录制视频并同时播放音频ios [英] Record Video and play audio at same time ios
问题描述
我想同时录制视频和播放音频.当开始录制视频时，预加载的音频开始播放，而当停止录制视频时，音频也停止播放.
我试图通过使用第三方库" SwiftyCam "( https://github.com/Awalz/SwiftyCam )，并在开始写入视频录制文件时以委托方法开始播放音频.
ViewCOntroller的主要代码如下:
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
var temp = Data()
let audioPath = Bundle.main.path(forResource: "ab1-FAST", ofType: "mp3")
temp = FileManager.default.contents(atPath: (audioPath)!)!
do {
player = try AVAudioPlayer(data: temp)
}
catch let error {
print(error)
}
self.configureAudioSession()
player!.delegate = self
self.player!.prepareToPlay()
}
// MARK: -
// MARK: - SwiftyCamViewControllerDelegate method
func swiftyCam(_ swiftyCam: SwiftyCamViewController, didBeginRecordingVideo camera: SwiftyCamViewController.CameraSelection) {
self.player?.play()
}
func swiftyCam(_ swiftyCam: SwiftyCamViewController, didFinishRecordingVideo camera: SwiftyCamViewController.CameraSelection)
{
if self.player != nil{
if (self.player?.isPlaying)! {
self.player?.stop()
}
}
}
@IBAction func btnStartStopClick(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
if sender.isSelected{
DispatchQueue.main.async {
self.objVideoRecorderVC.startVideoRecording()
}
}else{
self.objVideoRecorderVC.stopVideoRecording()
}
}
swiftycam库:
/**
Begin recording video of current session
SwiftyCamViewControllerDelegate function SwiftyCamDidBeginRecordingVideo() will be called
*/
public func startVideoRecording() {
guard let movieFileOutput = self.movieFileOutput else {
return
}
if currentCamera == .rear && flashEnabled == true {
enableFlash()
}
if currentCamera == .front && flashEnabled == true {
flashView = UIView(frame: view.frame)
flashView?.backgroundColor = UIColor.white
flashView?.alpha = 0.85
previewLayer.addSubview(flashView!)
}
sessionQueue.async { [unowned self] in
if !movieFileOutput.isRecording {
if UIDevice.current.isMultitaskingSupported {
self.backgroundRecordingID = UIApplication.shared.beginBackgroundTask(expirationHandler: nil)
}
// Update the orientation on the movie file output video connection before starting recording.
let movieFileOutputConnection = self.movieFileOutput?.connection(withMediaType: AVMediaTypeVideo)
//flip video output if front facing camera is selected
if self.currentCamera == .front {
movieFileOutputConnection?.isVideoMirrored = true
}
movieFileOutputConnection?.videoOrientation = self.getVideoOrientation()
// Start recording to a temporary file.
let outputFileName = UUID().uuidString
let outputFilePath = (NSTemporaryDirectory() as NSString).appendingPathComponent((outputFileName as NSString).appendingPathExtension("mov")!)
movieFileOutput.startRecording(toOutputFileURL: URL(fileURLWithPath: outputFilePath), recordingDelegate: self)
self.isVideoRecording = true
DispatchQueue.main.async {
self.cameraDelegate?.swiftyCam(self, didBeginRecordingVideo: self.currentCamera)
}
}
else {
movieFileOutput.stopRecording()
}
}
}
问题:有时会延迟一微秒开始播放音频. 当音频开始播放并在视频录制中录制声音时，可能需要一些时间才能正确同步，并且声音会延迟一段时间.
我用合并音频和原始音频进行检查，如下图所示，存在一些延迟.问题并非总是如此，而是随机延迟且不同步.
有什么解决办法吗? 如何同时开始录制视频和播放音频(单击一次按钮)，并且没有延迟，也没有同步问题? 还有其他方法吗?
用于播放音频:AVAudioPlayer
使用的录制视频:Swiftycam(AVCaptureSession)
您可以尝试以下几种方法:
1)在后台队列上播放音频:
dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)) {
self.player.play()
}
2)将viewDidAppear中的代码(包括prepareToPlay())移动到viewDidLoad.我认为这是个不太有用的建议，因为播放是由用户启动的，但是prepareToPlay()与音频准备就绪之间会有延迟.
