E/CameraCaptureSession(24827): at com.android.internal.util.function.pooled.OmniFunction.run(OmniFunction.java:97) E/CameraCaptureSession(24827): at android.os.Handler.handleCallback(Handler.java:938) E/CameraCaptureSession(24827): at android.os.Handler.dispatchMessage(Handler.java:99) E/CameraCaptureSession(24827): at android.os.Looper.loopOnce(Looper.java:201) E/CameraCaptureSession(24827): at android.os.Looper.loop(Looper.java:288) E/CameraCaptureSession(24827): at android.app.ActivityThread.main(ActivityThread.java:7839) E/CameraCaptureSession(24827): at java.lang.reflect.Method.invoke(Native Method) E/CameraCaptureSession(24827): at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) E/CameraCaptureSession(24827): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

I have a problem when turn on/off the flash. I am using flutter_better_camera: 1.0.2+1

Here is code using in my app:

//Turn off
controller.setFlashMode(FlashMode.off);

//Turn on
controller.setFlashMode(FlashMode.torch);

This code not work on iOS device. But work fine on Android device.

I was try catch but don't have any exception. Pls help me check it. Thank in advance

Seldom crash on iOS, but it does occur now and again. here is the error log:

Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x000068523559d350
Crashed: com.apple.main-thread
0  libobjc.A.dylib                0x1b0f8b1e0 objc_msgSend + 32
1  Flutter                        0x1063f1380 (Missing)
2  flutter_better_camera          0x106229948 -[FLTCam onCancelWithArguments:] + 48
3  Flutter                        0x1069a141c (Missing)
4  Flutter                        0x1064180d8 (Missing)
5  Flutter                        0x106714f8c (Missing)
6  Flutter                        0x1066b5d94 (Missing)
7  Flutter                        0x1066b7bf4 (Missing)
8  CoreFoundation                 0x19c46522c __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 32
9  CoreFoundation                 0x19c464e28 __CFRunLoopDoTimer + 1076
10 CoreFoundation                 0x19c464278 __CFRunLoopDoTimers + 328
11 CoreFoundation                 0x19c45e02c __CFRunLoopRun + 1944
12 CoreFoundation                 0x19c45d360 CFRunLoopRunSpecific + 600
13 GraphicsServices               0x1b3a9b734 GSEventRunModal + 164
14 UIKitCore                      0x19eed8584 -[UIApplication _run] + 1072
15 UIKitCore                      0x19eedddf4 UIApplicationMain + 168
16 Runner                         0x104a03a70 main + 15 (AppDelegate.swift:15)
17 libdyld.dylib                  0x19c119cf8 start + 4

This crash only occurs sometimes when the app is minimised and resumed on iOS. The logs are:

Crashed: com.apple.main-thread
EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x00007356dbc81bd0
Crashed: com.apple.main-thread
0  libobjc.A.dylib                0x1bc87a1e0 objc_msgSend + 32
1  Flutter                        0x106539380 (Missing)
2  flutter_better_camera          0x106385948 -[FLTCam onCancelWithArguments:] + 48
3  Flutter                        0x106ae941c (Missing)
4  Flutter                        0x1065600d8 (Missing)
5  Flutter                        0x10685cf8c (Missing)
6  Flutter                        0x1067fdd94 (Missing)
7  Flutter                        0x1067ffbf4 (Missing)
8  CoreFoundation                 0x1a7d5422c __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 32
9  CoreFoundation                 0x1a7d53e28 __CFRunLoopDoTimer + 1076
10 CoreFoundation                 0x1a7d53278 __CFRunLoopDoTimers + 328
11 CoreFoundation                 0x1a7d4d02c __CFRunLoopRun + 1944
12 CoreFoundation                 0x1a7d4c360 CFRunLoopRunSpecific + 600
13 GraphicsServices               0x1bf38a734 GSEventRunModal + 164
14 UIKitCore                      0x1aa7c7584 -[UIApplication _run] + 1072
15 UIKitCore                      0x1aa7ccdf4 UIApplicationMain + 168
16 Runner                         0x104b4fa70 main + 15 (AppDelegate.swift:15)
17 libdyld.dylib                  0x1a7a08cf8 start + 4