Почему Exoplayer воспроизводит поток m3u8 в низком качестве

Question

Я использую exoplayer для воспроизведения живого потока m3u8 из github source code поток работает, но качество видео похоже на 240p .

также через некоторое времяПоток останавливается, а затем запускается снова, когда он будет готов, есть ли способ заставить поток продолжать загрузку, чтобы избежать остановок.если вы видите на этом изображении изображение контроллера мультимедиа , вы увидите, что таймер составляет всего 30 секунд,

Вот мой класс Java:

public class MainActivity extends AppCompatActivity implements VideoRendererEventListener {

private static final String TAG = "MainActivity";
private SimpleExoPlayerView simpleExoPlayerView;
private SimpleExoPlayer player;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

    BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
    TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveTrackSelection.Factory(bandwidthMeter);
    TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);

    LoadControl loadControl = new DefaultLoadControl();

    player = ExoPlayerFactory.newSimpleInstance(this, trackSelector, loadControl);
    simpleExoPlayerView = new SimpleExoPlayerView(this);
    simpleExoPlayerView = findViewById(R.id.player_view);

    //Set media controller
    simpleExoPlayerView.setUseController(true);
    simpleExoPlayerView.requestFocus();

    // Bind the player to the view.
    simpleExoPlayerView.setPlayer(player);

    /// ========================== load file from url
    Uri mp4VideoUri = Uri.parse("http://playlist.m3u8");

    DefaultBandwidthMeter bandwidthMeterA = new DefaultBandwidthMeter();
    //Produces DataSource instances through which media data is loaded.
    DefaultDataSourceFactory dataSourceFactory = new DefaultDataSourceFactory(this, Util.getUserAgent(this, "exoplayer2example"), bandwidthMeterA);

    //FOR LIVESTREAM LINK:
    MediaSource videoSource = new HlsMediaSource(mp4VideoUri, dataSourceFactory, 1, null, null);
    final LoopingMediaSource loopingSource = new LoopingMediaSource(videoSource);

    // Prepare the player with the source.
    player.prepare(loopingSource);

    player.addListener(new ExoPlayer.EventListener() {
        @Override
        public void onTimelineChanged(Timeline timeline, Object manifest) {
            Log.v(TAG, "Listener-onTimelineChanged...");
        }

        @Override
        public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
            Log.v(TAG, "Listener-onTracksChanged...");
        }

        @Override
        public void onLoadingChanged(boolean isLoading) {
            Log.v(TAG, "Listener-onLoadingChanged...isLoading:" + isLoading);
        }

        @Override
        public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {
            Log.v(TAG, "Listener-onPlayerStateChanged..." + playbackState);
        }

        @Override
        public void onRepeatModeChanged(int repeatMode) {
            Log.v(TAG, "Listener-onRepeatModeChanged...");
        }

        @Override
        public void onPlayerError(ExoPlaybackException error) {
            Log.v(TAG, "Listener-onPlayerError...");

            player.stop();
            player.prepare(loopingSource);
            player.setPlayWhenReady(true);


        }

        @Override
        public void onPositionDiscontinuity() {
            Log.v(TAG, "Listener-onPositionDiscontinuity...");
        }

        @Override
        public void onPlaybackParametersChanged(PlaybackParameters playbackParameters) {
            Log.v(TAG, "Listener-onPlaybackParametersChanged...");
        }
    });

    player.setPlayWhenReady(true);
    player.setVideoDebugListener(this);
}

@Override
public void onVideoEnabled(DecoderCounters counters) {

}

@Override
public void onVideoDecoderInitialized(String decoderName, long initializedTimestampMs, long initializationDurationMs) {

}

@Override
public void onVideoInputFormatChanged(Format format) {

}

@Override
public void onDroppedFrames(int count, long elapsedMs) {

}

@Override
public void onVideoSizeChanged(int width, int height, int unappliedRotationDegrees, float pixelWidthHeightRatio) {
    Log.v(TAG, "onVideoSizeChanged [" + " width: " + width + " height: " + height + "]");

}

@Override
public void onRenderedFirstFrame(Surface surface) {

}

@Override
public void onVideoDisabled(DecoderCounters counters) {

}


@Override
protected void onStop() {
    super.onStop();
    Log.v(TAG, "onStop()...");
}

@Override
protected void onStart() {
    super.onStart();
}

@Override
protected void onResume() {
    super.onResume();
    Log.v(TAG, "onResume()...");
}

@Override
protected void onPause() {
    super.onPause();
    Log.v(TAG, "onPause()...");
}

@Override
protected void onDestroy() {
    super.onDestroy();
    Log.v(TAG, "onDestroy()...");
    player.release();
}

}