// ==UserScript==
// @name Local YouTube Downloader
// @name:zh-TW 本地 YouTube 下載器
// @name:zh-HK 本地 YouTube 下載器
// @name:zh-CN 本地 YouTube 下载器
// @name:ja ローカル YouTube ダウンローダー
// @name:kr 로컬 YouTube 다운로더
// @namespace https://blog.maple3142.net/
// @version 0.9.55
// @description Download YouTube videos without external service.
// @description:zh-TW 不需透過第三方服務即可下載 YouTube 影片。
// @description:zh-HK 不需透過第三方服務即可下載 YouTube 影片。
// @description:zh-CN 不需要透过第三方的服务就能下载 YouTube 视频。
// @description:ja 外部サービスなしで YouTube 動画をダウンロード
// @description:kr 외부 서비스없이 YouTube 동영상을 다운로드
// @description:fr Obtenez un lien brut YouTube sans service externe.
// @description:cs Stahujte YouTube videa bez externích služeb.
// @author maple3142
// @match https://*.youtube.com/*
// @require https://unpkg.com/vue@2.6.10/dist/vue.js
// @require https://unpkg.com/xfetch-js@0.3.4/xfetch.min.js
// @require https://unpkg.com/@ffmpeg/ffmpeg@0.6.1/dist/ffmpeg.min.js
// @require https://bundle.run/p-queue@6.3.0
// @grant GM_xmlhttpRequest
// @grant GM_info
// @grant GM_setValue
// @grant GM_getValue
// @grant unsafeWindow
// @run-at document-end
// @connect googlevideo.com
// @compatible firefox >=52
// @compatible chrome >=55
// @license MIT
// ==/UserScript==
;(function () {
'use strict'
if (
window.top === window.self &&
GM_info.scriptHandler === 'Tampermonkey' &&
GM_info.version === '4.18.0' &&
GM_getValue('tampermonkey_breaks_should_alert', true)
) {
alert(
`Tampermonkey recently release a breaking change / bug in version 4.18.0 that breaks this script, which is fixed in newer version of Tampermonkey right now. You should update it or switch to Violentmonkey instead.`
)
GM_setValue('tampermonkey_breaks_should_alert', false)
}
const DEBUG = true
const createLogger = (console, tag) =>
Object.keys(console)
.map(k => [k, (...args) => (DEBUG ? console[k](tag + ': ' + args[0], ...args.slice(1)) : void 0)])
.reduce((acc, [k, fn]) => ((acc[k] = fn), acc), {})
const logger = createLogger(console, 'YTDL')
const sleep = ms => new Promise(res => setTimeout(res, ms))
const LANG_FALLBACK = 'en'
const LOCALE = {
en: {
togglelinks: 'Show/Hide Links',
stream: 'Stream',
adaptive: 'Adaptive (No Sound)',
videoid: 'Video ID: ',
inbrowser_adaptive_merger: 'Online Adaptive Video & Audio Merger (FFmpeg)',
dlmp4: 'Download high-resolution mp4 in one click',
get_video_failed: 'Failed to get video infomation for unknown reason, refresh the page may work.',
live_stream_disabled_message: 'Local YouTube Downloader is not available for live stream'
},
'zh-tw': {
togglelinks: '顯示 / 隱藏連結',
stream: '串流 Stream',
adaptive: '自適應 Adaptive (沒有聲音)',
videoid: '影片 ID: ',
inbrowser_adaptive_merger: '線上自適應影片及音訊合成工具 (FFmpeg)',
dlmp4: '一鍵下載高畫質 mp4',
get_video_failed: '無法取得影片資訊，重新整理頁面可能會有效果。',
live_stream_disabled_message: '因為是直播的緣故，本地 YouTube 下載器的功能是停用的。'
},
'zh-hk': {
togglelinks: '顯示／隱藏連結',
stream: '串流 Stream',
adaptive: '自動適應 Adaptive (沒有聲音)',
videoid: '影片 ID: ',
inbrowser_adaptive_merger: '網上自動適應影片及音訊合成工具 (FFmpeg)',
dlmp4: '一 click 下載高畫質 mp4',
get_video_failed: '無法取得影片資訊，重新整理頁面可能會有效果。',
live_stream_disabled_message: '本地 YouTube 下載器無法用於直播。'
},
zh: {
togglelinks: '显示／隐藏链接',
stream: '串流 Stream',
adaptive: '自适应 Adaptive (没有声音)',
videoid: '视频 ID: ',
inbrowser_adaptive_merger: '线上自适应视频及音频合成工具 (FFmpeg)',
dlmp4: '一键下载高画质 mp4',
get_video_failed: '无法取得影片资讯，重新整理页面可能会有效果。',
live_stream_disabled_message: '因为是直播，本地 YouTube 下载器的功能已被禁用。'
