问题描述
已实现语音到文本功能,如果我正在对着麦克风讲话,该功能会很好用。但是我希望它能够从Apple Music中选择音频。 我正在使用MPMediaPickerController播放音频,并且音频播放完美。问题是它没有将其转换为文本。 这是我的代码: ''' func startRecording(){
// Clear all prevIoUs session data and cancel task
if recognitionTask != nil {
recognitionTask?.cancel()
recognitionTask = nil
}
// Create instance of audio session to record voice
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSession.Category.record,mode: AVAudioSession.Mode.measurement,options: AVAudioSession.CategoryOptions.duckOthers)
try audioSession.setActive(true,options: .notifyOthersOnDeactivation)
} catch {
print("audioSession properties weren't set because of an error.")
}
self.recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
let inputNode = audioEngine.inputNode
guard let recognitionRequest = recognitionRequest else {
fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
}
// Keep speech recognition data on device
if #available(iOS 13,*) {
recognitionRequest.requiresOnDeviceRecognition = true
}
recognitionRequest.shouldReportPartialResults = true
self.recognitionTask = speechRecognizer?.recognitionTask(with: recognitionRequest,resultHandler: { (result,error) in
var isFinal = false
if result != nil {
self.timer.invalidate()
if self.count == 0 {
self.textView.text = result!.bestTranscription.formattedString
} else {
self.textView.text = self.text + result!.bestTranscription.formattedString
}
isFinal = (result?.isFinal)!
}
else if result == nil || !isFinal {
self.textView.text = "Press record button and say something,I'm listening!"
}
if isFinal {
// this is to remove 1 minute limit.
self.count = self.count + 1
self.text = self.textView.text
self.timer = Timer.scheduledTimer(timeInterval: TimeInterval(1),target: self,selector: #selector(self.againStartRec),userInfo: nil,repeats: false)
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
self.recognitionRequest = nil
self.recognitionTask = nil
isFinal = false
self.MicButton.isEnabled = true
}
if error != nil {
URLCache.shared.removeAllCachedResponses()
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
guard let task = self.recognitionTask else { return }
task.cancel()
task.finish()
}
})
audioEngine.reset()
inputNode.removeTap(onBus: 0)
let recordingFormat = inputNode.outputFormat(forBus: 0)
inputNode.installTap(onBus: 0,bufferSize: 1024,format: recordingFormat) { (buffer: AVAudioPCMBuffer,when: AVAudioTime) in
self.analyzer.analyze(buffer,atAudioFramePosition: when.sampleTime)
self.recognitionRequest?.append(buffer)
}
self.audioEngine.prepare()
do {
try self.audioEngine.start()
} catch {
print("audioEngine Couldn't start because of an error.")
}
}
'''
解决方法
我找到了答案,如果将来有人需要,请在这里提及。 因此,我使用的是SFSpeechAudioBufferRecognitionRequest()而不是SFSpeechURLRecognitionRequest()。 如果要从设备中选择媒体,则需要获取所选音频文件的url,并将其传递给SFSpeechURLRecognitionRequest(url:audioURL)。这对我有用。