[camera_avfoundation][iOS] Crash when enableAudio = false due to incorrect guard condition #174702
Description
Steps to reproduce
1. Create a Flutter project targeting iOS.
2. Do not add NSMicrophoneUsageDescription to ios/Runner/Info.plist.
3. Initialize a CameraController with enableAudio: false.
4. Call startVideoRecording().
5. The app crashes.
Expected results
• With enableAudio = false, the iOS implementation should not set up audio.
• Video recording should proceed normally without microphone permission.
Actual results
• Even with enableAudio = false, the iOS implementation still attempts to set up audio.
• On iOS, if NSMicrophoneUsageDescription is missing, the app crashes.
Code sample
Code sample
import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
final cams = await availableCameras();
final cam = cams.first; // Use the first available camera
runApp(MyApp(cameraDescription: cam));
}
class MyApp extends StatelessWidget {
const MyApp({super.key, required this.cameraDescription});
final CameraDescription cameraDescription;
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'MRE: enableAudio=false crash (iOS)',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
),
home: RecordPage(cameraDescription: cameraDescription),
);
}
}
class RecordPage extends StatefulWidget {
const RecordPage({super.key, required this.cameraDescription});
final CameraDescription cameraDescription;
@override
State<RecordPage> createState() => _RecordPageState();
}
class _RecordPageState extends State<RecordPage> {
late final CameraController _controller;
bool _initializing = true;
bool _recording = false;
String? _lastVideoPath;
String? _error;
@override
void initState() {
super.initState();
_controller = CameraController(
widget.cameraDescription,
ResolutionPreset.medium,
// *** Key for repro: audio explicitly disabled ***
enableAudio: false,
);
_init();
}
Future<void> _init() async {
try {
await _controller.initialize();
setState(() => _initializing = false);
} catch (e) {
setState(() {
_initializing = false;
_error = 'Initialization error: $e';
});
}
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
Future<void> _toggleRecord() async {
setState(() => _error = null);
try {
if (!_recording) {
await _controller
.startVideoRecording(); // no path; plugin returns XFile on stop
setState(() => _recording = true);
} else {
final file = await _controller.stopVideoRecording();
setState(() {
_recording = false;
_lastVideoPath = file.path;
});
}
} catch (e) {
setState(() => _error = 'Record error: $e');
}
}
@override
Widget build(BuildContext context) {
if (_initializing) {
return const Scaffold(body: Center(child: CircularProgressIndicator()));
}
if (_error != null) {
return Scaffold(
appBar: AppBar(title: const Text('MRE: enableAudio=false crash (iOS)')),
body: Center(child: Text(_error!, textAlign: TextAlign.center)),
);
}
return Scaffold(
appBar: AppBar(title: const Text('MRE: enableAudio=false crash (iOS)')),
body: Column(
children: [
Expanded(
child:
_controller.value.isInitialized
? CameraPreview(_controller)
: const Center(child: Text('Camera not initialized')),
),
if (_lastVideoPath != null)
Padding(
padding: const EdgeInsets.all(12),
child: Text('Last video: $_lastVideoPath'),
),
const SizedBox(height: 12),
],
),
floatingActionButton: FloatingActionButton.extended(
onPressed: _toggleRecord,
label: Text(_recording ? 'Stop' : 'Record'),
icon: Icon(_recording ? Icons.stop : Icons.fiber_manual_record),
),
floatingActionButtonLocation: FloatingActionButtonLocation.centerFloat,
);
}
}Screenshots or Video
Logs
Logs
[ +24 ms] Caching compiled dill
[ +54 ms] Connecting to service protocol: http://192.168.1.38:59585/Z2bm7s8zemY=/
[ +109 ms] Launching a Dart Developer Service (DDS) instance at http://127.0.0.1:0, connecting to VM service at http://192.168.1.38:59585/Z2bm7s8zemY=/.
