12 files changed, 1339 insertions, 0 deletions

diff --git a/shared/ffmpeg/ffmpeg-command-wrapper.ts b/shared/ffmpeg/ffmpeg-command-wrapper.ts
new file mode 100644
index 000000000..7a8c19d4b
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-command-wrapper.ts
@@ -0,0 +1,234 @@
+import ffmpeg, { FfmpegCommand, getAvailableEncoders } from 'fluent-ffmpeg'
+import { pick, promisify0 } from '@shared/core-utils'
+import { AvailableEncoders, EncoderOptionsBuilder, EncoderOptionsBuilderParams, EncoderProfile } from '@shared/models'
+
+type FFmpegLogger = {
+  info: (msg: string, obj?: any) => void
+  debug: (msg: string, obj?: any) => void
+  warn: (msg: string, obj?: any) => void
+  error: (msg: string, obj?: any) => void
+}
+
+export interface FFmpegCommandWrapperOptions {
+  availableEncoders?: AvailableEncoders
+  profile?: string
+
+  niceness: number
+  tmpDirectory: string
+  threads: number
+
+  logger: FFmpegLogger
+  lTags?: { tags: string[] }
+
+  updateJobProgress?: (progress?: number) => void
+}
+
+export class FFmpegCommandWrapper {
+  private static supportedEncoders: Map<string, boolean>
+
+  private readonly availableEncoders: AvailableEncoders
+  private readonly profile: string
+
+  private readonly niceness: number
+  private readonly tmpDirectory: string
+  private readonly threads: number
+
+  private readonly logger: FFmpegLogger
+  private readonly lTags: { tags: string[] }
+
+  private readonly updateJobProgress: (progress?: number) => void
+
+  private command: FfmpegCommand
+
+  constructor (options: FFmpegCommandWrapperOptions) {
+    this.availableEncoders = options.availableEncoders
+    this.profile = options.profile
+    this.niceness = options.niceness
+    this.tmpDirectory = options.tmpDirectory
+    this.threads = options.threads
+    this.logger = options.logger
+    this.lTags = options.lTags || { tags: [] }
+    this.updateJobProgress = options.updateJobProgress
+  }
+
+  getAvailableEncoders () {
+    return this.availableEncoders
+  }
+
+  getProfile () {
+    return this.profile
+  }
+
+  getCommand () {
+    return this.command
+  }
+
+  // ---------------------------------------------------------------------------
+
+  debugLog (msg: string, meta: any) {
+    this.logger.debug(msg, { ...meta, ...this.lTags })
+  }
+
+  // ---------------------------------------------------------------------------
+
+  buildCommand (input: string) {
+    if (this.command) throw new Error('Command is already built')
+
+    // We set cwd explicitly because ffmpeg appears to create temporary files when trancoding which fails in read-only file systems
+    this.command = ffmpeg(input, {
+      niceness: this.niceness,
+      cwd: this.tmpDirectory
+    })
+
+    if (this.threads > 0) {
+      // If we don't set any threads ffmpeg will chose automatically
+      this.command.outputOption('-threads ' + this.threads)
+    }
+
+    return this.command
+  }
+
+  async runCommand (options: {
+    silent?: boolean // false by default
+  } = {}) {
+    const { silent = false } = options
+
+    return new Promise<void>((res, rej) => {
+      let shellCommand: string
+
+      this.command.on('start', cmdline => { shellCommand = cmdline })
+
+      this.command.on('error', (err, stdout, stderr) => {
+        if (silent !== true) this.logger.error('Error in ffmpeg.', { stdout, stderr, shellCommand, ...this.lTags })
+
+        rej(err)
+      })
+
+      this.command.on('end', (stdout, stderr) => {
+        this.logger.debug('FFmpeg command ended.', { stdout, stderr, shellCommand, ...this.lTags })
+
+        res()
+      })
+
+      if (this.updateJobProgress) {
+        this.command.on('progress', progress => {
+          if (!progress.percent) return
+
+          // Sometimes ffmpeg returns an invalid progress
+          let percent = Math.round(progress.percent)
+          if (percent < 0) percent = 0
+          if (percent > 100) percent = 100
+
+          this.updateJobProgress(percent)
+        })
+      }
+
+      this.command.run()
+    })
+  }
+
+  // ---------------------------------------------------------------------------
+
+  static resetSupportedEncoders () {
+    FFmpegCommandWrapper.supportedEncoders = undefined
+  }
+
+  // Run encoder builder depending on available encoders
+  // Try encoders by priority: if the encoder is available, run the chosen profile or fallback to the default one
+  // If the default one does not exist, check the next encoder
+  async getEncoderBuilderResult (options: EncoderOptionsBuilderParams & {
+    streamType: 'video' | 'audio'
+    input: string
+
+    videoType: 'vod' | 'live'
+  }) {
+    if (!this.availableEncoders) {
+      throw new Error('There is no available encoders')
+    }
+
+    const { streamType, videoType } = options
+
+    const encodersToTry = this.availableEncoders.encodersToTry[videoType][streamType]
+    const encoders = this.availableEncoders.available[videoType]
+
+    for (const encoder of encodersToTry) {
+      if (!(await this.checkFFmpegEncoders(this.availableEncoders)).get(encoder)) {
+        this.logger.debug(`Encoder ${encoder} not available in ffmpeg, skipping.`, this.lTags)
+        continue
+      }
+
+      if (!encoders[encoder]) {
