Application crashes in AVFoundation framework in iOS 7.0.x ONLY - ios

Question

I am recording video in my app. My app crashes in iOS 7.0.x only. My application is crashing while writing the captured video in file. Below is my code to setup session & toggle camera
- (BOOL) setupSessionWithPreview:(UIView *)preview usingFrontCamera:(BOOL)frontCamera
{
AVCaptureDevice *videoDevice = nil;
if (frontCamera) {
videoDevice = [self getFrontCamera];
self.videoDeviceType = VideoDeviceTypeFrontCamera;
}
else {
videoDevice = [self getRearCamera];
self.videoDeviceType = VideoDeviceTypeRearCamera;
}
AVCaptureDevice *audioDevice = [self getAudioDevice];
self.videoInput = [[AVCaptureDeviceInput alloc] initWithDevice:videoDevice error:nil];
AVCaptureDeviceInput *audioInput = [[AVCaptureDeviceInput alloc] initWithDevice:audioDevice error:nil];
self.session = [[AVCaptureSession alloc] init];
if([self.session canAddInput:self.videoInput])
[self.session addInput:self.videoInput];
if([self.session canAddInput:audioInput])
[self.session addInput:audioInput];
self.audioOutput = [[AVCaptureAudioDataOutput alloc] init];
dispatch_queue_t audioCaptureQ = dispatch_queue_create("Audio Capture Q", DISPATCH_QUEUE_SERIAL);
[self.audioOutput setSampleBufferDelegate:self queue:audioCaptureQ];
if([self.session canAddOutput:self.audioOutput])
[self.session addOutput:self.audioOutput];
self.audioConnection = [self.audioOutput connectionWithMediaType:AVMediaTypeAudio];
self.videoOutput = [[AVCaptureVideoDataOutput alloc] init];
[self.videoOutput setAlwaysDiscardsLateVideoFrames:YES];
dispatch_queue_t videoCaptureQ = dispatch_queue_create("Video Capture Q", DISPATCH_QUEUE_SERIAL);
[self.videoOutput setSampleBufferDelegate:self queue:videoCaptureQ];
if([self.session canAddOutput:self.videoOutput])
[self.session addOutput:self.videoOutput];
self.videoConnection = [self.videoOutput connectionWithMediaType:AVMediaTypeVideo];
self.videoConnection.videoOrientation = AVCaptureVideoOrientationPortrait;
self.videoOrientation = [self.videoConnection videoOrientation];
movieWriterQ = dispatch_queue_create("Movie Writer Q", DISPATCH_QUEUE_SERIAL);
self.previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.session];
self.viewLayer = [preview layer];
[self.viewLayer setMasksToBounds:YES];
CGRect bounds = [preview bounds];
[self.previewLayer setFrame:bounds];
[self.previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
[self.viewLayer insertSublayer:self.previewLayer below:[[self.viewLayer sublayers] objectAtIndex:0]];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self.session startRunning];
});
return YES;
}
// Code to toggle camera
-(void)toggleCameraIsFront:(BOOL)isFront
{
AVCaptureDevicePosition desiredPosition;
if (isFront) {
desiredPosition = AVCaptureDevicePositionFront;
self.videoDeviceType = VideoDeviceTypeFrontCamera;
}
else {
desiredPosition = AVCaptureDevicePositionBack;
self.videoDeviceType = VideoDeviceTypeRearCamera;
}
NSArray *videoDevices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in videoDevices)
{
if ([device position] == desiredPosition)
{
AVCaptureDeviceInput *videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
[self.session beginConfiguration];
[self.session removeInput:self.videoInput];
if ([self.session canAddInput:videoDeviceInput])
{
[self.session addInput:videoDeviceInput];
[self setVideoInput:videoDeviceInput];
}
else
{
[self.session addInput:self.videoInput];
}
[self.session removeOutput:self.videoOutput];
AVCaptureVideoDataOutput *videoDeviceOutput = [[AVCaptureVideoDataOutput alloc] init];
if ([self.session canAddOutput:videoDeviceOutput])
{
[self.session addOutput:videoDeviceOutput];
[self setVideoOutput:videoDeviceOutput];
[self.videoOutput setAlwaysDiscardsLateVideoFrames:YES];
// How to manage previously created videoCaptureQ in setupSessionWithPreview method ???
