如何使用AVCaptureVideoDataOutput处理错误并获取当前录制视频的大小？

let captureSession = AVCaptureSession()
let videoDataOutput = AVCaptureVideoDataOutput()

// 将videoDataOutput添加到captureSession中
if captureSession.canAddOutput(videoDataOutput) {
    captureSession.addOutput(videoDataOutput)
}

class VideoDataOutputDelegate: NSObject, AVCaptureVideoDataOutputSampleBufferDelegate {
    func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
        // 在这里处理视频帧数据
    }
}

let delegate = VideoDataOutputDelegate()
videoDataOutput.setSampleBufferDelegate(delegate, queue: DispatchQueue.main)

func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
    // 处理视频帧数据
    let videoFormatDescription = CMSampleBufferGetFormatDescription(sampleBuffer)
    let dimensions = CMVideoFormatDescriptionGetDimensions(videoFormatDescription)
    let videoWidth = dimensions.width
    let videoHeight = dimensions.height
    
    // 输出当前录制视频的大小
    print("当前录制视频大小：\(videoWidth) x \(videoHeight)")
}