javascript - 如何在本机反应中将录制的音频转换为base64字符串

Question

这是我的代码，我想将此录制的音频（存储在这里 file:///sdcard/hello.mp4）转换为 base64 字符串。

const path = Platform.select({
        ios: 'hello.m4a',
        android: 'sdcard/hello.mp4', // should give extra dir name in android. Won't grant permission to the first level of dir.
      });
      const audioSet = {
        AudioEncoderAndroid: AudioEncoderAndroidType.AAC,
        AudioSourceAndroid: AudioSourceAndroidType.MIC,
        AVEncoderAudioQualityKeyIOS: AVEncoderAudioQualityIOSType.high,
        AVNumberOfChannelsKeyIOS: 2,
        AVFormatIDKeyIOS: AVEncodingOption.aac,
      };
    //   const result = await audioRecorderPlayer.startRecord(path);
     const result = await audioRecorderPlayer.startRecorder(path,audioSet);
    audioRecorderPlayer.addRecordBackListener((e) => {
        console.log('listning');
            console.log(e)
            setRecordSecs(`${e.current_position}`);
            setRecordTime(audioRecorderPlayer.mmssss(Math.floor(e.current_position)));
        return;
    });
    console.log("start result =====: ",getUriToBase64(result));
};