},
ja: {
togglelinks: 'リンク表示・非表示',
stream: 'ストリーミング',
adaptive: 'アダプティブ（音無し）',
videoid: 'ビデオ ID: ',
inbrowser_adaptive_merger: 'ビデオとオーディオを合併するオンラインツール (FFmpeg)',
dlmp4: 'ワンクリックで高解像度の mp4 をダウンロード',
live_stream_disabled_message: 'ライブ配信のため、ローカル YouTube ダウンローダーは無効になっています。'
},
kr: {
togglelinks: '링크 보이기 · 숨기기',
stream: '스트리밍',
adaptive: '적응 (어댑티브)',
videoid: '비디오 ID: ',
inbrowser_adaptive_merger: '비디오와 오디오를 합병하는 온라인 도구 (FFmpeg)',
dlmp4: '한 번의 클릭으로 고해상도 mp4 다운로드'
},
es: {
togglelinks: 'Mostrar/Ocultar Links',
stream: 'Stream',
adaptive: 'Adaptable',
videoid: 'Id del Video: ',
inbrowser_adaptive_merger: 'Acoplar Audio a Video (FFmpeg)'
},
he: {
togglelinks: 'הצג/הסתר קישורים',
stream: 'סטרים',
adaptive: 'אדפטיבי',
videoid: 'מזהה סרטון: '
},
fr: {
togglelinks: 'Afficher/Masquer les liens',
stream: 'Stream',
adaptive: 'Adaptative',
videoid: 'ID vidéo: ',
inbrowser_adaptive_merger: 'Fusionner vidéos et audios adaptatifs dans le navigateur (FFmpeg)',
dlmp4: 'Téléchargez la plus haute résolution mp4 en un clic'
},
pl: {
togglelinks: 'Pokaż/Ukryj Linki',
stream: 'Stream',
adaptive: 'Adaptywne',
videoid: 'ID filmu: ',
inbrowser_adaptive_merger: 'Połącz audio i wideo adaptywne w przeglądarce (FFmpeg)',
dlmp4: 'Pobierz .mp4 w najwyższej jakości'
},
hi: {
togglelinks: 'लिंक टॉगल करें',
stream: 'स्ट्रीमिंग (Stream)',
adaptive: 'अनुकूली (Adaptive)',
videoid: 'वीडियो आईडी: {{id}}'
},
ru: {
togglelinks: 'Показать/Cкрыть ссылки',
stream: 'Поток',
adaptive: 'Адаптивный',
videoid: 'Идентификатор видео: ',
inbrowser_adaptive_merger: 'Адаптивное слияние видео и аудио онлайн (FFmpeg)',
dlmp4: 'Скачать mp4 в высоком разрешении в один клик',
get_video_failed:
'Не удалось получить информацию о видео по неизвестной причине, попробуйте обновить страницу.',
live_stream_disabled_message: 'Локальный загрузчик YouTube недоступен для прямой трансляции'
},
ua: {
togglelinks: 'Показати/Приховати посилання',
stream: 'Потік',
adaptive: 'Адаптивний',
videoid: 'Ідентифікатор відео: ',
inbrowser_adaptive_merger: 'Адаптивне злиття відео і аудіо онлайн (FFmpeg)',
dlmp4: 'Завантажити mp4 у високій роздільній здатності в один клік',
get_video_failed:
'Не вдалося отримати інформацію про відео з невідомої причини, спробуйте оновити сторінку.',
live_stream_disabled_message: 'Локальний завантажувач YouTube недоступний для прямої трансляції'
},
cs: {
togglelinks: 'Zobrazit/Skrýt odkazy',
stream: 'Stream',
adaptive: 'Adaptivní',
videoid: 'ID videa: ',
inbrowser_adaptive_merger: 'Online nástroj pro sloučení videa a audia (FFmpeg)',
dlmp4: 'Stáhnout video mp4 jedním kliknutím ve vysokém rozlišení',
get_video_failed: 'Nepodařilo se nahrát informace o videu. Zkuste obnovit stránku (F5).',
live_stream_disabled_message: 'Local YouTube Downloader není dostupný pro živé vysílání'
}
}
for (const [lang, data] of Object.entries(LOCALE)) {
if (lang === LANG_FALLBACK) continue
for (const key of Object.keys(LOCALE[LANG_FALLBACK])) {
if (!(key in data)) {
data[key] = LOCALE[LANG_FALLBACK][key]
}
}
}
const findLang = l => {
l = l.replace('-Hant', '') // special case for zh-Hant-TW
// language resolution logic: zh-tw --(if not exists)--> zh --(if not exists)--> LANG_FALLBACK(en)
l = l.toLowerCase().replace('_', '-')
if (l in LOCALE) return l
else if (l.length > 2) return findLang(l.split('-')[0])
else return LANG_FALLBACK
}
const getLangCode = () => {
