android - ExoPlayer 不播放 Kitkat 中原始文件夹中的视频

Question

你好，我正在学习 Exoplayer，所以我开发了一个简单的应用程序，我在其中从原始文件夹中检索视频。此应用程序在 Lollipop 上运行良好，但当我在 Kitkat 版本中启动相同的应用程序时，它仅在媒体 Controller 上显示带有视频长度的黑屏。我试图找到但没有得到关于这个问题的任何信息需要关于这个问题的一些建议。提前致谢!

主.xml

     <?xml version="1.0" encoding="utf-8"?>
        <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_margin="20dp"
            tools:context=".MainActivity">

            <com.google.android.exoplayer2.ui.PlayerView
                android:id="@+id/player_view"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" />

        </RelativeLayout> 

主.java

public class MainActivity extends AppCompatActivity {

    private PlayerView playerView;
    private SimpleExoPlayer player;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        playerView = findViewById(R.id.player_view);

    }

    @Override
    protected void onStart() {
        super.onStart();
        player = ExoPlayerFactory.newSimpleInstance(this,new DefaultTrackSelector());
        playerView.setPlayer(player);

        final RawResourceDataSource rawResourceDataSource = new RawResourceDataSource(this);
        DataSpec dataSpec = new DataSpec(RawResourceDataSource.buildRawResourceUri(R.raw.tara));
        try {
            rawResourceDataSource.open(dataSpec);

            DataSource.Factory factory = new DataSource.Factory() {
                @Override
                public DataSource createDataSource() {
                    return rawResourceDataSource;
                }
            };
            MediaSource videoSource = new ExtractorMediaSource.Factory(factory).createMediaSource(rawResourceDataSource.getUri());
            player.prepare(videoSource);
            player.setPlayWhenReady(true);

        } catch (RawResourceDataSource.RawResourceDataSourceException e) {
            e.printStackTrace();
        }


    }
}

Logcat 错误

E/ACodec: [OMX.google.h264.decoder] ERROR(0x80001001)
E/MediaCodec: Codec reported an error. (omx error 0x80001001, internalError -2147483648)
E/ExoPlayerImplInternal: Internal runtime error.
    java.lang.IllegalStateException
        at android.media.MediaCodec.dequeueOutputBuffer(Native Method)
        at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.drainOutputBuffer(MediaCodecRenderer.java:1024)
        at com.google.android.exoplayer2.mediacodec.MediaCodecRenderer.render(MediaCodecRenderer.java:573)
        at com.google.android.exoplayer2.ExoPlayerImplInternal.doSomeWork(ExoPlayerImplInternal.java:518)
        at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:301)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:136)
        at android.os.HandlerThread.run(HandlerThread.java:61)

Answer 1

你能试试 onStart 方法中的这段代码吗:

TrackSelection.Factory videoTrackSelectionFactory =
                new AdaptiveTrackSelection.Factory(null);
        player = ExoPlayerFactory.newSimpleInstance(this, new DefaultTrackSelector(videoTrackSelectionFactory));
        player.setRepeatMode(Player.REPEAT_MODE_ONE);
        player.setVideoScalingMode(C.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);
        playerView.setResizeMode(AspectRatioFrameLayout.RESIZE_MODE_FILL);
        playerView.setUseController(false);
        playerView.setPlayer(player);
        player.setPlayWhenReady(true);
        final RawResourceDataSource rawResourceDataSource = new RawResourceDataSource(this);
        DataSpec dataSpec = new DataSpec(RawResourceDataSource.buildRawResourceUri(R.raw.tara));
        try {
            rawResourceDataSource.open(dataSpec);
            DataSource.Factory factory = new DataSource.Factory() {
                @Override
                public DataSource createDataSource() {
                    return rawResourceDataSource;
                }
            };
            MediaSource videoSource = new ExtractorMediaSource.Factory(factory).createMediaSource(rawResourceDataSource.getUri());
            player.prepare(videoSource);
        } catch (RawResourceDataSource.RawResourceDataSourceException e) {
            e.printStackTrace();
        }