4 files changed, 219 insertions, 0 deletions

diff --git a/server/lib/live/shared/transcoding-wrapper/abstract-transcoding-wrapper.ts b/server/lib/live/shared/transcoding-wrapper/abstract-transcoding-wrapper.ts
new file mode 100644
index 000000000..226ba4573
--- /dev/null
+++ b/server/lib/live/shared/transcoding-wrapper/abstract-transcoding-wrapper.ts
@@ -0,0 +1,101 @@
+import EventEmitter from 'events'
+import { LoggerTagsFn } from '@server/helpers/logger'
+import { MStreamingPlaylistVideo, MVideoLiveVideo } from '@server/types/models'
+import { LiveVideoError } from '@shared/models'
+
+interface TranscodingWrapperEvents {
+  'end': () => void
+
+  'error': (options: { err: Error }) => void
+}
+
+declare interface AbstractTranscodingWrapper {
+  on<U extends keyof TranscodingWrapperEvents>(
+    event: U, listener: TranscodingWrapperEvents[U]
+  ): this
+
+  emit<U extends keyof TranscodingWrapperEvents>(
+    event: U, ...args: Parameters<TranscodingWrapperEvents[U]>
+  ): boolean
+}
+
+interface AbstractTranscodingWrapperOptions {
+  streamingPlaylist: MStreamingPlaylistVideo
+  videoLive: MVideoLiveVideo
+
+  lTags: LoggerTagsFn
+
+  inputUrl: string
+  fps: number
+  toTranscode: {
+    resolution: number
+    fps: number
+  }[]
+
+  bitrate: number
+  ratio: number
+  hasAudio: boolean
+
+  segmentListSize: number
+  segmentDuration: number
+
+  outDirectory: string
+}
+
+abstract class AbstractTranscodingWrapper extends EventEmitter {
+  protected readonly videoLive: MVideoLiveVideo
+
+  protected readonly toTranscode: {
+    resolution: number
+    fps: number
+  }[]
+
+  protected readonly inputUrl: string
+  protected readonly fps: number
+  protected readonly bitrate: number
+  protected readonly ratio: number
+  protected readonly hasAudio: boolean
+
+  protected readonly segmentListSize: number
+  protected readonly segmentDuration: number
+
+  protected readonly videoUUID: string
+
+  protected readonly outDirectory: string
+
+  protected readonly lTags: LoggerTagsFn
+
+  protected readonly streamingPlaylist: MStreamingPlaylistVideo
+
+  constructor (options: AbstractTranscodingWrapperOptions) {
+    super()
+
+    this.lTags = options.lTags
+
+    this.videoLive = options.videoLive
+    this.videoUUID = options.videoLive.Video.uuid
+    this.streamingPlaylist = options.streamingPlaylist
+
+    this.inputUrl = options.inputUrl
+    this.fps = options.fps
+    this.toTranscode = options.toTranscode
+
+    this.bitrate = options.bitrate
+    this.ratio = options.ratio
+    this.hasAudio = options.hasAudio
+
+    this.segmentListSize = options.segmentListSize
+    this.segmentDuration = options.segmentDuration
+
+    this.outDirectory = options.outDirectory
+  }
+
+  abstract run (): Promise<void>
+
+  abstract abort (error?: LiveVideoError): void
+}
+
+export {
+  AbstractTranscodingWrapper,
+  AbstractTranscodingWrapperOptions
+}
diff --git a/server/lib/live/shared/transcoding-wrapper/ffmpeg-transcoding-wrapper.ts b/server/lib/live/shared/transcoding-wrapper/ffmpeg-transcoding-wrapper.ts
new file mode 100644
index 000000000..1f4c12bd4
--- /dev/null
+++ b/server/lib/live/shared/transcoding-wrapper/ffmpeg-transcoding-wrapper.ts
@@ -0,0 +1,95 @@
+import { FfmpegCommand } from 'fluent-ffmpeg'
+import { getFFmpegCommandWrapperOptions } from '@server/helpers/ffmpeg'
+import { logger } from '@server/helpers/logger'
+import { CONFIG } from '@server/initializers/config'
+import { VIDEO_LIVE } from '@server/initializers/constants'
+import { VideoTranscodingProfilesManager } from '@server/lib/transcoding/default-transcoding-profiles'
+import { FFmpegLive } from '@shared/ffmpeg'
+import { getLiveSegmentTime } from '../../live-utils'
+import { AbstractTranscodingWrapper } from './abstract-transcoding-wrapper'
+
