ExoPlayer 2 Migration

Question

Unten sehen Sie den Codeausschnitt, den wir für die Wiedergabe von mp4-Video von einer URL mit ExoPlayer1 verwenden, und ich bin nach dem Upgrade auf ExoPlayer2. Ich bin nicht sicher, was ich aktualisieren soll, damit es nach dem Upgrade funktioniert, da ich den ExoPlayer selbst nicht sehr gut kenne und nicht viele nützliche Dokumentationen dazu. Jede geschätzte Hilfe .. Dank etwas Licht, wenn eine Dose Schatten häuft

private static final int BUFFER_SEGMENT_SIZE = 64 * 1024; 
private static final int BUFFER_SEGMENT_COUNT = 256; 
private ExoPlayer videoPlayer; 
private Allocator allocator = new DefaultAllocator(BUFFER_SEGMENT_SIZE); 

private void playVideo(Uri uri) { 
    Handler handler = new Handler(); 
    DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter(handler, null); 
    DataSource dataSource = new DefaultUriDataSource(getContext(), bandwidthMeter, "Android-ExoPlayer"); 

    SampleSource sampleSource = new ExtractorSampleSource(
      uri, 
      dataSource, 
      allocator, 
      BUFFER_SEGMENT_COUNT * BUFFER_SEGMENT_SIZE); 

    TrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(
      sampleSource, 
      MediaCodecSelector.DEFAULT); 

    // 2. Construct renderers. 
    TrackRenderer videoRenderer = new MediaCodecVideoTrackRenderer(
      getContext(), 
      sampleSource, 
      MediaCodecSelector.DEFAULT, 
      MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT); 

    // 1. Instantiate the player. 
    if (videoPlayer == null) { 
     videoPlayer = ExoPlayer.Factory.newInstance(4); 
    } 


     // 3. Inject the renderers through prepare. 
     videoPlayer.prepare(videoRenderer, audioRenderer); 

     // 4. Pass the surface to the video renderer. 
     SurfaceTexture surfaceTexture = textureView.getSurfaceTexture(); 
     Surface surface = new Surface(surfaceTexture); 
     videoPlayer.sendMessage(videoRenderer, MediaCodecVideoTrackRenderer.MSG_SET_SURFACE, surface); 


    videoPlayer.addListener(new ExoPlayer.Listener() { 
     @Override 
     public void onPlayerStateChanged(boolean b, int i) { 
      if (i == ExoPlayer.STATE_READY) { 
       mediaControl.setMedia(new MediaControl.Media() { 
        @Override 
        public void setCurrentPosition(long positionMs) { 
         if (videoPlayer != null) { 
          videoPlayer.seekTo(positionMs); 
         } 
        } 

        @Override 
        public long getCurrentPosition() { 
         if (videoPlayer != null) { 
          return videoPlayer.getCurrentPosition(); 
         } 
         return 0; 
        } 

        @Override 
        public long getDuration() { 
         if (videoPlayer != null) { 
          return videoPlayer.getDuration(); 
         } 
         return 0; 
        } 

        @Override 
        public void start() { 
         if (videoPlayer != null) { 
          videoPlayer.setPlayWhenReady(true); 
         } 
        } 

        @Override 
        public void pause() { 
         if (videoPlayer != null) { 
          videoPlayer.setPlayWhenReady(false); 
         } 
        } 

        @Override 
        public int getBufferedPercentage() { 
         if (videoPlayer != null) { 
          return videoPlayer.getBufferedPercentage(); 
         } 
         return 0; 
        } 
       }); 

       mediaControl.start(); 

       videoPlayer.removeListener(this); 
      } 
     } 

     @Override 
     public void onPlayWhenReadyCommitted() { 

     } 

     @Override 
     public void onPlayerError(ExoPlaybackException e) { 
      mediaControl.pause(); 
     } 
    }); 

    // 5. Start playback. 
    mediaControl.start(); 
} 

Answer 1

Handler handler = new Handler(); 
DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter(handler, null); 
MediaSource sampleSource = new ExtractorMediaSource(
    uri, 
    new DefaultDataSourceFactory(getContext(), "Android-ExoPlayer", bandwidthMeter), 
    new DefaultExtractorsFactory(), null, null); 

if (videoPlayer == null) { 
    Handler mainHandler = new Handler(); 
    TrackSelection.Factory videoTrackSelectionFactory = 
     new AdaptiveVideoTrackSelection.Factory(bandwidthMeter); 
    TrackSelector trackSelector = 
     new DefaultTrackSelector(mainHandler, videoTrackSelectionFactory); 
    LoadControl loadControl = new DefaultLoadControl(); 
    videoPlayer = ExoPlayerFactory.newSimpleInstance(getContext(), trackSelector, loadControl); 
} 

videoPlayer.prepare(sampleSource); 
videoPlayer.setVideoTextureView(textureView);