diff options
Diffstat (limited to 'tests/Jellyfin.MediaEncoding.Tests/Subtitles')
5 files changed, 138 insertions, 326 deletions
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs index 1f908d7e0e..b03651e5e9 100644 --- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs +++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs @@ -15,13 +15,13 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests using var stream = File.OpenRead("Test Data/example.ass"); var parsed = new SubtitleEditParser(new NullLogger<SubtitleEditParser>()).Parse(stream, "ass"); - Assert.Single(parsed.TrackEvents); - var trackEvent = parsed.TrackEvents[0]; + Assert.Single(parsed.Paragraphs); + var paragraph = parsed.Paragraphs[0]; - Assert.Equal("1", trackEvent.Id); - Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, trackEvent.StartPositionTicks); - Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, trackEvent.EndPositionTicks); - Assert.Equal("{\\pos(400,570)}Like an Angel with pity on nobody" + Environment.NewLine + "The second line in subtitle", trackEvent.Text); + Assert.Equal(1, paragraph.Number); + Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, paragraph.StartTime.TimeSpan.Ticks); + Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, paragraph.EndTime.TimeSpan.Ticks); + Assert.Equal("{\\pos(400,570)}Like an Angel with pity on nobody" + Environment.NewLine + "The second line in subtitle", paragraph.Text); } } } diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/FilterEventsTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/FilterEventsTests.cs deleted file mode 100644 index 5f84e85592..0000000000 --- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/FilterEventsTests.cs +++ /dev/null @@ -1,282 +0,0 @@ -using System; -using AutoFixture; -using AutoFixture.AutoMoq; -using MediaBrowser.MediaEncoding.Subtitles; -using MediaBrowser.Model.MediaInfo; -using Xunit; - -namespace Jellyfin.MediaEncoding.Subtitles.Tests -{ - public class FilterEventsTests - { - private readonly SubtitleEncoder _encoder; - - public FilterEventsTests() - { - var fixture = new Fixture().Customize(new AutoMoqCustomization { ConfigureMembers = true }); - _encoder = fixture.Create<SubtitleEncoder>(); - } - - [Fact] - public void FilterEvents_SubtitleSpanningSegmentBoundary_IsRetained() - { - // Subtitle starts at 5s, ends at 15s. - // Segment requested from 10s to 20s. - // The subtitle is still on screen at 10s and should NOT be dropped. - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Still on screen") - { - StartPositionTicks = TimeSpan.FromSeconds(5).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(15).Ticks - }, - new SubtitleTrackEvent("2", "Next subtitle") - { - StartPositionTicks = TimeSpan.FromSeconds(12).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(17).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(20).Ticks, - preserveTimestamps: true); - - Assert.Equal(2, track.TrackEvents.Count); - Assert.Equal("1", track.TrackEvents[0].Id); - Assert.Equal("2", track.TrackEvents[1].Id); - } - - [Fact] - public void FilterEvents_SubtitleFullyBeforeSegment_IsDropped() - { - // Subtitle starts at 2s, ends at 5s. - // Segment requested from 10s. - // The subtitle ended before the segment — should be dropped. - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Already gone") - { - StartPositionTicks = TimeSpan.FromSeconds(2).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(5).Ticks - }, - new SubtitleTrackEvent("2", "Visible") - { - StartPositionTicks = TimeSpan.FromSeconds(12).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(17).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(20).Ticks, - preserveTimestamps: true); - - Assert.Single(track.TrackEvents); - Assert.Equal("2", track.TrackEvents[0].Id); - } - - [Fact] - public void FilterEvents_SubtitleAfterSegment_IsDropped() - { - // Segment is 10s-20s, subtitle starts at 25s. - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "In range") - { - StartPositionTicks = TimeSpan.FromSeconds(12).