PeerTube/server/lib/transcoding/web-transcoding.ts

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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'
import { VideoModel } from '@server/models/video/video'
// 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()
await inputVideoFile.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: videoArg, resolution, fps, job } = options
const transcodeDirectory = CONFIG.STORAGE.TMP_DIR
const newExtname = '.mp4'
const inputFileMutexReleaser = await VideoPathManager.Instance.lockFiles(videoArg.uuid)
try {
const video = await VideoModel.loadFull(videoArg.uuid)
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: videoArg, resolution, fps, job } = options
const transcodeDirectory = CONFIG.STORAGE.TMP_DIR
const newExtname = '.mp4'
const inputFileMutexReleaser = await VideoPathManager.Instance.lockFiles(videoArg.uuid)
try {
const video = await VideoModel.loadFull(videoArg.uuid)
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)
}