[HELP] Does anyone know a media format which can be recorded and played on both android and iOS in this package?

[kbanta11]

Up until recently, I was able to use the WellKnownMediaFormats.adtsAac to record audio that would be playable on both Android and iOS (after being uploaded to firebase). Recently, it seems audio recorded on Android has changed slightly in format. The filetype in firebase used to be just simply audio/aac for both android and iOS recordings/uploads. However, recently, when recordings are made with sounds on Android, the are show as audio/X-HX-AAC-ADTS which cannot be played on iOS. Was there a change made to Android's media encoders/formats? Or is there another solution that a file can be both recorded and played back on iOS and Android?

[kbanta11]

I created a custom media format that seems to work saving the files as mp4's:

class CustomMediaFormat extends NativeMediaFormat {
  /// ctor
  const CustomMediaFormat({
    int sampleRate = 16000,
    int numChannels = 1,
    int bitRate = 16000,
  }) : super.detail(
    name: 'aac',
    sampleRate: 16000,
    numChannels: 1,
    bitRate: 16000,
  );

  @override
  String get extension => 'aac';

  // Whilst the actual index is MediaRecorder.AudioEncoder.AAC (3)
  @override
  int get androidEncoder => 3;

  /// MediaRecorder.OutputFormat.MP4
  @override
  int get androidFormat => 2;

  /// kAudioFormatMPEG4AAC
  @override
  int get iosFormat => 1633772320;
}