1 files changed, 273 insertions, 0 deletions

diff --git a/server/lib/transcoding/web-transcoding.ts b/server/lib/transcoding/web-transcoding.ts
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index 000000000..d43d03b2a
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+++ b/server/lib/transcoding/web-transcoding.ts
@@ -0,0 +1,273 @@
+import { Job } from 'bullmq'
+import { copyFile, move, remove, stat } from 'fs-extra'
+import { basename, join } from 'path'
+import { computeOutputFPS } from '@server/helpers/ffmpeg'
+import { createTorrentAndSetInfoHash } from '@server/helpers/webtorrent'
+import { MVideoFile, MVideoFullLight } from '@server/types/models'
+import { toEven } from '@shared/core-utils'
+import { ffprobePromise, getVideoStreamDuration, getVideoStreamFPS, TranscodeVODOptionsType } from '@shared/ffmpeg'
+import { VideoResolution, VideoStorage } from '@shared/models'
+import { CONFIG } from '../../initializers/config'
+import { VideoFileModel } from '../../models/video/video-file'
+import { generateWebTorrentVideoFilename } from '../paths'
+import { buildFileMetadata } from '../video-file'
+import { VideoPathManager } from '../video-path-manager'
+import { buildFFmpegVOD } from './shared'
+import { computeResolutionsToTranscode } from './transcoding-resolutions'
+
+// Optimize the original video file and replace it. The resolution is not changed.
+export async function optimizeOriginalVideofile (options: {
+  video: MVideoFullLight
+  inputVideoFile: MVideoFile
+  quickTranscode: boolean
+  job: Job
+}) {
+  const { video, inputVideoFile, quickTranscode, job } = options
+
+  const transcodeDirectory = CONFIG.STORAGE.TMP_DIR
+  const newExtname = '.mp4'
+
+  // Will be released by our transcodeVOD function once ffmpeg is ran
+  const inputFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    await video.reload()
+
+    const fileWithVideoOrPlaylist = inputVideoFile.withVideoOrPlaylist(video)
+
+    const result = await VideoPathManager.Instance.makeAvailableVideoFile(fileWithVideoOrPlaylist, async videoInputPath => {
+      const videoOutputPath = join(transcodeDirectory, video.id + '-transcoded' + newExtname)
+
+      const transcodeType: TranscodeVODOptionsType = quickTranscode
+        ? 'quick-transcode'
+        : 'video'
+
+      const resolution = buildOriginalFileResolution(inputVideoFile.resolution)
+      const fps = computeOutputFPS({ inputFPS: inputVideoFile.fps, resolution })
+
+      // Could be very long!
+      await buildFFmpegVOD(job).transcode({
+        type: transcodeType,
+
+        inputPath: videoInputPath,
+        outputPath: videoOutputPath,
+
+        inputFileMutexReleaser,
+
+        resolution,
+        fps
+      })
+
+      // Important to do this before getVideoFilename() to take in account the new filename
+      inputVideoFile.resolution = resolution
+      inputVideoFile.extname = newExtname
+      inputVideoFile.filename = generateWebTorrentVideoFilename(resolution, newExtname)
+      inputVideoFile.storage = VideoStorage.FILE_SYSTEM
+
+      const { videoFile } = await onWebTorrentVideoFileTranscoding({
+        video,
+        videoFile: inputVideoFile,
+        videoOutputPath
+      })
+
+      await remove(videoInputPath)
+
+      return { transcodeType, videoFile }
+    })
+
+    return result
+  } finally {
+    inputFileMutexReleaser()
+  }
+}
+
+// Transcode the original video file to a lower resolution compatible with WebTorrent
+export async function transcodeNewWebTorrentResolution (options: {
+  video: MVideoFullLight
+  resolution: VideoResolution
+  fps: number
+  job: Job
+}) {
+  const { video, resolution, fps, job } = options
+
+  const transcodeDirectory = CONFIG.STORAGE.TMP_DIR
+  const newExtname = '.mp4'
+
+  const inputFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    await video.reload()
+
+    const file = video.getMaxQualityFile().withVideoOrPlaylist(video)
+
+    const result = await VideoPathManager.Instance.makeAvailableVideoFile(file, async videoInputPath => {
+      const newVideoFile = new VideoFileModel({
+        resolution,
+        extname: newExtname,
+        filename: generateWebTorrentVideoFilename(resolution, newExtname),
+        size: 0,
+        videoId: video.id
+      })
+
+      const videoOutputPath = join(transcodeDirectory, newVideoFile.filename)
+
+      const transcodeOptions = {
+        type: 'video' as 'video',
+
+        inputPath: videoInputPath,
+        outputPath: videoOutputPath,
+
+        inputFileMutexReleaser,