+        this.logger.debug(`Encoder ${encoder} not available in peertube encoders, skipping.`, this.lTags)
+        continue
+      }
+
+      // An object containing available profiles for this encoder
+      const builderProfiles: EncoderProfile<EncoderOptionsBuilder> = encoders[encoder]
+      let builder = builderProfiles[this.profile]
+
+      if (!builder) {
+        this.logger.debug(`Profile ${this.profile} for encoder ${encoder} not available. Fallback to default.`, this.lTags)
+        builder = builderProfiles.default
+
+        if (!builder) {
+          this.logger.debug(`Default profile for encoder ${encoder} not available. Try next available encoder.`, this.lTags)
+          continue
+        }
+      }
+
+      const result = await builder(
+        pick(options, [
+          'input',
+          'canCopyAudio',
+          'canCopyVideo',
+          'resolution',
+          'inputBitrate',
+          'fps',
+          'inputRatio',
+          'streamNum'
+        ])
+      )
+
+      return {
+        result,
+
+        // If we don't have output options, then copy the input stream
+        encoder: result.copy === true
+          ? 'copy'
+          : encoder
+      }
+    }
+
+    return null
+  }
+
+  // Detect supported encoders by ffmpeg
+  private async checkFFmpegEncoders (peertubeAvailableEncoders: AvailableEncoders): Promise<Map<string, boolean>> {
+    if (FFmpegCommandWrapper.supportedEncoders !== undefined) {
+      return FFmpegCommandWrapper.supportedEncoders
+    }
+
+    const getAvailableEncodersPromise = promisify0(getAvailableEncoders)
+    const availableFFmpegEncoders = await getAvailableEncodersPromise()
+
+    const searchEncoders = new Set<string>()
+    for (const type of [ 'live', 'vod' ]) {
+      for (const streamType of [ 'audio', 'video' ]) {
+        for (const encoder of peertubeAvailableEncoders.encodersToTry[type][streamType]) {
+          searchEncoders.add(encoder)
+        }
+      }
+    }
+
+    const supportedEncoders = new Map<string, boolean>()
+
+    for (const searchEncoder of searchEncoders) {
+      supportedEncoders.set(searchEncoder, availableFFmpegEncoders[searchEncoder] !== undefined)
+    }
+
+    this.logger.info('Built supported ffmpeg encoders.', { supportedEncoders, searchEncoders, ...this.lTags })
+
+    FFmpegCommandWrapper.supportedEncoders = supportedEncoders
+    return supportedEncoders
+  }
+}
diff --git a/shared/ffmpeg/ffmpeg-edition.ts b/shared/ffmpeg/ffmpeg-edition.ts
new file mode 100644
index 000000000..724ca1ea9
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-edition.ts
@@ -0,0 +1,239 @@
+import { FilterSpecification } from 'fluent-ffmpeg'
+import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper'
+import { presetVOD } from './shared/presets'
+import { ffprobePromise, getVideoStreamDimensionsInfo, getVideoStreamDuration, getVideoStreamFPS, hasAudioStream } from './ffprobe'
+
+export class FFmpegEdition {
+  private readonly commandWrapper: FFmpegCommandWrapper
+
+  constructor (options: FFmpegCommandWrapperOptions) {
+    this.commandWrapper = new FFmpegCommandWrapper(options)
+  }
+
+  async cutVideo (options: {
+    inputPath: string
+    outputPath: string
+    start?: number
+    end?: number
+  }) {
+    const { inputPath, outputPath } = options
+
+    const mainProbe = await ffprobePromise(inputPath)
+    const fps = await getVideoStreamFPS(inputPath, mainProbe)
+    const { resolution } = await getVideoStreamDimensionsInfo(inputPath, mainProbe)
+
+    const command = this.commandWrapper.buildCommand(inputPath)
+      .output(outputPath)
+
+    await presetVOD({
+      commandWrapper: this.commandWrapper,
+      input: inputPath,
+      resolution,
+      fps,
+      canCopyAudio: false,
+      canCopyVideo: false
+    })
+
+    if (options.start) {
+      command.outputOption('-ss ' + options.start)
+    }
+
+    if (options.end) {
+      command.outputOption('-to ' + options.end)
+    }
+
+    await this.commandWrapper.runCommand()
+  }
+
+  async addWatermark (options: {
+    inputPath: string
+    watermarkPath: string
+    outputPath: string
+
+    videoFilters: {
+      watermarkSizeRatio: number
+      horitonzalMarginRatio: number
+      verticalMarginRatio: number
+    }
+  }) {
+    const { watermarkPath, inputPath, outputPath, videoFilters } = options
+
+    const videoProbe = await ffprobePromise(inputPath)
+    const fps = await getVideoStreamFPS(inputPath, videoProbe)
+    const { resolution } = await getVideoStreamDimensionsInfo(inputPath, videoProbe)
+
+    const command = this.commandWrapper.buildCommand(inputPath)
+      .output(outputPath)
+
+    command.input(watermarkPath)
+
+    await presetVOD({
+      commandWrapper: this.commandWrapper,
+      input: inputPath,
+      resolution,
+      fps,
+      canCopyAudio: true,
+      canCopyVideo: false
+    })
+
+    const complexFilter: FilterSpecification[] = [
+      // Scale watermark
+      {
+        inputs: [ '[1]', '[0]' ],
+        filter: 'scale2ref',
+        options: {
+          w: 'oh*mdar',
+          h: `ih*${videoFilters.watermarkSizeRatio}`
+        },
+        outputs: [ '[watermark]', '[video]' ]
+      },
+
+      {
+        inputs: [ '[video]', '[watermark]' ],
+        filter: 'overlay',
