使用 ExoPlayer 播放 HLS

Question

我正在尝试通过扩展 SurfaceView 并将 ExoPlayer 视频渲染到其表面来创建一个非常简单的视图。我想支持 HLS 且仅支持 HLS。我似乎始终如一地获得音频，但我从未在屏幕上看到视频。我很好奇我可能做错了什么。

我在 Logcat 中看到的唯一错误如下：

E/OMXMaster﹕ A component of name 'OMX.qcom.audio.decoder.aac' already exists, ignoring this one.

下面是我的代码。

private static final int BUFFER_SEGMENT_SIZE = 256 * 1024;
private static final int BUFFER_SEGMENTS = 64;

private ExoPlayer mExoPlayer;
private Handler mHandler;
private AudioCapabilitiesReceiver mAudioCapabilitiesReceiver;
private AudioCapabilities mAudioCapabilities;
private ManifestFetcher<HlsPlaylist> playlistFetcher;
private String mUserAgent;
String url = "http://solutions.brightcove.com/bcls/assets/videos/Great-Blue-Heron.m3u8";

public ExoPlayerView(Context context) {
    super(context);
}

public ExoPlayerView(Context context, AttributeSet attrs) {
    super(context, attrs);
}

public ExoPlayerView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
}

@Override
public void init() {
    mHandler = new Handler();
    mUserAgent = Util.getUserAgent(getContext(), "CX Video Player");
    HlsPlaylistParser parser = new HlsPlaylistParser();
    playlistFetcher = new ManifestFetcher<>(url, new DefaultUriDataSource(getContext(), mUserAgent),
            parser);
    mAudioCapabilitiesReceiver = new AudioCapabilitiesReceiver(getContext(), this);
    mAudioCapabilitiesReceiver.register();
}

@Override
public void play() {
    mExoPlayer.setPlayWhenReady(true);
}

@Override
public void stop() {
    mExoPlayer.stop();
    release();
}

@Override
public void pause() {
    mExoPlayer.setPlayWhenReady(false);
}

@Override
public void seekTo(long timeMillis) {
    mExoPlayer.seekTo(timeMillis);
}

@Override
public long getCurrentPosition() {
    return mExoPlayer.getCurrentPosition();
}

@Override
public boolean isPlaying() {
    return false;
}

@Override
public void playNext() {

}

@Override
public boolean isPlayingLastVideo() {
    return false;
}

@Override
public int getDuration() {
    return (int)mExoPlayer.getDuration();
}

@Override
public void addVideo(Uri uri) {

}

@Override
public void addVideos(List<Uri> uris) {

}

@Override
public void release() {
    mAudioCapabilitiesReceiver.unregister();
    mExoPlayer.release();
}

@Override
public void onSingleManifest(HlsPlaylist hlsPlaylist) {
    final int numRenderers = 2;

    LoadControl loadControl = new DefaultLoadControl(new DefaultAllocator(BUFFER_SEGMENT_SIZE));
    DefaultBandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();

    int[] variantIndices = null;
    if (hlsPlaylist instanceof HlsMasterPlaylist) {
        HlsMasterPlaylist masterPlaylist = (HlsMasterPlaylist) hlsPlaylist;
        try {
            variantIndices = VideoFormatSelectorUtil.selectVideoFormatsForDefaultDisplay(
                    getContext(), masterPlaylist.variants, null, false);
        } catch (MediaCodecUtil.DecoderQueryException e) {
            e.printStackTrace();
            return;
        }
        if (variantIndices.length == 0) {
            return;
        }
    }

    DataSource dataSource = new DefaultUriDataSource(getContext(), bandwidthMeter, mUserAgent);
    HlsChunkSource hlsChunkSource = new HlsChunkSource(dataSource, url, hlsPlaylist, bandwidthMeter,
            variantIndices, HlsChunkSource.ADAPTIVE_MODE_SPLICE, mAudioCapabilities);
    HlsSampleSource hlsSampleSource = new HlsSampleSource(hlsChunkSource, loadControl, BUFFER_SEGMENTS * BUFFER_SEGMENT_SIZE);

    // Build the track renderers
    TrackRenderer videoRenderer = new MediaCodecVideoTrackRenderer(hlsSampleSource, MediaCodec.VIDEO_SCALING_MODE_SCALE_TO_FIT_WITH_CROPPING);
    TrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(hlsSampleSource);

    // Build the ExoPlayer and start playback
    mExoPlayer = ExoPlayer.Factory.newInstance(numRenderers);
    mExoPlayer.prepare(videoRenderer, audioRenderer);

    // Pass the surface to the video renderer.
    mExoPlayer.sendMessage(videoRenderer, MediaCodecVideoTrackRenderer.MSG_SET_SURFACE, getHolder().getSurface());

    mExoPlayer.setPlayWhenReady(true);
}

@Override
public void onSingleManifestError(IOException e) {

}

@Override
public void onAudioCapabilitiesChanged(AudioCapabilities audioCapabilities) {
    mAudioCapabilities = audioCapabilities;
    playlistFetcher.singleLoad(mHandler.getLooper(), this);
}
}

Answer 1

所以我发现了我的问题。回顾演示代码后，我注意到演示 SurfaceView 被包裹在 com.google.android.exoplayer.AspectRatioFrameLayout 中。将我的 SurfaceView 包裹在相同的布局中后，视频神奇地开始播放。

Answer 2

我遇到过类似的情况，我能听到音频但听不到视频，只有黑屏。结果我试图发送设定的表面消息：

player.sendMessage(videoRenderer, MediaCodecVideoTrackRenderer.MSG_SET_SURFACE, surface);

在视频渲染实际初始化并准备就绪之前，这就是为什么我只能听到音频

使用 ExoPlayer 播放 HLS

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