java - exoplayer 2.11.* 版本在 android 5.0/5.1(Lollipop) 设备中引发渲染器错误

Question

我正在使用 exoplayer用于从 firebase storage 流式传输我的音频文件到我的安卓应用程序。 exoplayer在 >= 6.0 的 android 版本中效果很好.但是在 Android 5.0/5.1(Lollipop)设备，exoplayer给我一个 Renderer error .
这是我得到的错误:

E/AudioTrack: AudioFlinger could not create track, status: -12
E/AudioTrack-JNI: Error -12 initializing AudioTrack
E/android.media.AudioTrack: Error code -20 when initializing AudioTrack.
E/ExoPlayerImplInternal: Renderer error: index=1, type=audio, format=Format(null, null, null, audio/mpeg, null, -1, null, [-1, -1, -1.0], [2, 32000]), rendererSupport=YES
      com.google.android.exoplayer2.ExoPlaybackException: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed: 0, Config(32000, 12, 32000)
        at com.google.android.exoplayer2.BaseRenderer.createRendererException(BaseRenderer.java:359)
        at com.google.android.exoplayer2.audio.MediaCodecAudioRenderer.processOutputBuffer(MediaCodecAudioRenderer.java:831)
        at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.drainOutputBuffer(MediaCodecRenderer.java:1590)
        at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.render(MediaCodecRenderer.java:721)
        at com.google.android.exoplayer2.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:599)
        at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:329)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:135)
        at android.os.HandlerThread.run(HandlerThread.java:61)
     Caused by: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed: 0, Config(32000, 12, 32000)
        at com.google.android.exoplayer2.audio.DefaultAudioSink$Configuration.buildAudioTrack(DefaultAudioSink.java:1428)
        at com.google.android.exoplayer2.audio.DefaultAudioSink.initialize(DefaultAudioSink.java:527)
        at com.google.android.exoplayer2.audio.DefaultAudioSink.handleBuffer(DefaultAudioSink.java:608)
        at com.google.android.exoplayer2.audio.MediaCodecAudioRenderer.processOutputBuffer(MediaCodecAudioRenderer.java:824)
        at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.drainOutputBuffer(MediaCodecRenderer.java:1590) 
        at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.render(MediaCodecRenderer.java:721) 
        at com.google.android.exoplayer2.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:599) 
        at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:329) 
        at android.os.Handler.dispatchMessage(Handler.java:98) 
        at android.os.Looper.loop(Looper.java:135) 
        at android.os.HandlerThread.run(HandlerThread.java:61) 
I/System.out: Player Error::com.google.android.exoplayer2.ExoPlaybackException: com.google.android.exoplayer2.audio.AudioSink$InitializationException: AudioTrack init failed: 0, Config(32000, 12, 32000)
E/Render TAG: TYPE_RENDERER: AudioTrack init failed: 0, Config(32000, 12, 32000)

这是我的流式音频代码:

//Setting Up Exoplayer
private void SetupPlayer(){
// Create a data source factory.
dataSourceFactory =
        new DefaultHttpDataSourceFactory(Util.getUserAgent(this
                , getApplicationInfo().loadLabel(getPackageManager()).toString()));
loadControl = new DefaultLoadControl.Builder()
        .setBufferDurationsMs(MIN_BUFFER_DURATION, MAX_BUFFER_DURATION, MIN_PLAYBACK_START_BUFFER, MIN_PLAYBACK_RESUME_BUFFER).createDefaultLoadControl();

@DefaultRenderersFactory.ExtensionRendererMode int extensionRendererMode = DefaultRenderersFactory.EXTENSION_RENDERER_MODE_PREFER;

renderersFactory = new DefaultRenderersFactory(this) .setExtensionRendererMode(extensionRendererMode);

// Create a progressive media source pointing to a stream uri.
        mediaSource = new ProgressiveMediaSource.Factory(dataSourceFactory)
        .createMediaSource(Uri.parse(audio_url));
// Create a player instance.
simpleExoPlayer =  new SimpleExoPlayer.Builder(this,renderersFactory).setLoadControl(loadControl).build();
// Prepare the player with the media source.
simpleExoPlayer.prepare(mediaSource, true, true);
}

我搜索了 Stack Overflow，但找不到任何答案。 exoplayer 的版本我使用的是 2.11.8 .我不知道如何解决这个错误。请帮助我提供一些解决方案来修复 Android 5.0 设备中的此错误。

Answer 1

我最近遇到了与 API <23 和 ExoPlayer 2.13.2 完全相同的问题，并且在深入研究时在 ExoPlayer developers web-site 上找到了此注释:

Android’s official emulator (...) supports ExoPlayer provided the system image has an API level of at least 23. System images with earlier API levels do not support ExoPlayer.

不幸的是，我没有支持 API-21 的设备。我仍然会为后代留下这张纸条。