+        options: {
+          x: `main_w - overlay_w - (main_h * ${videoFilters.horitonzalMarginRatio})`,
+          y: `main_h * ${videoFilters.verticalMarginRatio}`
+        }
+      }
+    ]
+
+    command.complexFilter(complexFilter)
+
+    await this.commandWrapper.runCommand()
+  }
+
+  async addIntroOutro (options: {
+    inputPath: string
+    introOutroPath: string
+    outputPath: string
+    type: 'intro' | 'outro'
+  }) {
+    const { introOutroPath, inputPath, outputPath, type } = options
+
+    const mainProbe = await ffprobePromise(inputPath)
+    const fps = await getVideoStreamFPS(inputPath, mainProbe)
+    const { resolution } = await getVideoStreamDimensionsInfo(inputPath, mainProbe)
+    const mainHasAudio = await hasAudioStream(inputPath, mainProbe)
+
+    const introOutroProbe = await ffprobePromise(introOutroPath)
+    const introOutroHasAudio = await hasAudioStream(introOutroPath, introOutroProbe)
+
+    const command = this.commandWrapper.buildCommand(inputPath)
+      .output(outputPath)
+
+    command.input(introOutroPath)
+
+    if (!introOutroHasAudio && mainHasAudio) {
+      const duration = await getVideoStreamDuration(introOutroPath, introOutroProbe)
+
+      command.input('anullsrc')
+      command.withInputFormat('lavfi')
+      command.withInputOption('-t ' + duration)
+    }
+
+    await presetVOD({
+      commandWrapper: this.commandWrapper,
+      input: inputPath,
+      resolution,
+      fps,
+      canCopyAudio: false,
+      canCopyVideo: false
+    })
+
+    // Add black background to correctly scale intro/outro with padding
+    const complexFilter: FilterSpecification[] = [
+      {
+        inputs: [ '1', '0' ],
+        filter: 'scale2ref',
+        options: {
+          w: 'iw',
+          h: `ih`
+        },
+        outputs: [ 'intro-outro', 'main' ]
+      },
+      {
+        inputs: [ 'intro-outro', 'main' ],
+        filter: 'scale2ref',
+        options: {
+          w: 'iw',
+          h: `ih`
+        },
+        outputs: [ 'to-scale', 'main' ]
+      },
+      {
+        inputs: 'to-scale',
+        filter: 'drawbox',
+        options: {
+          t: 'fill'
+        },
+        outputs: [ 'to-scale-bg' ]
+      },
+      {
+        inputs: [ '1', 'to-scale-bg' ],
+        filter: 'scale2ref',
+        options: {
+          w: 'iw',
+          h: 'ih',
+          force_original_aspect_ratio: 'decrease',
+          flags: 'spline'
+        },
+        outputs: [ 'to-scale', 'to-scale-bg' ]
+      },
+      {
+        inputs: [ 'to-scale-bg', 'to-scale' ],
+        filter: 'overlay',
+        options: {
+          x: '(main_w - overlay_w)/2',
+          y: '(main_h - overlay_h)/2'
+        },
+        outputs: 'intro-outro-resized'
+      }
+    ]
+
+    const concatFilter = {
+      inputs: [],
+      filter: 'concat',
+      options: {
+        n: 2,
+        v: 1,
+        unsafe: 1
+      },
+      outputs: [ 'v' ]
+    }
+
+    const introOutroFilterInputs = [ 'intro-outro-resized' ]
+    const mainFilterInputs = [ 'main' ]
+
+    if (mainHasAudio) {
+      mainFilterInputs.push('0:a')
+
+      if (introOutroHasAudio) {
+        introOutroFilterInputs.push('1:a')
+      } else {
+        // Silent input
+        introOutroFilterInputs.push('2:a')
+      }
+    }
+
+    if (type === 'intro') {
+      concatFilter.inputs = [ ...introOutroFilterInputs, ...mainFilterInputs ]
+    } else {
+      concatFilter.inputs = [ ...mainFilterInputs, ...introOutroFilterInputs ]
+    }
+
+    if (mainHasAudio) {
+      concatFilter.options['a'] = 1
+      concatFilter.outputs.push('a')
+
+      command.outputOption('-map [a]')
+    }
+
+    command.outputOption('-map [v]')
+
+    complexFilter.push(concatFilter)
+    command.complexFilter(complexFilter)
+
+    await this.commandWrapper.runCommand()
+  }
+}
diff --git a/shared/ffmpeg/ffmpeg-images.ts b/shared/ffmpeg/ffmpeg-images.ts
new file mode 100644
index 000000000..2db63bd8b
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-images.ts
@@ -0,0 +1,59 @@
+import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper'
+
+export class FFmpegImage {
+  private readonly commandWrapper: FFmpegCommandWrapper
+
+  constructor (options: FFmpegCommandWrapperOptions) {
+    this.commandWrapper = new FFmpegCommandWrapper(options)
+  }
+
+  convertWebPToJPG (options: {
+    path: string
+    destination: string
+  }): Promise<void> {
+    const { path, destination } = options
+
+    this.commandWrapper.buildCommand(path)
+      .output(destination)
+
+    return this.commandWrapper.runCommand({ silent: true })
+  }
+
+  processGIF (options: {
+    path: string
+    destination: string
+    newSize: { width: number, height: number }
+  }): Promise<void> {
+    const { path, destination, newSize } = options
+
+    this.commandWrapper.buildCommand(path)
+      .fps(20)
+      .size(`${newSize.width}x${newSize.height}`)
+      .output(destination)
+
+    return this.commandWrapper.runCommand()
+  }
+
+  async generateThumbnailFromVideo (options: {
+    fromPath: string
+    folder: string
+    imageName: string
+  }) {
+    const { fromPath, folder, imageName } = options
+
+    const pendingImageName = 'pending-' + imageName
+
+    const thumbnailOptions = {
