Agora cannot record call with iOS Swift - ios

Question

I am following the doc here: https://docs.agora.io/en/Voice/rtc_recording_apple?platform=iOS and implementing a basic recording. This is my code:
func startRecording(){
let filename = getDocumentsDirectory().appendingPathComponent("\(APP_NAME)\(now()).WAV")
let str = String(describing: filename)
self.recordingPath = str
agoraKit?.startAudioRecording(str, quality: .high)
}
func stopRecording(){
agoraKit?.stopAudioRecording()
// get audio file
guard let audioUrl = URL(string: self.recordingPath) as? URL else { return }
DispatchQueue.main.asyncAfter(deadline: .now() + 2.0 ) { [weak self] in
// getdata
do {
let myData = try Data(contentsOf: audioUrl)
print(myData.count, myData)
} catch {
print(error)
}
}
}
private func getDocumentsDirectory() -> URL {
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
return paths[0]
}
But I am getting error: The file “Whisper1608949569.WAV” couldn’t be opened because there is no such file
Full message:
file:///var/mobile/Containers/Data/Application/1F682ABD-153C-4DFD-BFF4-
02C1CE6F9A4C/Documents/Whisper1608949569.WAV
Error Domain=NSCocoaErrorDomain Code=260 "The file “Whisper1608949569.WAV” couldn’t be opened because there is no such file." UserInfo={NSFilePath=/var/mobile/Containers/Data/Application/1F682ABD-153C-4DFD-BFF4-02C1CE6F9A4C/Documents/Whisper1608949569.WAV, NSUnderlyingError=0x281e33f60 {Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}
Am I not accessing the file correctly?
This is how I have initialized the agora client:
self.agoraKit = AgoraRtcEngineKit.sharedEngine(withAppId: AppID, delegate: self)
agoraKit?.delegate = self
agoraKit?.enableWebSdkInteroperability(true)
// sample loudest speaker every second
agoraKit?.enableAudioVolumeIndication(1000, smooth: 3, report_vad: true)
agoraKit?.enableAudio()
// config for livecast to start
agoraKit?.setChannelProfile(.liveBroadcasting)
// set framrate and HD/SD
agoraKit?.setVideoEncoderConfiguration( CONFIG_PRODUCTION )
//agoraKit?.setDefaultAudioRouteToSpeakerphone(true)

Answer 1

I just checked out the documentation referenced from the doc you're using and it says the method startAudioRecording(filepath, quality: quality) is now deprecated, and you should instead use this method with the additional sampleRate parameter:
https://docs.agora.io/en/Voice/API%20Reference/oc/Classes/AgoraRtcEngineKit.html#//api/name/startAudioRecording:sampleRate:quality:
Also check that the returned value of startAudioRecording and stopAudioRecording returns 0, meaning success.

Answer 2

If your channel name contains special characters (colons, slashes) recording will silently fail and no file will be produced.
It seems Agora uses the channel name when creating the temporary file.