我正在点击这里的链接 How to apply filter to Video real-time using Swift并且出于某种原因,UIImageOrientation 向左旋转了 90 度。我试图通过将方向设置为向上来纠正此问题,但它看起来仍然相同。有谁知道这是为什么?我不确定是图像、预览层还是 ImageView 导致的
代码如下:
import UIKit
import AVFoundation
import CoreMedia
let noirFilter = CIFilter(name: "CIPhotoEffectNoir")!
let sepiaFilter = CIFilter(name: "CISepiaTone")!
let vignetteEffect = CIFilter(name: "CIVignetteEffect")!
let Filters = [noirFilter,sepiaFilter,vignetteEffect]
class TestViewController:UIViewController,AVCaptureVideoDataOutputSampleBufferDelegate {
@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var Photo: UIButton!
var sessionQueue: dispatch_queue_t!
var stillImageOutput: AVCaptureStillImageOutput?
var videoDeviceInput: AVCaptureDeviceInput?
var buttonTapped = false
override func viewDidLoad() {
super.viewDidLoad()
sessionQueue = dispatch_queue_create("com.bradleymackey.Backchat.sessionQueue",DISPATCH_QUEUE_SERIAL)
let captureSession = AVCaptureSession()
captureSession.sessionPreset = AVCaptureSessionPresetPhoto
let backCamera = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo)
var videoDeviceInput: AVCaptureVideoDeviceInput?
do
{
let input = try AVCaptureDeviceInput(device: backCamera)
captureSession.addInput(input)
self.videoDeviceInput = videoDeviceInput
}
catch
{
print("can't access camera")
return
}
// although we don't use this, it's required to get captureOutput invoked
let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
view.layer.addSublayer(previewLayer)
imageView.contentMode = UIViewContentMode.ScaleAspectFill
let videoOutput = AVCaptureVideoDataOutput()
videoOutput.setSampleBufferDelegate(self, queue: dispatch_queue_create("sample buffer delegate", DISPATCH_QUEUE_SERIAL))
if captureSession.canAddOutput(videoOutput)
{
captureSession.addOutput(videoOutput)
}
captureSession.startRunning()
let stillImageOutput: AVCaptureStillImageOutput = AVCaptureStillImageOutput()
if captureSession.canAddOutput(stillImageOutput) {
stillImageOutput.outputSettings = [AVVideoCodecKey: AVVideoCodecJPEG]
captureSession.addOutput(stillImageOutput)
self.stillImageOutput = stillImageOutput
}
}
override func viewWillLayoutSubviews() {
}
func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!)
{
let filter = Filters[1]
let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
let cameraImage = CIImage(CVPixelBuffer: pixelBuffer!)
filter.setValue(cameraImage, forKey: kCIInputImageKey)
let filteredImage = UIImage(CIImage: filter.valueForKey(kCIOutputImageKey) as! CIImage!)
var newImage = UIImage(CIImage: filter.valueForKey(kCIOutputImageKey) as! CIImage!, scale:1.0, orientation: .Up)
dispatch_async(dispatch_get_main_queue())
{
self.imageView.image = newImage
}
}
@IBAction func snapStill(sender: UIButton) {
print("snapStillImage")
let previewController = PreviewViewController(nibName: "PreviewViewController", bundle: nil)
previewController.media = Media.Photo(image: imageView.image!)
previewController.isFrontCamera = false
self.presentViewController(previewController, animated: true, completion: nil)
}
override func viewDidLayoutSubviews()
{
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
最佳答案
这是因为没有设置方向。 您需要在 captureOutput() 中设置方向
func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!)
{
connection.videoOrientation = .portrait
...
这应该可以解决您的问题。
关于ios - Swift iOS,想知道是否有人可以解释为什么输出旋转到正确的度数?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40250628/