+      filename: pendingImageName,
+      count: 1,
+      folder
+    }
+
+    return new Promise<string>((res, rej) => {
+      this.commandWrapper.buildCommand(fromPath)
+        .on('error', rej)
+        .on('end', () => res(imageName))
+        .thumbnail(thumbnailOptions)
+    })
+  }
+}
diff --git a/shared/ffmpeg/ffmpeg-live.ts b/shared/ffmpeg/ffmpeg-live.ts
new file mode 100644
index 000000000..cca4c6474
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-live.ts
@@ -0,0 +1,184 @@
+import { FilterSpecification } from 'fluent-ffmpeg'
+import { join } from 'path'
+import { pick } from '@shared/core-utils'
+import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper'
+import { buildStreamSuffix, getScaleFilter, StreamType } from './ffmpeg-utils'
+import { addDefaultEncoderGlobalParams, addDefaultEncoderParams, applyEncoderOptions } from './shared'
+
+export class FFmpegLive {
+  private readonly commandWrapper: FFmpegCommandWrapper
+
+  constructor (options: FFmpegCommandWrapperOptions) {
+    this.commandWrapper = new FFmpegCommandWrapper(options)
+  }
+
+  async getLiveTranscodingCommand (options: {
+    inputUrl: string
+
+    outPath: string
+    masterPlaylistName: string
+
+    toTranscode: {
+      resolution: number
+      fps: number
+    }[]
+
+    // Input information
+    bitrate: number
+    ratio: number
+    hasAudio: boolean
+
+    segmentListSize: number
+    segmentDuration: number
+  }) {
+    const {
+      inputUrl,
+      outPath,
+      toTranscode,
+      bitrate,
+      masterPlaylistName,
+      ratio,
+      hasAudio
+    } = options
+    const command = this.commandWrapper.buildCommand(inputUrl)
+
+    const varStreamMap: string[] = []
+
+    const complexFilter: FilterSpecification[] = [
+      {
+        inputs: '[v:0]',
+        filter: 'split',
+        options: toTranscode.length,
+        outputs: toTranscode.map(t => `vtemp${t.resolution}`)
+      }
+    ]
+
+    command.outputOption('-sc_threshold 0')
+
+    addDefaultEncoderGlobalParams(command)
+
+    for (let i = 0; i < toTranscode.length; i++) {
+      const streamMap: string[] = []
+      const { resolution, fps } = toTranscode[i]
+
+      const baseEncoderBuilderParams = {
+        input: inputUrl,
+
+        canCopyAudio: true,
+        canCopyVideo: true,
+
+        inputBitrate: bitrate,
+        inputRatio: ratio,
+
+        resolution,
+        fps,
+
+        streamNum: i,
+        videoType: 'live' as 'live'
+      }
+
+      {
+        const streamType: StreamType = 'video'
+        const builderResult = await this.commandWrapper.getEncoderBuilderResult({ ...baseEncoderBuilderParams, streamType })
+        if (!builderResult) {
+          throw new Error('No available live video encoder found')
+        }
+
+        command.outputOption(`-map [vout${resolution}]`)
+
+        addDefaultEncoderParams({ command, encoder: builderResult.encoder, fps, streamNum: i })
+
+        this.commandWrapper.debugLog(
+          `Apply ffmpeg live video params from ${builderResult.encoder} using ${this.commandWrapper.getProfile()} profile.`,
+          { builderResult, fps, toTranscode }
+        )
+
+        command.outputOption(`${buildStreamSuffix('-c:v', i)} ${builderResult.encoder}`)
+        applyEncoderOptions(command, builderResult.result)
+
+        complexFilter.push({
+          inputs: `vtemp${resolution}`,
+          filter: getScaleFilter(builderResult.result),
+          options: `w=-2:h=${resolution}`,
+          outputs: `vout${resolution}`
+        })
+
+        streamMap.push(`v:${i}`)
+      }
+
+      if (hasAudio) {
+        const streamType: StreamType = 'audio'
+        const builderResult = await this.commandWrapper.getEncoderBuilderResult({ ...baseEncoderBuilderParams, streamType })
+        if (!builderResult) {
+          throw new Error('No available live audio encoder found')
+        }
+
+        command.outputOption('-map a:0')
+
+        addDefaultEncoderParams({ command, encoder: builderResult.encoder, fps, streamNum: i })
+
+        this.commandWrapper.debugLog(
+          `Apply ffmpeg live audio params from ${builderResult.encoder} using ${this.commandWrapper.getProfile()} profile.`,
+          { builderResult, fps, resolution }
+        )
+
+        command.outputOption(`${buildStreamSuffix('-c:a', i)} ${builderResult.encoder}`)
+        applyEncoderOptions(command, builderResult.result)
+
+        streamMap.push(`a:${i}`)
+      }
+
+      varStreamMap.push(streamMap.join(','))
+    }
+
+    command.complexFilter(complexFilter)
+
+    this.addDefaultLiveHLSParams({ ...pick(options, [ 'segmentDuration', 'segmentListSize' ]), outPath, masterPlaylistName })
+
+    command.outputOption('-var_stream_map', varStreamMap.join(' '))
+
+    return command
+  }
+
+  getLiveMuxingCommand (options: {
+    inputUrl: string
+    outPath: string
+    masterPlaylistName: string
+
+    segmentListSize: number
+    segmentDuration: number
+  }) {
+    const { inputUrl, outPath, masterPlaylistName } = options
+
+    const command = this.commandWrapper.buildCommand(inputUrl)
+
+    command.outputOption('-c:v copy')
+    command.outputOption('-c:a copy')
+    command.outputOption('-map 0:a?')
+    command.outputOption('-map 0:v?')
