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Export encoders options in a dedicated struct

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Chocobozzz 2020-11-23 16:23:52 +01:00 committed by Chocobozzz
parent daf6e48010
commit 9252a33d11
5 changed files with 342 additions and 169 deletions
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348
server/helpers/ffmpeg-utils.ts
View File

@ -4,11 +4,88 @@ import { dirname, join } from 'path'
import { getTargetBitrate, VideoResolution } from '../../shared/models/videos'
import { checkFFmpegEncoders } from '../initializers/checker-before-init'
import { CONFIG } from '../initializers/config'
import { FFMPEG_NICE, VIDEO_LIVE, VIDEO_TRANSCODING_FPS } from '../initializers/constants'
import { getAudioStream, getClosestFramerateStandard, getMaxAudioBitrate, getVideoFileFPS } from './ffprobe-utils'
import { FFMPEG_NICE, VIDEO_LIVE, VIDEO_TRANSCODING_ENCODERS, VIDEO_TRANSCODING_FPS } from '../initializers/constants'
import { getAudioStream, getClosestFramerateStandard, getVideoFileFPS } from './ffprobe-utils'
import { processImage } from './image-utils'
import { logger } from './logger'
// ---------------------------------------------------------------------------
// Encoder options
// ---------------------------------------------------------------------------
// Options builders
export type EncoderOptionsBuilder = (params: {
input: string
resolution: VideoResolution
fps?: number
}) => Promise<EncoderOptions> | EncoderOptions
// Options types
export interface EncoderOptions {
outputOptions: string[]
}
// All our encoders
export interface EncoderProfile <T> {
[ profile: string ]: T
default: T
}
export type AvailableEncoders = {
[ id in 'live' | 'vod' ]: {
[ encoder in 'libx264' | 'aac' | 'libfdkAAC' ]: EncoderProfile<EncoderOptionsBuilder>
}
}
// ---------------------------------------------------------------------------
// Image manipulation
// ---------------------------------------------------------------------------
function convertWebPToJPG (path: string, destination: string): Promise<void> {
const command = ffmpeg(path)
.output(destination)
return runCommand(command)
}
function processGIF (
path: string,
destination: string,
newSize: { width: number, height: number },
keepOriginal = false
): Promise<void> {
return new Promise<void>(async (res, rej) => {
if (path === destination) {
throw new Error('FFmpeg needs an input path different that the output path.')
}
logger.debug('Processing gif %s to %s.', path, destination)
try {
const command = ffmpeg(path)
.fps(20)
.size(`${newSize.width}x${newSize.height}`)
.output(destination)
command.on('error', (err, stdout, stderr) => {
logger.error('Error in ffmpeg gif resizing process.', { stdout, stderr })
return rej(err)
})
.on('end', async () => {
if (keepOriginal !== true) await remove(path)
res()
})
.run()
} catch (err) {
return rej(err)
}
})
}
async function generateImageFromVideoFile (fromPath: string, folder: string, imageName: string, size: { width: number, height: number }) {
const pendingImageName = 'pending-' + imageName
@ -49,9 +126,15 @@ type TranscodeOptionsType = 'hls' | 'quick-transcode' | 'video' | 'merge-audio'
interface BaseTranscodeOptions {
type: TranscodeOptionsType
inputPath: string
outputPath: string
availableEncoders: AvailableEncoders
profile: string
resolution: VideoResolution
isPortraitMode?: boolean
}
@ -94,7 +177,7 @@ const builders: {
'hls': buildHLSVODCommand,
'merge-audio': buildAudioMergeCommand,
'only-audio': buildOnlyAudioCommand,
'video': buildx264Command
'video': buildx264VODCommand
}
async function transcode (options: TranscodeOptions) {
@ -110,58 +193,11 @@ async function transcode (options: TranscodeOptions) {
await fixHLSPlaylistIfNeeded(options)
}
function convertWebPToJPG (path: string, destination: string): Promise<void> {
return new Promise<void>(async (res, rej) => {
try {
const command = ffmpeg(path).output(destination)
// ---------------------------------------------------------------------------
// Live muxing/transcoding functions
// ---------------------------------------------------------------------------
command.on('error', (err, stdout, stderr) => {
logger.error('Error in ffmpeg webp convert process.', { stdout, stderr })
return rej(err)
})
.on('end', () => res())
.run()
} catch (err) {
return rej(err)
}
})
}
function processGIF (
path: string,
destination: string,
newSize: { width: number, height: number },
keepOriginal = false
): Promise<void> {
return new Promise<void>(async (res, rej) => {
if (path === destination) {
throw new Error('FFmpeg needs an input path different that the output path.')
