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Download Video, Audio, Subtitles
// ==UserScript==
// @name Youtube Downloader Including Video, Audio, Subtitles
// @include https://*youtube.com/*
// @author Jone
// @require https://code.jquery.com/jquery-1.12.4.min.js
// @require https://cdn.jsdelivr.net/npm/streamsaver@2.0.3/StreamSaver.js
// @require https://cdn.jsdelivr.net/npm/web-streams-polyfill@2.0.2/dist/ponyfill.min.js
// @version 1.3
// @license MIT
// @grant GM_xmlhttpRequest
// @description Download Video, Audio, Subtitles
// @namespace https://greasyfork.org/users/889856
// ==/UserScript==
/*
[What is this?]
This Tampermonkey script allows you to download Youtube Video,Audio and subtitle incluing "Automatic subtitle" and "closed subtitle".
[Who built this?]
Author : Jone
[Developed based on the author?]
Author : Cheng Zheng
Email : guokrfans@gmail.com
Github : https://github.com/1c7/Youtube-Auto-Subtitle-Download
If you want to improve the script, Github pull requests are welcome.
[Version of decoding signature function]
verson : 534c466c
package: youtube's base.js
[Test Video]
https://www.youtube.com/watch?v=bkVsus8Ehxs
This videos only has a closed English subtitle, with no auto subtitles.
https://www.youtube.com/watch?v=-WEqFzyrbbs
no subtitle at all
https://www.youtube.com/watch?v=9AzNEG1GB-k
have a lot of subtitles
https://www.youtube.com/watch?v=tqGkOvrKGfY
1:36:33 super long subtitle
[How does it work?]
The code can be roughly divided into three parts:
1. Add a button on the page. (UI)
2. Detect if subtitle exists.
3. Convert subtitle format, then download.
[Test Enviroment]
Works best on Chrome + Tampermonkey.
There are plenty Chromium-based Browser, I do not guarantee this work on all of them;
*/
(function () {
// Config
var NO_CAPTION = 'No Subtitle';
var HAVE_CAPTION = 'Download Subtitles';
var NO_VIDEO = 'No Video';
var HAVE_VIDEO = 'Download Video';
var NO_AUDIO = 'No Audio';
var HAVE_AUDIO = 'Download Audio';
var NO_VI_AU = 'No VidelAndAudio';
var HAVE_VI_AU = 'Download VidelAndAudio';
var TEXT_LOADING = 'Loading...';
const BUTTON_ID = 'youtube-parent-downloader-by-1c7-last-update-2021-2-21';
const CAPTION_BUTTON_ID = 'youtube-caption-downloader-by-1c7-last-update-2021-2-21';
const VIDEO_BUTTON_ID = 'youtube-video-downloader-by-1c7-last-update-2021-2-21';
const AUDIO_BUTTON_ID = 'youtube-audio-downloader-by-1c7-last-update-2021-2-21';
const VI_AU_BUTTON_ID = 'youtube-videoandaudio-downloader-by-1c7-last-update-2021-2-21';
// Config
var HASH_BUTTON_ID = `#${BUTTON_ID}`
var HASH_CAPTION_BUTTON_ID = `#${CAPTION_BUTTON_ID}`
var HASH_VIDEO_BUTTON_ID = `#${VIDEO_BUTTON_ID}`
var HASH_AUDIO_BUTTON_ID = `#${AUDIO_BUTTON_ID}`
var HASH_VI_AU_BUTTON_ID = `#${VI_AU_BUTTON_ID}`
//config
let VIDEO_FORMAT = 'mp4';
let AUDIO_FORMAT = 'mp3';
let CAPTION_FORMAT = 'srt'
// config
window.caption_array = null;
window.video_array = null;
window.audio_array = null;
window.vi_au_array = null;
//config
const CERTAIN_TYPE_INFO = {
"VIDEO": "video",
"AUDIO": "audio",
"VI_AU": "vi_au",
"CAPTION": "caption"
}
// initialize
var first_load = true;
// indicate if first load this webpage or not
var youtube_playerResponse_1c7 = null;
// trigger when first load
$(document).ready(function () {
start();
});
// Explain this function: we repeatly try if certain HTML element exist,
// if it does, we call init()
// if it doesn't, stop trying after certain time
function start() {
var retry_count = 0;
var RETRY_LIMIT = 30;
// use "setInterval" is because "$(document).ready()" still not enough, still too early
// 330 work for me.
