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Add positionning cues to WebVTT writer

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This commit is contained in:
MrTimscampi 2020-05-09 19:49:55 +02:00
parent f33876e7e3
commit a262ecd9c7
1 changed files with 13 additions and 2 deletions
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15
MediaBrowser.MediaEncoding/Subtitles/VttWriter.cs
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@ -7,14 +7,25 @@ using MediaBrowser.Model.MediaInfo;
namespace MediaBrowser.MediaEncoding.Subtitles namespace MediaBrowser.MediaEncoding.Subtitles
{ {
/// <summary>
/// Subtitle writer for the WebVTT format.
/// </summary>
public class VttWriter : ISubtitleWriter public class VttWriter : ISubtitleWriter
{ {
/// <inheritdoc />
public void Write(SubtitleTrackInfo info, Stream stream, CancellationToken cancellationToken) public void Write(SubtitleTrackInfo info, Stream stream, CancellationToken cancellationToken)
{ {
using (var writer = new StreamWriter(stream, Encoding.UTF8, 1024, true)) using (var writer = new StreamWriter(stream, Encoding.UTF8, 1024, true))
{ {
writer.WriteLine("WEBVTT"); writer.WriteLine("WEBVTT");
writer.WriteLine(string.Empty); writer.WriteLine(string.Empty);
writer.WriteLine("REGION");
writer.WriteLine("id:subtitle");
writer.WriteLine("width:80%");
writer.WriteLine("lines:3");
writer.WriteLine("regionanchor:50%,100%");
writer.WriteLine("viewportanchor:50%,90%");
writer.WriteLine(string.Empty);
foreach (var trackEvent in info.TrackEvents) foreach (var trackEvent in info.TrackEvents)
{ {
cancellationToken.ThrowIfCancellationRequested(); cancellationToken.ThrowIfCancellationRequested();
@ -22,13 +33,13 @@ namespace MediaBrowser.MediaEncoding.Subtitles
var startTime = TimeSpan.FromTicks(trackEvent.StartPositionTicks); var startTime = TimeSpan.FromTicks(trackEvent.StartPositionTicks);
var endTime = TimeSpan.FromTicks(trackEvent.EndPositionTicks); var endTime = TimeSpan.FromTicks(trackEvent.EndPositionTicks);
// make sure the start and end times are different and seqential // make sure the start and end times are different and sequential
if (endTime.TotalMilliseconds <= startTime.TotalMilliseconds) if (endTime.TotalMilliseconds <= startTime.TotalMilliseconds)
{ {
endTime = startTime.Add(TimeSpan.FromMilliseconds(1)); endTime = startTime.Add(TimeSpan.FromMilliseconds(1));
} }
writer.WriteLine(@"{0:hh\:mm\:ss\.fff} --> {1:hh\:mm\:ss\.fff}", startTime, endTime); writer.WriteLine(@"{0:hh\:mm\:ss\.fff} --> {1:hh\:mm\:ss\.fff} region:subtitle", startTime, endTime);
var text = trackEvent.Text; var text = trackEvent.Text;