}
logger.debug('Processing gif %s to %s.', path, destination)
try {
const command = ffmpeg(path)
.fps(20)
.size(`${newSize.width}x${newSize.height}`)
.output(destination)
command.on('error', (err, stdout, stderr) => {
logger.error('Error in ffmpeg gif resizing process.', { stdout, stderr })
return rej(err)
})
.on('end', async () => {
if (keepOriginal !== true) await remove(path)
res()
})
.run()
} catch (err) {
return rej(err)
}
})
}
function runLiveTranscoding (rtmpUrl: string, outPath: string, resolutions: number[], fps, deleteSegments: boolean) {
function getLiveTranscodingCommand (rtmpUrl: string, outPath: string, resolutions: number[], fps: number, deleteSegments: boolean) {
const command = getFFmpeg(rtmpUrl)
command.inputOption('-fflags nobuffer')
@ -183,14 +219,9 @@ function runLiveTranscoding (rtmpUrl: string, outPath: string, resolutions: numb
}))
])
command.outputOption('-b_strategy 1')
command.outputOption('-bf 16')
addEncoderDefaultParams(command, 'libx264', fps)
command.outputOption('-preset superfast')
command.outputOption('-level 3.1')
command.outputOption('-map_metadata -1')
command.outputOption('-pix_fmt yuv420p')
command.outputOption('-max_muxing_queue_size 1024')
command.outputOption('-g ' + (fps * 2))
for (let i = 0; i < resolutions.length; i++) {
const resolution = resolutions[i]
@ -209,12 +240,10 @@ function runLiveTranscoding (rtmpUrl: string, outPath: string, resolutions: numb
command.outputOption('-var_stream_map', varStreamMap.join(' '))
command.run()
return command
}
function runLiveMuxing (rtmpUrl: string, outPath: string, deleteSegments: boolean) {
function getLiveMuxingCommand (rtmpUrl: string, outPath: string, deleteSegments: boolean) {
const command = getFFmpeg(rtmpUrl)
command.inputOption('-fflags nobuffer')
@ -225,8 +254,6 @@ function runLiveMuxing (rtmpUrl: string, outPath: string, deleteSegments: boolea
addDefaultLiveHLSParams(command, outPath, deleteSegments)
command.run()
return command
}
@ -255,32 +282,13 @@ async function hlsPlaylistToFragmentedMP4 (hlsDirectory: string, segmentFiles: s
return runCommand(command, cleaner)
}
async function runCommand (command: ffmpeg.FfmpegCommand, onEnd?: Function) {
return new Promise<string>((res, rej) => {
command.on('error', (err, stdout, stderr) => {
if (onEnd) onEnd()
logger.error('Error in transcoding job.', { stdout, stderr })
rej(err)
})
command.on('end', () => {
if (onEnd) onEnd()
res()
})
command.run()
})
}
// ---------------------------------------------------------------------------
export {
runLiveMuxing,
getLiveTranscodingCommand,
getLiveMuxingCommand,
convertWebPToJPG,
processGIF,
runLiveTranscoding,
generateImageFromVideoFile,
TranscodeOptions,
TranscodeOptionsType,
@ -290,12 +298,23 @@ export {
// ---------------------------------------------------------------------------
function addDefaultX264Params (command: ffmpeg.FfmpegCommand) {
// ---------------------------------------------------------------------------
// Default options
// ---------------------------------------------------------------------------
function addEncoderDefaultParams (command: ffmpeg.FfmpegCommand, encoder: 'libx264' | string, fps?: number) {
if (encoder !== 'libx264') return
command.outputOption('-level 3.1') // 3.1 is the minimal resource allocation for our highest supported resolution
.outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorithm, 16 is optimal B-frames for it
.outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16
