diff --git a/src/components/htmlvideoplayer/plugin.js b/src/components/htmlvideoplayer/plugin.js index ac4e8cf6a5..4512fb43d1 100644 --- a/src/components/htmlvideoplayer/plugin.js +++ b/src/components/htmlvideoplayer/plugin.js @@ -575,6 +575,20 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa return showTrackOffset; } + function getTextTrack() { + var videoElement = self._mediaElement; + if (videoElement) { + return Array.from(videoElement.textTracks) + .find(function(trackElement) { + // get showing .vtt textTack + return trackElement.mode === 'showing'; + }); + } else { + // get track events + return currentTrackEvents; + } + } + self.setSubtitleOffset = function(offset) { var offsetValue = parseFloat(offset); @@ -583,28 +597,14 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa if (currentAssRenderer) { updateCurrentTrackOffset(offsetValue); } else { - var videoElement = self._mediaElement; - var mediaStreamTextTracks = getMediaStreamTextTracks(self._currentPlayOptions.mediaSource); - - Array.from(videoElement.textTracks) - .filter(function(trackElement) { - // get showing .vtt textTacks - return trackElement.mode === 'showing'; - }) - .forEach(function(trackElement) { - - var track = customTrackIndex === -1 ? null : mediaStreamTextTracks.filter(function (t) { - return t.Index === customTrackIndex; - })[0]; - - if (track) { - offsetValue = updateCurrentTrackOffset(offsetValue); - setVttSubtitleOffset(trackElement, offsetValue); - } else { - console.log("No available track, cannot apply offset : " + offsetValue); - } - - }); + var trackElement = getTextTrack(); + // if .vtt currently rendering + if (trackElement) { + offsetValue = updateCurrentTrackOffset(offsetValue); + setVttSubtitleOffset(trackElement, offsetValue); + } else { + console.log("No available track, cannot apply offset : " + offsetValue); + } } }; @@ -628,8 +628,12 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa cue.startTime -= offsetValue; cue.endTime -= offsetValue; }); + } else if (Array.isArray(currentTrack)) { + currentTrack.forEach(function(trackEvent) { + trackEvent.StartPositionTicks -= offsetValue; + trackEvent.EndPositionTicks -= offsetValue; + }); } - } self.getSubtitleOffset = function() {