【发布时间】：2017-08-23 13:40:43
【问题描述】：
我是 swift 的新手，也有股权溢出。高级感谢关注。 基本上我正在尝试构建一个自定义相机，它将用音频录制视频。这意味着当我播放此视频时，视频将播放有声。几天前，我试图构建这个定制相机。我已经按照我的教程进行了操作，但我的相机仍然遗漏了一些东西。我尝试按照我的自定义相机仅录制视频。也许它没有录制音频。我不明白。我正在寻找这个答案，没有找到合适的答案。
这就是我所做的
import UIKit
import AVFoundation
import SVProgressHUD
import MediaPlayer
import MobileCoreServices
import AVKit
var videoUrl = [AnyObject]()
class TestViewController: UIViewController {
@IBOutlet var viewVidioPlayer: UIView!
@IBOutlet weak var myView: UIView!
var session: AVCaptureSession?
var userreponsevideoData = NSData()
var userreponsethumbimageData = NSData()
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
}
// 这里我创建会话 func createSession() {
var input: AVCaptureDeviceInput?
let movieFileOutput = AVCaptureMovieFileOutput()
var prevLayer: AVCaptureVideoPreviewLayer?
prevLayer?.frame.size = myView.frame.size
session = AVCaptureSession()
let error: NSError? = nil
do {
input = try AVCaptureDeviceInput(device: self.cameraWithPosition(position: .front)!) } catch {return}
if error == nil {
session?.addInput(input)
} else {
print("camera input error: \(String(describing: error))")
}
prevLayer = AVCaptureVideoPreviewLayer(session: session)
prevLayer?.frame.size = myView.frame.size
prevLayer?.videoGravity = AVLayerVideoGravityResizeAspectFill
prevLayer?.connection.videoOrientation = .portrait
myView.layer.addSublayer(prevLayer!)
let documentsURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
let filemainurl = NSURL(string: ("\(documentsURL.appendingPathComponent("temp"))" + ".mp4"))
let maxDuration: CMTime = CMTimeMake(600, 10)
movieFileOutput.maxRecordedDuration = maxDuration
movieFileOutput.minFreeDiskSpaceLimit = 1024 * 1024
if self.session!.canAddOutput(movieFileOutput) {
self.session!.addOutput(movieFileOutput)
}
session?.startRunning()
movieFileOutput.startRecording(toOutputFileURL: filemainurl! as URL, recordingDelegate: self)
}
func cameraWithPosition(position: AVCaptureDevicePosition) -> AVCaptureDevice? {
let devices = AVCaptureDevice.devices(withMediaType: AVMediaTypeVideo)
for device in devices! {
if (device as AnyObject).position == position {
return device as? AVCaptureDevice
}
}
return nil
}
@IBAction func pressbackbutton(sender: AnyObject) {
session?.stopRunning()
}
@IBAction func Record(_ sender: Any) {
createSession()
}
@IBAction func play(_ sender: Any) {
self.videoPlay()
}
func videoPlay()
{
let documentsUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
do {
// Get the directory contents urls (including subfolders urls)
let directoryContents = try FileManager.default.contentsOfDirectory(at: documentsUrl, includingPropertiesForKeys: nil, options: [])
print(directoryContents)
// if you want to filter the directory contents you can do like this:
videoUrl = directoryContents.filter{ $0.pathExtension == "mp4" } as [AnyObject]
print("mp3 urls:",videoUrl)
let playerController = AVPlayerViewController()
playerController.delegate = self as? AVPlayerViewControllerDelegate
let movieURL = videoUrl[0]
print(movieURL)
let player = AVPlayer(url: movieURL as! URL)
playerController.player = player
self.addChildViewController(playerController)
self.view.addSubview(playerController.view)
playerController.view.frame = self.view.frame
player.play()
player.volume = 1.0
player.rate = 1.0
} catch let error as NSError {
print(error.localizedDescription)
}
}
}
扩展TestViewController：AVCaptureFileOutputRecordingDelegate {
@available(iOS 4.0, *)
private func captureOutput(captureOutput: AVCaptureFileOutput!, didStartRecordingToOutputFileAtURL fileURL: URL!, fromConnections connections: [AnyObject]!) {
print(fileURL)
}
func capture(_ captureOutput: AVCaptureFileOutput!, didFinishRecordingToOutputFileAt outputFileURL: URL!, fromConnections connections: [Any]!, error: Error!) {
let filemainurl = outputFileURL
do
{
let asset = AVURLAsset(url: filemainurl! as URL, options: nil)
//AVURLAsset(URL: filemainurl as! URL, options: nil)
print(asset)
let imgGenerator = AVAssetImageGenerator(asset: asset)
imgGenerator.appliesPreferredTrackTransform = true
let cgImage = try imgGenerator.copyCGImage(at: CMTimeMake(0, 1), actualTime: nil)
let uiImage = UIImage(cgImage: cgImage)
userreponsethumbimageData = try NSData(contentsOf: filemainurl! as URL)
print(userreponsethumbimageData.length)
print(uiImage)
// imageData = UIImageJPEGRepresentation(uiImage, 0.1)
}
catch let error as NSError
{
print(error)
return
}
SVProgressHUD.show(with: SVProgressHUDMaskType.clear)
let VideoFilePath = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("mergeVideo\(arc4random()%1000)d")!.appendingPathExtension("mp4").absoluteString
if FileManager.default.fileExists(atPath: VideoFilePath)
{
do
{
try FileManager.default.removeItem(atPath: VideoFilePath)
}
catch { }
}
let tempfilemainurl = NSURL(string: VideoFilePath)!
let sourceAsset = AVURLAsset(url: filemainurl! as URL, options: nil)
let assetExport: AVAssetExportSession = AVAssetExportSession(asset: sourceAsset, presetName: AVAssetExportPresetMediumQuality)!
assetExport.outputFileType = AVFileTypeQuickTimeMovie
assetExport.outputURL = tempfilemainurl as URL
assetExport.exportAsynchronously { () -> Void in
switch assetExport.status
{
case AVAssetExportSessionStatus.completed:
DispatchQueue.main.async(execute: {
do
{
SVProgressHUD .dismiss()
self.userreponsevideoData = try NSData(contentsOf: tempfilemainurl as URL, options: NSData.ReadingOptions())
print("MB - \(self.userreponsevideoData.length) byte")
}
catch
{
SVProgressHUD .dismiss()
print(error)
}
})
case AVAssetExportSessionStatus.failed:
print("failed \(assetExport.error)")
case AVAssetExportSessionStatus.cancelled:
print("cancelled \(assetExport.error)")
default:
print("complete")
SVProgressHUD .dismiss()
}
}
}
}
这就是我所做的一切。所以我不明白这段代码缺少什么。为什么音频不能和视频一起播放，或者为什么不能用视频重新编码音频。
【问题讨论】：
标签： ios swift camera avfoundation video-recording