.outputOption('-pix_fmt yuv420p') // allows import of source material with incompatible pixel formats (e.g. MJPEG video)
.outputOption('-map_metadata -1') // strip all metadata
.outputOption('-max_muxing_queue_size 1024') // avoid issues when transcoding some files: https://trac.ffmpeg.org/ticket/6375
// 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
.outputOption('-g ' + (fps * 2))
}
function addDefaultLiveHLSParams (command: ffmpeg.FfmpegCommand, outPath: string, deleteSegments: boolean) {
@ -313,7 +332,11 @@ function addDefaultLiveHLSParams (command: ffmpeg.FfmpegCommand, outPath: string
command.output(join(outPath, '%v.m3u8'))
}
async function buildx264Command (command: ffmpeg.FfmpegCommand, options: TranscodeOptions) {
// ---------------------------------------------------------------------------
// Transcode VOD command builders
// ---------------------------------------------------------------------------
async function buildx264VODCommand (command: ffmpeg.FfmpegCommand, options: TranscodeOptions) {
let fps = await getVideoFileFPS(options.inputPath)
if (
// On small/medium resolutions, limit FPS
@ -325,7 +348,7 @@ async function buildx264Command (command: ffmpeg.FfmpegCommand, options: Transco
fps = getClosestFramerateStandard(fps, 'STANDARD')
}
command = await presetH264(command, options.inputPath, options.resolution, fps)
command = await presetVideo(command, options.inputPath, options, fps)
if (options.resolution !== undefined) {
// '?x720' or '720x?' for example
@ -347,7 +370,16 @@ async function buildx264Command (command: ffmpeg.FfmpegCommand, options: Transco
async function buildAudioMergeCommand (command: ffmpeg.FfmpegCommand, options: MergeAudioTranscodeOptions) {
command = command.loop(undefined)
command = await presetH264VeryFast(command, options.audioPath, options.resolution)
command = await presetVideo(command, options.audioPath, options)
/*
MAIN reference: https://slhck.info/video/2017/03/01/rate-control.html
Our target situation is closer to a livestream than a stream,
since we want to reduce as much a possible the encoding burden,
although not to the point of a livestream where there is a hard
constraint on the frames per second to be encoded.
*/
command.outputOption('-preset:v veryfast')
command = command.input(options.audioPath)
.videoFilter('scale=trunc(iw/2)*2:trunc(ih/2)*2') // Avoid "height not divisible by 2" error
@ -377,7 +409,7 @@ async function buildHLSVODCommand (command: ffmpeg.FfmpegCommand, options: HLSTr
if (options.copyCodecs) command = presetCopy(command)
else if (options.resolution === VideoResolution.H_NOVIDEO) command = presetOnlyAudio(command)
else command = await buildx264Command(command, options)
else command = await buildx264VODCommand(command, options)
command = command.outputOption('-hls_time 4')
.outputOption('-hls_list_size 0')
@ -390,10 +422,6 @@ async function buildHLSVODCommand (command: ffmpeg.FfmpegCommand, options: HLSTr
return command
}
function getHLSVideoPath (options: HLSTranscodeOptions) {
return `${dirname(options.outputPath)}/${options.hlsPlaylist.videoFilename}`
}
async function fixHLSPlaylistIfNeeded (options: TranscodeOptions) {
if (options.type !== 'hls') return
@ -409,76 +437,71 @@ async function fixHLSPlaylistIfNeeded (options: TranscodeOptions) {
await writeFile(options.outputPath, newContent)
}
/**
* A slightly customised version of the 'veryfast' x264 preset
*
* The veryfast preset is right in the sweet spot of performance
* and quality. Superfast and ultrafast will give you better
* performance, but then quality is noticeably worse.
