react-native audio sending issue

Question

I am trying to send an audio file but I think I am not selecting the file correctly. I am using react-native-audio-toolkit and I was trying to use the rec object where it records, but that does not seem to work, how could I get the file to send it? code:

let rec = new Recorder("filename.mp4").record();

// Stop recording after approximately 3 seconds
setTimeout(() => {
  rec.stop(err => {
    // NOTE: In a real situation, handle possible errors here
    let data = new FormData();
    data.append("recording[path_to_recording]", rec);
    data.append("recording[challenge_id]", 1);
    data.append("recording[user_id]", 1);
    console.log(data);
    axios
      .post(config.API_URL + "recordings", data, {
        headers: {
          Authorization: "Bearer " + this.props.auth.token
        }
      })
      .then(res => res.data);

the log of the recording file looks like this:

Recorder {_path: "filename.mp4", _options: {…}, _recorderId: 0, _state: -2, _duration: -1, …} _duration : -1 _fsPath : "/data/user/0/com.cobrn/files/filename.mp4" _lastSync : -1 _options : autoDestroy : (...) get autoDestroy : ƒ () set autoDestroy : ƒ () proto : Object _path : "filename.mp4" _position : -1 _recorderId : 0 _state : -2 canPrepare : (...) canRecord : (...) fsPath : (...) isPrepared : (...) isRecording : (...) state : (...) proto : EventEmitter

Answer 1

figured it out, you need the specify the type

data.append("recording[path_to_recording]", {
      uri: "file://" + rec._fsPath,
      name: "filename.mp4",
      type: "audio/mp4"
    });