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AVFoundation을 사용하여 내 응용 프로그램에 비디오를 녹화하고 있습니다. 카메라를 전환하지 않으면 촬영이 올바르게 작동합니다. 카메라를 전환하자 마자 녹음이 멈 춥니 다. 디버깅 후 나는 buffer delegate 메소드에서 videoConnection 객체를 얻지 못하고 있음을 발견했다. 그래서 조건이 만족되지 않기 때문에 내 대리자 메서드가 호출되지 않습니다.iOS에서 AVFoundation을 사용하여 카메라를 전환 한 후 비디오 녹화가 작동하지 않습니다.
어떻게 든 코드에서 잘못된 것을 찾을 수 없습니다. 여기 내 코드
어떤 종류의 도움을 주시면 감사하겠습니다. 감사.
// I am calling this method to setup the session from viewDidLoad
- (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;
}
// When user tap on switch camera button , I am calling this method
-(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 alloc]initWithDevice: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 commitConfiguration];
break;
}
}
}
// This is delegate method
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
{
CMFormatDescriptionRef formatDescription = CMSampleBufferGetFormatDescription(sampleBuffer);
CFRetain(sampleBuffer);
CFRetain(formatDescription);
dispatch_async(movieWriterQ, ^{
NSString *mediaType = nil;
if(self.assetWriter)
{
BOOL wasReadyToRecord = (readyToRecordAudio && readyToRecordVideo);
if(connection == self.videoConnection)// this condition is not excuting after switch camera
{
if(!readyToRecordVideo)
readyToRecordVideo = [self setupAssetWriterVideoInput:formatDescription];
mediaType = AVMediaTypeVideo;
}
else if(connection == self.audioConnection)
{
if(!readyToRecordAudio)
readyToRecordAudio = [self setupAssetWriterAudioInput:formatDescription];
mediaType = AVMediaTypeAudio;
}
BOOL isReadyToRecord = (readyToRecordAudio && readyToRecordVideo);
if(!wasReadyToRecord && isReadyToRecord)
{
LogDebug(LOG_MODULE, @"Send recording did being");
recordingWillStart = NO;
recording = YES;
dispatch_async(dispatch_get_main_queue(), ^{
[self.delegate recordingDidBeginToOutputFileURL:self.outputUrl withID:self.recordingID];
});
}
if(mediaType != nil)
{
if(readyToRecordVideo && readyToRecordAudio)
[self writeSampleBuffer:sampleBuffer ofType:mediaType];
}
}
CFRelease(sampleBuffer);
CFRelease(formatDescription);
});
}