# How should I break caption lines and split long sentences across events?

- id: art_01M5P66KJHP5VH4TK0E72PAA4A
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T10, T13 · tags: none
- updated: 2026-10-24T05:30:09.867Z
- url: https://veyrul.com/articles/art_01M5P66KJHP5VH4TK0E72PAA4A

Problem. Auto line wrapping breaks mid-phrase and hurts comprehension. Conditions. Any caption or subtitle with more than one line or event per sentence. Method. Documented: break after punctuation, before conjunctions and before prepositions (Netflix); do not separate article from noun, adjective from noun, first from last name, subject pronoun from verb, prepositional verb from preposition, verb from auxiliary/reflexive/negation. Prefer a bottom-heavy pyramid, avoid one or two words alone on the top line (Netflix English). BBC: ideal break at punctuation; each subtitle should be a single sentence, but a long sentence may extend across several subtitles, segmented at clause boundaries in preference to phrase boundaries; BBC also says well-edited text and timing matter more than perfect line breaks. Netflix: when one sentence continues across continuous subtitles, no ellipsis or dash is used if the pause is under 2 seconds. Example. BBC's own long-sentence example breaks after 'When...

Problem. Auto line wrapping breaks mid-phrase and hurts comprehension. Conditions. Any caption or subtitle with more than one line or event per sentence. Method. Documented: break after punctuation, before conjunctions and before prepositions (Netflix); do not separate article from noun, adjective from noun, first from last name, subject pronoun from verb, prepositional verb from preposition, verb from auxiliary/reflexive/negation. Prefer a bottom-heavy pyramid, avoid one or two words alone on the top line (Netflix English). BBC: ideal break at punctuation; each subtitle should be a single sentence, but a long sentence may extend across several subtitles, segmented at clause boundaries in preference to phrase boundaries; BBC also says well-edited text and timing matter more than perfect line breaks. Netflix: when one sentence continues across continuous subtitles, no ellipsis or dash is used if the pause is under 2 seconds. Example. BBC's own long-sentence example breaks after 'When I jumped on the bus' (clause boundary). Failure modes. Treating the limit as a fixed character count only; BBC notes that proportional fonts make width, not count, decisive. Limitations. Rules are written for English; other Netflix languages have their own rules (see C2-B30-G4-08). Version/date. Pages as fetched 2026-10-24. Inference: an automatic breaker can score candidate breaks by the Netflix 'do not separate' list using a POS tagger or a rule list, and choose the lowest-cost break that satisfies the width limit; none of the sources describes an algorithm.

Curator qualifications: All cited documentation excerpts located on the live pages by curator GET; no video sources.

Limitations: Both guides are English-centric. BBC page wording on width depends on region and font, which an ASR pipeline cannot know without the player.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://partnerhelp.netflixstudios.com/hc/en-us/articles/217350977-English-Timed-Text-Style-Guide",
      "note": "I.10 Line Treatment; 4. Line Treatment; 3.9 Long sentences; 3.10; I.3 Continuity; researcher reasoning"
    },
    {
      "url": "https://partnerhelp.netflixstudios.com/hc/en-us/articles/215758617-Timed-Text-Style-Guide-General-Requirements",
      "note": "I.10 Line Treatment; 4. Line Treatment; 3.9 Long sentences; 3.10; I.3 Continuity; researcher reasoning"
    },
    {
      "url": "https://www.bbc.co.uk/accessibility/forproducts/guides/subtitles",
      "note": "I.10 Line Treatment; 4. Line Treatment; 3.9 Long sentences; 3.10; I.3 Continuity; researcher reasoning"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] Problem. Auto line wrapping breaks mid-phrase and hurts comprehension. Conditions. Any caption or subtitle with more than one line or event per sentence. Method. Documented: break after punctuation, before conjunctions and before prepositions (Netflix); do not separate article from noun, adjective from noun, first from last name, subject pronoun from verb, prepositional verb from preposition, verb from auxiliary/reflexive/negation. Prefer a bottom-heavy pyramid, avoid one or two words alone on the top line (Netflix English). BBC: ideal break at punctuation; each subtitle should be a single sentence, but a long sentence may extend across several subtitles, segmented at clause boundaries in preference to phrase boundaries; BBC also says well-edited text and timing matter more than perfect line breaks. Netflix: when one sentence continues across continuous subtitles, no ellipsis or dash is used if the pause is under 2 seconds. Example. BBC's own long-sentence example breaks after 'When I jumped on the bus' (clause boundary). Failure modes. Treating the limit as a fixed character count only; BBC notes that proportional fonts make width, not count, decisive. Limitations. Rules are written for English; other Netflix languages have their own rules (see C2-B30-G4-08). Version/date. Pages as fetched 2026-10-24. Inference: an automatic breaker can score candidate breaks by the Netflix 'do not separate' list using a POS tagger or a rule list, and choose the lowest-cost break that satisfies the width limit; none of the sources describes an algorithm. · locator: I.10 Line Treatment; 4. Line Treatment; 3.9 Long sentences; 3.10; I.3 Continuity; researcher reasoning · source: https://partnerhelp.netflixstudios.com/hc/en-us/articles/217350977-English-Timed-Text-Style-Guide

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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