Audio recording not saving to iphone

Please provide the following:

  1. SDK Version: 37.0.3
  2. Platforms(Android/iOS/web/all): iOS

Hi all,

In my app, I am trying to save an audio recording made through the phone microphone.
I am testing it in a physical iphone 7 plus.
_recordAudio() and _stopAudio() are executed with an onPress method of two seperate buttons (omitted here)

Here is the relevant code:

this.recording = null

_stopAudio = async () => {
    Alert.alert("Note", "You are now STOPPED recording.")
    this.setState({isrecording: false})
    await this.recording.stopAndUnloadAsync();
    const info = await FileSystem.getInfoAsync(this.recording.getURI());
    const audiofile = await MediaLibrary.createAssetAsync(this.recording.getURI());
    MediaLibrary.createAlbumAsync('abc-files', audiofile).then(() => {
    }).catch((error) => {

  _playaudio = async (uril) => {
    s = {}
    s.uri = uril
    const soundObject = new Audio.Sound();
    await soundObject.loadAsync(s);

  _recordAudio = async () => {
    Alert.alert("Note", "You are now recording.")
    const recording = new Audio.Recording();
    try {
      await Audio.setIsEnabledAsync(true)
      await Audio.setAudioModeAsync({playsInSilentModeIOS: true, allowsRecordingIOS: true})
      await recording.prepareToRecordAsync()
      await recording.startAsync();
      this.setState({isrecording: true})
      this.recording = recording
    // You are now recording!
    } catch (error) {
        console.log("error at recoding:")
        this.setState({isrecording: false})

When the _stopAudio() function is executed it is supposed to stop and save the audio to ‘abc-files’ but i am getting the error:

[Unhandled promise rejection: Error: This file type is not supported yet]

This error occurs when i am trying to save the file using MediaLibrary (in _stopAudio() ). The file is a “.caf” file.

Note: _playAudio() works fine and i can hear my recording when it is called from _stopAudio() , so my caf audio file is fine.

The permissions i am asking for is: Permissions.AUDIO_RECORDING and Permissions.CAMERA_ROLL and are being granted before render.
I have checked the variables in this.state at each point and it is as it should be.

This works on Andriod (Pixel 2 and 3)
Any help would be appreciated as i am new to this sort of thing.

1 Like

Faced the same problem! This topic describes a similar situation, but unfortunately unanswered.

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I had a look at the expo-media-library on github and tried to see where the error is thrown:

To the best of my understanding, it seems to be here (Line 130):

  PHAssetMediaType assetType = [EXMediaLibrary _assetTypeForUri:localUri];
  if (assetType == PHAssetMediaTypeUnknown || assetType == PHAssetMediaTypeAudio) {
    reject(@"E_UNSUPPORTED_ASSET", @"This file type is not supported yet", nil);

So if the Mediatype is unknown or Audio it will throw the error ‘This file type is not supported yet’ ?

Does anyone know why that is, is it an iOS thing?

are you able to solve this?

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