startPlayerFromBuffer failure

Version of flutter_sound

2.1.1

flutter doctor

[✓] Flutter (Channel dev, v1.15.3, on Linux, locale en_US.UTF-8)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2) [✓] Android Studio (version 3.6) [✓] VS Code (version 1.42.1) [✓] Connected device (1 available)

• No issues found!

Platforms you faced the error (IOS or Android or both?)

Android 9

Expected behavior

Play sound from a flutter asset.

Actual behavior

PlatformException(ERR_UNKNOWN, ERR_UNKNOWN, Prepare failed.: status=0x1)

Tested environment (Emulator? Real Device?)

Real device, Poco F1 with OmniROM

Steps to reproduce the behavior

I was trying to play an audio file from a small asset. The temporary file created in the Java backend is not world readable, so Android cannot prepare the playback session.

  Future<void> _playBeep(BuildContext context) async {
    final beep = await DefaultAssetBundle.of(context).load('assets/scanner_beep.ac3');
    final flutterSound = new FlutterSound();
    final playback = new Completer.sync();
    await flutterSound.startPlayerFromBuffer(beep.buffer.asUint8List(), codec: t_CODEC.CODEC_AAC);
    final subscription = flutterSound.onPlayerStateChanged.listen((event) {
      if (event == null) {
        return;
      }
      if (event.currentPosition == event.duration) {
        playback.complete();
      }
    });
    await playback.future;
    subscription.cancel();
  }

[wigy-opensource-developer]

Sorry, I doubt I can help you in your problem. I made this experiment a year ago and I was not really happy with what I found about Android codec support and the specificity of error codes. If you are planning to integrate conversion into your application, the ffmpeg library is a good place to start with.

[jigarfumakiya]

Thanks for the info. @wigy-opensource-developer