+
+    this.addDefaultLiveHLSParams({ ...pick(options, [ 'segmentDuration', 'segmentListSize' ]), outPath, masterPlaylistName })
+
+    return command
+  }
+
+  private addDefaultLiveHLSParams (options: {
+    outPath: string
+    masterPlaylistName: string
+    segmentListSize: number
+    segmentDuration: number
+  }) {
+    const { outPath, masterPlaylistName, segmentListSize, segmentDuration } = options
+
+    const command = this.commandWrapper.getCommand()
+
+    command.outputOption('-hls_time ' + segmentDuration)
+    command.outputOption('-hls_list_size ' + segmentListSize)
+    command.outputOption('-hls_flags delete_segments+independent_segments+program_date_time')
+    command.outputOption(`-hls_segment_filename ${join(outPath, '%v-%06d.ts')}`)
+    command.outputOption('-master_pl_name ' + masterPlaylistName)
+    command.outputOption(`-f hls`)
+
+    command.output(join(outPath, '%v.m3u8'))
+  }
+}
diff --git a/shared/ffmpeg/ffmpeg-utils.ts b/shared/ffmpeg/ffmpeg-utils.ts
new file mode 100644
index 000000000..7d09c32ca
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-utils.ts
@@ -0,0 +1,17 @@
+import { EncoderOptions } from '@shared/models'
+
+export type StreamType = 'audio' | 'video'
+
+export function buildStreamSuffix (base: string, streamNum?: number) {
+  if (streamNum !== undefined) {
+    return `${base}:${streamNum}`
+  }
+
+  return base
+}
+
+export function getScaleFilter (options: EncoderOptions): string {
+  if (options.scaleFilter) return options.scaleFilter.name
+
+  return 'scale'
+}
diff --git a/shared/ffmpeg/ffmpeg-version.ts b/shared/ffmpeg/ffmpeg-version.ts
new file mode 100644
index 000000000..41d9b2d89
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-version.ts
@@ -0,0 +1,24 @@
+import { exec } from 'child_process'
+import ffmpeg from 'fluent-ffmpeg'
+
+export function getFFmpegVersion () {
+  return new Promise<string>((res, rej) => {
+    (ffmpeg() as any)._getFfmpegPath((err, ffmpegPath) => {
+      if (err) return rej(err)
+      if (!ffmpegPath) return rej(new Error('Could not find ffmpeg path'))
+
+      return exec(`${ffmpegPath} -version`, (err, stdout) => {
+        if (err) return rej(err)
+
+        const parsed = stdout.match(/ffmpeg version .?(\d+\.\d+(\.\d+)?)/)
+        if (!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'
+        }
+      })
+    })
+  })
+}
diff --git a/shared/ffmpeg/ffmpeg-vod.ts b/shared/ffmpeg/ffmpeg-vod.ts
new file mode 100644
index 000000000..e40ca0a1e
--- /dev/null
+++ b/shared/ffmpeg/ffmpeg-vod.ts
@@ -0,0 +1,256 @@
+import { MutexInterface } from 'async-mutex'
+import { FfmpegCommand } from 'fluent-ffmpeg'
+import { readFile, writeFile } from 'fs-extra'
+import { dirname } from 'path'
+import { pick } from '@shared/core-utils'
+import { VideoResolution } from '@shared/models'
+import { FFmpegCommandWrapper, FFmpegCommandWrapperOptions } from './ffmpeg-command-wrapper'
+import { ffprobePromise, getVideoStreamDimensionsInfo } from './ffprobe'
+import { presetCopy, presetOnlyAudio, presetVOD } from './shared/presets'
+
+export type TranscodeVODOptionsType = 'hls' | 'hls-from-ts' | 'quick-transcode' | 'video' | 'merge-audio' | 'only-audio'
+
+export interface BaseTranscodeVODOptions {
+  type: TranscodeVODOptionsType
+
+  inputPath: string
+  outputPath: string
+
+  // Will be released after the ffmpeg started
+  // To prevent a bug where the input file does not exist anymore when running ffmpeg
+  inputFileMutexReleaser: MutexInterface.Releaser
+
+  resolution: number
+  fps: number
+}
+
+export interface HLSTranscodeOptions extends BaseTranscodeVODOptions {
+  type: 'hls'
+
+  copyCodecs: boolean
+
+  hlsPlaylist: {
+    videoFilename: string
+  }
+}
+
+export interface HLSFromTSTranscodeOptions extends BaseTranscodeVODOptions {
+  type: 'hls-from-ts'
+
+  isAAC: boolean
+
+  hlsPlaylist: {
+    videoFilename: string
+  }
+}
+
+export interface QuickTranscodeOptions extends BaseTranscodeVODOptions {
+  type: 'quick-transcode'
+}
+
+export interface VideoTranscodeOptions extends BaseTranscodeVODOptions {
+  type: 'video'
+}
+
+export interface MergeAudioTranscodeOptions extends BaseTranscodeVODOptions {
+  type: 'merge-audio'
+  audioPath: string
+}
+
+export interface OnlyAudioTranscodeOptions extends BaseTranscodeVODOptions {
+  type: 'only-audio'
+}
+
+export type TranscodeVODOptions =
+  HLSTranscodeOptions
+  | HLSFromTSTranscodeOptions
+  | VideoTranscodeOptions
+  | MergeAudioTranscodeOptions
+  | OnlyAudioTranscodeOptions
+  | QuickTranscodeOptions
+
+// ---------------------------------------------------------------------------
+
+export class FFmpegVOD {
+  private readonly commandWrapper: FFmpegCommandWrapper
+
+  private ended = false
+
+  constructor (options: FFmpegCommandWrapperOptions) {
+    this.commandWrapper = new FFmpegCommandWrapper(options)
+  }
+
+  async transcode (options: TranscodeVODOptions) {
+    const builders: {
+      [ type in TranscodeVODOptionsType ]: (options: TranscodeVODOptions) => Promise<void> | void
+    } = {
+      'quick-transcode': this.buildQuickTranscodeCommand.bind(this),
+      'hls': this.buildHLSVODCommand.bind(this),
+      'hls-from-ts': this.buildHLSVODFromTSCommand.bind(this),
+      'merge-audio': this.buildAudioMergeCommand.bind(this),
+      // TODO: remove, we merge this in buildWebVideoCommand
+      'only-audio': this.buildOnlyAudioCommand.bind(this),
+      'video': this.buildWebVideoCommand.bind(this)
+    }
+
+    this.commandWrapper.debugLog('Will run transcode.', { options })
+
+    const command = this.commandWrapper.buildCommand(options.inputPath)
+      .output(options.outputPath)
+
+    await builders[options.type](options)
+
+    command.on('start', () => {
+      setTimeout(() => {
+        options.inputFileMutexReleaser()
+      }, 1000)
+    })
+
+    await this.commandWrapper.runCommand()
+
+    await this.fixHLSPlaylistIfNeeded(options)
+
+    this.ended = true
+  }
+
+  isEnded () {
+    return this.ended
+  }
+
+  private async buildWebVideoCommand (options: TranscodeVODOptions) {