*/
async function presetH264VeryFast (command: ffmpeg.FfmpegCommand, input: string, resolution: VideoResolution, fps?: number) {
let localCommand = await presetH264(command, input, resolution, fps)
localCommand = localCommand.outputOption('-preset:v veryfast')
/*
MAIN reference: https://slhck.info/video/2017/03/01/rate-control.html
Our target situation is closer to a livestream than a stream,
since we want to reduce as much a possible the encoding burden,
although not to the point of a livestream where there is a hard
constraint on the frames per second to be encoded.
*/
return localCommand
function getHLSVideoPath (options: HLSTranscodeOptions) {
return `${dirname(options.outputPath)}/${options.hlsPlaylist.videoFilename}`
}
/**
* Standard profile, with variable bitrate audio and faststart.
*
* As for the audio, quality '5' is the highest and ensures 96-112kbps/channel
* See https://trac.ffmpeg.org/wiki/Encode/AAC#fdk_vbr
*/
async function presetH264 (command: ffmpeg.FfmpegCommand, input: string, resolution: VideoResolution, fps?: number) {
// ---------------------------------------------------------------------------
// Transcoding presets
// ---------------------------------------------------------------------------
async function presetVideo (
command: ffmpeg.FfmpegCommand,
input: string,
transcodeOptions: TranscodeOptions,
fps?: number
) {
let localCommand = command
.format('mp4')
.videoCodec('libx264')
.outputOption('-movflags faststart')
addDefaultX264Params(localCommand)
// Audio encoder
const parsedAudio = await getAudioStream(input)
let streamsToProcess = [ 'AUDIO', 'VIDEO' ]
const streamsFound = {
AUDIO: '',
VIDEO: ''
}
if (!parsedAudio.audioStream) {
localCommand = localCommand.noAudio()
} else if ((await checkFFmpegEncoders()).get('libfdk_aac')) { // we favor VBR, if a good AAC encoder is available
localCommand = localCommand
.audioCodec('libfdk_aac')
.audioQuality(5)
} else {
// we try to reduce the ceiling bitrate by making rough matches of bitrates
// of course this is far from perfect, but it might save some space in the end
localCommand = localCommand.audioCodec('aac')
const audioCodecName = parsedAudio.audioStream['codec_name']
const bitrate = getMaxAudioBitrate(audioCodecName, parsedAudio.bitrate)
if (bitrate !== undefined && bitrate !== -1) localCommand = localCommand.audioBitrate(bitrate)
streamsToProcess = [ 'VIDEO' ]
}
if (fps) {
// Constrained Encoding (VBV)
// https://slhck.info/video/2017/03/01/rate-control.html
// https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate
const targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
localCommand = localCommand.outputOptions([ `-maxrate ${targetBitrate}`, `-bufsize ${targetBitrate * 2}` ])
for (const stream of streamsToProcess) {
const encodersToTry: string[] = VIDEO_TRANSCODING_ENCODERS[stream]
// 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
localCommand = localCommand.outputOption(`-g ${fps * 2}`)
for (const encoder of encodersToTry) {
if (!(await checkFFmpegEncoders()).get(encoder)) continue
const builderProfiles: EncoderProfile<EncoderOptionsBuilder> = transcodeOptions.availableEncoders.vod[encoder]
let builder = builderProfiles[transcodeOptions.profile]
if (!builder) {
logger.debug('Profile %s for encoder %s not available. Fallback to default.', transcodeOptions.profile, encoder)
builder = builderProfiles.default
}
const builderResult = await builder({ input, resolution: transcodeOptions.resolution, fps })
