1 files changed, 181 insertions, 0 deletions

diff --git a/server/lib/transcoding/hls-transcoding.ts b/server/lib/transcoding/hls-transcoding.ts
new file mode 100644
index 000000000..cffa859c7
--- /dev/null
+++ b/server/lib/transcoding/hls-transcoding.ts
@@ -0,0 +1,181 @@
+import { MutexInterface } from 'async-mutex'
+import { Job } from 'bullmq'
+import { ensureDir, move, stat } from 'fs-extra'
+import { basename, extname as extnameUtil, join } from 'path'
+import { retryTransactionWrapper } from '@server/helpers/database-utils'
+import { createTorrentAndSetInfoHash } from '@server/helpers/webtorrent'
+import { sequelizeTypescript } from '@server/initializers/database'
+import { MVideo, MVideoFile } from '@server/types/models'
+import { pick } from '@shared/core-utils'
+import { getVideoStreamDuration, getVideoStreamFPS } from '@shared/ffmpeg'
+import { VideoResolution } from '@shared/models'
+import { CONFIG } from '../../initializers/config'
+import { VideoFileModel } from '../../models/video/video-file'
+import { VideoStreamingPlaylistModel } from '../../models/video/video-streaming-playlist'
+import { updatePlaylistAfterFileChange } from '../hls'
+import { generateHLSVideoFilename, getHlsResolutionPlaylistFilename } from '../paths'
+import { buildFileMetadata } from '../video-file'
+import { VideoPathManager } from '../video-path-manager'
+import { buildFFmpegVOD } from './shared'
+
+// Concat TS segments from a live video to a fragmented mp4 HLS playlist
+export async function generateHlsPlaylistResolutionFromTS (options: {
+  video: MVideo
+  concatenatedTsFilePath: string
+  resolution: VideoResolution
+  fps: number
+  isAAC: boolean
+  inputFileMutexReleaser: MutexInterface.Releaser
+}) {
+  return generateHlsPlaylistCommon({
+    type: 'hls-from-ts' as 'hls-from-ts',
+    inputPath: options.concatenatedTsFilePath,
+
+    ...pick(options, [ 'video', 'resolution', 'fps', 'inputFileMutexReleaser', 'isAAC' ])
+  })
+}
+
+// Generate an HLS playlist from an input file, and update the master playlist
+export function generateHlsPlaylistResolution (options: {
+  video: MVideo
+  videoInputPath: string
+  resolution: VideoResolution
+  fps: number
+  copyCodecs: boolean
+  inputFileMutexReleaser: MutexInterface.Releaser
+  job?: Job
+}) {
+  return generateHlsPlaylistCommon({
+    type: 'hls' as 'hls',
+    inputPath: options.videoInputPath,
+
+    ...pick(options, [ 'video', 'resolution', 'fps', 'copyCodecs', 'inputFileMutexReleaser', 'job' ])
+  })
+}
+
+export async function onHLSVideoFileTranscoding (options: {
+  video: MVideo
+  videoFile: MVideoFile
+  videoOutputPath: string
+  m3u8OutputPath: string
+}) {
+  const { video, videoFile, videoOutputPath, m3u8OutputPath } = options
+
+  // Create or update the playlist
+  const playlist = await retryTransactionWrapper(() => {
+    return sequelizeTypescript.transaction(async transaction => {
+      return VideoStreamingPlaylistModel.loadOrGenerate(video, transaction)
+    })
+  })
+  videoFile.videoStreamingPlaylistId = playlist.id
+
+  const mutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    // VOD transcoding is a long task, refresh video attributes
+    await video.reload()
+
+    const videoFilePath = VideoPathManager.Instance.getFSVideoFileOutputPath(playlist, videoFile)
+    await ensureDir(VideoPathManager.Instance.getFSHLSOutputPath(video))
+
+    // Move playlist file
+    const resolutionPlaylistPath = VideoPathManager.Instance.getFSHLSOutputPath(video, basename(m3u8OutputPath))
+    await move(m3u8OutputPath, resolutionPlaylistPath, { overwrite: true })
+    // Move video file
+    await move(videoOutputPath, videoFilePath, { overwrite: true })
+
+    // Update video duration if it was not set (in case of a live for example)
+    if (!video.duration) {
+      video.duration = await getVideoStreamDuration(videoFilePath)
+      await video.save()
+    }
+
+    const stats = await stat(videoFilePath)
+
+    videoFile.size = stats.size
+    videoFile.fps = await getVideoStreamFPS(videoFilePath)
+    videoFile.metadata = await buildFileMetadata(videoFilePath)
+
+    await createTorrentAndSetInfoHash(playlist, videoFile)
+
+    const oldFile = await VideoFileModel.loadHLSFile({
+      playlistId: playlist.id,
+      fps: videoFile.fps,
+      resolution: videoFile.resolution
+    })
+
+    if (oldFile) {
+      await video.removeStreamingPlaylistVideoFile(playlist, oldFile)
+      await oldFile.destroy()
+    }
+
+    const savedVideoFile = await VideoFileModel.customUpsert(videoFile, 'streaming-playlist', undefined)
+
+    await updatePlaylistAfterFileChange(video, playlist)
+
+    return { resolutionPlaylistPath, videoFile: savedVideoFile }
+  } finally {
+    mutexReleaser()
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+async function generateHlsPlaylistCommon (options: {
+  type: 'hls' | 'hls-from-ts'
+  video: MVideo
+  inputPath: string
+
+  resolution: VideoResolution
+  fps: number
+
+  inputFileMutexReleaser: MutexInterface.Releaser
+
+  copyCodecs?: boolean
+  isAAC?: boolean
+
+  job?: Job
+}) {
+  const { type, video, inputPath, resolution, fps, copyCodecs, isAAC, job, inputFileMutexReleaser } = options
+  const transcodeDirectory = CONFIG.STORAGE.TMP_DIR
+
+  const videoTranscodedBasePath = join(transcodeDirectory, type)
+  await ensureDir(videoTranscodedBasePath)
+
+  const videoFilename = generateHLSVideoFilename(resolution)
+  const videoOutputPath = join(videoTranscodedBasePath, videoFilename)
+
+  const resolutionPlaylistFilename = getHlsResolutionPlaylistFilename(videoFilename)
+  const m3u8OutputPath = join(videoTranscodedBasePath, resolutionPlaylistFilename)
+
+  const transcodeOptions = {
+    type,
+
+    inputPath,
+    outputPath: m3u8OutputPath,
+
+    resolution,
+    fps,
+    copyCodecs,
+
+    isAAC,
+
+    inputFileMutexReleaser,
+
+    hlsPlaylist: {
+      videoFilename
+    }
+  }
+
+  await buildFFmpegVOD(job).transcode(transcodeOptions)
+
+  const newVideoFile = new VideoFileModel({
+    resolution,
+    extname: extnameUtil(videoFilename),
+    size: 0,
+    filename: videoFilename,
+    fps: -1
+  })
+
+  await onHLSVideoFileTranscoding({ video, videoFile: newVideoFile, videoOutputPath, m3u8OutputPath })
+}