Captions

Kinema keeps captions on caption tracks in the sequence, shown in their own area above the video tracks (as Premiere does). Caption tracks are saved in the .fcproj (project format version 2; version 1 projects open with no caption tracks).

Model

Caption track (CaptionTrack, crates/project/src/caption.rs): name, format (Subtitle, CEA-608, CEA-708, Teletext), language, output eye (shown in the Program monitor and burned in on export), lock, sync lock, and a track style: font size (pixels at 1080 lines, scaled to the frame), text colour, background box and its colour, outline width and colour, alignment (left/centre/right), position (top/middle/bottom) and margin (a fraction of the frame height, default 0.08; captions.setStyle clamps it to 0–0.45), line spacing.
Caption: in/out in exact Ticks, text (lines separated by \n; <i>, <b>, <u> kept as written), optional speaker, and the WebVTT cue id and cue settings, kept for round trips. Captions on a track never overlap.

Files

Format	Import	Export	Notes
SubRip `.srt`	✓	✓	Forgiving reader (BOM, UTF-16, Windows-1252, CRLF, missing indexes, `,`/`.` ms, missing hours).
WebVTT `.vtt`	✓	✓	Keeps cue ids, cue settings, `<v Speaker>`, STYLE/REGION/NOTE blocks. `line:N%` and `align:` are honoured when drawing.
Scenarist SCC `.scc`	✓	✓	CEA-608 at 29.97 fps. Reads pop-on, roll-up and paint-on; writes pop-on with drop-frame (default) or non-drop timecode.

File ▸ Import (or dropping a file) recognises caption files by extension and content and adds a new caption track to the open sequence (a sequence is created when none is open). Cue times are snapped to the sequence's frames. File ▸ Export ▸ Captions… writes the chosen caption track in the format given by the file extension (.srt, .vtt, .scc).

Details of each format and the SCC encoder are in crates/captions/README.md.

Editing

Command	Menu / shortcut	Params
`captions.newTrack`	Sequence ▸ Captions ▸ Add New Caption Track… (⌥⌘A)	`format`, `name`, `language`
`captions.add`	Sequence ▸ Captions ▸ Add Caption at Playhead (⌥⌘C)	`track`, `text`, `time`, `durationSeconds` (3)
`captions.next` / `captions.previous`	Sequence ▸ Captions ▸ Go to Next/Previous Caption Segment (⌥⌘↓/↑)
`captions.showAll` / `captions.hideAll`	Sequence ▸ Captions
`captions.split`	Text panel ✂; Razor tool on a caption (⇧: every caption track)	`caption`, `time` (default: every caption under the playhead)
`captions.merge`	Text panel	`captions` (consecutive, one track)
`captions.setText`	Text panel text field	`caption`, `text`, `speaker`
`captions.setTimes`	Text panel in/out fields	`caption`, `start…`/`end…` (`Time` ticks, `Frame`, `Seconds`, `Timecode`)
`captions.trim`	drag a caption edge in the timeline	`caption`, `edge` (`in`/`out`), `delta` or `deltaFrames`
`captions.move`	drag a caption in the timeline	`captions`, `delta` or `deltaFrames`
`captions.duplicate`	⌥-drag a caption in the timeline	`captions`, `delta` or `deltaFrames` — copies on the same tracks, overwriting what is there
`captions.delete`	Edit ▸ Clear / Ripple Delete with captions selected	`captions`, `ripple`
`edit.copy` / `edit.cut` / `edit.paste` / `edit.pasteInsert`	⌘C / ⌘X / ⌘V / ⇧⌘V with only captions selected	captions paste at the playhead on the tracks they came from, overwriting (Paste Insert pushes later captions on); Paste places whichever of clips or captions was copied last
`captions.select`, `captions.goTo`	click / number button	`captions`, `add` / `caption`
`captions.setTrack`	caption track header (eye, lock)	`track`, `name`, `format`, `language`, `enabled`, `locked`, `syncLock`
`captions.setStyle`	Text panel style strip	`track`, `size`, `color`, `background`, `backgroundColor`, `outline`, `outlineColor`, `align`, `anchor`, `margin`, `lineSpacing`, `reset`
`captions.deleteTrack`		`track`
`captions.import` / `captions.export`	File ▸ Export ▸ Captions…	`path`, `format`, `track`, `dropFrame`
`captions.list`	(query)	`track` — tracks, styles and captions with timecodes (a `track` that names no caption track is an error)

Tracks are addressed by id or "C1", "C2"… (top first). Edits are limited by neighbouring captions and a one-frame minimum. Sync-locked caption tracks follow insert and extract edits on the media tracks (a caption across an insert point is split). Add Edit to All Tracks (⇧⌘K) also splits captions.

Timeline and Text panel

Caption rows: header with C1… badge, lock, output eye, name and format; caption blocks in violet showing their text (Arabic and Hebrew in reading order from the block's right edge). Click selects (⌘/⇧ adds), drag moves (the whole selection; ⌥-drag copies), edge drag trims, the Razor tool cuts, double-click opens the Text panel. Automation ids: timeline.caption.<id>, timeline.captionTrack.C1[.locked|.enabled].
Text panel ▸ Captions: search, track picker (also creates tracks of each format), add / split / merge / delete / export buttons, the list of segments with editable in/out timecodes and text (committed when the field loses focus; Arabic and Hebrew show in reading order and are edited in logical order while the field has focus), and the track style strip (size, colour, box, alignment, position). The list keeps the caption under the playhead in view (centred as the playhead reaches it, not while a field is being edited). Automation ids: text.tab.Captions, text.captions.add|split|merge|delete|export|search|track, text.captions.<id>.in|out|text|goto|row, text.captions.style.*.

Burn-in

The Program monitor shows the visible caption tracks. On export, file.exportMedia {"burnCaptions": true} (Export mode: Burn Captions Into Video) draws them into every frame. Captions are set in Inter SemiBold (OFL, bundled) by the text engine (crates/text: shaping, kerning, bidi); italics/bold markup is not yet drawn differently. The captions of a nested sequence are part of the nest's picture: they are drawn wherever the nest is shown, in the Program monitor and in every export, whether or not the outer sequence shows or burns in its own.