+    const { resolution, fps, inputPath } = options
+
+    if (resolution === VideoResolution.H_NOVIDEO) {
+      presetOnlyAudio(this.commandWrapper)
+      return
+    }
+
+    let scaleFilterValue: string
+
+    if (resolution !== undefined) {
+      const probe = await ffprobePromise(inputPath)
+      const videoStreamInfo = await getVideoStreamDimensionsInfo(inputPath, probe)
+
+      scaleFilterValue = videoStreamInfo?.isPortraitMode === true
+        ? `w=${resolution}:h=-2`
+        : `w=-2:h=${resolution}`
+    }
+
+    await presetVOD({
+      commandWrapper: this.commandWrapper,
+
+      resolution,
+      input: inputPath,
+      canCopyAudio: true,
+      canCopyVideo: true,
+      fps,
+      scaleFilterValue
+    })
+  }
+
+  private buildQuickTranscodeCommand (_options: TranscodeVODOptions) {
+    const command = this.commandWrapper.getCommand()
+
+    presetCopy(this.commandWrapper)
+
+    command.outputOption('-map_metadata -1') // strip all metadata
+      .outputOption('-movflags faststart')
+  }
+
+  // ---------------------------------------------------------------------------
+  // Audio transcoding
+  // ---------------------------------------------------------------------------
+
+  private async buildAudioMergeCommand (options: MergeAudioTranscodeOptions) {
+    const command = this.commandWrapper.getCommand()
+
+    command.loop(undefined)
+
+    await presetVOD({
+      ...pick(options, [ 'resolution' ]),
+
+      commandWrapper: this.commandWrapper,
+      input: options.audioPath,
+      canCopyAudio: true,
+      canCopyVideo: true,
+      fps: options.fps,
+      scaleFilterValue: this.getMergeAudioScaleFilterValue()
+    })
+
+    command.outputOption('-preset:v veryfast')
+
+    command.input(options.audioPath)
+      .outputOption('-tune stillimage')
+      .outputOption('-shortest')
+  }
+
+  private buildOnlyAudioCommand (_options: OnlyAudioTranscodeOptions) {
+    presetOnlyAudio(this.commandWrapper)
+  }
+
+  // Avoid "height not divisible by 2" error
+  private getMergeAudioScaleFilterValue () {
+    return 'trunc(iw/2)*2:trunc(ih/2)*2'
+  }
+
+  // ---------------------------------------------------------------------------
+  // HLS transcoding
+  // ---------------------------------------------------------------------------
+
+  private async buildHLSVODCommand (options: HLSTranscodeOptions) {
+    const command = this.commandWrapper.getCommand()
+
+    const videoPath = this.getHLSVideoPath(options)
+
+    if (options.copyCodecs) presetCopy(this.commandWrapper)
+    else if (options.resolution === VideoResolution.H_NOVIDEO) presetOnlyAudio(this.commandWrapper)
+    else await this.buildWebVideoCommand(options)
+
+    this.addCommonHLSVODCommandOptions(command, videoPath)
+  }
+
+  private buildHLSVODFromTSCommand (options: HLSFromTSTranscodeOptions) {
+    const command = this.commandWrapper.getCommand()
+
+    const videoPath = this.getHLSVideoPath(options)
+
+    command.outputOption('-c copy')
+
+    if (options.isAAC) {
+      // Required for example when copying an AAC stream from an MPEG-TS
+      // Since it's a bitstream filter, we don't need to reencode the audio
+      command.outputOption('-bsf:a aac_adtstoasc')
+    }
+
+    this.addCommonHLSVODCommandOptions(command, videoPath)
+  }
+
+  private addCommonHLSVODCommandOptions (command: FfmpegCommand, outputPath: string) {
+    return command.outputOption('-hls_time 4')
+                  .outputOption('-hls_list_size 0')
+                  .outputOption('-hls_playlist_type vod')
+                  .outputOption('-hls_segment_filename ' + outputPath)
+                  .outputOption('-hls_segment_type fmp4')
+                  .outputOption('-f hls')
+                  .outputOption('-hls_flags single_file')
+  }
+
+  private async fixHLSPlaylistIfNeeded (options: TranscodeVODOptions) {
+    if (options.type !== 'hls' && options.type !== 'hls-from-ts') return
+
+    const fileContent = await readFile(options.outputPath)
+
+    const videoFileName = options.hlsPlaylist.videoFilename
+    const videoFilePath = this.getHLSVideoPath(options)
+
+    // Fix wrong mapping with some ffmpeg versions
+    const newContent = fileContent.toString()
+                                  .replace(`#EXT-X-MAP:URI="${videoFilePath}",`, `#EXT-X-MAP:URI="${videoFileName}",`)
+
+    await writeFile(options.outputPath, newContent)
+  }
+
+  private getHLSVideoPath (options: HLSTranscodeOptions | HLSFromTSTranscodeOptions) {
+    return `${dirname(options.outputPath)}/${options.hlsPlaylist.videoFilename}`
+  }
+}
diff --git a/shared/ffmpeg/ffprobe.ts b/shared/ffmpeg/ffprobe.ts
new file mode 100644
index 000000000..fda08c28e
--- /dev/null
+++ b/shared/ffmpeg/ffprobe.ts
@@ -0,0 +1,184 @@
+import { ffprobe, FfprobeData } from 'fluent-ffmpeg'
+import { forceNumber } from '@shared/core-utils'
+import { VideoResolution } from '@shared/models/videos'
+
+/**
+ *
+ * Helpers to run ffprobe and extract data from the JSON output
+ *
+ */
+
+function ffprobePromise (path: string) {
+  return new Promise<FfprobeData>((res, rej) => {
+    ffprobe(path, (err, data) => {
+      if (err) return rej(err)
+
+      return res(data)
+    })
+  })
+}
+
+// ---------------------------------------------------------------------------
+// Audio
+// ---------------------------------------------------------------------------
+
+const imageCodecs = new Set([
+  'ansi', 'apng', 'bintext', 'bmp', 'brender_pix', 'dpx', 'exr', 'fits', 'gem', 'gif', 'jpeg2000', 'jpgls', 'mjpeg', 'mjpegb', 'msp2',
+  'pam', 'pbm', 'pcx', 'pfm', 'pgm', 'pgmyuv', 'pgx', 'photocd', 'pictor', 'png', 'ppm', 'psd', 'sgi', 'sunrast', 'svg', 'targa', 'tiff',
+  'txd', 'webp', 'xbin', 'xbm', 'xface', 'xpm', 'xwd'
+])
+
+async function isAudioFile (path: string, existingProbe?: FfprobeData) {
+  const videoStream = await getVideoStream(path, existingProbe)
+  if (!videoStream) return true
+
+  if (imageCodecs.has(videoStream.codec_name)) return true
+
+  return false
+}
+