logger.debug('Apply ffmpeg params from %s.', encoder, builderResult)
localCommand.outputOptions(builderResult.outputOptions)
addEncoderDefaultParams(localCommand, encoder)
streamsFound[stream] = encoder
break
}
if (!streamsFound[stream]) {
throw new Error('No available encoder found ' + encodersToTry.join(', '))
}
}
localCommand.videoCodec(streamsFound.VIDEO)
return localCommand
}
@ -496,6 +519,10 @@ function presetOnlyAudio (command: ffmpeg.FfmpegCommand): ffmpeg.FfmpegCommand {
.noVideo()
}
// ---------------------------------------------------------------------------
// Utils
// ---------------------------------------------------------------------------
function getFFmpeg (input: string) {
// We set cwd explicitly because ffmpeg appears to create temporary files when trancoding which fails in read-only file systems
const command = ffmpeg(input, { niceness: FFMPEG_NICE.TRANSCODING, cwd: CONFIG.STORAGE.TMP_DIR })
@ -507,3 +534,22 @@ function getFFmpeg (input: string) {
return command
}
async function runCommand (command: ffmpeg.FfmpegCommand, onEnd?: Function) {
return new Promise<void>((res, rej) => {
command.on('error', (err, stdout, stderr) => {
if (onEnd) onEnd()
logger.error('Error in transcoding job.', { stdout, stderr })
rej(err)
})
command.on('end', () => {
if (onEnd) onEnd()
res()
})
command.run()
})
}

29
server/initializers/checker-before-init.ts
View File

@ -82,6 +82,8 @@ function checkMissedConfig () {
async function checkFFmpeg (CONFIG: { TRANSCODING: { ENABLED: boolean } }) {
if (CONFIG.TRANSCODING.ENABLED === false) return undefined
checkFFmpegEncoders()
const Ffmpeg = require('fluent-ffmpeg')
const getAvailableCodecsPromise = promisify0(Ffmpeg.getAvailableCodecs)
const codecs = await getAvailableCodecsPromise()
@ -100,25 +102,30 @@ async function checkFFmpeg (CONFIG: { TRANSCODING: { ENABLED: boolean } }) {
return checkFFmpegEncoders()
}
// Optional encoders, if present, can be used to improve transcoding
// Here we ask ffmpeg if it detects their presence on the system, so that we can later use them
let supportedOptionalEncoders: Map<string, boolean>
// Detect supported encoders by ffmpeg
let supportedEncoders: Map<string, boolean>
async function checkFFmpegEncoders (): Promise<Map<string, boolean>> {
if (supportedOptionalEncoders !== undefined) {
return supportedOptionalEncoders
if (supportedEncoders !== undefined) {
return supportedEncoders
}
const Ffmpeg = require('fluent-ffmpeg')
const getAvailableEncodersPromise = promisify0(Ffmpeg.getAvailableEncoders)
const encoders = await getAvailableEncodersPromise()
const optionalEncoders = [ 'libfdk_aac' ]
supportedOptionalEncoders = new Map<string, boolean>()
const availableEncoders = await getAvailableEncodersPromise()
for (const encoder of optionalEncoders) {
supportedOptionalEncoders.set(encoder, encoders[encoder] !== undefined)
const searchEncoders = [
'aac',
'libfdk_aac',
'libx264'
]
supportedEncoders = new Map<string, boolean>()
for (const searchEncoder of searchEncoders) {
supportedEncoders.set(searchEncoder, availableEncoders[searchEncoder] !== undefined)
}
return supportedOptionalEncoders
return supportedEncoders
}
function checkNodeVersion () {

12
server/initializers/constants.ts
View File

@ -336,6 +336,17 @@ const VIDEO_TRANSCODING_FPS: VideoTranscodingFPS = {
KEEP_ORIGIN_FPS_RESOLUTION_MIN: 720 // We keep the original FPS on high resolutions (720 minimum)
}