const html = document.querySelector('html')
if (html) {
return html.lang
} else {
return navigator.language
}
}
const $ = (s, x = document) => x.querySelector(s)
const $el = (tag, opts) => {
const el = document.createElement(tag)
Object.assign(el, opts)
return el
}
const escapeRegExp = s => s.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
const parseDecsig = data => {
try {
if (data.startsWith('var script')) {
// they inject the script via script tag
const obj = {}
const document = {
createElement: () => obj,
head: { appendChild: () => {} }
}
eval(data)
data = obj.innerHTML
}
const fnnameresult = /=([a-zA-Z0-9\$_]+?)\(decodeURIComponent/.exec(data)
const fnname = fnnameresult[1]
const _argnamefnbodyresult = new RegExp(escapeRegExp(fnname) + '=function\\((.+?)\\){((.+)=\\2.+?)}').exec(
data
)
const [_, argname, fnbody] = _argnamefnbodyresult
const helpernameresult = /;([a-zA-Z0-9$_]+?)\..+?\(/.exec(fnbody)
const helpername = helpernameresult[1]
const helperresult = new RegExp('var ' + escapeRegExp(helpername) + '={[\\s\\S]+?};').exec(data)
const helper = helperresult[0]
logger.log(`parsedecsig result: %s=>{%s\n%s}`, argname, helper, fnbody)
return new Function([argname], helper + '\n' + fnbody)
} catch (e) {
logger.error('parsedecsig error: %o', e)
logger.info('script content: %s', data)
logger.info(
'If you encounter this error, please copy the full "script content" to https://pastebin.com/ for me.'
)
}
}
const parseQuery = s => [...new URLSearchParams(s).entries()].reduce((acc, [k, v]) => ((acc[k] = v), acc), {})
const parseResponse = (id, playerResponse, decsig) => {
logger.log(`video %s playerResponse: %o`, id, playerResponse)
let stream = []
if (playerResponse.streamingData.formats) {
stream = playerResponse.streamingData.formats.map(x =>
Object.assign({}, x, parseQuery(x.cipher || x.signatureCipher))
)
logger.log(`video %s stream: %o`, id, stream)
for (const obj of stream) {
if (obj.s) {
obj.s = decsig(obj.s)
obj.url += `&${obj.sp}=${encodeURIComponent(obj.s)}`
}
}
}
let adaptive = []
if (playerResponse.streamingData.adaptiveFormats) {
adaptive = playerResponse.streamingData.adaptiveFormats.map(x =>
Object.assign({}, x, parseQuery(x.cipher || x.signatureCipher))
)
logger.log(`video %s adaptive: %o`, id, adaptive)
for (const obj of adaptive) {
if (obj.s) {
obj.s = decsig(obj.s)
obj.url += `&${obj.sp}=${encodeURIComponent(obj.s)}`
}
}
}
logger.log(`video %s result: %o`, id, { stream, adaptive })
return { stream, adaptive, details: playerResponse.videoDetails, playerResponse }
}
// video downloader
const xhrDownloadUint8Array = async ({ url, contentLength }, progressCb) => {
if (typeof contentLength === 'string') contentLength = parseInt(contentLength)
progressCb({
loaded: 0,
total: contentLength,
speed: 0
})
const chunkSize = 65536
const getBuffer = (start, end) =>
fetch(url + `&range=${start}-${end ? end - 1 : ''}`).then(r => r.arrayBuffer())
const data = new Uint8Array(contentLength)
let downloaded = 0
const queue = new pQueue.default({ concurrency: 6 })
const startTime = Date.now()
const ps = []
for (let start = 0; start < contentLength; start += chunkSize) {
const exceeded = start + chunkSize > contentLength
const curChunkSize = exceeded ? contentLength - start : chunkSize
const end = exceeded ? null : start + chunkSize
const p = queue.add(() => {
console.log('dl start', url, start, end)
return getBuffer(start, end)
