Exoplayer HLS 无限缓冲

Question

我在播放流时遇到问题，这是来自 EventLogger 的数据：

 D/EventLogger: tracks [eventTime=16.68, mediaPos=5.04, window=0, period=0
2020-12-15 14:26:21.803 D/EventLogger:   MediaCodecVideoRenderer [
2020-12-15 14:26:21.803 D/EventLogger:     Group:0, adaptive_supported=N/A [
2020-12-15 14:26:21.804 D/EventLogger:       [X] Track:0, id=0, mimeType=video/avc, bitrate=1470000, codecs=avc1.4D401E, res=720x576, fps=25.0, supported=YES
2020-12-15 14:26:21.804 D/EventLogger:     ]
2020-12-15 14:26:21.804 D/EventLogger:     Metadata [
2020-12-15 14:26:21.804 D/EventLogger:       HlsTrackMetadataEntry
2020-12-15 14:26:21.804 D/EventLogger:     ]
2020-12-15 14:26:21.804 D/EventLogger:   ]
2020-12-15 14:26:21.804 D/EventLogger:   FfmpegAudioRenderer [
2020-12-15 14:26:21.804 D/EventLogger:     Group:0, adaptive_supported=N/A [
2020-12-15 14:26:21.804 D/EventLogger:       [X] Track:0, id=6128/4, mimeType=audio/mpeg-L2, channels=2, sample_rate=48000, language=srb, supported=YES
2020-12-15 14:26:21.804 D/EventLogger:     ]
2020-12-15 14:26:21.804 D/EventLogger:   ]
2020-12-15 14:26:21.804 D/EventLogger:   MediaCodecAudioRenderer []
2020-12-15 14:26:21.804 D/EventLogger:   TextRenderer []
2020-12-15 14:26:21.804 D/EventLogger:   MetadataRenderer [
2020-12-15 14:26:21.804 D/EventLogger:     Group:0, adaptive_supported=N/A [
2020-12-15 14:26:21.804 D/EventLogger:       [X] Track:0, id=null, mimeType=application/id3, supported=YES
2020-12-15 14:26:21.804 D/EventLogger:     ]
2020-12-15 14:26:21.804 D/EventLogger:   ]
2020-12-15 14:26:21.804 D/EventLogger:   CameraMotionRenderer []
2020-12-15 14:26:21.804 D/EventLogger: ]
2020-12-15 14:26:21.808 D/EventLogger: downstreamFormat [eventTime=16.69, mediaPos=5.04, window=0, period=0, id=0, mimeType=null, bitrate=1470000, res=1048x576, fps=25.0]
2020-12-15 14:26:21.808 D/EventLogger: videoInputFormat [eventTime=16.69, mediaPos=5.04, window=0, period=0, id=0, mimeType=video/avc, bitrate=1470000, codecs=avc1.4D401E, res=720x576, fps=25.0]
2020-12-15 14:26:21.823 D/EventLogger: audioDecoderInitialized [eventTime=16.70, mediaPos=5.04, window=0, period=0, ffmpegLavc58.54.100-mp3]
2020-12-15 14:26:21.823 D/EventLogger: audioInputFormat [eventTime=16.70, mediaPos=5.04, window=0, period=0, id=6128/4, mimeType=audio/mpeg-L2, channels=2, sample_rate=48000, language=srb]
2020-12-15 14:26:21.832 D/EventLogger: audioSessionId [eventTime=16.71, mediaPos=5.04, window=0, period=0, 1857]
2020-12-15 14:26:21.997 D/EventLogger: loading [eventTime=16.88, mediaPos=5.04, window=0, period=0, false]
2020-12-15 14:26:27.782 D/EventLogger: timeline [eventTime=22.66, mediaPos=0.04, window=0, period=0, periodCount=1, windowCount=1, reason=SOURCE_UPDATE
2020-12-15 14:26:27.782 D/EventLogger:   period [?]
2020-12-15 14:26:27.782 D/EventLogger:   window [21.24, true, true]
2020-12-15 14:26:27.782 D/EventLogger: ]
2020-12-15 14:26:33.827 D/EventLogger: timeline [eventTime=28.71, mediaPos=-4.96, window=0, period=0, periodCount=1, windowCount=1, reason=SOURCE_UPDATE
2020-12-15 14:26:33.827 D/EventLogger:   period [?]
2020-12-15 14:26:33.827 D/EventLogger:   window [21.48, true, true]
2020-12-15 14:26:33.827 D/EventLogger: ]
2020-12-15 14:26:39.872 D/EventLogger: timeline [eventTime=34.75, mediaPos=-9.96, window=0, period=0, periodCount=1, windowCount=1, reason=SOURCE_UPDATE
2020-12-15 14:26:39.872 D/EventLogger:   period [?]
2020-12-15 14:26:39.872 D/EventLogger:   window [21.44, true, true]
2020-12-15 14:26:39.872 D/EventLogger: ]

播放器的设置方式如下：

    DataSource.Factory dataSourceFactory = Tools.createDataSourceFactory(getActivity(), Util.getUserAgent(getActivity(), getActivity().getPackageName()));

    DefaultRenderersFactory defaultRenderersFactory = new DefaultRenderersFactory(getActivity())
        .setExtensionRendererMode(DefaultRenderersFactory.EXTENSION_RENDERER_MODE_PREFER);

    DefaultTrackSelector defaultTrackSelector = new DefaultTrackSelector(getActivity());

    factory = new HlsMediaSource.Factory(dataSourceFactory)
        .setAllowChunklessPreparation(true);

---

    player = new SimpleExoPlayer
        .Builder(getActivity(), defaultRenderersFactory)
        .setTrackSelector(defaultTrackSelector)
        .build();
    player.addAnalyticsListener(new EventLogger(defaultTrackSelector));
    binding.playerView.setPlayer(player);

public static DefaultDataSourceFactory createDataSourceFactory(Context context, String
    userAgent) {
    // Default parameters, except allowCrossProtocolRedirects is true
    DefaultHttpDataSourceFactory httpDataSourceFactory = new DefaultHttpDataSourceFactory(
        userAgent,
        null,
        DefaultHttpDataSource.DEFAULT_CONNECT_TIMEOUT_MILLIS,
        DefaultHttpDataSource.DEFAULT_READ_TIMEOUT_MILLIS,
        true /* allowCrossProtocolRedirects */
    );
    return new DefaultDataSourceFactory(
        context,
        null,
        httpDataSourceFactory
    );
}

我发现这个流与在同一播放器中工作的具有相同编解码器（avc + mpeg L2 音频）的另一个流之间的唯一区别是“mediaPos”在此流中为负值，并且逐渐减少而不是增加。

同一个流可以与 VLC 一起使用，还有另一个使用 ExoPlayer 的应用程序（我没有源代码）。

我尝试禁用 ffmpeg 扩展 - 它没有任何改变。

我使用的是ExoPlayer 2.12.2版本。

它在 ExoPlayer 演示应用程序中也不起作用。

Answer 1

这对我的情况有帮助

工厂 = new HlsMediaSource.Factory(dataSourceFactory) .setExtractorFactory(new DefaultHlsExtractorFactory(FLAG_ALLOW_NON_IDR_KEYFRAMES, true)) .setAllowChunklessPreparation(true);

您也可以尝试 FLAG_DETECT_ACCESS_UNITS 标志。请参阅：https://developer.android.com/media/media3/exoplayer/troubleshooting#why-do-some-mpeg-ts-files-fail-to-play