装修公司做网站推广能接到活吗,湘潭正规seo优化,东莞骄阳网站建设,怎样做聊天网站在之前的文章ExoPlayer中常见MediaSource子类的区别和使用场景中介绍了Exoplayer中各种子MediaSource的使用场景#xff0c;这篇我们着重详细介绍下实现多路流混合播放的用法。常见的使用场景有#xff1a;视频文件电影字幕、正片视频广告视频、背景视频背景音乐等。
初始化…在之前的文章ExoPlayer中常见MediaSource子类的区别和使用场景中介绍了Exoplayer中各种子MediaSource的使用场景这篇我们着重详细介绍下实现多路流混合播放的用法。常见的使用场景有视频文件电影字幕、正片视频广告视频、背景视频背景音乐等。
初始化Exoplayer就不多说了随便查查文档就知道。
ExoPlayer mExoPlayer new ExoPlayer.Builder(context, new DefaultMediaSourceFactory(context)).build();
1.视频文件电影字幕MergingMediaSource
Uri videoUri Uri.parse(https://example.com/video.mp4);
Uri subtitleUri Uri.parse(https://example.com/subtitles.srt);MediaSource videoSource new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(videoUri);MediaSource subtitleSource new SingleSampleMediaSource.Factory(dataSourceFactory).createMediaSource(subtitleUri, Format.createTextSampleFormat(subs, MimeTypes.TEXT_SUBRIP, C.SELECTION_FLAG_DEFAULT, en));MediaSource mergedSource new MergingMediaSource(videoSource, subtitleSource);
2.广告视频正片视频ConcatenatingMediaSource
DefaultMediaSourceFactory mediaSourceFactory new DefaultMediaSourceFactory(dataSourceFactory);// 创建两个视频的 MediaSourceMediaSource video1Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/01.mp4));MediaSource video2Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/02.mp4));ConcatenatingMediaSource concatenatingMediaSource new ConcatenatingMediaSource(video1Source,video2Source);mExoPlayer.setMediaSource(concatenatingMediaSource);
这样就能让两个视频按顺序播放且无缝衔接若还想它两循环播放可用LoopingMediaSource进一步封装。
//无限循环
LoopingMediaSource loopingMediaSource new LoopingMediaSource(concatenatingMediaSource);
//循环5次
LoopingMediaSource loopingMediaSource new LoopingMediaSource(concatenatingMediaSource,5);
mExoPlayer.setMediaSource(loopingMediaSource);
3.视频音频
DefaultMediaSourceFactory mediaSourceFactory new DefaultMediaSourceFactory(dataSourceFactory);MediaSource video2Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/02.mp4));
MediaSource audio1Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/audio/ori.mp2));MergingMediaSource audioMerged new MergingMediaSource(video2Source , audio1Source);
mExoPlayer.setMediaSource(audioMerged ); 上面是1个视频1个音频当然也可以支持1个视频多个音频比如电影中有多个不同语言的音轨
DefaultMediaSourceFactory mediaSourceFactory new DefaultMediaSourceFactory(dataSourceFactory);MediaSource video1Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/01.mp4));// 合并两个音频源MediaSource audio1Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/audio/ori.mp2));MediaSource audio2Source mediaSourceFactory.createMediaSource(MediaItem.fromUri(asset://android_asset/audio/acc.mp2));MergingMediaSource audioMerged new MergingMediaSource(audio1Source,audio2Source);
//合并视频和音频MergingMediaSource finalSource new MergingMediaSource(audioMerged,video1Source);mExoPlayer.setMediaSource(finalSource);
这样就可以实现一个视频混合多个音轨文件的播放了那么如何动态切换不同音轨呢TrackSelector
DefaultTrackSelector trackSelector new DefaultTrackSelector(context);
mExoPlayer new ExoPlayer.Builder(context, renderersFactory).setTrackSelector(trackSelector) .build();//查看所有音轨信息private class PlayerEventListener implements Player.Listener {SuppressLint(UnsafeOptInUsageError)Overridepublic void onTracksChanged(Tracks tracks) {audioList.clear();Player.Listener.super.onTracksChanged(tracks);ImmutableListTracks.Group trackGroups tracks.getGroups();for (int index 0; index trackGroups.size(); index) {Tracks.Group group trackGroups.get(index);for (int jIndex 0; jIndex group.length; jIndex) {Format format group.getTrackFormat(jIndex);LOG.info(onTracksChanged format Format.toLogString(format));if (MimeTypes.isAudio(format.sampleMimeType)) {audioList.add(format);}}}currentTrackGroups mExoPlayer.getCurrentTrackGroups();}mExoPlayer.addListener(new PlayerEventListener());// 用户选择第 index 个音轨TrackGroup selectedGroup null;selectedGroup currentTrackGroups.get(1); //根据需要选择第几个音轨// 应用新音轨mExoPlayer.setTrackSelectionParameters(mExoPlayer.getTrackSelectionParameters().buildUpon().setOverrideForType(new TrackSelectionOverride(selectedGroup, 0)) // 需要切换到的音轨索引.build()); 这里有个问题就是如果视频和音频时长不一致特别是想混合多个音频和多个视频时就会出问题无法播放报错如下
E/ExoPlayerImplInternal(11191): Playback error
E/ExoPlayerImplInternal(11191): com.google.android.exoplayer2.ExoPlaybackException: Source error
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.ExoPlayerImplInternal.handleIoException(ExoPlayerImplInternal.java:684)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.ExoPlayerImplInternal.handleMessage(ExoPlayerImplInternal.java:660)
E/ExoPlayerImplInternal(11191): at android.os.Handler.dispatchMessage(Handler.java:98)
E/ExoPlayerImplInternal(11191): at android.os.Looper.loop(Looper.java:136)
E/ExoPlayerImplInternal(11191): at android.os.HandlerThread.run(HandlerThread.java:61)
E/ExoPlayerImplInternal(11191): Caused by: com.google.android.exoplayer2.source.MergingMediaSource$IllegalMergeException
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.MergingMediaSource.onChildSourceInfoRefreshed(MergingMediaSource.java:252)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.MergingMediaSource.onChildSourceInfoRefreshed(MergingMediaSource.java:52)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.CompositeMediaSource.lambda$prepareChildSource$0$com-google-android-exoplayer2-source-CompositeMediaSource(CompositeMediaSource.java:120)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.CompositeMediaSource$$ExternalSyntheticLambda0.onSourceInfoRefreshed(D8$$SyntheticClass:0)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.BaseMediaSource.refreshSourceInfo(BaseMediaSource.java:94)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.ConcatenatingMediaSource.updateTimelineAndScheduleOnCompletionActions(ConcatenatingMediaSource.java:746)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.ConcatenatingMediaSource.handleMessage(ConcatenatingMediaSource.java:716)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.ConcatenatingMediaSource.$r8$lambda$xvlxaabNVihM68DRWdn_WPenrXk(ConcatenatingMediaSource.java)
E/ExoPlayerImplInternal(11191): at com.google.android.exoplayer2.source.ConcatenatingMediaSource$$ExternalSyntheticLambda0.handleMessage(D8$$SyntheticClass:0)
E/ExoPlayerImplInternal(11191): ... 3 more 这个主要是播放时长不一致无法同步时序导致下一篇再讨论如何解决此类情况。