// or do we need create instance variable as dispatch_queue_t videoCaptureQ ???
dispatch_queue_t videoCaptureQ = dispatch_queue_create("Video Capture Q", DISPATCH_QUEUE_SERIAL);
[self.videoOutput setSampleBufferDelegate:self queue:videoCaptureQ];
self.videoConnection = [self.videoOutput connectionWithMediaType:AVMediaTypeVideo];
self.videoConnection.videoOrientation = AVCaptureVideoOrientationPortrait;
self.videoOrientation = [self.videoConnection videoOrientation];
}
else
{
[self.session addOutput:self.videoOutput];
}
[self.session commitConfiguration];
break;
}
}
}
// Code responsible for crashing in iOS 7.0.x ONLY, Works perfectly with iOS 6.x & iOS 7.1
#property(nonatomic, retain) AVAssetWriter *writer;
#property(nonatomic, retain) AVAssetReader *reader;
#property(nonatomic, retain) AVAssetReaderVideoCompositionOutput *videoOut;
#property(nonatomic, retain) AVAssetReaderOutput *audioOut;
#property(nonatomic, retain) AVAssetWriterInput *videoIn;
#property(nonatomic, retain) AVAssetWriterInput *audioIn;
dispatch_group_enter(self.dispatchGroup);
[self.videoIn requestMediaDataWhenReadyOnQueue:self.videoWriterQ usingBlock:^(void) {
if(self.videoFinished)
return;
BOOL completedOrFailed = NO;
while([self.videoIn isReadyForMoreMediaData] && !completedOrFailed)
{
// App crashes here .
CMSampleBufferRef sample = [self.videoOut copyNextSampleBuffer];
if(sample != NULL)
{
BOOL bret = [self.videoIn appendSampleBuffer:sample];
CFRelease(sample);
sample = NULL;
completedOrFailed = !bret;
}
else
{
completedOrFailed = YES;
}
}
if(completedOrFailed)
{
if(!self.videoFinished)
{
[self.videoIn markAsFinished];
}
self.videoFinished = YES;
dispatch_group_leave(self.dispatchGroup);
}
}];
Here is the crash log
Date/Time: 2014-04-07 11:05:34.917 +0100
OS Version: iOS 7.0.6 (11B651)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x7176d7e0
Triggered by Thread: 0
Thread 0 Crashed:
0 libobjc.A.dylib 0x3848bb26 objc_msgSend + 6
1 AVFoundation 0x2cf78650 -[AVCaptureVideoDataOutput _applyOverridesToCaptureOptions:] + 168
2 AVFoundation 0x2cf7081c -[AVCaptureSession _resolvedCaptureOptionsByApplyingOverridesToCaptureOptions:preset:] + 344
3 AVFoundation 0x2cf70b2c -[AVCaptureSession _resolvedCaptureOptionsForPreset:audioDevice:videoDevice:] + 108
4 AVFoundation 0x2cf7235c -[AVCaptureSession _buildAndRunGraph] + 312
5 AVFoundation 0x2cf6cc3c -[AVCaptureSession removeInput:] + 1008
6 AVFoundation 0x2cf6ae0c -[AVCaptureSession dealloc] + 172
7 Foundation 0x2e9d1a44 NSKVODeallocate + 60
8 libobjc.A.dylib 0x3849bb06 objc_object::sidetable_release(bool) + 170
9 libobjc.A.dylib 0x3848d002 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 354
10 QuartzCore 0x3043e864 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 64
11 CoreFoundation 0x2e01b1ca __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 18
12 CoreFoundation 0x2e018b6c __CFRunLoopDoObservers + 280
13 CoreFoundation 0x2e018eae __CFRunLoopRun + 726
14 CoreFoundation 0x2df83c22 CFRunLoopRunSpecific + 518
15 CoreFoundation 0x2df83a06 CFRunLoopRunInMode + 102
16 GraphicsServices 0x32caa27e GSEventRunModal + 134
17 UIKit 0x30827044 UIApplicationMain + 1132
18 AppName 0x0013ed06 main (main.m:17)
19 libdyld.dylib 0x38998ab4 start + 0
