回答編集履歴
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サンプルコードを貼りました。
answer
CHANGED
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@@ -5,4 +5,154 @@
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同様に
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AVCaptureAudioDataOutput, AVCaptureAudioDataOutputSampleBufferDelegate
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で音声もキャプチャしてみると良いかと思います。
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で音声もキャプチャしてみると良いかと思います。
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ソースコード一式を貼ります。
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```swift
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import UIKit
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import AVFoundation
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final class ViewController: UIViewController {
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// MARK: - private properties
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private var isRecording = false
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private var session = AVCaptureSession()
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private let videoOutput = AVCaptureVideoDataOutput()
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private let audioOutput = AVCaptureAudioDataOutput()
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private let fileUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("test").appendingPathExtension("mov")
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private var assetWriter: AVAssetWriter?
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private var startTime: CMTime?
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// MARK: - lifecycle
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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AVCaptureDevice.requestAccess(for: .video) { _ in
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AVCaptureDevice.requestAccess(for: .audio) { _ in
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self.setupCaptureSession()
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}
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}
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}
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// MARK: - private functions
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private func setupCaptureSession() {
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session.sessionPreset = .hd1280x720
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guard
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let videoDevice = AVCaptureDevice.default(for: .video),
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let audioDevice = AVCaptureDevice.default(for: .audio),
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let videoInput = try? AVCaptureDeviceInput(device: videoDevice),
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let audioInput = try? AVCaptureDeviceInput(device: audioDevice) else {
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fatalError()
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}
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session.beginConfiguration()
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session.addInput(videoInput)
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session.addInput(audioInput)
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session.addOutput(videoOutput)
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session.addOutput(audioOutput)
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session.commitConfiguration()
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DispatchQueue.main.async {
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let previewView = PreviewView()
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previewView.videoPreviewLayer.session = self.session
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previewView.frame = self.view.bounds
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previewView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
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self.view.insertSubview(previewView, at: 0)
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self.session.startRunning()
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}
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}
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@IBAction private func onClickButton(_ sender: Any) {
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if isRecording {
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isRecording = false
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finishRecording()
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} else {
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isRecording = true
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startRecording()
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}
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}
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private func startRecording() {
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try? FileManager.default.removeItem(at: fileUrl)
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assetWriter = try! AVAssetWriter(outputURL: fileUrl, fileType: .mov)
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// video
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let videoInput = AVAssetWriterInput(mediaType: .video, outputSettings: [
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AVVideoCodecKey : AVVideoCodecType.h264,
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AVVideoWidthKey : 1280,
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AVVideoHeightKey : 720
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])
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videoInput.expectsMediaDataInRealTime = true
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assetWriter?.add(videoInput)
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// audio
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let audioInput = AVAssetWriterInput(mediaType: .audio, outputSettings: nil)
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audioInput.expectsMediaDataInRealTime = true
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assetWriter?.add(audioInput)
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assetWriter?.startWriting()
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let queue = DispatchQueue.global()
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videoOutput.setSampleBufferDelegate(self, queue: queue)
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audioOutput.setSampleBufferDelegate(self, queue: queue)
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}
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private func finishRecording() {
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videoOutput.setSampleBufferDelegate(nil, queue: nil)
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audioOutput.setSampleBufferDelegate(nil, queue: nil)
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startTime = nil
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assetWriter?.finishWriting {
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guard self.assetWriter!.status == .completed else { fatalError("failed recording") }
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DispatchQueue.main.async {
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let activity = UIActivityViewController(activityItems: [self.fileUrl], applicationActivities: nil)
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self.present(activity, animated: true)
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}
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}
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}
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}
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extension ViewController: AVCaptureVideoDataOutputSampleBufferDelegate, AVCaptureAudioDataOutputSampleBufferDelegate {
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func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
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guard isRecording else { fatalError() }
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guard CMSampleBufferDataIsReady(sampleBuffer) else {
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print("not ready")
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return
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}
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if startTime == nil {
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startTime = CMSampleBufferGetPresentationTimeStamp(sampleBuffer)
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assetWriter?.startSession(atSourceTime: startTime!)
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}
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let mediaType: AVMediaType = output is AVCaptureVideoDataOutput ? .video : .audio
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let input = assetWriter!.inputs.filter { $0.mediaType == mediaType }.first!
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if input.isReadyForMoreMediaData {
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print("append (mediaType.rawValue)")
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input.append(sampleBuffer)
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}
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}
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}
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private class PreviewView: UIView {
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override class var layerClass: AnyClass {
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return AVCaptureVideoPreviewLayer.self
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}
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var videoPreviewLayer: AVCaptureVideoPreviewLayer {
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return layer as! AVCaptureVideoPreviewLayer
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}
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}
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```
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