ExoPlayer未从.srt文件加载字幕

Question

所以我试图在外部层中显示.srt文件中的字幕，但它不起作用。我需要使用单独的字幕视图来显示我的字幕吗？PlayerView中的副标题View是否不够？我使用PlayerView btw.

我使用的外层版本是2.14.0。

addTextOutput方法。

simpleExoPlayer.addTextOutput(cues -> {
playerView.getSubtitleView().setCues(cues);
playerView.getSubtitleView().setVisibility(View.VISIBLE);
playerView.getSubtitleView().onCues(cues);
assert cues.get(0).text != null;
Log.d("subtitles", cues.get(0).text.toString());
});

我还尝试实现到TextOutput，但这也不起作用。

我的sample.srt文件的内容：

1
00:00:00,000 --> 00:00:01,500
For www.forom.com
2
00:00:01,500 --> 00:00:02,500
<i>Tonight's the night.</i>
3
00:00:03,000 --> 00:00:15,000
<i>And it's going to happen
again and again --</i>

我用来加载字幕的功能：

public void buildMediaSourceV3(Uri uri){
String subtitlesUri = sharedPreferencesSubtitles.getString(videoName.getText().toString(), "");
DataSource.Factory factory = new DefaultDataSourceFactory(VideoPlayer.this, getPackageName(), new DefaultBandwidthMeter());
MediaItem mediaItem = MediaItem.fromUri(uri);
MediaSource videoSource = new ProgressiveMediaSource.Factory(factory).createMediaSource(mediaItem);
if(subtitlesUri.equals(""))
{
simpleExoPlayer.addMediaSource(videoSource);
}
else
{
MediaItem.Subtitle subtitle = new  MediaItem.Subtitle(Uri.parse(subtitlesUri), MimeTypes.APPLICATION_SUBRIP, "en");
MediaSource textMediaSource = new SingleSampleMediaSource.Factory(factory).createMediaSource(subtitle, C.TIME_UNSET);
textMediaSource.getMediaItem().mediaMetadata.subtitle.toString();
MergingMediaSource mergingMediaSource = new MergingMediaSource(videoSource, textMediaSource);
simpleExoPlayer.addMediaSource(mergingMediaSource);
}
}

Answer 1

以下是带有SRT字幕的视频/mp4的最小示例。对于XML布局，使用com.google.android.exoplayer2.ui.StyledPlayerView，不需要额外的字幕布局。文件位于项目内的assets目录中。

val playerView = view.findViewById<StyledPlayerView>(R.id.video_pv)
val exoPlayer = ExoPlayer.Builder(requireActivity()).build()
playerView.player = exoPlayer
val assetSrtUri = Uri.parse(("file:///android_asset/subtitle.srt"))
val subtitle = SubtitleConfiguration.Builder(assetSrtUri)
.setMimeType(MimeTypes.APPLICATION_SUBRIP)
.setLanguage("en")
.setSelectionFlags(C.SELECTION_FLAG_DEFAULT)
.build()
val assetVideoUri = Uri.parse(("file:///android_asset/video.mp4"))
val mediaItem = MediaItem.Builder()
.setUri(assetVideoUri)
.setSubtitleConfigurations(ImmutableList.of(subtitle))
.build()
exoPlayer.setMediaItem(mediaItem)
exoPlayer.prepare()
exoPlayer.play()

渐变依赖关系：

implementation "com.google.android.exoplayer:exoplayer:2.17.1"
implementation "com.google.android.exoplayer:exoplayer-core:2.17.1"
implementation "com.google.android.exoplayer:exoplayer-ui:2.17.1"

Answer 2

我知道您已经实现了一个变通方法。

我刚刚遇到了同样的问题，并找到了一个解决方案：

trackSelector.setPreferredTextLanguage

这对我有帮助。完整上下文：

val trackSelector = DefaultTrackSelector(context)
trackSelector.setParameters(trackSelector.buildUponParameters().setPreferredTextLanguage("en"))

更新：我错了。该解决方案只显示视频嵌入字幕，而不显示侧载字幕。

这对我现在有效：

val mediaItemBuilder = MediaItem.Builder()
.setUri(uri))
videoCaption?.vtt?.let {
val uriSubtitle = Uri.parse(it)
val mediaItemSubtitle = MediaItem.Subtitle(uriSubtitle,
MimeTypes.TEXT_VTT,
"en",
C.SELECTION_FLAG_DEFAULT)


mediaItemBuilder.setSubtitles(mutableListOf(mediaItemSubtitle))
}

val mediaItem = mediaItemBuilder.build()
val mediaSource = DefaultMediaSourceFactory(dataSourceFactory, extractoryFactory).createMediaSource(mediaItem)

Answer 3

使用生成器添加字幕。。。

val assetSrtUri = Uri.parse("https:.........")
val subtitle = MediaItem.SubtitleConfiguration.Builder(assetSrtUri)
.setMimeType(MimeTypes.APPLICATION_SUBRIP)
.setLanguage("en")
.setSelectionFlags(C.SELECTION_FLAG_DEFAULT)
.build()
val firstVideoUri = Uri.parse(intent.getStringExtra(ARG_VIDEO_URL))
val firstItem = MediaItem.Builder().setUri(firstVideoUri)
firstItem.setSubtitleConfigurations(ImmutableList.of(subtitle))
player.addMediaItem(firstItem.build())
player.prepare()