如果尝试这些操作，但延迟仍然太大，则可能只需要使用AVAudioPlayer以外的其他内容，例如OpenAL.
I want to record video and play audio simultaneously. when start recording video, preloaded audio start play and when stop video recording, audio also stops playing.
I tried to record Video by using third party library "SwiftyCam" (https://github.com/Awalz/SwiftyCam) and start playing audio in delegate method when start writes video recording file.
main ViewCOntroller code is below :
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
var temp = Data()
let audioPath = Bundle.main.path(forResource: "ab1-FAST", ofType: "mp3")
temp = FileManager.default.contents(atPath: (audioPath)!)!
do {
player = try AVAudioPlayer(data: temp)
}
catch let error {
print(error)
}
self.configureAudioSession()
player!.delegate = self
self.player!.prepareToPlay()
}
// MARK: -
// MARK: - SwiftyCamViewControllerDelegate method
func swiftyCam(_ swiftyCam: SwiftyCamViewController, didBeginRecordingVideo camera: SwiftyCamViewController.CameraSelection) {
self.player?.play()
}
func swiftyCam(_ swiftyCam: SwiftyCamViewController, didFinishRecordingVideo camera: SwiftyCamViewController.CameraSelection)
{
if self.player != nil{
if (self.player?.isPlaying)! {
self.player?.stop()
}
}
}
@IBAction func btnStartStopClick(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
if sender.isSelected{
DispatchQueue.main.async {
self.objVideoRecorderVC.startVideoRecording()
}
}else{
self.objVideoRecorderVC.stopVideoRecording()
}
}
swiftycam Library :
/**
Begin recording video of current session
SwiftyCamViewControllerDelegate function SwiftyCamDidBeginRecordingVideo() will be called
*/
public func startVideoRecording() {
guard let movieFileOutput = self.movieFileOutput else {
return
}
if currentCamera == .rear && flashEnabled == true {
enableFlash()
}
if currentCamera == .front && flashEnabled == true {
flashView = UIView(frame: view.frame)
flashView?.backgroundColor = UIColor.white
flashView?.alpha = 0.85
previewLayer.addSubview(flashView!)
}
sessionQueue.async { [unowned self] in
if !movieFileOutput.isRecording {
if UIDevice.current.isMultitaskingSupported {
self.backgroundRecordingID = UIApplication.shared.beginBackgroundTask(expirationHandler: nil)
}
// Update the orientation on the movie file output video connection before starting recording.
let movieFileOutputConnection = self.movieFileOutput?.connection(withMediaType: AVMediaTypeVideo)
//flip video output if front facing camera is selected
if self.currentCamera == .front {
movieFileOutputConnection?.isVideoMirrored = true
}
movieFileOutputConnection?.videoOrientation = self.getVideoOrientation()
// Start recording to a temporary file.
let outputFileName = UUID().uuidString
let outputFilePath = (NSTemporaryDirectory() as NSString).appendingPathComponent((outputFileName as NSString).appendingPathExtension("mov")!)
movieFileOutput.startRecording(toOutputFileURL: URL(fileURLWithPath: outputFilePath), recordingDelegate: self)
self.isVideoRecording = true
DispatchQueue.main.async {
self.cameraDelegate?.swiftyCam(self, didBeginRecordingVideo: self.currentCamera)
}
}
else {
movieFileOutput.stopRecording()
}
}
}
issue: sometimes getting a delay in start playing audio in a microsecond. when audio start play and sound record in video recording some time sync proper and some time delay in sound.
I check it with merge audio with original audio and there is some delay as shown below image. the issue is not always but random delay and not sync.
are any solutions? how to do record video and play audio at the same time(on single button click) start and no delay and no sync issue? is any other way?
for play audio used: AVAudioPlayer
for record video used : Swiftycam (AVCaptureSession)
Couple thing you can try:
1) Play audio on the background queue:
dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)) {
self.player.play()
}
2) Move the code you have in viewDidAppear (including prepareToPlay()) to viewDidLoad. I assume this will be a less helpful suggestions since playing is user-initiated but there is a delay between prepareToPlay() and when your audio is ready.
If you try these and the delay is still too much, you simply might have to use something other than AVAudioPlayer, such as OpenAL.
这篇关于录制视频并同时播放音频ios的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