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(15).Ticks - }, - new SubtitleTrackEvent("2", "After segment") - { - StartPositionTicks = TimeSpan.FromSeconds(25).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(30).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(20).Ticks, - preserveTimestamps: true); - - Assert.Single(track.TrackEvents); - Assert.Equal("1", track.TrackEvents[0].Id); - } - - [Fact] - public void FilterEvents_PreserveTimestampsFalse_AdjustsTimestamps() - { - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Subtitle") - { - StartPositionTicks = TimeSpan.FromSeconds(15).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(20).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(30).Ticks, - preserveTimestamps: false); - - Assert.Single(track.TrackEvents); - // Timestamps should be shifted back by 10s - Assert.Equal(TimeSpan.FromSeconds(5).Ticks, track.TrackEvents[0].StartPositionTicks); - Assert.Equal(TimeSpan.FromSeconds(10).Ticks, track.TrackEvents[0].EndPositionTicks); - } - - [Fact] - public void FilterEvents_PreserveTimestampsTrue_KeepsOriginalTimestamps() - { - var startTicks = TimeSpan.FromSeconds(15).Ticks; - var endTicks = TimeSpan.FromSeconds(20).Ticks; - - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Subtitle") - { - StartPositionTicks = startTicks, - EndPositionTicks = endTicks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(30).Ticks, - preserveTimestamps: true); - - Assert.Single(track.TrackEvents); - Assert.Equal(startTicks, track.TrackEvents[0].StartPositionTicks); - Assert.Equal(endTicks, track.TrackEvents[0].EndPositionTicks); - } - - [Fact] - public void FilterEvents_SubtitleEndingExactlyAtSegmentStart_IsRetained() - { - // Subtitle ends exactly when the segment begins. - // EndPositionTicks == startPositionTicks means (end - start) == 0, not < 0, - // so SkipWhile stops and the subtitle is retained. - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Boundary subtitle") - { - StartPositionTicks = TimeSpan.FromSeconds(5).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(10).Ticks - }, - new SubtitleTrackEvent("2", "In range") - { - StartPositionTicks = TimeSpan.FromSeconds(12).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(15).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(20).Ticks, - preserveTimestamps: true); - - Assert.Equal(2, track.TrackEvents.Count); - Assert.Equal("1", track.TrackEvents[0].Id); - } - - [Fact] - public void FilterEvents_SpanningBoundaryWithTimestampAdjustment_DoesNotProduceNegativeTimestamps() - { - // Subtitle starts at 5s, ends at 15s. - // Segment requested from 10s to 20s, preserveTimestamps = false. - // The subtitle spans the boundary and is retained, but shifting - // StartPositionTicks by -10s would produce -5s (negative). - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Spans boundary") - { - StartPositionTicks = TimeSpan.FromSeconds(5).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(15).Ticks - }, - new SubtitleTrackEvent("2", "Fully in range") - { - StartPositionTicks = TimeSpan.FromSeconds(12).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(17).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: TimeSpan.FromSeconds(20).Ticks, - preserveTimestamps: false); - - Assert.Equal(2, track.TrackEvents.Count); - // Subtitle 1: start should be clamped to 0, not -5s - Assert.True(track.TrackEvents[0].StartPositionTicks >= 0, "StartPositionTicks must not be negative"); - Assert.Equal(TimeSpan.FromSeconds(5).Ticks, track.TrackEvents[0].EndPositionTicks); - // Subtitle 2: normal shift (12s - 10s = 2s, 17s - 10s = 7s) - Assert.Equal(TimeSpan.FromSeconds(2).Ticks, track.TrackEvents[1].StartPositionTicks); - Assert.Equal(TimeSpan.FromSeconds(7).Ticks, track.TrackEvents[1].EndPositionTicks); - } - - [Fact] - public void FilterEvents_NoEndTimeTicks_ReturnsAllFromStartPosition() - { - var track = new SubtitleTrackInfo - { - TrackEvents = new[] - { - new SubtitleTrackEvent("1", "Before") - { - StartPositionTicks = TimeSpan.FromSeconds(2).