PlatformException(record, Failed to start recording, Format conversion is not possible., null)

[mattpodolak]

Package version
6.1.2

Environment

• OS: ios

Describe the bug

Trying to resume recording and i keep getting this error preventing me from being able to record again. It only happens after I've been recording for a bit and then stop, and maybe do this a couple times, and then it breaks and is unresumable.

    return RecordConfig(
      encoder: AudioEncoder.pcm16bits,
      sampleRate: sampleRate,
      numChannels: 1,
      androidConfig: const AndroidRecordConfig(
        manageBluetooth: true,
        audioSource: AndroidAudioSource.defaultSource,
        audioManagerMode: AudioManagerMode.modeNormal,
      ),
      iosConfig: const IosRecordConfig(
        categoryOptions: [
          IosAudioCategoryOption.allowBluetooth,
          IosAudioCategoryOption.allowBluetoothA2DP,
          IosAudioCategoryOption.defaultToSpeaker,
        ],
      ),
    );

NOTE: i also use a managed audio session with these settings:

    _session = await AudioSession.instance;
    await _session.configure(
      AudioSessionConfiguration(
        avAudioSessionCategory: AVAudioSessionCategory.playAndRecord,
        avAudioSessionCategoryOptions:
            AVAudioSessionCategoryOptions.mixWithOthers |
                AVAudioSessionCategoryOptions.allowBluetooth,
        avAudioSessionMode:
            AVAudioSessionMode.spokenAudio,
        androidAudioAttributes: const AndroidAudioAttributes(
          usage: AndroidAudioUsage.voiceCommunication,
          contentType: AndroidAudioContentType.speech,
        ),
      ),

To Reproduce

Steps to reproduce the behavior:

    final config = _buildRecordConfig(sampleRate);
    Stream<Uint8List> stream;

    try {
      stream = await _audioRecorder.startStream(config);
    } catch (e, stack) {
      logger.severe('Failed to start audio recorder stream');
      logger.severe('Error: $e');
      logger.severe('Stack trace: $stack');
      await _stopRecorderStream(state);
      rethrow;
    }

Expected behavior

I expect to be able to resume a recording, this worked with flutter sound, exact same setup - I've only started seeing this issue after switching to your package.

Additional context

Add any other context about the problem here.

[mattpodolak]

seems to be an interaction between avAudioSessionCategory: AVAudioSessionCategory.playAndRecord, and the flutter camera package

when i switch to the camera and try to start recording, i get the error. changing to AVAudioSessionCategory.record fixed the issue

camera settings:

CameraController(
        _backCameras[cameraIndex],
        ResolutionPreset.veryHigh,
        enableAudio: false,
      );

[llfbandit]

Thanks for the feedback. So can we close this issue?

[mattpodolak]

I didnt have this problem with flutter sound using the playAndRecord audio session settings that caused an issue with the record package - could there be an issue? or is it something else?

let me know if u need me to send any code for this