.then(buf => {
console.log('dl done', url, start, end)
downloaded += curChunkSize
data.set(new Uint8Array(buf), start)
const ds = (Date.now() - startTime + 1) / 1000
progressCb({
loaded: downloaded,
total: contentLength,
speed: downloaded / ds
})
})
.catch(err => {
queue.clear()
alert('Download error')
})
})
ps.push(p)
}
await Promise.all(ps)
return data
}
const ffWorker = FFmpeg.createWorker({
logger: DEBUG ? m => logger.log(m.message) : () => {}
})
let ffWorkerLoaded = false
const mergeVideo = async (video, audio) => {
if (!ffWorkerLoaded) await ffWorker.load()
await ffWorker.write('video.mp4', video)
await ffWorker.write('audio.mp4', audio)
await ffWorker.run('-i video.mp4 -i audio.mp4 -c copy output.mp4', {
input: ['video.mp4', 'audio.mp4'],
output: 'output.mp4'
})
const { data } = await ffWorker.read('output.mp4')
await ffWorker.remove('output.mp4')
return data
}
const triggerDownload = (url, filename) => {
const a = document.createElement('a')
a.href = url
a.download = filename
document.body.appendChild(a)
a.click()
a.remove()
}
const dlModalTemplate = `
<div style="width: 100%; height: 100%;">
<div v-if="merging" style="height: 100%; width: 100%; display: flex; justify-content: center; align-items: center; font-size: 24px;">Merging video, please wait...</div>
<div v-else style="height: 100%; width: 100%; display: flex; flex-direction: column;">
<div style="flex: 1; margin: 10px;">
<p style="font-size: 24px;">Video</p>
<progress style="width: 100%;" :value="video.progress" min="0" max="100"></progress>
<div style="display: flex; justify-content: space-between;">
<span>{{video.speed}} kB/s</span>
<span>{{video.loaded}}/{{video.total}} MB</span>
</div>
</div>
<div style="flex: 1; margin: 10px;">
<p style="font-size: 24px;">Audio</p>
<progress style="width: 100%;" :value="audio.progress" min="0" max="100"></progress>
<div style="display: flex; justify-content: space-between;">
<span>{{audio.speed}} kB/s</span>
<span>{{audio.loaded}}/{{audio.total}} MB</span>
</div>
</div>
</div>
</div>
`
function openDownloadModel(adaptive, title) {
const win = open(
'',
'Video Download',
`toolbar=no,height=${screen.height / 2},width=${screen.width / 2},left=${screenLeft},top=${screenTop}`
)
const div = win.document.createElement('div')
win.document.body.appendChild(div)
win.document.title = `Downloading "${title}"`
const dlModalApp = new Vue({
template: dlModalTemplate,
data() {
return {
video: {
progress: 0,
total: 0,
loaded: 0,
speed: 0
},
audio: {
progress: 0,
total: 0,
loaded: 0,
speed: 0
},
merging: false
}
},
methods: {
async start(adaptive, title) {
win.onbeforeunload = () => true
// YouTube's default order is descending by video quality
const videoObj = adaptive
.filter(x => x.mimeType.includes('video/mp4') || x.mimeType.includes('video/webm'))
.map(v => {
const [_, quality, fps] = /(\d+)p(\d*)/.exec(v.qualityLabel)
v.qualityNum = parseInt(quality)
v.fps = fps ? parseInt(fps) : 30
return v
})
.sort((a, b) => {
if (a.qualityNum === b.qualityNum) return b.fps - a.fps // ex: 30-60=-30, then a will be put before b
return b.qualityNum - a.qualityNum
})[0]
const audioObj = adaptive.find(x => x.mimeType.includes('audio/mp4'))
const vPromise = xhrDownloadUint8Array(videoObj, e => {
this.video.progress = (e.loaded / e.total) * 100
this.video.loaded = (e.loaded / 1024 / 1024).toFixed(2)
this.video.total = (e.total / 1024 / 1024).toFixed(2)