if (new_material_design_version()) {
var material_checkExist = setInterval(function() {
if (document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer').length) {
init();
clearInterval(material_checkExist);
}
retry_count = retry_count + 1;
if (retry_count > RETRY_LIMIT) {
clearInterval(material_checkExist);
}
}, 330);
} else {
var checkExist = setInterval(function() {
if ($('#watch7-headline').length) {
init();
clearInterval(checkExist);
}
retry_count = retry_count + 1;
if (retry_count > RETRY_LIMIT) {
clearInterval(checkExist);
}
}, 330);
}
}
// trigger when loading new page
// (actually this would also trigger when first loading, that's not what we want, that's why we need to use firsr_load === false)
// (new Material design version would trigger this "yt-navigate-finish" event. old version would not.)
var body = document.getElementsByTagName("body")[0];
body.addEventListener("yt-navigate-finish", function (event) {
// 2021-8-9 测试结果：yt-navigate-finish 可以正常触发
if (current_page_is_video_page() === false) {
return;
}
youtube_playerResponse_1c7 = event.detail.response.playerResponse; // for auto subtitle
unsafeWindow.caption_array = []; // clean up (important, otherwise would have more and more item and cause error)
// if use click to another page, init again to get correct subtitle
if (first_load === false) {
remove_subtitle_download_button();
init();
}
});
// return true / false
// Detect [new version UI(material design)] OR [old version UI]
// I tested this, accurated.
function new_material_design_version() {
var old_title_element = document.getElementById('watch7-headline');
if (old_title_element) {
return false;
} else {
return true;
}
}
// return true / false
function current_page_is_video_page() {
return get_url_video_id() !== null;
}
// return string like "RW1ChiWyiZQ", from "https://www.youtube.com/watch?v=RW1ChiWyiZQ"
// or null
function get_url_video_id() {
return getURLParameter('v');
}
//https://stackoverflow.com/questions/11582512/how-to-get-url-parameters-with-javascript/11582513#11582513
function getURLParameter(name) {
return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search) || [null, ''])[1].replace(/\+/g, '%20')) || null;
}
// finish
function remove_subtitle_download_button() {
$(HASH_BUTTON_ID).remove();
}
function init() {
inject_our_script();
first_load = false;
}
// inject init button
function inject_our_script() {
var div = document.createElement('div')
, div_video = document.createElement('div')
, div_audio = document.createElement('div')
, div_vi_au = document.createElement('div')
, div_caption = document.createElement('div')
, controls = document.getElementById('watch7-headline');
var css_div = `display: table;
margin-top:4px;
margin-right:4px;
border: 1px solid rgb(0, 183, 90);
cursor: pointer; color: rgb(255, 255, 255);
border-top-left-radius: 3px;
border-top-right-radius: 3px;
border-bottom-right-radius: 3px;
border-bottom-left-radius: 3px;
background-color: #00B75A;
display:inline-block;
`;
div_video.setAttribute('style', css_div);
div_video.id = VIDEO_BUTTON_ID;
div_audio.setAttribute('style', css_div);
div_audio.id = AUDIO_BUTTON_ID;