Thread 1:
0 libsystem_kernel.dylib 0x38a3c83c kevent64 + 24
1 libdispatch.dylib 0x3897d210 _dispatch_mgr_invoke + 228
2 libdispatch.dylib 0x3897cf96 _dispatch_mgr_thread$VARIANT$mp + 34
Thread 2 name: com.apple.NSURLConnectionLoader
Thread 2:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 CoreFoundation 0x2e01a7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x2e018ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x2df83c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x2df83a06 CFRunLoopRunInMode + 102
6 Foundation 0x2e9be2f2 +[NSURLConnection(Loader) _resourceLoadLoop:] + 314
7 Foundation 0x2ea33c82 __NSThread__main__ + 1058
8 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
9 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
10 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 3 name: com.apple.CFSocket.private
Thread 3:
0 libsystem_kernel.dylib 0x38a4f440 __select + 20
1 CoreFoundation 0x2e01e680 __CFSocketManager + 480
2 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
3 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
4 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 4 name: AFNetworking
Thread 4:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 CoreFoundation 0x2e01a7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x2e018ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x2df83c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x2df83a06 CFRunLoopRunInMode + 102
6 Foundation 0x2e9713d6 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250
7 Foundation 0x2e9c230c -[NSRunLoop(NSRunLoop) run] + 76
8 AppName 0x001637b6 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:184)
9 Foundation 0x2ea33c82 __NSThread__main__ + 1058
10 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
11 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
12 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 5 name: com.apple.coremedia.player.async
Thread 5:
0 libsystem_kernel.dylib 0x38a3cadc semaphore_wait_trap + 8
1 libdispatch.dylib 0x3897b428 _dispatch_semaphore_wait_slow + 172
2 MediaToolbox 0x2f46f83c fpa_AsyncMovieControlThread + 1752
3 CoreMedia 0x2e5ae234 figThreadMain + 192
4 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 6:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 CoreFoundation 0x2e01a7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x2e018ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x2df83c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x2df83a06 CFRunLoopRunInMode + 102
6 libAVFAudio.dylib 0x2d006584 GenericRunLoopThread::Entry(void*) + 124
7 libAVFAudio.dylib 0x2cffa99c CAPThread::Entry(CAPThread*) + 176
8 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
9 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
10 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 7 name: com.apple.coremedia.player.async
Thread 7:
0 libsystem_kernel.dylib 0x38a3cadc semaphore_wait_trap + 8
1 libdispatch.dylib 0x3897b428 _dispatch_semaphore_wait_slow + 172
2 MediaToolbox 0x2f46f83c fpa_AsyncMovieControlThread + 1752
3 CoreMedia 0x2e5ae234 figThreadMain + 192
4 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 8 name: com.apple.coremedia.player.remote
