just_audio 0.5.0

Flutter Android iOS web

Flutter plugin to play audio from streams, files, assets, DASH/HLS streams and playlists. Works with audio_service to play audio in the background.

just_audio #

This Flutter plugin plays audio from URLs, files, assets, DASH/HLS streams and playlists. Furthermore, it can clip, concatenate, loop, shuffle and compose audio into complex arrangements with gapless playback. This plugin can be used with audio_service to play audio in the background and control playback from the lock screen, Android notifications, the iOS Control Center, and headset buttons.

Features #

FeatureAndroidiOSmacOSWeb
read from URL
read from file
read from asset
request headers
DASH
HLS
buffer status/position
play/pause/seek
set volume
set speed
clip audio
playlists
looping
shuffle
compose audio
gapless playback
report player errors
Handle phonecall interruptions

Please consider reporting any bugs you encounter here or submitting pull requests here.

Example #

just_audio

Initialisation:

final player = AudioPlayer();
var duration = await player.setUrl('https://foo.com/bar.mp3');
var duration = await player.setFilePath('/path/to/file.mp3');
var duration = await player.setAsset('path/to/asset.mp3');

Standard controls:

player.play(); // Usually you don't want to wait for playback to finish.
await player.seek(Duration(seconds: 10));
await player.pause();

Clipping audio:

await player.setClip(start: Duration(seconds: 10), end: Duration(seconds: 20));
await player.play(); // Waits until the clip has finished playing

Adjusting audio:

await player.setSpeed(2.0); // Double speed
await player.setVolume(0.5); // Halve volume

Gapless playlists:

await player.load(
  ConcatenatingAudioSource(
    children: [
      AudioSource.uri(Uri.parse("https://example.com/track1.mp3")),
      AudioSource.uri(Uri.parse("https://example.com/track2.mp3")),
      AudioSource.uri(Uri.parse("https://example.com/track3.mp3")),
    ],
  ),
);
player.seekToNext();
player.seekToPrevious();
// Jump to the beginning of track3.mp3.
player.seek(Duration(milliseconds: 0), index: 2);

Looping and shuffling:

player.setLoopMode(LoopMode.off); // no looping (default)
player.setLoopMode(LoopMode.all); // loop playlist
player.setLoopMode(LoopMode.one); // loop current item
player.setShuffleModeEnabled(true); // shuffle except for current item

Composing audio sources:

player.load(
  // Loop child 4 times
  LoopingAudioSource(
    count: 4,
    // Play children one after the other
    child: ConcatenatingAudioSource(
      children: [
        // Play a regular media file
        ProgressiveAudioSource(Uri.parse("https://example.com/foo.mp3")),
        // Play a DASH stream
        DashAudioSource(Uri.parse("https://example.com/audio.mdp")),
        // Play an HLS stream
        HlsAudioSource(Uri.parse("https://example.com/audio.m3u8")),
        // Play a segment of the child
        ClippingAudioSource(
          child: ProgressiveAudioSource(Uri.parse("https://w.xyz/p.mp3")),
          start: Duration(seconds: 25),
          end: Duration(seconds: 30),
        ),
      ],
    ),
  ),
);

Releasing resources:

await player.dispose();

Catching player errors:

try {
  await player.setUrl("https://s3.amazonaws.com/404-file.mp3");
} catch (e) {
  print("Error: $e");
}

Listening to state changes:

player.playerStateStream.listen((state) {
  if (state.playing) ...  else ...
  switch (state.processingState) {
    case AudioPlaybackState.none: ...
    case AudioPlaybackState.loading: ...
    case AudioPlaybackState.buffering: ...
    case AudioPlaybackState.ready: ...
    case AudioPlaybackState.completed: ...
  }
});

// See also:
// - durationStream
// - positionStream
// - bufferedPositionStream
// - sequenceStateStream
// - sequenceStream
// - currentIndexStream
// - icyMetadataStream
// - playingStream
// - processingStateStream
// - loopModeStream
// - shuffleModeEnabledStream
// - volumeStream
// - speedStream
// - playbackEventStream

Configuring the audio session #

If your app uses audio, you should tell the operating system what kind of usage scenario your app has and how your app will interact with other audio apps on the device. Different audio apps often have unique requirements. For example, when a navigator app speaks driving instructions, a music player should duck its audio while a podcast player should pause its audio. Depending on which one of these three apps you are building, you will need to configure your app's audio settings and callbacks to appropriately handle these interactions.

just_audio will by default choose settings that are appropriate for a music player app which means that it will automatically duck audio when a navigator starts speaking, but should pause when a phone call or another music player starts. If you are building a podcast player or audio book reader, this behaviour would not be appropriate. While the user may be able to comprehend the navigator instructions while ducked music is playing in the background, it would be much more difficult to understand the navigator instructions while simultaneously listening to an audio book or podcast.

You can use the audio_session package to change the default audio session configuration for your app. E.g. for a podcast player, you may use:

final session = await AudioSession.instance;
await session.configure(AudioSessionConfiguration.speech());

Note: If your app uses a number of different audio plugins, e.g. for audio recording, or text to speech, or background audio, it is possible that those plugins may internally override each other's audio session settings, so it is recommended that you apply your own preferred configuration using audio_session after all other audio plugins have loaded. You may consider asking the developer of each audio plugin you use to provide an option to not overwrite these global settings and allow them be managed externally.

Platform specific configuration #

Android #

If you wish to connect to non-HTTPS URLS, add the following attribute to the application element of your AndroidManifest.xml file:

    <application ... android:usesCleartextTraffic="true">

If you need access to the player's AudioSession ID, you can listen to AudioPlayer.androidAudioSessionIdStream. Note that the AudioSession ID will change whenever you set new AudioAttributes.

iOS #

Regardless of whether your app uses the microphone, Apple will require you to add the following key to your Info.plist file. The message will simply be ignored if your app doesn't use the microphone:

<key>NSMicrophoneUsageDescription</key>
<string>... explain why you use (or don't use) the microphone ...</string>

If you wish to connect to non-HTTPS URLS, add the following to your Info.plist file:

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
    <key>NSAllowsArbitraryLoadsForMedia</key>
    <true/>
</dict>

macOS #

To allow your macOS application to access audio files on the Internet, add the following to your DebugProfile.entitlements and Release.entitlements files:

    <key>com.apple.security.network.client</key>
    <true/>

If you wish to connect to non-HTTPS URLS, add the following to your Info.plist file:

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
    <key>NSAllowsArbitraryLoadsForMedia</key>
    <true/>
</dict>

Web #

Add the package just_audio_web to the dependencies of your pubspec.yaml in addition to just_audio:

...
dependencies:
  ...
  just_audio: ...
  just_audio_web: ...
  ...
  • audio_service: play any audio in the background and control playback from the lock screen, Android notifications, the iOS Control Center, and headset buttons.
  • audio_session: configure your app's audio category (e.g. music vs speech) and configure how your app interacts with other audio apps (e.g. audio focus, ducking, mixing).
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Publisher

ryanheise.com

Flutter plugin to play audio from streams, files, assets, DASH/HLS streams and playlists. Works with audio_service to play audio in the background.

Homepage
Repository (GitHub)
View/report issues

Documentation

API reference

License

Apache 2.0 (LICENSE)

Dependencies

async, audio_session, flutter, just_audio_platform_interface, path, path_provider, rxdart, uuid

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