div_vi_au.setAttribute('style', css_div);
div_vi_au.id = VI_AU_BUTTON_ID;
div_caption.setAttribute('style', css_div);
div_caption.id = CAPTION_BUTTON_ID;
div.id = BUTTON_ID
// generate selector
div_video.appendChild(generate_selector(CERTAIN_TYPE_INFO.VIDEO));
div_audio.appendChild(generate_selector(CERTAIN_TYPE_INFO.AUDIO));
div_vi_au.appendChild(generate_selector(CERTAIN_TYPE_INFO.VI_AU));
div_caption.appendChild(generate_selector(CERTAIN_TYPE_INFO.CAPTION));
// inject select to div element
div.appendChild(div_video)
div.appendChild(div_audio)
div.appendChild(div_vi_au)
div.appendChild(div_caption)
// put the div into page: new material design
var title_element = document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer');
if (title_element) {
$(title_element[0]).after(div);
}
// put the div into page: old version
if (controls) {
controls.appendChild(div);
}
}
// generate selector by type(type: video,audio,subtitle)
function generate_selector(type) {
let select = document.createElement('select')
let option = document.createElement('option')
select.id = type + 's_selector';
select.disabled = true;
let css_select = `display:block;
border: 1px solid rgb(0, 183, 90);
cursor: pointer;
color: rgb(255, 255, 255);
background-color: #00B75A;
padding: 4px;
`;
select.setAttribute('style', css_select);
option.textContent = TEXT_LOADING;
option.selected = true;
select.appendChild(option);
select.addEventListener('change', function() {
// downloading the data by type
download_mime_type(this, type);
}, false);
get_options_list(select, type);
return select;
}
//get options by type
async function get_options_list(select, type) {
//get video information
let video_data = get_youtube_data();
//select the data by type
let filter_list = getVideoInfoByType(video_data, type);
let HAVE_NAME = null;
let NO_NAME = null;
let HASH_BUTTON_ID = null;
switch (type) {
case CERTAIN_TYPE_INFO.VIDEO:
window.video_array = filter_list;
HAVE_NAME = HAVE_VIDEO;
NO_NAME = NO_VIDEO;
HASH_BUTTON_ID = HASH_VIDEO_BUTTON_ID;
break;
case CERTAIN_TYPE_INFO.AUDIO:
window.audio_array = filter_list;
HAVE_NAME = HAVE_AUDIO;
NO_NAME = NO_AUDIO;
HASH_BUTTON_ID = HASH_AUDIO_BUTTON_ID;
break;
case CERTAIN_TYPE_INFO.VI_AU:
window.vi_au_array = filter_list;
HAVE_NAME = HAVE_VI_AU;
NO_NAME = NO_VI_AU;
HASH_BUTTON_ID = HASH_VI_AU_BUTTON_ID;
break;
case CERTAIN_TYPE_INFO.CAPTION:
window.caption_array = filter_list;
HAVE_NAME = HAVE_CAPTION;
NO_NAME = NO_CAPTION;
HASH_BUTTON_ID = HASH_CAPTION_BUTTON_ID;
break;
default:
console.log("no match type")
}
// if no data at all, just say no and stop
if (filter_list == null || filter_list.length == 0) {
select.options[0].textContent = NO_NAME;
disable_download_button(HASH_BUTTON_ID);
return false;
}
// if at least one type of data exist
select.options[0].textContent = HAVE_NAME;
select.disabled = false;
let option = null;
filter_list.forEach(item=>{
option = document.createElement('option');
option.textContent = item.name;
select.appendChild(option);
}
)
}
// downloading the data by type
async function download_mime_type(selector, type) {
// if user select first <option>, we just return, do nothing.
