Subforge

Appearance

PAC ​

PAC is a binary subtitle format used by Screen Electronics/Cavena.

Timing ​

  • Frame-based timecodes in HH:MM:SS:FF
  • PAL (25 fps) and NTSC (29.97 fps) supported

Styling ​

  • Control codes for italic and underline are mapped to tags

Parsing ​

ts
import { parsePAC } from 'subforge/pac'
import { unwrap } from 'subforge/core'

const data = new Uint8Array(await fetch('/subs.pac').then(r => r.arrayBuffer()))
const doc = unwrap(parsePAC(data))

Serialization ​

ts
import { toPAC } from 'subforge/pac'

const pac = toPAC(doc, { fps: 25 }) // Uint8Array