Thread 8:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 MediaToolbox 0x2f475c58 FigExpressNotificationThread + 84
3 CoreMedia 0x2e5ae234 figThreadMain + 192
4 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 9:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 CoreFoundation 0x2e01a7be __CFRunLoopServiceMachPort + 150
3 CoreFoundation 0x2e018ee4 __CFRunLoopRun + 780
4 CoreFoundation 0x2df83c22 CFRunLoopRunSpecific + 518
5 CoreFoundation 0x2dfc7736 CFRunLoopRun + 94
6 CoreMotion 0x2e63a230 ___lldb_unnamed_function1404$$CoreMotion + 724
7 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
8 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
9 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 10 name: com.apple.coremedia.player.async
Thread 10:
0 libsystem_kernel.dylib 0x38a3cadc semaphore_wait_trap + 8
1 libdispatch.dylib 0x3897b428 _dispatch_semaphore_wait_slow + 172
2 MediaToolbox 0x2f46f83c fpa_AsyncMovieControlThread + 1752
3 CoreMedia 0x2e5ae234 figThreadMain + 192
4 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 11:
0 libsystem_kernel.dylib 0x38a4fc7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x38ab5dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 12:
0 libsystem_kernel.dylib 0x38a4fc7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x38ab5dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 13:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 MediaToolbox 0x2f588594 FigRemakerFamilyClient_ReaderExtractAndRetainNextSampleBuffer + 92
3 MediaToolbox 0x2f5835a0 remoteReader_ExtractAndRetainNextSampleBuffer + 108
4 AVFoundation 0x2cf2a8ba -[AVAssetReaderOutput copyNextSampleBuffer] + 222
5 AppName 0x0016a320 __36-[MediaWriter performWrite:onError:]_block_invoke141 (MediaWriter.m:188)
6 AVFoundation 0x2cf3d810 -[AVAssetWriterInputMediaDataRequester requestMediaDataIfNecessary] + 84
7 libdispatch.dylib 0x38973d18 _dispatch_call_block_and_release + 8
8 libdispatch.dylib 0x3897a26e _dispatch_queue_drain$VARIANT$mp + 370
9 libdispatch.dylib 0x3897a066 _dispatch_queue_invoke$VARIANT$mp + 38
10 libdispatch.dylib 0x3897acde _dispatch_root_queue_drain + 74
11 libdispatch.dylib 0x3897af54 _dispatch_worker_thread2 + 52
12 libsystem_pthread.dylib 0x38ab5dbc _pthread_wqthread + 296
13 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 14 name: com.apple.coremedia.player.async
Thread 14:
0 libsystem_kernel.dylib 0x38a3cadc semaphore_wait_trap + 8
1 libdispatch.dylib 0x3897b428 _dispatch_semaphore_wait_slow + 172
2 MediaToolbox 0x2f46f83c fpa_AsyncMovieControlThread + 1752
3 CoreMedia 0x2e5ae234 figThreadMain + 192
4 libsystem_pthread.dylib 0x38ab7c1a _pthread_body + 138
5 libsystem_pthread.dylib 0x38ab7b8a _pthread_start + 98
6 libsystem_pthread.dylib 0x38ab5c8c thread_start + 4
Thread 15:
0 libsystem_kernel.dylib 0x38a4fc7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x38ab5dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 16:
0 libsystem_kernel.dylib 0x38a4fc7c __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x38ab5dc6 _pthread_wqthread + 306
2 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 17:
0 libsystem_kernel.dylib 0x38a3ca8c mach_msg_trap + 20
1 libsystem_kernel.dylib 0x38a3c888 mach_msg + 44