if (selector.selectedIndex == 0) {
return;
}
// video_title
let name = get_title();
let selected = null;
let selected_name = selector.options[selector.selectedIndex].textContent;
let type_format = null;
switch (type) {
case CERTAIN_TYPE_INFO.VIDEO:
selected = window.video_array.filter(format=>format.name === selected_name);
type_format = VIDEO_FORMAT;
break;
case CERTAIN_TYPE_INFO.AUDIO:
selected = window.audio_array.filter(format=>format.name === selected_name);
type_format = AUDIO_FORMAT;
break;
case CERTAIN_TYPE_INFO.VI_AU:
selected = window.vi_au_array.filter(format=>format.name === selected_name);
type_format = VIDEO_FORMAT;
break;
case CERTAIN_TYPE_INFO.CAPTION:
selected = window.caption_array.filter(format=>format.name === selected_name);
type_format = CAPTION_FORMAT;
break;
default:
console.log("no match type")
}
console.log("selected url :", selected)
selected != null && selected.length != 0 && (CERTAIN_TYPE_INFO.CAPTION === type && await download_subtitle(name, selected[0].url, type_format) || judeSigcipher(selected[0]) && await fetch_mime_type(name, selected[0].url, type_format));
selector.options[0].selected = true;
}
//fetching the data by type using the streamSaver
async function fetch_mime_type(name, url, type) {
const fileStream = streamSaver.createWriteStream(`${name}.${type}`, {
size: 500,
// (optional filesize) Will show progress
writableStrategy: 500,
// (optional)
readableStrategy: undefined // (optional)
})
try {
let controller = new AbortController();
let signal = controller.signal;
const res = await fetch(url, {
signal: controller.signal
});
if (!res.ok) {
console.log("fetch failse:", res.ok)
return;
}
// abort so it dose not look stuck
const readableStream = res.body
if (window.WritableStream && readableStream.pipeTo) {
console.log("pipe Stream")
return readableStream.pipeTo(fileStream).then(()=>console.log('done writing'))
} else {
window.wirter = fileStream.getWriter()
const reader = res.body.getReader()
const pump = ()=>reader.read().then(res=>res.done ? writer.close() : writer.write(res.value).then(pump))
pump()
}
window.onunload = ()=>{
fileStream.abort()
}
window.onbeforeunload = evt=>{
if (!done) {
evt.returnValue = `Are you sure you want to leave?`;
}
}
signal.addEventListener('abort', ()=>{
console.log('abort!')
fileStream.abort()
}
);
} catch (e) {
console.info("fetch failse:", e)
return;
}
}
//get youtube information by type
function getVideoInfoByType(video_data, type) {
if (!video_data || video_data instanceof Array)
throw new Error(`video_data'Desktop is false type`);
//判断视频是否可播放
if (video_data.playabilityStatus.status != 'OK')
throw new Error('video is not playability');
let format_list = [];
try {
switch (type) {
case CERTAIN_TYPE_INFO.VIDEO:
format_list = format_list.concat(video_data.streamingData.formats.filter((format)=>format.qualityLabel && !(format.audioQuality || format.audioBitrate)) || []).concat(video_data.streamingData.adaptiveFormats.filter((format)=>format.qualityLabel && !(format.audioQuality || format.audioBitrate)) || []);
format_list = format_list.filter((format)=>format.mimeType.indexOf("mp4") != -1 && format.mimeType.indexOf("avc1") != -1);
format_list = format_list.map((data)=>{
return {
'name': `${data.qualityLabel}--bitrate:${data.bitrate}`,
"url": data.url || data.signatureCipher,
"sig_cipher": data.url == undefined || data.url == null,
"sig_cipher_old": data.url == undefined || data.url == null
};
}
);
break;
case CERTAIN_TYPE_INFO.AUDIO:
format_list = format_list.concat(video_data.streamingData.formats.filter((format)=>!format.qualityLabel && (format.audioQuality || format.audioBitrate)) || []).concat(video_data.streamingData.adaptiveFormats.filter((format)=>!format.qualityLabel && (format.audioQuality || format.audioBitrate)) || []);
format_list = format_list.filter((format)=>format.mimeType.indexOf("mp4") != -1);
format_list = format_list.map((data)=>{
return {
'name': data.audioQuality,
