Swift 3、iOS 10+、xCode 8.3+、Quickblox - 在保持纵横比 ratio/video 分辨率的同时切换全屏远程流

Question

我正在使用 webRTC 远程视频流并将远程会话附加到此：

@IBOutlet weak var remoteVideoElement: QBRTCRemoteVideoView!

我想要发生的是当用户点击上面的出口时，远程流填满整个 window。当用户再次点击它时，它会 return 到它在布局中的正常位置。在大多数情况下，它工作正常，除了我无法保持远程视频流的正确纵横比或屏幕分辨率。谁能帮我找出正确的方法来达到预期的效果？

这是我的代码：

var isExpanded = Bool()
var videoPlayerViewCenter = CGPoint()

override func viewDidLoad() {
        super.viewDidLoad()
        isExpanded = false

        let toggleFullScreen = UITapGestureRecognizer(target: self, action: #selector (self.toggleFullScreenRemoteVideo(sender:)))
        self.view.addGestureRecognizer(toggleFullScreen)
}

func toggleFullScreenRemoteVideo(sender: QBRTCRemoteVideoView) {
        if !isExpanded {
            // GO FULL SCREEN
            UIView.animate(withDuration: 0.8, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
                self.videoPlayerViewCenter = self.remoteVideoElement.center
                self.view.bringSubview(toFront: self.modalShadeBackground)
                self.view.bringSubview(toFront: self.remoteVideoElement)
                self.remoteVideoElement.frame = CGRect(x: 0, y: 0, width: self.view.frame.height, height: self.view.frame.width)
                self.remoteVideoElement.frame = AVMakeRect(aspectRatio: (self.remoteVideoElement.layer.preferredFrameSize()), insideRect: self.remoteVideoElement.frame)
                self.remoteVideoElement.contentMode = .scaleAspectFit
                self.remoteVideoElement.frame = UIScreen.main.bounds
                self.remoteVideoElement.center = self.view.center
                self.remoteVideoElement.transform = CGAffineTransform(rotationAngle: CGFloat(Double.pi / 2))
                self.remoteVideoElement.layoutSubviews()
            }, completion: nil)
        } else {
            // REVERT BACK TO ORIGINAL CONTRAINTS IN THE LAYOUT
            UIView.animate(withDuration: 0.8, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
                self.remoteVideoElement.transform = CGAffineTransform.identity
                self.remoteVideoElement.center = self.videoPlayerViewCenter
                self.view.sendSubview(toBack: self.remoteVideoElement)
                self.view.sendSubview(toBack: self.modalShadeBackground)
                self.remoteVideoElement.frame = AVMakeRect(aspectRatio: (self.remoteVideoElement.layer.preferredFrameSize()), insideRect: self.remoteVideoElement.frame)
                self.remoteVideoElement.layoutSubviews()
            }, completion: nil)
        }
        isExpanded = !isExpanded
    }

Answer 1

我不确定 QBRTCRemoteVideoView 但我解决了视频流的类似问题通过获取我的视频图像的比例并将其转换为我的视频视图的矩形。基本上是这样的：

let xScale = maxImageDrawingArea.size.width / imageSize.width    
let yScale = maxImageDrawingArea.size.height / imageSize.height
let scaleFactor = xScale < yScale ? xScale : yScale;

然后通过

获取您的视图大小

let height = maxImageDrawingArea.size.height * scaleFactor
let width = maxImageDrawingArea.size.width * scaleFactor

然后使用此高度和宽度在您的案例 remoteVideoElement 中绘制视频支架

告诉我进展如何；

祝你好运，

Swift 3、iOS 10+、xCode 8.3+、Quickblox - 在保持纵横比 ratio/video 分辨率的同时切换全屏远程流

Swift 3, iOS 10+, xCode 8.3+, Quickblox - Toggle full screen remote stream while keeping aspect ratio/video res

ios

quickblox

swift3

xcode8

ios10.3