this.video.speed = (e.speed / 1024).toFixed(2)
})
const aPromise = xhrDownloadUint8Array(audioObj, e => {
this.audio.progress = (e.loaded / e.total) * 100
this.audio.loaded = (e.loaded / 1024 / 1024).toFixed(2)
this.audio.total = (e.total / 1024 / 1024).toFixed(2)
this.audio.speed = (e.speed / 1024).toFixed(2)
})
const [varr, aarr] = await Promise.all([vPromise, aPromise])
this.merging = true
win.onunload = () => {
// trigger download when user close it
const bvurl = URL.createObjectURL(new Blob([varr]))
const baurl = URL.createObjectURL(new Blob([aarr]))
triggerDownload(bvurl, title + '-videoonly.mp4')
triggerDownload(baurl, title + '-audioonly.mp4')
}
const result = await Promise.race([mergeVideo(varr, aarr), sleep(1000 * 25).then(() => null)])
if (!result) {
alert('An error has occurred when merging video')
const bvurl = URL.createObjectURL(new Blob([varr]))
const baurl = URL.createObjectURL(new Blob([aarr]))
triggerDownload(bvurl, title + '-videoonly.mp4')
triggerDownload(baurl, title + '-audioonly.mp4')
return this.close()
}
this.merging = false
const url = URL.createObjectURL(new Blob([result]))
triggerDownload(url, title + '.mp4')
win.onbeforeunload = null
win.onunload = null
win.close()
}
}
}).$mount(div)
dlModalApp.start(adaptive, title)
}
const template = `
<div class="box" :class="{'dark':dark}">
<template v-if="!isLiveStream">
<div v-if="adaptive.length" class="of-h t-center c-pointer lh-20">
<a class="fs-14px" @click="dlmp4" v-text="strings.dlmp4"></a>
</div>
<div @click="hide=!hide" class="box-toggle div-a t-center fs-14px c-pointer lh-20" v-text="strings.togglelinks"></div>
<div :class="{'hide':hide}">
<div class="t-center fs-14px" v-text="strings.videoid+id"></div>
<div class="d-flex">
<div class="f-1 of-h">
<div class="t-center fs-14px" v-text="strings.stream"></div>
<a class="ytdl-link-btn fs-14px" target="_blank" v-for="vid in stream" :href="vid.url" :title="vid.type" v-text="formatStreamText(vid)"></a>
</div>
<div class="f-1 of-h">
<div class="t-center fs-14px" v-text="strings.adaptive"></div>
<a class="ytdl-link-btn fs-14px" target="_blank" v-for="vid in adaptive" :href="vid.url" :title="vid.type" v-text="formatAdaptiveText(vid)"></a>
</div>
</div>
<div class="of-h t-center">
<a class="fs-14px" href="https://maple3142.github.io/mergemp4/" target="_blank" v-text="strings.inbrowser_adaptive_merger"></a>
</div>
</div>
</template>
<template v-else>
<div class="t-center fs-14px lh-20" v-text="strings.live_stream_disabled_message"></div>
</template>
</div>
`.slice(1)
const app = new Vue({
data() {
return {
hide: true,
id: '',
isLiveStream: false,
stream: [],
adaptive: [],
details: null,
dark: false,
lang: findLang(getLangCode())
}
},
computed: {
strings() {
return LOCALE[this.lang.toLowerCase()]
}
},
methods: {
dlmp4() {
openDownloadModel(this.adaptive, this.details.title)
},
formatStreamText(vid) {
return [vid.qualityLabel, vid.quality].filter(x => x).join(': ')
},
formatAdaptiveText(vid) {
let str = [vid.qualityLabel, vid.mimeType].filter(x => x).join(': ')
if (vid.mimeType.includes('audio')) {
str += ` ${Math.round(vid.bitrate / 1000)}kbps`
}
return str
}
},
template
})
logger.log(`default language: %s`, app.lang)
// attach element
const shadowHost = $el('div')
const shadow = shadowHost.attachShadow ? shadowHost.attachShadow({ mode: 'closed' }) : shadowHost // no shadow dom