+export class FFmpegTranscodingWrapper extends AbstractTranscodingWrapper {
+  private ffmpegCommand: FfmpegCommand
+  private ended = false
+
+  async run () {
+    this.ffmpegCommand = CONFIG.LIVE.TRANSCODING.ENABLED
+      ? await this.buildFFmpegLive().getLiveTranscodingCommand({
+        inputUrl: this.inputUrl,
+
+        outPath: this.outDirectory,
+        masterPlaylistName: this.streamingPlaylist.playlistFilename,
+
+        segmentListSize: this.segmentListSize,
+        segmentDuration: this.segmentDuration,
+
+        toTranscode: this.toTranscode,
+
+        bitrate: this.bitrate,
+        ratio: this.ratio,
+
+        hasAudio: this.hasAudio
+      })
+      : this.buildFFmpegLive().getLiveMuxingCommand({
+        inputUrl: this.inputUrl,
+        outPath: this.outDirectory,
+
+        masterPlaylistName: this.streamingPlaylist.playlistFilename,
+
+        segmentListSize: VIDEO_LIVE.SEGMENTS_LIST_SIZE,
+        segmentDuration: getLiveSegmentTime(this.videoLive.latencyMode)
+      })
+
+    logger.info('Running local live muxing/transcoding for %s.', this.videoUUID, this.lTags())
+
+    this.ffmpegCommand.run()
+
+    let ffmpegShellCommand: string
+    this.ffmpegCommand.on('start', cmdline => {
+      ffmpegShellCommand = cmdline
+
+      logger.debug('Running ffmpeg command for live', { ffmpegShellCommand, ...this.lTags() })
+    })
+
+    this.ffmpegCommand.on('error', (err, stdout, stderr) => {
+      this.onFFmpegError({ err, stdout, stderr, ffmpegShellCommand })
+    })
+
+    this.ffmpegCommand.on('end', () => {
+      this.onFFmpegEnded()
+    })
+
+    this.ffmpegCommand.run()
+  }
+
+  abort () {
+    // Nothing to do, ffmpeg will automatically exit
+  }
+
+  private onFFmpegError (options: {
+    err: any
+    stdout: string
+    stderr: string
+    ffmpegShellCommand: string
+  }) {
+    const { err, stdout, stderr, ffmpegShellCommand } = options
+
+    // Don't care that we killed the ffmpeg process
+    if (err?.message?.includes('Exiting normally')) return
+
+    logger.error('FFmpeg transcoding error.', { err, stdout, stderr, ffmpegShellCommand, ...this.lTags() })
+
+    this.emit('error', { err })
+  }
+
+  private onFFmpegEnded () {
+    if (this.ended) return
+
+    this.ended = true
+    this.emit('end')
+  }
+
+  private buildFFmpegLive () {
+    return new FFmpegLive(getFFmpegCommandWrapperOptions('live', VideoTranscodingProfilesManager.Instance.getAvailableEncoders()))
+  }
+}
diff --git a/server/lib/live/shared/transcoding-wrapper/index.ts b/server/lib/live/shared/transcoding-wrapper/index.ts
new file mode 100644
index 000000000..ae28fa1ca
--- /dev/null
+++ b/server/lib/live/shared/transcoding-wrapper/index.ts
@@ -0,0 +1,3 @@
+export * from './abstract-transcoding-wrapper'
+export * from './ffmpeg-transcoding-wrapper'
+export * from './remote-transcoding-wrapper'
diff --git a/server/lib/live/shared/transcoding-wrapper/remote-transcoding-wrapper.ts b/server/lib/live/shared/transcoding-wrapper/remote-transcoding-wrapper.ts
new file mode 100644
index 000000000..345eaf442
--- /dev/null
+++ b/server/lib/live/shared/transcoding-wrapper/remote-transcoding-wrapper.ts
@@ -0,0 +1,20 @@
+import { LiveRTMPHLSTranscodingJobHandler } from '@server/lib/runners'
+import { AbstractTranscodingWrapper } from './abstract-transcoding-wrapper'
+
+export class RemoteTranscodingWrapper extends AbstractTranscodingWrapper {
+  async run () {
+    await new LiveRTMPHLSTranscodingJobHandler().create({
+      rtmpUrl: this.inputUrl,
+      toTranscode: this.toTranscode,
+      video: this.videoLive.Video,
+      outputDirectory: this.outDirectory,
+      playlist: this.streamingPlaylist,
+      segmentListSize: this.segmentListSize,
+      segmentDuration: this.segmentDuration
+    })
+  }
+
+  abort () {
+    this.emit('end')
+  }
+}