如何在Exoplayer android中向视频添加字幕（.SRT文件）？

Question

我正在一个项目中，我应该在Android中播放.srt文件以及视频。我正在研究Exoplayer的示例，但是无法播放带视频的.srt文件。

我使用的代码是

MediaSource mediaSource = new HlsMediaSource(Uri.parse("https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8"),
                mediaDataSourceFactory, mainHandler, null);

         Format textFormat = Format.createTextSampleFormat(null, MimeTypes.APPLICATION_SUBRIP,
                null, Format.NO_VALUE, Format.NO_VALUE, "en", null);

        Uri uri = Uri.parse("http://www.storiesinflight.com/js_videosub/jellies.srt");


        MediaSource subtitleSource = new SingleSampleMediaSource(uri, mediaDataSourceFactory, textFormat, C.TIME_UNSET);
// Plays the video with the sideloaded subtitle.
        MergingMediaSource mergedSource =
                new MergingMediaSource(mediaSource, subtitleSource);

        player.prepare(mergedSource);

任何人都可以为我提出解决方案或与此相同的任何教程链接。非常感激你的帮助 ！

Answer 1

我只是编辑 exoplayer 示例，其中有 Player 活动，例如......并且它对我有用......

 private void initializePlayer() {
        Intent intent = getIntent();
        if (player == null) {
            boolean preferExtensionDecoders = intent.getBooleanExtra(PREFER_EXTENSION_DECODERS, false);
            UUID drmSchemeUuid = intent.hasExtra(DRM_SCHEME_UUID_EXTRA)
                    ? UUID.fromString(intent.getStringExtra(DRM_SCHEME_UUID_EXTRA)) : null;
            DrmSessionManager<FrameworkMediaCrypto> drmSessionManager = null;
            if (drmSchemeUuid != null) {
                String drmLicenseUrl = intent.getStringExtra(DRM_LICENSE_URL);
                String[] keyRequestPropertiesArray = intent.getStringArrayExtra(DRM_KEY_REQUEST_PROPERTIES);
                Map<String, String> keyRequestProperties;
                if (keyRequestPropertiesArray == null || keyRequestPropertiesArray.length < 2) {
                    keyRequestProperties = null;
                } else {
                    keyRequestProperties = new HashMap<>();
                    for (int i = 0; i < keyRequestPropertiesArray.length - 1; i += 2) {
                        keyRequestProperties.put(keyRequestPropertiesArray[i],
                                keyRequestPropertiesArray[i + 1]);
                    }
                }
                try {
                    drmSessionManager = buildDrmSessionManager(drmSchemeUuid, drmLicenseUrl,
                            keyRequestProperties);
                } catch (UnsupportedDrmException e) {
                    int errorStringId = Util.SDK_INT < 18 ? R.string.error_drm_not_supported
                            : (e.reason == UnsupportedDrmException.REASON_UNSUPPORTED_SCHEME
                            ? R.string.error_drm_unsupported_scheme : R.string.error_drm_unknown);
                    showToast(errorStringId);
                    return;
                }
            }

            @SimpleExoPlayer.ExtensionRendererMode int extensionRendererMode =
                    ((AppController) getApplication()).useExtensionRenderers()
                            ? (preferExtensionDecoders ? SimpleExoPlayer.EXTENSION_RENDERER_MODE_PREFER
                            : SimpleExoPlayer.EXTENSION_RENDERER_MODE_ON)
                            : SimpleExoPlayer.EXTENSION_RENDERER_MODE_OFF;
            TrackSelection.Factory videoTrackSelectionFactory =
                    new AdaptiveVideoTrackSelection.Factory(BANDWIDTH_METER);
            trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
            trackSelectionHelper = new TrackSelectionHelper(trackSelector, videoTrackSelectionFactory);
            player = ExoPlayerFactory.newSimpleInstance(this, trackSelector, new DefaultLoadControl(),
                    drmSessionManager, extensionRendererMode);
            player.addListener(this);

            eventLogger = new EventLogger(trackSelector);
            player.addListener(eventLogger);
            player.setAudioDebugListener(eventLogger);
            player.setVideoDebugListener(eventLogger);
            player.setMetadataOutput(eventLogger);

            simpleExoPlayerView.setPlayer(player);
            player.setPlayWhenReady(shouldAutoPlay);
            debugViewHelper = new DebugTextViewHelper(player, debugTextView);
            debugViewHelper.start();
            playerNeedsSource = true;


        }
        if (playerNeedsSource) {
            String action = intent.getAction();
            Log.d("URL action: ", action);
            Uri[] uris;
            String[] extensions;
            if (ACTION_VIEW.equals(action)) {
                uris = new Uri[] {intent.getData()};
                extensions = new String[] {intent.getStringExtra(EXTENSION_EXTRA)};
            } else if (ACTION_VIEW_LIST.equals(action)) {
                String[] uriStrings = intent.getStringArrayExtra(URI_LIST_EXTRA);
                uris = new Uri[uriStrings.length];
                for (int i = 0; i < uriStrings.length; i++) {
                    uris[i] = Uri.parse(uriStrings[i]);
                    Log.d("URL action2: ", String.valueOf(uris[i])+" ");
                }
                extensions = intent.getStringArrayExtra(EXTENSION_LIST_EXTRA);
                if (extensions == null) {
                    extensions = new String[uriStrings.length];
                }
            } else {
                showToast(getString(R.string.unexpected_intent_action, action));
                return;
            }
            if (Util.maybeRequestReadExternalStoragePermission(this, uris)) {
                // The player will be reinitialized if the permission is granted.
                return;
            }
            MediaSource[] mediaSources = new MediaSource[uris.length];
            for (int i = 0; i < uris.length; i++) {
                mediaSources[i] = buildMediaSource(uris[i], extensions[i]);
                Log.d("URL action extensions: ", String.valueOf( extensions[i]));
            }
            MediaSource mediaSource = mediaSources.length == 1 ? mediaSources[0]
                    : new ConcatenatingMediaSource(mediaSources);
            boolean haveResumePosition = resumeWindow != C.INDEX_UNSET;
            if (haveResumePosition) {
                player.seekTo(resumeWindow, resumePosition);
            }
            // edit for subtitle
           // player.prepare(mediaSource, !haveResumePosition, false);
         //   playerNeedsSource = false;
          // player.seekTo(0);
            //updateButtonVisibilities();

           /* MediaSource mediaSource = new HlsMediaSource(Uri.parse("https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8"),
                    mediaDataSourceFactory, mainHandler, null);*/

            Format textFormat = Format.createTextSampleFormat(null, MimeTypes.APPLICATION_SUBRIP,
                    null, Format.NO_VALUE, Format.NO_VALUE, "en", null);

            Uri uri = Uri.parse("http://www.storiesinflight.com/js_videosub/jellies.srt");


            MediaSource subtitleSource = new SingleSampleMediaSource(uri, mediaDataSourceFactory, textFormat, C.TIME_UNSET);
// Plays the video with the sideloaded subtitle.
            MergingMediaSource mergedSource =
                    new MergingMediaSource(mediaSource, subtitleSource);

            player.prepare(mergedSource,!haveResumePosition, false);
            playerNeedsSource = false;
            //player.seekTo(0);
        }


    }