Question

我正在一个需要录制视频的应用程序上工作，我发现了一个由appcoda编写的帮助程序类，这是指向github repo https://github.com/appcoda/FullScreenCamera的链接，但是我遇到的问题是它曾经有过我运行它，在控制台中收到一个错误，说private static File processImage(File img) throws IOException { File newImg = File.createTempFile("asdf", ".png"); ImageMagickCmd cmd = new ImageMagickCmd("convert"); IMOperation op = new IMOperation(); op.addImage(img.getAbsolutePath()); op.strip().resample(300).colorspace("gray").autoLevel().threshold(35000).type("bilevel").depth(8).trim(); op.addImage(newImg.getAbsolutePath()); cmd.run(op); return newImg; }后跟noCamerasAvailable，我还致力于改进代码，但我不知道为什么。这是助手类

captureSessionIsMissing

这是帮助程序类。

Answer 1

使用 .builtInWideAngleCamera 代替 .builtInDualCamera 来设置AVCaptureDevice。

在您的项目上替换此功能

func configureCaptureDevices() throws {

    let session = AVCaptureDevice.DiscoverySession(deviceTypes: [. builtInWideAngleCamera], mediaType: AVMediaType.video, position: .unspecified)

    let cameras = session.devices.compactMap { $0 }
    guard !cameras.isEmpty else { throw CameraHelperError.noCamerasAvailable }

    for camera in cameras {
        if camera.position == .front {
            self.frontCamera = camera
        }

        if camera.position == .back {
            self.rearCamera = camera

            try camera.lockForConfiguration()
            camera.focusMode = .continuousAutoFocus
            camera.unlockForConfiguration()
        }
    }
}

AVFoundation会议问题

1 个答案: