There are some problems with the screen recording app I made.
The main function is to use WebView to play audio, and then use
RPScreenRecorder.startCapture of ReplayKit to record video and audio of my app.
When I use "UIWebView", everything works well and video and audio can be recorded, but after changing it to "WKWebView", video can still be recorded but the recorded audio is always silence.
我所做的螢幕錄製存在一些問題。
主要功能是WebView播放音頻，然後通過replayKit api startCapture屏幕錄製。
當我使用“ UIWebView”時，“ AudioApp”可以錄製聲音，但是現在將其更改為“ WKWebView”後，“ AudioApp”錄到的聲音都是靜音。
replayKit api：
open func startCapture(handler captureHandler: ((CMSampleBuffer, RPSampleBufferType, Error?) -> Void)?, completionHandler: ((Error?) -> Void)? = nil)
Demo code：
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
let url = Bundle.main.url(forResource: "Media123", withExtension: "mp3")
self.playerView.loadHTMLString("<!DOCTYPE html><html><body><audio controls autoplay><source src=\"Media123.ogg\" type=\"audio/ogg\" /><source src=\"\(String(describing: url!.absoluteString))\" type=\"audio/mpeg\"></audio></body></html>", baseURL: url)
}
// MARK: - start ScreenRecording
func startScreenRecording() {
let sharedRecorder = RPScreenRecorder.shared()
if (sharedRecorder.isAvailable) {
if (!sharedRecorder.isRecording) {
if let pathString = self.getScreenRecordDirectoryPath() {
sharedRecorder.startCapture(handler: {
(sampleBuffer, sampleBufferType, error) in
switch(sampleBufferType) {
case .video:
NSLog("video")
self.append(sampleBuffer: sampleBuffer, sampleBufferType: sampleBufferType)
break
case .audioApp:
NSLog("audioApp = \(sampleBuffer)")
let data = self.converBufferToData(sampleBuffer: sampleBuffer)
NSLog("audioApp data = \(data)")
NSLog("audioApp data = \([UInt8] (data))")
self.append(sampleBuffer: sampleBuffer, sampleBufferType: sampleBufferType)
break
case .audioMic:
NSLog("audioMic")
break
@unknown default:
break
}
}, completionHandler: {
(error) in
if let error = error {
NSLog("startCapture completionHandler error = \(error)")
} else {
do {
try self.startWriting(outputFilePathString: pathString)
} catch let error {
NSLog("startWriting error = \(error)")
}
}
})
} else {
self.showSimpleAlert(viewController: self, title: NSLocalizedString("Screen Recording", comment: ""), message: "Path Error", buttonTitle: NSLocalizedString("OK", comment: ""))
}
} else {
self.showSimpleAlert(viewController: self, title: NSLocalizedString("Screen Recording", comment: ""), message: NSLocalizedString("Already Recording", comment: ""), buttonTitle: NSLocalizedString("OK", comment: ""))
}
} else {
self.showSimpleAlert(viewController: self, title: NSLocalizedString("Screen Recording", comment: ""), message: NSLocalizedString("Unavailable Record", comment: ""), buttonTitle: NSLocalizedString("OK", comment: ""))
}
}
Print out the result：
audioApp data = 4096 bytes
audioApp data = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,．．．．