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(4).Ticks - }, - new SubtitleTrackEvent("2", "After") - { - StartPositionTicks = TimeSpan.FromSeconds(12).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(15).Ticks - }, - new SubtitleTrackEvent("3", "Much later") - { - StartPositionTicks = TimeSpan.FromSeconds(500).Ticks, - EndPositionTicks = TimeSpan.FromSeconds(505).Ticks - } - } - }; - - _encoder.FilterEvents( - track, - startPositionTicks: TimeSpan.FromSeconds(10).Ticks, - endTimeTicks: 0, - preserveTimestamps: true); - - Assert.Equal(2, track.TrackEvents.Count); - Assert.Equal("2", track.TrackEvents[0].Id); - Assert.Equal("3", track.TrackEvents[1].Id); - } - } -} diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs index b7152961cd..01a35e6cb0 100644 --- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs +++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs @@ -15,19 +15,19 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests using var stream = File.OpenRead("Test Data/example.srt"); var parsed = new SubtitleEditParser(new NullLogger<SubtitleEditParser>()).Parse(stream, "srt"); - Assert.Equal(2, parsed.TrackEvents.Count); - - var trackEvent1 = parsed.TrackEvents[0]; - Assert.Equal("1", trackEvent1.Id); - Assert.Equal(TimeSpan.Parse("00:02:17.440", CultureInfo.InvariantCulture).Ticks, trackEvent1.StartPositionTicks); - Assert.Equal(TimeSpan.Parse("00:02:20.375", CultureInfo.InvariantCulture).Ticks, trackEvent1.EndPositionTicks); - Assert.Equal("Senator, we're making" + Environment.NewLine + "our final approach into Coruscant.", trackEvent1.Text); - - var trackEvent2 = parsed.TrackEvents[1]; - Assert.Equal("2", trackEvent2.Id); - Assert.Equal(TimeSpan.Parse("00:02:20.476", CultureInfo.InvariantCulture).Ticks, trackEvent2.StartPositionTicks); - Assert.Equal(TimeSpan.Parse("00:02:22.501", CultureInfo.InvariantCulture).Ticks, trackEvent2.EndPositionTicks); - Assert.Equal("Very good, Lieutenant.", trackEvent2.Text); + Assert.Equal(2, parsed.Paragraphs.Count); + + var paragraph1 = parsed.Paragraphs[0]; + Assert.Equal(1, paragraph1.Number); + Assert.Equal(TimeSpan.Parse("00:02:17.440", CultureInfo.InvariantCulture).Ticks, paragraph1.StartTime.TimeSpan.Ticks); + Assert.Equal(TimeSpan.Parse("00:02:20.375", CultureInfo.InvariantCulture).Ticks, paragraph1.EndTime.TimeSpan.Ticks); + Assert.Equal("Senator, we're making" + Environment.NewLine + "our final approach into Coruscant.", paragraph1.Text); + + var paragraph2 = parsed.Paragraphs[1]; + Assert.Equal(2, paragraph2.Number); + Assert.Equal(TimeSpan.Parse("00:02:20.476", CultureInfo.InvariantCulture).Ticks, paragraph2.StartTime.TimeSpan.Ticks); + Assert.Equal(TimeSpan.Parse("00:02:22.501", CultureInfo.InvariantCulture).Ticks, paragraph2.EndTime.TimeSpan.Ticks); + Assert.Equal("Very good, Lieutenant.", paragraph2.Text); } [Fact] @@ -36,19 +36,19 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests using var stream = File.OpenRead("Test Data/example2.srt"); var parsed = new SubtitleEditParser(new NullLogger<SubtitleEditParser>()).Parse(stream, "srt"); - Assert.Equal(2, parsed.TrackEvents.Count); - - var trackEvent1 = parsed.TrackEvents[0]; - Assert.Equal("311", trackEvent1.Id); - Assert.Equal(TimeSpan.Parse("00:16:46.465", CultureInfo.InvariantCulture).Ticks, trackEvent1.StartPositionTicks); - Assert.Equal(TimeSpan.Parse("00:16:49.009", CultureInfo.InvariantCulture).Ticks, trackEvent1.EndPositionTicks); - Assert.Equal("Una vez que la gente se entere" + Environment.NewLine + Environment.NewLine + "de que ustedes están aquí,", trackEvent1.Text); - - var trackEvent2 = parsed.TrackEvents[1]; - Assert.Equal("312", trackEvent2.Id); - Assert.Equal(TimeSpan.Parse("00:16:49.092", CultureInfo.InvariantCulture).Ticks, trackEvent2.StartPositionTicks); - Assert.Equal(TimeSpan.Parse("00:16:51.470", CultureInfo.InvariantCulture).Ticks, trackEvent2.EndPositionTicks); - Assert.Equal("este lugar se convertirá" + Environment.NewLine + Environment.NewLine + "en un maldito zoológico.", trackEvent2.Text); + Assert.Equal(2, parsed.Paragraphs.Count); + + var paragraph1 = parsed.Paragraphs[0]; + Assert.Equal(311, paragraph1.Number); + Assert.Equal(TimeSpan.Parse("00:16:46.465", CultureInfo.InvariantCulture).Ticks, paragraph1.StartTime.TimeSpan.Ticks); + Assert.Equal(TimeSpan.Parse("00:16:49.009", CultureInfo.InvariantCulture).Ticks, paragraph1.EndTime.TimeSpan.Ticks); + Assert.Equal("Una vez que la gente se entere" + Environment.NewLine + Environment.NewLine + "de que ustedes están aquí,", paragraph1.Text); + + var paragraph2 = parsed.Paragraphs[1]; + Assert.Equal(312, paragraph2.Number); + Assert.Equal(TimeSpan.Parse("00:16:49.092", CultureInfo.InvariantCulture).Ticks, paragraph2.StartTime.TimeSpan.Ticks); + Assert.Equal(TimeSpan.Parse("00:16:51.470", CultureInfo.InvariantCulture).Ticks, paragraph2.EndTime.TimeSpan.Ticks); + Assert.Equal("este lugar se convertirá" + Environment.NewLine + Environment.NewLine + "en un maldito zoológico.", paragraph2.Text); } } } diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs index 5b7aa7eaa9..d814088593 100644 --- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs +++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs @@ -20,19 +20,19 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests { using Stream stream = new MemoryStream(Encoding.UTF8.GetBytes(ssa)); - SubtitleTrackInfo subtitleTrackInfo = _parser.Parse(stream, "ssa"); + var subtitle = _parser.Parse(stream, "ssa"); - Assert.Equal(expectedSubtitleTrackEvents.Count, subtitleTrackInfo.TrackEvents.Count); + Assert.Equal(expectedSubtitleTrackEvents.Count, subtitle.Paragraphs.Count); for (int i = 0; i < expectedSubtitleTrackEvents.Count; ++i) { SubtitleTrackEvent expected = expectedSubtitleTrackEvents[i]; - SubtitleTrackEvent actual = subtitleTrackInfo.TrackEvents[i]; + var actual = subtitle.Paragraphs[i]; - Assert.Equal(expected.Id, actual.Id); + Assert.Equal(expected.Id, actual.Number.ToString(CultureInfo.InvariantCulture)); Assert.Equal(expected.Text, actual.Text); - Assert.Equal(expected.StartPositionTicks, actual.StartPositionTicks); - Assert.Equal(expected.EndPositionTicks, actual.EndPositionTicks); + Assert.Equal(expected.StartPositionTicks, actual.StartTime.TimeSpan.Ticks); + Assert.Equal(expected.EndPositionTicks, actual.EndTime.TimeSpan.Ticks); } } @@ -75,13 +75,13 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests using var stream = File.OpenRead("Test Data/example.ssa"); var parsed = _parser.Parse(stream, "ssa"); - Assert.Single(parsed.TrackEvents); - var trackEvent = parsed.TrackEvents[0]; + Assert.Single(parsed.Paragraphs); + var paragraph = parsed.Paragraphs[0]; - Assert.Equal("1", trackEvent.Id); - Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, trackEvent.StartPositionTicks); - Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, trackEvent.EndPositionTicks); - Assert.Equal("{\\pos(400,570)}Like an angel with pity on nobody", trackEvent.Text); + Assert.Equal(1, paragraph.Number); + Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, paragraph.StartTime.TimeSpan.Ticks); + Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, paragraph.EndTime.TimeSpan.Ticks); + Assert.Equal("{\\pos(400,570)}Like an angel with pity on nobody", paragraph.Text); } } } diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs index ce1f005f40..2d0fa29c9a 100644 --- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs +++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs @@ -1,3 +1,8 @@ +using System; +using System.Globalization; +using System.IO; +using System.Linq; +using System.Text; using System.Threading; using System.Threading.Tasks; using AutoFixture; @@ -6,12 +11,16 @@ using MediaBrowser.MediaEncoding.Subtitles; using MediaBrowser.Model.Dto; using MediaBrowser.Model.Entities; using MediaBrowser.Model.MediaInfo; +using Microsoft.Extensions.Logging.Abstractions; using Xunit; namespace Jellyfin.MediaEncoding.Subtitles.Tests { public class SubtitleEncoderTests { + private const int StreamCount = 8; + private const int CueCount = 500; + public static TheoryData<MediaSourceInfo, MediaStream, SubtitleEncoder.SubtitleInfo> GetReadableFile_Valid_TestData() { var data = new TheoryData<MediaSourceInfo, MediaStream, SubtitleEncoder.SubtitleInfo>(); @@ -103,5 +112,90 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests Assert.Equal(subtitleInfo.Format, result.Format); Assert.Equal(subtitleInfo.IsExternal, result.IsExternal); } + + [Fact] + public void ConvertSubtitles_SequentialCalls_AreDeterministic() + { + using var encoder = CreateEncoder(); + var sources = GenerateSources(); + + var first = ConvertAllSequential(encoder, sources); + var second = ConvertAllSequential(encoder, sources); + + for (var i = 0; i < StreamCount; i++) + { + Assert.Contains($"S{i}C{CueCount - 1}", first[i], StringComparison.Ordinal); + Assert.Equal(first[i], second[i]); + } + } + + [Fact] + public async Task ConvertSubtitles_ConcurrentCalls_MatchSequentialBaseline() + { + const int Iterations = 10; + + using var encoder = CreateEncoder(); + var sources = GenerateSources(); + var baseline = ConvertAllSequential(encoder, sources); + + for (var iteration = 0; iteration < Iterations; iteration++) + { + var results = await Task.WhenAll(Enumerable.Range(0, StreamCount) + .Select(i => Task.Run(() => Convert(encoder, sources[i], i))) + .ToArray()); + + for (var i = 0; i < StreamCount; i++) + { + Assert.True( + string.Equals(baseline[i], results[i], StringComparison.Ordinal), + $"Iteration {iteration}: stream {i} returned corrupted content ({results[i].Length} chars vs {baseline[i].Length} baseline)"); + } + } + } + + private static SubtitleEncoder CreateEncoder() + { + var fixture = new Fixture().Customize(new AutoMoqCustomization { ConfigureMembers = true }); + fixture.Inject<ISubtitleParser>(new SubtitleEditParser(NullLogger<SubtitleEditParser>.Instance)); + return fixture.Create<SubtitleEncoder>(); + } + + private static byte[][] GenerateSources() + { + return Enumerable.Range(0, StreamCount) + .Select(i => Encoding.UTF8.GetBytes(GenerateSrt(i, CueCount))) + .ToArray(); + } + + private static string Convert(SubtitleEncoder encoder, byte[] source, int streamIndex) + { + using var input = new MemoryStream(source); + var info = new SubtitleEncoder.SubtitleInfo { Path = $"track{streamIndex}.srt", Format = "srt" }; + using var output = encoder.ConvertSubtitles(input, info, "vtt", 0, 0, false); + return Encoding.UTF8.GetString(output.ToArray()); + } + + private static string[] ConvertAllSequential(SubtitleEncoder encoder, byte[][] sources) + { + return sources.Select((source, i) => Convert(encoder, source, i)).ToArray(); + } + + private static string GenerateSrt(int streamIndex, int cueCount) + { + var builder = new StringBuilder(); + for (var i = 0; i < cueCount; i++) + { + var start = TimeSpan.FromSeconds(i * 4); + var end = start + TimeSpan.FromSeconds(2); + builder.Append(i + 1).AppendLine() + .Append(start.ToString(@"hh\:mm\:ss\,fff", CultureInfo.InvariantCulture)) + .Append(" --> ") + .AppendLine(end.ToString(@"hh\:mm\:ss\,fff", CultureInfo.InvariantCulture)) + .Append('S').Append(streamIndex).Append('C').Append(i).AppendLine() + .AppendLine(); + } + + return builder.ToString(); + } } } |