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import { Job } from 'bull'
import ffmpeg, { FfmpegCommand } from 'fluent-ffmpeg'
import { execPromise } from '@server/helpers/core-utils'
import { logger, loggerTagsFactory } from '@server/helpers/logger'
import { CONFIG } from '@server/initializers/config'
import { FFMPEG_NICE } from '@server/initializers/constants'
import { EncoderOptions } from '@shared/models'
const lTags = loggerTagsFactory('ffmpeg')
type StreamType = 'audio' | 'video'
function getFFmpeg (input: string, type: 'live' | 'vod') {
// We set cwd explicitly because ffmpeg appears to create temporary files when trancoding which fails in read-only file systems
const command = ffmpeg(input, {
niceness: type === 'live' ? FFMPEG_NICE.LIVE : FFMPEG_NICE.VOD,
cwd: CONFIG.STORAGE.TMP_DIR
})
const threads = type === 'live'
? CONFIG.LIVE.TRANSCODING.THREADS
: CONFIG.TRANSCODING.THREADS
if (threads > 0) {
// If we don't set any threads ffmpeg will chose automatically
command.outputOption('-threads ' + threads)
}
return command
}
function getFFmpegVersion () {
return new Promise<string>((res, rej) => {
(ffmpeg() as any)._getFfmpegPath((err, ffmpegPath) => {
if (err) return rej(err)
if (!ffmpegPath) return rej(new Error('Could not find ffmpeg path'))
return execPromise(`${ffmpegPath} -version`)
.then(stdout => {
const parsed = stdout.match(/ffmpeg version .?(\d+\.\d+(\.\d+)?)/)
if (!parsed || !parsed[1]) return rej(new Error(`Could not find ffmpeg version in ${stdout}`))
// Fix ffmpeg version that does not include patch version (4.4 for example)
let version = parsed[1]
if (version.match(/^\d+\.\d+$/)) {
version += '.0'
}
return res(version)
})
.catch(err => rej(err))
})
})
}
async function runCommand (options: {
command: FfmpegCommand
silent?: boolean // false by default
job?: Job
}) {
const { command, silent = false, job } = options
return new Promise<void>((res, rej) => {
let shellCommand: string
command.on('start', cmdline => { shellCommand = cmdline })
command.on('error', (err, stdout, stderr) => {
if (silent !== true) logger.error('Error in ffmpeg.', { stdout, stderr, shellCommand, ...lTags() })
rej(err)
})
command.on('end', (stdout, stderr) => {
logger.debug('FFmpeg command ended.', { stdout, stderr, shellCommand, ...lTags() })
res()
})
if (job) {
command.on('progress', progress => {
if (!progress.percent) return
job.progress(Math.round(progress.percent))
.catch(err => logger.warn('Cannot set ffmpeg job progress.', { err, ...lTags() }))
})
}
command.run()
})
}
function buildStreamSuffix (base: string, streamNum?: number) {
if (streamNum !== undefined) {
return `${base}:${streamNum}`
}
return base
}
function getScaleFilter (options: EncoderOptions): string {
if (options.scaleFilter) return options.scaleFilter.name
return 'scale'
}
export {
getFFmpeg,
getFFmpegVersion,
runCommand,
StreamType,
buildStreamSuffix,
getScaleFilter
}
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