better_audio_capture

A simple audio capture for Flutter.

Install Started

1. Add this to your pubspec.yaml file:

dependencies:
  better_audio_capture: ^0.1.1

2. Install it

$ flutter packages get

Normal usage

  CupertinoButton(
    child: Text("start capture"),
    onPressed: () async {
      bytesBuilder.clear();

      // request audio session
      final session = await AudioSession.instance;
      await session.configure(AudioSessionConfiguration(
        avAudioSessionCategory: AVAudioSessionCategory.record,
        avAudioSessionMode: AVAudioSessionMode.measurement,
        avAudioSessionRouteSharingPolicy: AVAudioSessionRouteSharingPolicy.defaultPolicy,
        avAudioSessionSetActiveOptions: AVAudioSessionSetActiveOptions.none,
      ));

      if (await session.setActive(true)) {
        subscription = betterAudioCapture?.pcmStream.listen((event) {
          bytesBuilder.add(event);
          print("recording");
        });

        betterAudioCapture?.init(sampleRate: 16000, channelCount: 1);
        betterAudioCapture?.startCapture();
      }
    });
    },
  ),

  CupertinoButton(
    child: Text("stop capture"),
    onPressed: () async {
      subscription?.cancel();
      betterAudioCapture.stopCapture();
      betterAudioCapture.dispose();

      Directory tempDir = await getTemporaryDirectory();
      File waveFile = File(tempDir.path + "/record.wav");
      if (waveFile.existsSync()) {
        waveFile.deleteSync();
      }

      IOSink waveFileSink = waveFile.openWrite();
      waveFileSink.add(BetterAudioCapture.waveHeader(bytesBuilder.length));
      waveFileSink.add(bytesBuilder.takeBytes());
      await waveFileSink.close();
    },
  ),

Feature

• x Audio capture by microphone.
• x Set audio stream sampleRate.
• x Set audio stream channelNumber.