如何在Swift中同时录制音频和视频

在Swift中同时录制音频和视频，可以使用AVFoundation框架来实现。AVFoundation是苹果提供的一个强大的多媒体框架，可以用于处理音频和视频。

以下是在Swift中同时录制音频和视频的步骤：

导入AVFoundation框架：

import AVFoundation

创建AVCaptureSession对象，用于协调音频和视频的录制：

let captureSession = AVCaptureSession()

设置音频和视频的输入设备：

let audioDevice = AVCaptureDevice.default(for: .audio)
let videoDevice = AVCaptureDevice.default(for: .video)

do {
    let audioInput = try AVCaptureDeviceInput(device: audioDevice!)
    let videoInput = try AVCaptureDeviceInput(device: videoDevice!)

    if captureSession.canAddInput(audioInput) {
        captureSession.addInput(audioInput)
    }

    if captureSession.canAddInput(videoInput) {
        captureSession.addInput(videoInput)
    }
} catch {
    print("Error setting up audio/video input: \(error.localizedDescription)")
}

创建音频和视频的输出对象：

let audioOutput = AVCaptureAudioDataOutput()
let videoOutput = AVCaptureVideoDataOutput()

audioOutput.setSampleBufferDelegate(self, queue: DispatchQueue.global())
videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue.global())

if captureSession.canAddOutput(audioOutput) {
    captureSession.addOutput(audioOutput)
}

if captureSession.canAddOutput(videoOutput) {
    captureSession.addOutput(videoOutput)
}

实现AVCaptureVideoDataOutputSampleBufferDelegate和AVCaptureAudioDataOutputSampleBufferDelegate协议方法，用于处理音频和视频的数据：

extension ViewController: AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate {
    func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
        // 在这里处理音频和视频的数据
    }
}