ios - captureOutput :didOutputSampleBuffer:from connection: 中的方向问题

Question

我正在尝试处理 AVCaptureSession 的每一帧并在 UIImageView 中预览过滤后的图像。它有效，但 UIImageView 中的图像出现旋转(和扭曲)。我一直试图在这里和在谷歌中找到答案，但我找不到任何可行的解决方案...有人知道要尝试什么吗？

顺便说一句，我正在使用 Swift 3.0

这是我使用的代码:

func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, from connection: AVCaptureConnection!) {

    let pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
    let attachments = CMCopyDictionaryOfAttachments(kCFAllocatorMalloc, sampleBuffer!, kCMAttachmentMode_ShouldPropagate)
    let coreImage = CIImage(cvImageBuffer: pixelBuffer!, options: attachments as! [String : Any]?)
    var filteredImage = UIImage(ciImage: coreImage, scale: 1.0, orientation: UIImageOrientation.right)

    if filter {
        NSLog("FILTER ACTIVATED")
        let filterType = CIFilter(name: "CISepiaTone")
        filterType?.setValue(coreImage, forKey: kCIInputImageKey)
        filterType?.setValue(0.5, forKey: kCIInputIntensityKey)
        filteredImage = UIImage(ciImage: filterType!.value(forKey: kCIOutputImageKey) as! CIImage!, scale: filteredImage.scale, orientation: UIImageOrientation.right)
    }

    DispatchQueue.main.async() {
        self.imageViewPreview.image = filteredImage // UIImageView
    }
}

这是我在预览中看到的:

UIImageView preview

提前致谢

Answer 1

我找到了!结果我不得不在该方法中添加行 connection.videoOrientation = AVCaptureVideoOrientation.portrait...