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54 lines
1.9 KiB
Markdown
54 lines
1.9 KiB
Markdown
---
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id: TASK-83
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title: 'Jellyfin subtitle delay: shift to adjacent cue without seek jumps'
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status: Done
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assignee: []
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created_date: '2026-03-02 00:06'
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updated_date: '2026-03-02 00:06'
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labels: []
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dependencies: []
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priority: high
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ordinal: 9003
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---
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## Description
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<!-- SECTION:DESCRIPTION:BEGIN -->
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Add keybinding-friendly special commands that shift `sub-delay` to align current subtitle start with next/previous cue start, without `sub-seek` probing (avoid playback jump).
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Scope:
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- add special commands for next/previous line alignment;
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- compute delta from active subtitle cue timeline (external subtitle file/URL, including Jellyfin-delivered URLs);
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- apply `add sub-delay <delta>` and show OSD value;
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- keep existing proxy OSD behavior for direct `sub-delay` keybinding commands.
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<!-- SECTION:DESCRIPTION:END -->
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## Acceptance Criteria
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<!-- AC:BEGIN -->
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- [x] #1 New special commands exist for subtitle-delay shift to next/previous cue boundary.
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- [x] #2 Shift logic parses active external subtitle source timings (SRT/VTT/ASS) and computes delta from current `sub-start`.
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- [x] #3 Runtime applies delay shift without `sub-seek` and shows OSD feedback.
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- [x] #4 Direct `sub-delay` proxy commands also show OSD current value.
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- [x] #5 Tests added for cue parsing/shift behavior and IPC dispatch wiring.
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<!-- AC:END -->
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## Final Summary
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<!-- SECTION:FINAL_SUMMARY:BEGIN -->
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Implemented no-jump subtitle-delay alignment commands:
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- added `__sub-delay-next-line` and `__sub-delay-prev-line` special commands;
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- added `createShiftSubtitleDelayToAdjacentCueHandler` to parse cue start times from active external subtitle source and apply `add sub-delay` delta from current `sub-start`;
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- wired command handling through IPC runtime deps into main runtime;
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- retained/extended OSD proxy feedback for `sub-delay` keybindings;
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- updated configuration docs and added regression tests for subtitle-delay shift and IPC command routing.
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<!-- SECTION:FINAL_SUMMARY:END -->
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