Sideload字幕在埃法层中不起作用

Question

我正在尝试用视频局限一个字幕文件，但它不起作用。

代码：

private MediaSource buildMediaSourceWithSubtitle(Uri uri, @Nullable String overrideExtension, Uri subtitle) {
    Format subtitleFormat = Format.createTextSampleFormat(null, MimeTypes.APPLICATION_SUBRIP, 0, null);
    MediaSource subtitleSource = new SingleSampleMediaSource.Factory(dataSourceFactory).createMediaSource(subtitle, subtitleFormat, C.TIME_UNSET);
    MediaSource mediaSource = null;
    @ContentType int type = Util.inferContentType(uri, overrideExtension);
    switch (type) {
    case C.TYPE_DASH:
        mediaSource = new DashMediaSource.Factory(dataSourceFactory).setManifestParser(
        new FilteringManifestParser < >(new DashManifestParser(), getOfflineStreamKeys(uri))).createMediaSource(uri);
        return new MergingMediaSource(mediaSource, subtitleSource);
    case C.TYPE_SS:
        mediaSource = new SsMediaSource.Factory(dataSourceFactory).setManifestParser(
        new FilteringManifestParser < >(new SsManifestParser(), getOfflineStreamKeys(uri))).createMediaSource(uri);
        return new MergingMediaSource(mediaSource, subtitleSource);
    case C.TYPE_HLS:
        mediaSource = new HlsMediaSource.Factory(dataSourceFactory).setPlaylistParserFactory(
        new DefaultHlsPlaylistParserFactory(getOfflineStreamKeys(uri))).createMediaSource(uri);
        return new MergingMediaSource(mediaSource, subtitleSource);
    case C.TYPE_OTHER:
        mediaSource = new ExtractorMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
        return new MergingMediaSource(mediaSource, subtitleSource);
    default:
        {
            throw new IllegalStateException("Unsupported type: " + type);
        }
    }
}

Answer 1

mediaSource videosource = new drestrormediasource（        Viviori，        datasourceFactory，        新的DefaultExtractorsFactory（），        无效的，        无效的）;格式subtitleformat =格式。        无效的，        mimetypes.application_subrip，        C.Selectionflags，        " en"）;MediaSource textMediasource =新的单次amplemediasource（    uri.parse（" http://www.storiesinflight.com/js_videosub/jellies.srt"），    datasourceFactory，    subtitleformat，    C.Time_unset）;source = new MygingMediasource（VideoSource，textMediasource）;//以后使用//嵌套到具有subtitleview作为成员的某些类类Somelistener工具...，TexTrenderer.Output，... {    ...       //此功能似乎没有被调用    公共空白（列表提示）{       //在这里登录一些        如果（subtitleview！= null）{        subtitleview.oncues（cues）;        }    }    ...}player.setTextOutput（侦听器）;...//稍后，播放视频，假设其准备好了player.setplayWhenReady（true）; 

Answer 2

在exoplayer 2.16.1中我使用了此代码并正常工作：

val subtitle = MediaItem.SubtitleConfiguration.Builder(srtUri)
    .setMimeType(MimeTypes.APPLICATION_SUBRIP)
    .setLanguage("en")
    .setSelectionFlags(C.SELECTION_FLAG_DEFAULT)
    .build()
val mediaItem = MediaItem.Builder()
    .setUri(videoUrl)
    .setSubtitleConfigurations(ImmutableList.of(subtitle))
    .build()
player?.setMediaItem(mediaItem)