+async function hasAudioStream (path: string, existingProbe?: FfprobeData) {
+  const { audioStream } = await getAudioStream(path, existingProbe)
+
+  return !!audioStream
+}
+
+async function getAudioStream (videoPath: string, existingProbe?: FfprobeData) {
+  // without position, ffprobe considers the last input only
+  // we make it consider the first input only
+  // if you pass a file path to pos, then ffprobe acts on that file directly
+  const data = existingProbe || await ffprobePromise(videoPath)
+
+  if (Array.isArray(data.streams)) {
+    const audioStream = data.streams.find(stream => stream['codec_type'] === 'audio')
+
+    if (audioStream) {
+      return {
+        absolutePath: data.format.filename,
+        audioStream,
+        bitrate: forceNumber(audioStream['bit_rate'])
+      }
+    }
+  }
+
+  return { absolutePath: data.format.filename }
+}
+
+function getMaxAudioBitrate (type: 'aac' | 'mp3' | string, bitrate: number) {
+  const maxKBitrate = 384
+  const kToBits = (kbits: number) => kbits * 1000
+
+  // If we did not manage to get the bitrate, use an average value
+  if (!bitrate) return 256
+
+  if (type === 'aac') {
+    switch (true) {
+      case bitrate > kToBits(maxKBitrate):
+        return maxKBitrate
+
+      default:
+        return -1 // we interpret it as a signal to copy the audio stream as is
+    }
+  }
+
+  /*
+    a 192kbit/sec mp3 doesn't hold as much information as a 192kbit/sec aac.
+    That's why, when using aac, we can go to lower kbit/sec. The equivalences
+    made here are not made to be accurate, especially with good mp3 encoders.
+    */
+  switch (true) {
+    case bitrate <= kToBits(192):
+      return 128
+
+    case bitrate <= kToBits(384):
+      return 256
+
+    default:
+      return maxKBitrate
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Video
+// ---------------------------------------------------------------------------
+
+async function getVideoStreamDimensionsInfo (path: string, existingProbe?: FfprobeData) {
+  const videoStream = await getVideoStream(path, existingProbe)
+  if (!videoStream) {
+    return {
+      width: 0,
+      height: 0,
+      ratio: 0,
+      resolution: VideoResolution.H_NOVIDEO,
+      isPortraitMode: false
+    }
+  }
+
+  return {
+    width: videoStream.width,
+    height: videoStream.height,
+    ratio: Math.max(videoStream.height, videoStream.width) / Math.min(videoStream.height, videoStream.width),
+    resolution: Math.min(videoStream.height, videoStream.width),
+    isPortraitMode: videoStream.height > videoStream.width
+  }
+}
+
+async function getVideoStreamFPS (path: string, existingProbe?: FfprobeData) {
+  const videoStream = await getVideoStream(path, existingProbe)
+  if (!videoStream) return 0
+
+  for (const key of [ 'avg_frame_rate', 'r_frame_rate' ]) {
+    const valuesText: string = videoStream[key]
+    if (!valuesText) continue
+
+    const [ frames, seconds ] = valuesText.split('/')
+    if (!frames || !seconds) continue
+
+    const result = parseInt(frames, 10) / parseInt(seconds, 10)
+    if (result > 0) return Math.round(result)
+  }
+
+  return 0
+}
+
+async function getVideoStreamBitrate (path: string, existingProbe?: FfprobeData): Promise<number> {
+  const metadata = existingProbe || await ffprobePromise(path)
+
+  let bitrate = metadata.format.bit_rate
+  if (bitrate && !isNaN(bitrate)) return bitrate
+
+  const videoStream = await getVideoStream(path, existingProbe)
+  if (!videoStream) return undefined
+
+  bitrate = forceNumber(videoStream?.bit_rate)
+  if (bitrate && !isNaN(bitrate)) return bitrate
+
+  return undefined
+}
+
+async function getVideoStreamDuration (path: string, existingProbe?: FfprobeData) {
+  const metadata = existingProbe || await ffprobePromise(path)
+
+  return Math.round(metadata.format.duration)
+}
+
+async function getVideoStream (path: string, existingProbe?: FfprobeData) {
+  const metadata = existingProbe || await ffprobePromise(path)
+
+  return metadata.streams.find(s => s.codec_type === 'video')
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  getVideoStreamDimensionsInfo,
+  getMaxAudioBitrate,
+  getVideoStream,
+  getVideoStreamDuration,
+  getAudioStream,
+  getVideoStreamFPS,
+  isAudioFile,
+  ffprobePromise,
+  getVideoStreamBitrate,
+  hasAudioStream
+}
diff --git a/shared/ffmpeg/index.ts b/shared/ffmpeg/index.ts
new file mode 100644
index 000000000..07a7d5402
--- /dev/null
+++ b/shared/ffmpeg/index.ts
@@ -0,0 +1,8 @@
+export * from './ffmpeg-command-wrapper'
+export * from './ffmpeg-edition'
+export * from './ffmpeg-images'
+export * from './ffmpeg-live'
+export * from './ffmpeg-utils'
+export * from './ffmpeg-version'
+export * from './ffmpeg-vod'
+export * from './ffprobe'
diff --git a/shared/ffmpeg/shared/encoder-options.ts b/shared/ffmpeg/shared/encoder-options.ts
new file mode 100644
index 000000000..9692a6b02
--- /dev/null
+++ b/shared/ffmpeg/shared/encoder-options.ts
@@ -0,0 +1,39 @@
+import { FfmpegCommand } from 'fluent-ffmpeg'
+import { EncoderOptions } from '@shared/models'
+import { buildStreamSuffix } from '../ffmpeg-utils'
+
+export function addDefaultEncoderGlobalParams (command: FfmpegCommand) {
+  // avoid issues when transcoding some files: https://trac.ffmpeg.org/ticket/6375
+  command.outputOption('-max_muxing_queue_size 1024')
+         // strip all metadata
+         .outputOption('-map_metadata -1')
+         // allows import of source material with incompatible pixel formats (e.g. MJPEG video)
+         .outputOption('-pix_fmt yuv420p')
+}
+
+export function addDefaultEncoderParams (options: {
+  command: FfmpegCommand
+  encoder: 'libx264' | string
+  fps: number
+
+  streamNum?: number
+}) {
+  const { command, encoder, fps, streamNum } = options
+
+  if (encoder === 'libx264') {
+    // 3.1 is the minimal resource allocation for our highest supported resolution
+    command.outputOption(buildStreamSuffix('-level:v', streamNum) + ' 3.1')
+
+    if (fps) {
+      // Keyframe interval of 2 seconds for faster seeking and resolution switching.
