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我的音频文件从firebase storage我的 android 应用程序流式传输。exoplayer在 android 版本中效果很好，即>= 6.0. 但是在Android 5.0/5.1(Lollipop)设备中，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我使用的版本是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

我最近在 API <23 和 ExoPlayer 2.13.2 上遇到了完全相同的问题，并且在深入研究时在ExoPlayer 开发人员网站上发现了此注释：

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Android\xe2\x80\x99s 官方模拟器 (...) 支持 ExoPlayer，前提是系统映像的 API 级别至少为 23。具有较早 API 级别的系统映像不支持 ExoPlayer。

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不幸的是，我没有支持 API-21 的设备。尽管如此，我仍将为后代留下这张纸条。

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