記錄與AVFoundation

Question

視頻我創建了會話，設備，輸入和輸出，但是當我打電話startRecordingToOutputFileURL：recordingDelegate：方法，它調用didFinishRecordingToOutputFileAtURL委託方法，所以它完成，而無需啓動！

這是我的代碼..

-(void)viewWillAppear:(BOOL)animated { 
[super viewWillAppear:animated]; 

AVCaptureSession *session = [[AVCaptureSession alloc] init]; 
[session setSessionPreset:AVCaptureSessionPresetPhoto]; 

AVCaptureDevice *inputDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; 


AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:&error]; 

if ([session canAddInput:deviceInput]) { 
[session addInput:deviceInput]; 
} 

AVCaptureVideoPreviewLayer *previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session]; 

[previewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill]; 
CALayer *rootLayer = [[self view] layer]; 
[rootLayer setMasksToBounds:YES]; 
CGRect frame = self.view.frame; 

[previewLayer setFrame:frame]; 

[rootLayer insertSublayer:previewLayer atIndex:0]; 

_movieFileOutput = [[AVCaptureMovieFileOutput alloc] init]; 

if ([session canAddOutput:movieFileOutput]) { 
    [session addOutput:movieFileOutput]; 
} 

[session startRunning]; 
} 
-(void)buttonClicked { 
[_movieFileOutput startRecordingToOutputFileURL:url recordingDelegate:self]; 
} 

- (void)captureOutput:(AVCaptureFileOutput *)captureOutput 
didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL 
     fromConnections:(NSArray *)connections 
      error:(NSError *)error { 
    //This method is getting called when I press the button 
    NSLog(@"Finished Recording"); 

} 

那麼，什麼是錯我的代碼？ 我錯過了什麼嗎？

謝謝

Answer 1

最後它的工作！

問題在於URL。 我已經嘗試了很多非工作的URL，它必須在NSDocumentsDirectory中，就是這樣！