2 MediaToolbox 0x2f5896b4 FigRemakerFamilyClient_WriterAddSampleBuffer + 112
3 MediaToolbox 0x2f581bec remoteWriter_AddSampleBuffer + 236
4 AVFoundation 0x2cf3c144 -[AVFigAssetWriterTrack addSampleBuffer:error:] + 84
5 AVFoundation 0x2cf3cfcc -[AVFigAssetWriterAudioTrack addSampleBuffer:error:] + 300
6 AVFoundation 0x2cf39afa -[AVAssetWriterInputWritingHelper appendSampleBuffer:] + 74
7 AVFoundation 0x2cf37d62 -[AVAssetWriterInput appendSampleBuffer:] + 46
8 AppName 0x0016a190 __36-[MediaWriter performWrite:onError:]_block_invoke (MediaWriter.m:162)
9 AVFoundation 0x2cf3d810 -[AVAssetWriterInputMediaDataRequester requestMediaDataIfNecessary] + 84
10 libdispatch.dylib 0x38973d18 _dispatch_call_block_and_release + 8
11 libdispatch.dylib 0x3897a26e _dispatch_queue_drain$VARIANT$mp + 370
12 libdispatch.dylib 0x3897a066 _dispatch_queue_invoke$VARIANT$mp + 38
13 libdispatch.dylib 0x3897acde _dispatch_root_queue_drain + 74
14 libdispatch.dylib 0x3897af54 _dispatch_worker_thread2 + 52
15 libsystem_pthread.dylib 0x38ab5dbc _pthread_wqthread + 296
16 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 18:
0 libsystem_kernel.dylib 0x38a3e664 fsync + 8
1 libsqlite3.dylib 0x3876d73c ___lldb_unnamed_function199$$libsqlite3.dylib + 44
2 libsqlite3.dylib 0x387a59e8 ___lldb_unnamed_function529$$libsqlite3.dylib + 1168
3 libsqlite3.dylib 0x3876d138 ___lldb_unnamed_function197$$libsqlite3.dylib + 336
4 libsqlite3.dylib 0x38763004 ___lldb_unnamed_function156$$libsqlite3.dylib + 552
5 libsqlite3.dylib 0x38744638 ___lldb_unnamed_function56$$libsqlite3.dylib + 1496
6 libsqlite3.dylib 0x3875fc32 ___lldb_unnamed_function123$$libsqlite3.dylib + 38026
7 libsqlite3.dylib 0x38755e2c sqlite3_step + 404
8 libsqlite3.dylib 0x38734952 sqlite3_exec + 358
9 CFNetwork 0x2dc14d30 __CFURLCache::ExecSQLStatement_NoLock(sqlite3*, char const*, int (*)(void*, int, char**, char**), void*, long) + 32
10 CFNetwork 0x2dc84bb8 __CFURLCache::_PreProcessCacheTasks() + 108
11 CFNetwork 0x2dc849da __CFURLCache::_CFURLCacheTimerCallback0() + 630
12 CFNetwork 0x2dc84754 __CFURLCache::_CFURLCacheTimerCallback(void*) + 28
13 libdispatch.dylib 0x3897c7fe _dispatch_source_invoke$VARIANT$mp + 258
14 libdispatch.dylib 0x3897a232 _dispatch_queue_drain$VARIANT$mp + 310
15 libdispatch.dylib 0x3897a066 _dispatch_queue_invoke$VARIANT$mp + 38
16 libdispatch.dylib 0x3897acde _dispatch_root_queue_drain + 74
17 libdispatch.dylib 0x3897af54 _dispatch_worker_thread2 + 52
18 libsystem_pthread.dylib 0x38ab5dbc _pthread_wqthread + 296
19 libsystem_pthread.dylib 0x38ab5c80 start_wqthread + 4
Thread 0 crashed with ARM Thread State (32-bit):
r0: 0x176f9f60 r1: 0x30daa1e8 r2: 0x2cfeb38f r3: 0x00000000
r4: 0x30dba133 r5: 0x18e7bde0 r6: 0x30dad051 r7: 0x27d087f8
r8: 0x38b3fc28 r9: 0x7176d7d4 r10: 0x1903c100 r11: 0x18fdbd70
ip: 0x38b1e868 sp: 0x27d087c4 lr: 0x2cf78655 pc: 0x3848bb26
cpsr: 0x60000030
Can anybody tell me what's going wrong in iOS 7.0.x ONLY ? On other iOS versions its working correctly. Any kind of help is appreciated.
Thanks.

Answer 1

Did you dealloc correctly?
Try adding these lines to your dealloc method,
[self.session removeInput:self.videoIn];
[self.session removeOutput:self.videoOut];