+      // https://streaminglearningcenter.com/blogs/whats-the-right-keyframe-interval.html
+      // https://superuser.com/a/908325
+      command.outputOption(buildStreamSuffix('-g:v', streamNum) + ' ' + (fps * 2))
+    }
+  }
+}
+
+export function applyEncoderOptions (command: FfmpegCommand, options: EncoderOptions) {
+  command.inputOptions(options.inputOptions ?? [])
+    .outputOptions(options.outputOptions ?? [])
+}
diff --git a/shared/ffmpeg/shared/index.ts b/shared/ffmpeg/shared/index.ts
new file mode 100644
index 000000000..51de0316f
--- /dev/null
+++ b/shared/ffmpeg/shared/index.ts
@@ -0,0 +1,2 @@
+export * from './encoder-options'
+export * from './presets'
diff --git a/shared/ffmpeg/shared/presets.ts b/shared/ffmpeg/shared/presets.ts
new file mode 100644
index 000000000..dcebdc1cf
--- /dev/null
+++ b/shared/ffmpeg/shared/presets.ts
@@ -0,0 +1,93 @@
+import { pick } from '@shared/core-utils'
+import { FFmpegCommandWrapper } from '../ffmpeg-command-wrapper'
+import { ffprobePromise, getVideoStreamBitrate, getVideoStreamDimensionsInfo, hasAudioStream } from '../ffprobe'
+import { addDefaultEncoderGlobalParams, addDefaultEncoderParams, applyEncoderOptions } from './encoder-options'
+import { getScaleFilter, StreamType } from '../ffmpeg-utils'
+
+export async function presetVOD (options: {
+  commandWrapper: FFmpegCommandWrapper
+
+  input: string
+
+  canCopyAudio: boolean
+  canCopyVideo: boolean
+
+  resolution: number
+  fps: number
+
+  scaleFilterValue?: string
+}) {
+  const { commandWrapper, input, resolution, fps, scaleFilterValue } = options
+  const command = commandWrapper.getCommand()
+
+  command.format('mp4')
+    .outputOption('-movflags faststart')
+
+  addDefaultEncoderGlobalParams(command)
+
+  const probe = await ffprobePromise(input)
+
+  // Audio encoder
+  const bitrate = await getVideoStreamBitrate(input, probe)
+  const videoStreamDimensions = await getVideoStreamDimensionsInfo(input, probe)
+
+  let streamsToProcess: StreamType[] = [ 'audio', 'video' ]
+
+  if (!await hasAudioStream(input, probe)) {
+    command.noAudio()
+    streamsToProcess = [ 'video' ]
+  }
+
+  for (const streamType of streamsToProcess) {
+    const builderResult = await commandWrapper.getEncoderBuilderResult({
+      ...pick(options, [ 'canCopyAudio', 'canCopyVideo' ]),
+
+      input,
+      inputBitrate: bitrate,
+      inputRatio: videoStreamDimensions?.ratio || 0,
+
+      resolution,
+      fps,
+      streamType,
+
+      videoType: 'vod' as 'vod'
+    })
+
+    if (!builderResult) {
+      throw new Error('No available encoder found for stream ' + streamType)
+    }
+
+    commandWrapper.debugLog(
+      `Apply ffmpeg params from ${builderResult.encoder} for ${streamType} ` +
+      `stream of input ${input} using ${commandWrapper.getProfile()} profile.`,
+      { builderResult, resolution, fps }
+    )
+
+    if (streamType === 'video') {
+      command.videoCodec(builderResult.encoder)
+
+      if (scaleFilterValue) {
+        command.outputOption(`-vf ${getScaleFilter(builderResult.result)}=${scaleFilterValue}`)
+      }
+    } else if (streamType === 'audio') {
+      command.audioCodec(builderResult.encoder)
+    }
+
+    applyEncoderOptions(command, builderResult.result)
+    addDefaultEncoderParams({ command, encoder: builderResult.encoder, fps })
+  }
+}
+
+export function presetCopy (commandWrapper: FFmpegCommandWrapper) {
+  commandWrapper.getCommand()
+    .format('mp4')
+    .videoCodec('copy')
+    .audioCodec('copy')
+}
+
+export function presetOnlyAudio (commandWrapper: FFmpegCommandWrapper) {
+  commandWrapper.getCommand()
+    .format('mp4')
+    .audioCodec('copy')
+    .noVideo()
+}