const VIDEO_TRANSCODING_ENCODERS = {
VIDEO: [ 'libx264' ],
// Try the first one, if not available try the second one etc
AUDIO: [
// we favor VBR, if a good AAC encoder is available
'libfdk_aac',
'aac'
]
}
const DEFAULT_AUDIO_RESOLUTION = VideoResolution.H_480P
const VIDEO_RATE_TYPES: { [ id: string ]: VideoRateType } = {
@ -804,6 +815,7 @@ export {
ACTOR_FOLLOW_SCORE,
PREVIEWS_SIZE,
REMOTE_SCHEME,
VIDEO_TRANSCODING_ENCODERS,
FOLLOW_STATES,
DEFAULT_USER_THEME_NAME,
SERVER_ACTOR_NAME,

8
server/lib/live-manager.ts
View File

@ -4,7 +4,7 @@ import { FfmpegCommand } from 'fluent-ffmpeg'
import { ensureDir, stat } from 'fs-extra'
import { basename } from 'path'
import { isTestInstance } from '@server/helpers/core-utils'
import { runLiveMuxing, runLiveTranscoding } from '@server/helpers/ffmpeg-utils'
import { getLiveMuxingCommand, getLiveTranscodingCommand } from '@server/helpers/ffmpeg-utils'
import { computeResolutionsToTranscode, getVideoFileFPS, getVideoFileResolution } from '@server/helpers/ffprobe-utils'
import { logger } from '@server/helpers/logger'
import { CONFIG, registerConfigChangedHandler } from '@server/initializers/config'
@ -264,8 +264,8 @@ class LiveManager {
const deleteSegments = videoLive.saveReplay === false
const ffmpegExec = CONFIG.LIVE.TRANSCODING.ENABLED
? runLiveTranscoding(rtmpUrl, outPath, allResolutions, fps, deleteSegments)
: runLiveMuxing(rtmpUrl, outPath, deleteSegments)
? getLiveTranscodingCommand(rtmpUrl, outPath, allResolutions, fps, deleteSegments)
: getLiveMuxingCommand(rtmpUrl, outPath, deleteSegments)
logger.info('Running live muxing/transcoding for %s.', videoUUID)
this.transSessions.set(sessionId, ffmpegExec)
@ -382,6 +382,8 @@ class LiveManager {
})
ffmpegExec.on('end', () => onFFmpegEnded())
ffmpegExec.run()
}
private async onEndTransmuxing (videoId: number, cleanupNow = false) {

114
server/lib/video-transcoding.ts
View File

@ -2,13 +2,26 @@ import { copyFile, ensureDir, move, remove, stat } from 'fs-extra'
import { basename, extname as extnameUtil, join } from 'path'
import { createTorrentAndSetInfoHash } from '@server/helpers/webtorrent'
import { MStreamingPlaylistFilesVideo, MVideoFile, MVideoWithAllFiles, MVideoWithFile } from '@server/types/models'
import { VideoResolution } from '../../shared/models/videos'
import { getTargetBitrate, VideoResolution } from '../../shared/models/videos'
import { VideoStreamingPlaylistType } from '../../shared/models/videos/video-streaming-playlist.type'
import { transcode, TranscodeOptions, TranscodeOptionsType } from '../helpers/ffmpeg-utils'
import { canDoQuickTranscode, getDurationFromVideoFile, getMetadataFromFile, getVideoFileFPS } from '../helpers/ffprobe-utils'
import { AvailableEncoders, EncoderOptionsBuilder, transcode, TranscodeOptions, TranscodeOptionsType } from '../helpers/ffmpeg-utils'
import {
canDoQuickTranscode,
getAudioStream,
getDurationFromVideoFile,
getMaxAudioBitrate,
getMetadataFromFile,
getVideoFileBitrate,
getVideoFileFPS
} from '../helpers/ffprobe-utils'
import { logger } from '../helpers/logger'
import { CONFIG } from '../initializers/config'
import { HLS_STREAMING_PLAYLIST_DIRECTORY, P2P_MEDIA_LOADER_PEER_VERSION, WEBSERVER } from '../initializers/constants'
import {
HLS_STREAMING_PLAYLIST_DIRECTORY,
P2P_MEDIA_LOADER_PEER_VERSION,
VIDEO_TRANSCODING_FPS,
WEBSERVER
} from '../initializers/constants'
import { VideoFileModel } from '../models/video/video-file'
