jellyfin/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs, branch v12.0-rc4

Fix race condition in concurrent subtitle conversion

2026-07-15T12:55:55Z

SubtitleEncoder.ConvertSubtitles parsed subtitles with libse's static Subtitle.Parse, which iterates a statically cached list of shared SubtitleFormat instances. Format parsers keep mutable per-parse state on the instance, so concurrent subtitle requests corrupted each other's output (cues mixed across streams and languages, truncated files) or failed with NullReferenceException when format detection broke down and Subtitle.Parse returned null. Parse through the injected ISubtitleParser instead. SubtitleEditParser instantiates a fresh format parser per call, so requests no longer share state. Its Parse method now returns the libse Subtitle directly (the SubtitleTrackInfo flattening was unused since the SubtitleEdit writer rework) so the writers keep full fidelity such as ASS styling.

Removed nesting levels through block-scoped `using` statement (#10025)

2023-09-11T10:12:40Z

Co-authored-by: John Doe Co-authored-by: Lehonti Ramos

Remove redundant using directives

2022-09-28T14:26:03Z

Backport pull request #8087 from jellyfin/release-10.8.z

2022-08-01T18:25:42Z

feat: make subtitleeditparser generic Authored-by: Claus Vium Merged-by: Bond-009 Original-merge: 7323ccfc232d31797af3ceb8bad93cae1ea0898d

Fix tests on windows

2021-02-09T14:12:43Z

Log subtitle errors

2021-02-09T14:12:43Z

Use SubtitleEdit to parse subtitles

2021-02-09T14:12:41Z

Add tests for ass parser

2020-12-28T14:33:36Z