+
+        resolution,
+        fps
+      }
+
+      await buildFFmpegVOD(job).transcode(transcodeOptions)
+
+      return onWebTorrentVideoFileTranscoding({ video, videoFile: newVideoFile, videoOutputPath })
+    })
+
+    return result
+  } finally {
+    inputFileMutexReleaser()
+  }
+}
+
+// Merge an image with an audio file to create a video
+export async function mergeAudioVideofile (options: {
+  video: MVideoFullLight
+  resolution: VideoResolution
+  fps: number
+  job: Job
+}) {
+  const { video, resolution, fps, job } = options
+
+  const transcodeDirectory = CONFIG.STORAGE.TMP_DIR
+  const newExtname = '.mp4'
+
+  const inputFileMutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    await video.reload()
+
+    const inputVideoFile = video.getMinQualityFile()
+
+    const fileWithVideoOrPlaylist = inputVideoFile.withVideoOrPlaylist(video)
+
+    const result = await VideoPathManager.Instance.makeAvailableVideoFile(fileWithVideoOrPlaylist, async audioInputPath => {
+      const videoOutputPath = join(transcodeDirectory, video.id + '-transcoded' + newExtname)
+
+      // If the user updates the video preview during transcoding
+      const previewPath = video.getPreview().getPath()
+      const tmpPreviewPath = join(CONFIG.STORAGE.TMP_DIR, basename(previewPath))
+      await copyFile(previewPath, tmpPreviewPath)
+
+      const transcodeOptions = {
+        type: 'merge-audio' as 'merge-audio',
+
+        inputPath: tmpPreviewPath,
+        outputPath: videoOutputPath,
+
+        inputFileMutexReleaser,
+
+        audioPath: audioInputPath,
+        resolution,
+        fps
+      }
+
+      try {
+        await buildFFmpegVOD(job).transcode(transcodeOptions)
+
+        await remove(audioInputPath)
+        await remove(tmpPreviewPath)
+      } catch (err) {
+        await remove(tmpPreviewPath)
+        throw err
+      }
+
+      // Important to do this before getVideoFilename() to take in account the new file extension
+      inputVideoFile.extname = newExtname
+      inputVideoFile.resolution = resolution
+      inputVideoFile.filename = generateWebTorrentVideoFilename(inputVideoFile.resolution, newExtname)
+
+      // ffmpeg generated a new video file, so update the video duration
+      // See https://trac.ffmpeg.org/ticket/5456
+      video.duration = await getVideoStreamDuration(videoOutputPath)
+      await video.save()
+
+      return onWebTorrentVideoFileTranscoding({
+        video,
+        videoFile: inputVideoFile,
+        videoOutputPath
+      })
+    })
+
+    return result
+  } finally {
+    inputFileMutexReleaser()
+  }
+}
+
+export async function onWebTorrentVideoFileTranscoding (options: {
+  video: MVideoFullLight
+  videoFile: MVideoFile
+  videoOutputPath: string
+}) {
+  const { video, videoFile, videoOutputPath } = options
+
+  const mutexReleaser = await VideoPathManager.Instance.lockFiles(video.uuid)
+
+  try {
+    await video.reload()
+
+    const outputPath = VideoPathManager.Instance.getFSVideoFileOutputPath(video, videoFile)
+
+    const stats = await stat(videoOutputPath)
+
+    const probe = await ffprobePromise(videoOutputPath)
+    const fps = await getVideoStreamFPS(videoOutputPath, probe)
+    const metadata = await buildFileMetadata(videoOutputPath, probe)
+
+    await move(videoOutputPath, outputPath, { overwrite: true })
+
+    videoFile.size = stats.size
+    videoFile.fps = fps
+    videoFile.metadata = metadata
+
+    await createTorrentAndSetInfoHash(video, videoFile)
+
+    const oldFile = await VideoFileModel.loadWebTorrentFile({ videoId: video.id, fps: videoFile.fps, resolution: videoFile.resolution })
+    if (oldFile) await video.removeWebTorrentFile(oldFile)
+
+    await VideoFileModel.customUpsert(videoFile, 'video', undefined)
+    video.VideoFiles = await video.$get('VideoFiles')
+
+    return { video, videoFile }
+  } finally {
+    mutexReleaser()
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+function buildOriginalFileResolution (inputResolution: number) {
+  if (CONFIG.TRANSCODING.ALWAYS_TRANSCODE_ORIGINAL_RESOLUTION === true) {
+    return toEven(inputResolution)
+  }
+
+  const resolutions = computeResolutionsToTranscode({
+    input: inputResolution,
+    type: 'vod',
+    includeInput: false,
+    strictLower: false,
+    // We don't really care about the audio resolution in this context
+    hasAudio: true
+  })
+
+  if (resolutions.length === 0) {
+    return toEven(inputResolution)
+  }
+
+  return Math.max(...resolutions)
+}