import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
import { updateMasterHLSPlaylist, updateSha256VODSegments } from './hls'
@ -31,8 +44,13 @@ async function optimizeOriginalVideofile (video: MVideoWithFile, inputVideoFileA
const transcodeOptions: TranscodeOptions = {
type: transcodeType,
inputPath: videoInputPath,
outputPath: videoTranscodedPath,
availableEncoders,
profile: 'default',
resolution: inputVideoFile.resolution
}
@ -78,14 +96,23 @@ async function transcodeNewResolution (video: MVideoWithFile, resolution: VideoR
const transcodeOptions = resolution === VideoResolution.H_NOVIDEO
? {
type: 'only-audio' as 'only-audio',
inputPath: videoInputPath,
outputPath: videoTranscodedPath,
availableEncoders,
profile: 'default',
resolution
}
: {
type: 'video' as 'video',
inputPath: videoInputPath,
outputPath: videoTranscodedPath,
availableEncoders,
profile: 'default',
resolution,
isPortraitMode: isPortrait
}
@ -111,8 +138,13 @@ async function mergeAudioVideofile (video: MVideoWithAllFiles, resolution: Video
const transcodeOptions = {
type: 'merge-audio' as 'merge-audio',
inputPath: tmpPreviewPath,
outputPath: videoTranscodedPath,
availableEncoders,
profile: 'default',
audioPath: audioInputPath,
resolution
}
@ -156,8 +188,13 @@ async function generateHlsPlaylist (options: {
const transcodeOptions = {
type: 'hls' as 'hls',
inputPath: videoInputPath,
outputPath,
availableEncoders,
profile: 'default',
resolution,
copyCodecs,
isPortraitMode,
@ -215,6 +252,75 @@ async function generateHlsPlaylist (options: {
return video
}
// ---------------------------------------------------------------------------
// Available encoders profiles
// ---------------------------------------------------------------------------
const defaultX264OptionsBuilder: EncoderOptionsBuilder = async ({ input, resolution, fps }) => {
if (!fps) return { outputOptions: [] }
let targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
// Don't transcode to an higher bitrate than the original file
const fileBitrate = await getVideoFileBitrate(input)
targetBitrate = Math.min(targetBitrate, fileBitrate)
return {
outputOptions: [
// Constrained Encoding (VBV)
// https://slhck.info/video/2017/03/01/rate-control.html
// https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate
`-maxrate ${targetBitrate}`, `-bufsize ${targetBitrate * 2}`
]
}
}
const defaultAACOptionsBuilder: EncoderOptionsBuilder = async ({ input }) => {
const parsedAudio = await getAudioStream(input)
// we try to reduce the ceiling bitrate by making rough matches of bitrates
// of course this is far from perfect, but it might save some space in the end
const audioCodecName = parsedAudio.audioStream['codec_name']
const bitrate = getMaxAudioBitrate(audioCodecName, parsedAudio.bitrate)
if (bitrate !== undefined && bitrate !== -1) {
return { outputOptions: [ '-b:a', bitrate + 'k' ] }
}
return { outputOptions: [] }
}
const defaultLibFDKAACOptionsBuilder: EncoderOptionsBuilder = () => {
return { outputOptions: [ '-aq', '5' ] }
}
const availableEncoders: AvailableEncoders = {
vod: {
libx264: {
default: defaultX264OptionsBuilder
},
aac: {
default: defaultAACOptionsBuilder
},
libfdkAAC: {
default: defaultLibFDKAACOptionsBuilder
}
},
live: {
libx264: {
default: defaultX264OptionsBuilder
},
aac: {
default: defaultAACOptionsBuilder
},
libfdkAAC: {
default: defaultLibFDKAACOptionsBuilder
}
}
}
// ---------------------------------------------------------------------------
export {