PeerTube/server/core/helpers/captions-utils.ts

56 lines
1.8 KiB
TypeScript

import { createReadStream, createWriteStream } from 'fs'
import { move, remove } from 'fs-extra/esm'
import { join } from 'path'
import { Transform } from 'stream'
import { MVideoCaption } from '@server/types/models/index.js'
import { CONFIG } from '../initializers/config.js'
import { pipelinePromise } from './core-utils.js'
async function moveAndProcessCaptionFile (physicalFile: { filename: string, path: string }, videoCaption: MVideoCaption) {
const videoCaptionsDir = CONFIG.STORAGE.CAPTIONS_DIR
const destination = join(videoCaptionsDir, videoCaption.filename)
// Convert this srt file to vtt
if (physicalFile.path.endsWith('.srt')) {
await convertSrtToVtt(physicalFile.path, destination)
await remove(physicalFile.path)
} else if (physicalFile.path !== destination) { // Just move the vtt file
await move(physicalFile.path, destination, { overwrite: true })
}
// This is important in case if there is another attempt in the retry process
physicalFile.filename = videoCaption.filename
physicalFile.path = destination
}
// ---------------------------------------------------------------------------
export {
moveAndProcessCaptionFile
}
// ---------------------------------------------------------------------------
async function convertSrtToVtt (source: string, destination: string) {
const fixVTT = new Transform({
transform: (chunk, _encoding, cb) => {
let block: string = chunk.toString()
block = block.replace(/(\d\d:\d\d:\d\d)(\s)/g, '$1.000$2')
.replace(/(\d\d:\d\d:\d\d),(\d)(\s)/g, '$1.00$2$3')
.replace(/(\d\d:\d\d:\d\d),(\d\d)(\s)/g, '$1.0$2$3')
return cb(undefined, block)
}
})
const srt2vtt = await import('srt-to-vtt')
return pipelinePromise(
createReadStream(source),
srt2vtt.default(),
fixVTT,
createWriteStream(destination)
)
}