logger.log('shadowHost: %o', shadowHost)
const container = $el('div')
shadow.appendChild(container)
app.$mount(container)
if (DEBUG && typeof unsafeWindow !== 'undefined') {
// expose some functions for debugging
unsafeWindow.$app = app
unsafeWindow.parseQuery = parseQuery
unsafeWindow.parseDecsig = parseDecsig
unsafeWindow.parseResponse = parseResponse
}
const load = async playerResponse => {
try {
const basejs =
(typeof ytplayer !== 'undefined' && 'config' in ytplayer && ytplayer.config.assets
? 'https://' + location.host + ytplayer.config.assets.js
: 'web_player_context_config' in ytplayer
? 'https://' + location.host + ytplayer.web_player_context_config.jsUrl
: null) || $('script[src$="base.js"]').src
const decsig = await xf.get(basejs).text(parseDecsig)
const id = parseQuery(location.search).v
const data = parseResponse(id, playerResponse, decsig)
logger.log('video loaded: %s', id)
app.isLiveStream = data.playerResponse.playabilityStatus.liveStreamability != null
app.id = id
app.stream = data.stream
app.adaptive = data.adaptive
app.details = data.details
const actLang = getLangCode()
if (actLang != null) {
const lang = findLang(actLang)
logger.log('youtube ui lang: %s', actLang)
logger.log('ytdl lang:', lang)
app.lang = lang
}
} catch (err) {
alert(app.strings.get_video_failed)
logger.error('load', err)
}
}
// hook fetch response
const ff = fetch
unsafeWindow.fetch = (...args) => {
if (args[0] instanceof Request) {
return ff(...args).then(resp => {
if (resp.url.includes('player')) {
resp.clone().json().then(load)
}
return resp
})
}
return ff(...args)
}
// attach element
const it = setInterval(() => {
const el =
$('ytd-watch-metadata') ||
$('#info-contents') ||
$('#watch-header') ||
$('.page-container:not([hidden]) ytm-item-section-renderer>lazy-list')
if (el && !el.contains(shadowHost)) {
el.appendChild(shadowHost)
clearInterval(it)
}
}, 100)
// init
unsafeWindow.addEventListener('load', () => {
const firstResp = unsafeWindow?.ytplayer?.config?.args?.raw_player_response
if (firstResp) {
load(firstResp)
}
})
// listen to dark mode toggle
const $html = $('html')
new MutationObserver(() => {
app.dark = $html.getAttribute('dark') !== null
}).observe($html, { attributes: true })
app.dark = $html.getAttribute('dark') !== null
const css = `
.hide{
display: none;
}
.t-center{
text-align: center;
}
.d-flex{
display: flex;
}
.f-1{
flex: 1;
}
.fs-14px{
font-size: 14px;
}
.of-h{
overflow: hidden;
}
.box{
padding-top: .5em;
padding-bottom: .5em;
border-bottom: 1px solid var(--yt-border-color);
font-family: Arial;
}
.box-toggle{
margin: 3px;
user-select: none;
-moz-user-select: -moz-none;
}
.ytdl-link-btn{
display: block;
border: 1px solid !important;
border-radius: 3px;
text-decoration: none !important;
outline: 0;
text-align: center;
padding: 2px;
margin: 5px;
color: black;
}
a, .div-a{
text-decoration: none;
color: var(--yt-button-color, inherit);
}
a:hover, .div-a:hover{
color: var(--yt-spec-call-to-action, blue);
}
.box.dark{
color: var(--yt-endpoint-color, var(--yt-spec-text-primary));
}
.box.dark .ytdl-link-btn{
color: var(--yt-endpoint-color, var(--yt-spec-text-primary));
}
.box.dark .ytdl-link-btn:hover{
color: rgba(200, 200, 255, 0.8);
}
.box.dark .box-toggle:hover{
color: rgba(200, 200, 255, 0.8);
}
.c-pointer{
cursor: pointer;
}
.lh-20{
line-height: 20px;
}
`
shadow.appendChild($el('style', { textContent: css }))
})()
