Exoplayer 2 将媒体源更改为剪辑视频

Question

我正在尝试为我们的一个应用程序实施 exoplayer 2。

似乎比自动播放更复杂的文档和示例很差。

我的问题是我创建了一个媒体源并将其设置为播放器，之后我有一个播放视频的自定义图标，完成后我返回到 0。

我还有一个自定义的双搜索栏，当移动它时，它会搜索到一个位置并在选定的开始和结束时间之间剪辑视频。

我不确定是否可以在不重新创建整个内容的情况下更改播放器的来源。

我将播放器初始化为：

@AfterViews
protected void init() {
        TrackSelector trackSelector = new DefaultTrackSelector();
        mPlayer = ExoPlayerFactory.newSimpleInstance(getContext(), trackSelector);
        mVideoView.setPlayer(mPlayer);
        mPlayer.addListener(this);
}

之后我这样准备播放器：

public void setVideoPath(final String videoPath) {
        mVideoPath = videoPath;
        // Produces DataSource instances through which media data is loaded.
        DataSource.Factory dataSourceFactory = new DefaultDataSourceFactory(getContext(), Util.getUserAgent(getContext(), "yourApplicationName"));
        // This is the MediaSource representing the media to be played.
        videoSource = new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(Uri.parse(videoPath));
        mPlayer.prepare(videoSource);
}

单击我的播放图标时它会运行：

@Click(R.id.view_video_preview_container_play)
    void onPlayClicked() {
        mPlayButton.setVisibility(GONE);
        mPlayer.setPlayWhenReady(true);
}

播放完成后我做：

@Override
    public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {

        if (playbackState == STATE_ENDED) {
            mPlayButton.setVisibility(VISIBLE);
            mPlayer.seekTo(0);
            mPlayer.setPlayWhenReady(false);
        }
}

不，当我寻求时，我会：

disposable = source
                .debounce(500, TimeUnit.MILLISECONDS)
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(range -> {
                            mPlayer.stop();
                            mPlayButton.setVisibility(VISIBLE);
                            clippingSource = new ClippingMediaSource(videoSource, 2000000, 5000000);
                            mPlayer.prepare(clippingSource);
                        }
                );

现在，当源发射到我的可观察对象时，我返回：

2018-11-16 12:48:16.463 28090-28209/nl.dtt.vormats E/ExoPlayerImplInternal: Source error.
    com.google.android.exoplayer2.source.ClippingMediaSource$IllegalClippingException: Illegal clipping: not seekable to start
        at com.google.android.exoplayer2.source.ClippingMediaSource$ClippingTimeline.<init>(ClippingMediaSource.java:350)
        at com.google.android.exoplayer2.source.ClippingMediaSource.refreshClippedTimeline(ClippingMediaSource.java:296)
        at com.google.android.exoplayer2.source.ClippingMediaSource.onChildSourceInfoRefreshed(ClippingMediaSource.java:262)
        at com.google.android.exoplayer2.source.ClippingMediaSource.onChildSourceInfoRefreshed(ClippingMediaSource.java:34)
        at com.google.android.exoplayer2.source.CompositeMediaSource.onSourceInfoRefreshed(CompositeMediaSource.java:103)
        at com.google.android.exoplayer2.source.BaseMediaSource.refreshSourceInfo(BaseMediaSource.java:73)
        at com.google.android.exoplayer2.source.ExtractorMediaSource.notifySourceInfoRefreshed(ExtractorMediaSource.java:400)
        at com.google.android.exoplayer2.source.ExtractorMediaSource.prepareSourceInternal(ExtractorMediaSource.java:348)
        at com.google.android.exoplayer2.source.BaseMediaSource.prepareSource(BaseMediaSource.java:137)
        at com.google.android.exoplayer2.source.CompositeMediaSource.prepareChildSource(CompositeMediaSource.java:109)
        at com.google.android.exoplayer2.source.ClippingMediaSource.prepareSourceInternal(ClippingMediaSource.java:216)
        at com.google.android.exoplayer2.source.BaseMediaSource.prepareSource(BaseMediaSource.java:137)
        at com.google.android.exoplayer2.ExoPlayerImplInternal.prepareInternal(ExoPlayerImplInternal.java:396)
        at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:286)
        at android.os.Handler.dispatchMessage(Handler.java:104)
        at android.os.Looper.loop(Looper.java:166)
        at android.os.HandlerThread.run(HandlerThread.java:65)

不幸的是，正如我在文档之前所说的那样非常糟糕，我设法只发现异常被抛出：

if (startUs != 0 && !window.isSeekable) {
          throw new IllegalClippingException(IllegalClippingException.REASON_NOT_SEEKABLE_TO_START);
}

具体来说window.isSeekable为假。

Answer 1

解决方案是重新创建 MediaSource，因为看起来同一个 MediaSource 无法重复使用。

Exoplayer 2 将媒体源更改为剪辑视频

Exoplayer 2 change media source to clip video

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exoplayer

exoplayer2.x