使用前置摄像头时需要镜像视频方向和处理旋转

Question

我无法弄清楚如何处理前置摄像头视频捕捉方向.在捕捉视频和图片以及拍摄照片时为前置摄像头处理的所有旋转时,我都为后置摄像头处理了所有旋转,并且除了前置摄像头视频捕获外,还保存了正确方向的捕获视频和图片.

第一个问题是,在横向模式下,视频无法以正确的方向正确保存.第二个问题是保存的视频是镜像的.虽然我知道如何使用前置摄像头处理图像的这种镜像效果,但我不确定要为视频处理它的内容.

我在尝试找到专门针对这一问题的任何内容时遇到了很多麻烦,但未能这样做.如果有人能指出我解决这个特定问题的线程,那就太好了.

无论哪种方式,这里调用的方法是在设备方向改变时处理视频方向.如果正在使用前置摄像头,我不确定要添加到我的代码中的确切内容.

/**************************************************************************
    DEVICE ORIENTATION DID CHANGE
    **************************************************************************/
    func deviceOrientationDidChange() {

        println("DEVICE ORIENTATION DID CHANGE CALLED")

        let orientation: UIDeviceOrientation = UIDevice.currentDevice().orientation

        //------ IGNORE THESE ORIENTATIONS ------
        if orientation == UIDeviceOrientation.FaceUp || orientation == UIDeviceOrientation.FaceDown || orientation == UIDeviceOrientation.Unknown || orientation == UIDeviceOrientation.PortraitUpsideDown || self.currentOrientation == orientation {

            println("device orientation does not need to change --- returning...")

            return
        }


        self.currentOrientation = orientation


        //------ APPLY A ROTATION USING THE STANDARD ROTATION TRANSFORMATION MATRIX in R3 ------

        /*

            x       y       z
            ---           ---
        x | cosø    sinø    0 |
        y | -sinø   consø   0 |
        z | 0       0       1 |
            ---           ---

        */


        //----- PERFORM BUTTON AND VIDEO DATA BUFFER ROTATIONS ------
        switch orientation {

        case UIDeviceOrientation.Portrait:

            rotateButtons(self.degrees0)

            if self.usingFrontCamera == true {


            }
            else {

            }

            println("Device Orientation Portrait")

            break

        case UIDeviceOrientation.LandscapeLeft:

            println("Device Orientation LandScapeLeft")

            rotateButtons(self.degrees90)

            if self.usingFrontCamera == true {

                println("Using front camera, rotation in landscape left")

//                if let connection = self.captureConnection {
//                    
//                    connection.videoOrientation = AVCaptureVideoOrientation.LandscapeRight
//                    
//                    println("Capture connection Orientation is LandScape Right")
//                }
//                else {
//                    
//                    println("Capture connection is nil, could not change video orientation")
//                }
            }
            else {

                if let connection = self.captureConnection {

                    connection.videoOrientation = AVCaptureVideoOrientation.LandscapeRight

                    println("Capture connection Orientation is LandScape Right")
                }
                else {

                    println("Capture connection is nil, could not change video orientation")
                }
            }

            break

        case UIDeviceOrientation.LandscapeRight:

            println("Device Orientation LandscapeRight")

            rotateButtons(-self.degrees90)

            if self.usingFrontCamera == true {

                println("Using front camera, rotation in landscape right")

//                if let connection = self.captureConnection {
//                    
//                    connection.videoOrientation = AVCaptureVideoOrientation.LandscapeRight
//                    
//                    println("Capture connection Orientation is LandScape Left")
//                }
//                else {
//                    
//                    println("Capture connection is nil, could not change video orientation")
//                }
            }
            else {

                if let connection = self.captureConnection {

                    connection.videoOrientation = AVCaptureVideoOrientation.LandscapeLeft

                    println("Capture connection Orientation is LandScape Left")
                }
                else {

                    println("Capture connection is nil, could not change video orientation")
                }
            }

            break

        default:

            break
        }
    }

Answer 1

根据这个答案:视频保存在错误的方向AVCaptureSession

我遇到了同样的问题,并且能够在这篇文章后修复它.

var videoConnection:AVCaptureConnection?
  for connection in self.fileOutput.connections {
    for port in connection.inputPorts! {
      if port.mediaType == AVMediaTypeVideo {
        videoConnection = connection as? AVCaptureConnection
          if videoConnection!.supportsVideoMirroring {
            videoConnection!.videoMirrored = true
          }
        }
      }
   }
}

如果詹姆斯帮助你,请告诉我