This commit is contained in:
Daniel Hartung 2019-10-11 15:48:28 +02:00
parent adf7b1ae0c
commit 63f804df32

View File

@ -1192,44 +1192,43 @@ define(['browser', 'require', 'events', 'apphost', 'loading', 'dom', 'playbackMa
} }
var trackElement = null; var trackElement = null;
var expectedId = 'manualTrack' + track.Index; if (videoElement.textTracks && videoElement.textTracks.length > 0) {
trackElement = videoElement.textTracks[0];
// get list of tracks // This throws an error in IE, but is fine in chrome
var allTracks = videoElement.textTracks; // In IE it's not necessary anyway because changing the src seems to be enough
for (var i = 0; i < allTracks.length; i++) { try {
var currentTrack = allTracks[i];
if (currentTrack.label === expectedId) {
trackElement = currentTrack;
break;
} else {
currentTrack.mode = 'disabled';
}
}
if (!trackElement) {
trackElement = videoElement.addTextTrack('subtitles', 'manualTrack' + track.Index, track.Language || 'und');
// download the track json
fetchSubtitles(track, item).then(function (data) {
// show in ui
console.log('downloaded ' + data.TrackEvents.length + ' track events');
// add some cues to show the text
// in safari, the cues need to be added before setting the track mode to showing
data.TrackEvents.forEach(function (trackEvent) {
var trackCueObject = window.VTTCue || window.TextTrackCue;
var cue = new trackCueObject(trackEvent.StartPositionTicks / 10000000, trackEvent.EndPositionTicks / 10000000, normalizeTrackEventText(trackEvent.Text));
trackElement.addCue(cue);
});
trackElement.mode = 'showing'; trackElement.mode = 'showing';
}); while (trackElement.cues.length) {
trackElement.removeCue(trackElement.cues[0]);
}
} catch (e) {
console.log('Error removing cue from textTrack');
}
trackElement.mode = 'disabled';
} else { } else {
trackElement.mode = 'showing'; // There is a function addTextTrack but no function for removeTextTrack
// Therefore we add ONE element and replace its cue data
trackElement = videoElement.addTextTrack('subtitles', 'manualTrack', 'und');
} }
// download the track json
fetchSubtitles(track, item).then(function (data) {
// show in ui
console.log('downloaded ' + data.TrackEvents.length + ' track events');
// add some cues to show the text
// in safari, the cues need to be added before setting the track mode to showing
data.TrackEvents.forEach(function (trackEvent) {
var trackCueObject = window.VTTCue || window.TextTrackCue;
var cue = new trackCueObject(trackEvent.StartPositionTicks / 10000000, trackEvent.EndPositionTicks / 10000000, normalizeTrackEventText(trackEvent.Text));
trackElement.addCue(cue);
});
trackElement.mode = 'showing';
});
} }
function updateSubtitleText(timeMs) { function updateSubtitleText(timeMs) {