[ +366 ms] Successfully connected to service protocol: http://192.168.1.38:59585/Z2bm7s8zemY=/
[ +40 ms] DevFS: Creating new filesystem on the device (null)
[ +29 ms] DevFS: Created new filesystem on the device (file:///private/var/mobile/Containers/Data/Application/E4080DDB-AF56-4437-A366-30DA9A50D938/tmp/bugJLvP3B/bug/)
[ +1 ms] Updating assets
[ +61 ms] Syncing files to device iPh0ne (wireless)...
[ ] Compiling dart to kernel with 0 updated files
[ ] Processing bundle.
[ ] <- recompile package:bug/main.dart 5402615f-0015-4378-bdd7-f85a3b5d95e4
[ ] <- 5402615f-0015-4378-bdd7-f85a3b5d95e4
[ ] Bundle processing done.
[ +45 ms] Updating files.
[ ] Pending asset builds completed. Writing dirty entries.
[ ] DevFS: Sync finished
[ ] Syncing files to device iPh0ne (wireless)... (completed in 47ms)
[ ] Synced 0.0MB.
[ ] <- accept
[ +12 ms] Connected to _flutterView/0x1020fd420.
[ +1 ms] Flutter run key commands.
[ ] r Hot reload. 🔥🔥🔥
[ ] R Hot restart.
[ ] h List all available interactive commands.
[ ] d Detach (terminate "flutter run" but leave application running).
[ ] c Clear the screen
[ ] q Quit (terminate the application on the device).
[ ] A Dart VM Service on iPh0ne (wireless) is available at: http://127.0.0.1:59770/o9DTLyvR2wY=/
[ +37 ms] The Flutter DevTools debugger and profiler on iPh0ne (wireless) is available at: http://127.0.0.1:9101?uri=http://127.0.0.1:59770/o9DTLyvR2wY=/
App is being debugged, do not track this hang
Hang detected: 0.46s (debugger attached, not reporting)
App is being debugged, do not track this hang
Hang detected: 0.50s (debugger attached, not reporting)
This app has crashed because it attempted to access privacy-sensitive data without a usage description. The app's Info.plist must contain an NSMicrophoneUsageDescription key with a string value explaining to the user how the app uses this data.Flutter Doctor output
Doctor output
[✓] Flutter (Channel beta, 3.36.0-0.1.pre, on macOS 15.6 24G84 darwin-arm64, locale en-US) [319ms]
• Flutter version 3.36.0-0.1.pre on channel beta at /Users/juliendelarbre/fvm/versions/3.36.0-0.1.pre
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision c84cdd0d0b (2 weeks ago), 2025-08-13 17:21:27 -0700
• Engine revision 877970cbc9
• Dart version 3.10.0 (build 3.10.0-75.1.beta)
• DevTools version 2.49.0
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-native-assets, enable-lldb-debugging
[!] Android toolchain - develop for Android devices (Android SDK version 35.0.1) [3.2s]
• Android SDK at /Users/juliendelarbre/Library/Android/sdk
• Emulator version 35.3.11.0 (build_id 12836668) (CL:N/A)
✗ Flutter requires Android SDK 36 and the Android BuildTools 28.0.3
To update the Android SDK visit https://flutter.dev/to/macos-android-setup for detailed instructions.
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] Xcode - develop for iOS and macOS (Xcode 16.4) [1,236ms]
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 16F6
• CocoaPods version 1.16.2
[✓] Chrome - develop for the web [5ms]
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Connected device (3 available) [5.8s]
• iPh0ne (wireless) (mobile) • 00008120-0016612C11C0C01E • ios • iOS 18.5 22F76
• macOS (desktop) • macos • darwin-arm64 • macOS 15.6 24G84 darwin-arm64
• Chrome (web) • chrome • web-javascript • Google Chrome 139.0.7258.155
[✓] Network resources [520ms]
• All expected network resources are available.
! Doctor found issues in 1 category.