wav

Simple tools for reading and writing WAV files. Written in pure Dart, with no dependencies.

This package currently supports reading and writing 8/16/24/32 bit PCM, and 32/64 bit float formats. Other formats can be added as needed (just file a bug).

Usage

// Read a WAV file.
final wav = await Wav.readFile(filename);

// Look at its metadata.
print(wav.format);
print(wav.samplesPerSecond);

// Mess with its audio data.
for (final chan in wav.channels) {
  for (int i = 0; i < chan.length; ++i) {
    chan[i] /= 2;  // Decrease the volume.
  }
}

// Write to another WAV file.
await wav.writeFile(otherFilename);

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Comments

[BUG] WAV is corrupted or not a WAV File?

Hi, its me again :D

Thanks for package. Im not sure if its my side or your.

I'm recording voice by flutter_sound plugin and so my config looks like this:

SampleRate: 16000 Channels: 1 BitRate: 16000 Codec: PCM16

I can read later that file and display it but your package throws me error like below:

flutter: \^[[38;5;196m┌───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────<…>
flutter: \^[[38;5;196m│ \^[[0m\^[[39m\^[[48;5;196mFormatException: WAV is corrupted, or not a WAV file.<…>
flutter: \^[[38;5;196m├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄<…>
flutter: \^[[38;5;196m│ #0   TwLogger.e (package:tw_utils/logger/logger.dart:52:18)<…>
flutter: \^[[38;5;196m│ #1   main.<anonymous closure> (package:chat/main.dart:64:14)<…>
flutter: \^[[38;5;196m│ #2   _RootZone.runBinary (dart:async/zone.dart:1658:54)<…>
flutter: \^[[38;5;196m│ #3   runZonedGuarded.<anonymous closure> (dart:async/zone.dart:1800:18)<…>
flutter: \^[[38;5;196m│ #4   _Zone._processUncaughtError (dart:async/zone.dart:1073:14)<…>
flutter: \^[[38;5;196m│ #5   _CustomZone.handleUncaughtError (dart:async/zone.dart:1277:5)<…>
flutter: \^[[38;5;196m│ #6   Future._propagateToListeners (dart:async/future_impl.dart:680:16)<…>
flutter: \^[[38;5;196m│ #7   Future._completeError (dart:async/future_impl.dart:574:5)<…>
flutter: \^[[38;5;196m│ #8   _completeOnAsyncError (dart:async-patch/async_patch.dart:318:13)<…>
flutter: \^[[38;5;196m│ #9   _rootRunBinary (dart:async/zone.dart:1415:47)<…>
flutter: \^[[38;5;196m├┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄┄<…>
flutter: \^[[38;5;196m│ ⛔ ***** Main runZonedGuarded() --> ErrorHandler<…>
flutter: \^[[38;5;196m└───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────<…>

Link to example file recorded by flutter_sound uploaded to firestore - https://firebasestorage.googleapis.com/v0/b/tradewind-internal-f4761.appspot.com/o/voice_records%2Fvoice_2022-10-24T20%3A32%3A46.993797.wav?alt=media&token=e9891dc3-98b5-4592-9dfb-e112377dbae4

I would be grateful if you could tell me if that config is not supported or just my recorded files are corrupted. Thanks in advance!

EDIT 1:

We have found out that we should save files as pcm not wav. Do you know any way to achieve converting pcm to wav file?

opened by PcolBP 9