AVCam保存全屏捕获的图像

Question

我使用苹果公司制作的AVCam作为我的自定义相机视图.老实说,AVCamViewController如果你第一次看到它,那么理解课堂上发生的事情并不简单.

现在我感兴趣他们如何设置捕获图像的帧.我试图找到一些名人或类似的东西,但我没有找到任何.

我在谷歌搜索,发现AVCam的答案不在全屏

但是当我实现该解决方案时,我才意识到它只是制作了与我的视图相同大小的实时相机预览图层,但是当应用程序将图像保存- (IBAction)snapStillImage:(id)sender在图库中的方法中时,图像仍然是左右两个条纹.

我的问题是如何删除此条纹或源代码中的哪一行苹果设置这个东西？

另外作为额外的子问题我如何设置类型创建只是照片,因为该应用程序请求我"麦克风设置",我不需要它只需要拍一张照片,就是这样.

来自apple源的此代码将图像保存到照片库.

- (IBAction)snapStillImage:(id)sender
{
    dispatch_async([self sessionQueue], ^{
        // Update the orientation on the still image output video connection before capturing.
        [[[self stillImageOutput] connectionWithMediaType:AVMediaTypeVideo] setVideoOrientation:[[(AVCaptureVideoPreviewLayer *)[[self previewView] layer] connection] videoOrientation]];

        // Flash set to Auto for Still Capture
        [AVCamViewController setFlashMode:AVCaptureFlashModeAuto forDevice:[[self videoDeviceInput] device]];

        // Capture a still image.
        [[self stillImageOutput] captureStillImageAsynchronouslyFromConnection:[[self stillImageOutput] connectionWithMediaType:AVMediaTypeVideo] completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {

            if (imageDataSampleBuffer)
            {
                NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];

                UIImage *image = [[UIImage alloc] initWithData:imageData];

                UIImage *proccessingImage = [SAPAdjustImageHelper adjustImage:image];

                NSNumber *email_id = [SAPCoreDataEmailHelper currentEmailId];

                [SAPFileManagerHelper addImage:proccessingImage toFolderWithEmailId:email_id];
            }
        }];
    });
}

Answer 1

你在设置会话预设吗？

您可以将会话与会话预设集中使用AVCaptureSessionPresetPhoto.

对于另一个子问题:您只需要添加AVCaptureStillImageOutput输出.

如何设置会话预设？

[session setSessionPreset:AVCaptureSessionPresetPhoto];

如何配置会话只使用StillImageOutput拍照和？

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Create the AVCaptureSession
    AVCaptureSession *session = [[AVCaptureSession alloc] init];
    [self setSession:session];

    // Setup the preview view
    [[self previewView] setSession:session];

    // Setup the session Preset          
    [session setSessionPreset:AVCaptureSessionPresetPhoto];

    // Check for device authorization
    [self checkDeviceAuthorizationStatus];

    dispatch_queue_t sessionQueue = dispatch_queue_create("session queue", DISPATCH_QUEUE_SERIAL);
    [self setSessionQueue:sessionQueue];

    dispatch_async(sessionQueue, ^{
        //[self setBackgroundRecordingID:UIBackgroundTaskInvalid];

        NSError *error = nil;

        AVCaptureDevice *videoDevice = [AVCamViewController deviceWithMediaType:AVMediaTypeVideo preferringPosition:AVCaptureDevicePositionBack];
        AVCaptureDeviceInput *videoDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:videoDevice error:&error];

        if (error)
        {
            NSLog(@"%@", error);
        }

        if ([session canAddInput:videoDeviceInput])
        {
            [session addInput:videoDeviceInput];
            [self setVideoDeviceInput:videoDeviceInput];

            dispatch_async(dispatch_get_main_queue(), ^{
                // Why are we dispatching this to the main queue?
                // Because AVCaptureVideoPreviewLayer is the backing layer for AVCamPreviewView and UIView can only be manipulated on main thread.
                // Note: As an exception to the above rule, it is not necessary to serialize video orientation changes on the AVCaptureVideoPreviewLayer’s connection with other session manipulation.

                [[(AVCaptureVideoPreviewLayer *)[[self previewView] layer] connection] setVideoOrientation:(AVCaptureVideoOrientation)[self interfaceOrientation]];
            });
        }

AVCaptureStillImageOutput *stillImageOutput = [[AVCaptureStillImageOutput alloc] init];
        if ([session canAddOutput:stillImageOutput])
        {
            [stillImageOutput setOutputSettings:@{AVVideoCodecKey : AVVideoCodecJPEG}];
            [session addOutput:stillImageOutput];
            [self setStillImageOutput:stillImageOutput];
        }
    });
}