"url": data.url || data.signatureCipher,
"sig_cipher": data.url == undefined || data.url == null,
"sig_cipher_old": data.url == undefined || data.url == null
};
}
);
break;
case CERTAIN_TYPE_INFO.VI_AU:
format_list = format_list.concat(video_data.streamingData.formats.filter((format)=>format.qualityLabel && (format.audioQuality || format.audioBitrate)) || []).concat(video_data.streamingData.adaptiveFormats.filter((format)=>format.qualityLabel && (format.audioQuality || format.audioBitrate)) || []);
format_list = format_list.filter((format)=>format.mimeType.indexOf("mp4") != -1);
format_list = format_list.map((data)=>{
return {
'name': data.qualityLabel + "," + data.audioQuality,
"url": data.url || data.signatureCipher,
"sig_cipher": data.url == undefined || data.url == null,
"sig_cipher_old": data.url == undefined || data.url == null
};
}
);
break;
case CERTAIN_TYPE_INFO.CAPTION:
format_list = format_list.concat(video_data.captions.playerCaptionsTracklistRenderer.captionTracks || []);
format_list = format_list.map((data)=>{
return {
'name': data.name.simpleText,
"url": data.baseUrl
};
}
);
break;
default:
throw new Error('type variable is missing or not in the range');
}
} catch (e) {
console.error("error in get list in type" + type)
}
return format_list
}
function disable_download_button(HASH_BUTTON_ID) {
$(HASH_BUTTON_ID).css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color', '#95a5a6');
$('#captions_selector').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color', '#95a5a6');
if (new_material_design_version()) {
$(HASH_BUTTON_ID).css('padding', '6px');
} else {
$(HASH_BUTTON_ID).css('padding', '5px');
}
}
function get_youtube_data() {
return document.getElementsByTagName("ytd-app")[0].data.playerResponse
}
// get youtube vedio title
function get_title() {
var title_element = document.querySelector("h1.title.style-scope.ytd-video-primary-info-renderer");
if (title_element != null) {
var title = title_element.innerText;
if (title != undefined && title != null && title != "") {
return title;
}
}
return ytplayer.config.args.title;
}
//判断是否需要解密
function judeSigcipher(selected) {
if (!selected.sig_cipher)
return true;
try {
let searchParams = new URLSearchParams(selected.url);
let url = new URL(searchParams.get('url'));
// 进行解密
url.searchParams.set(searchParams.get('sp'), Sqa(searchParams.get('s')));
selected.url = url.toString();
selected.sig_cipher = false;
return true;
} catch (e) {
console.error("decipher error", e)
return false;
}
}
//解密单位函数
var Xx = {
kg: function(a, b) {
a.splice(0, b)
},
jl: function(a) {
a.reverse()
},
ti: function(a, b) {
var c = a[0];
a[0] = a[b % a.length];
a[b % a.length] = c
}
};
//解密函数
Sqa = function(a) {
a = a.split("");
Xx.kg(a, 2);
Xx.ti(a, 34);
Xx.kg(a, 2);
Xx.ti(a, 35);
Xx.jl(a, 74);
return a.join("")
};
//将下载的字幕从xml格式转化为SRT格式
function parse_youtube_XML_to_SRT(youtube_xml_string) {
let regexp = /<text start="(.*?)" dur="(.*?)">(.*?)<\/text>/g;
let value = null;
let index = 1;
let output = '';
while ((value = regexp.exec(youtube_xml_string)) !== null) {
let start = totime(value[1]);
let end = totime((value[1] * 10 + value[2] * 10) / 10);
output = output + `${index}\n${start[0]},${start[1]} --> ${end[0]},${end[1]}\n${htmlDecode(value[3])}\n\n`
index++;
}
return output;
}
// 对xml中字符进行格式化输出
function htmlDecode(input) {
var e = document.createElement('div');
e.class = 'dummy-element-for-tampermonkey-Youtube-Subtitle-Downloader-script-to-decode-html-entity';
e.innerHTML = input;
return e.childNodes.length === 0 ? "" : e.childNodes[0].nodeValue.replace(/&#(\d+);/gi, function(match, numStr) {
var num = parseInt(numStr, 10);
return String.fromCharCode(num);
});
}
function totime(ms) {
let date = new Date(ms * 1000 - 8 * 3600 * 1000);
return [date.toString().slice(16, 16 + 8), date.getMilliseconds()]
}
// trigger when user select <option>
async function download_subtitle(filename, url, type) {
// if user select first <option>, we just return, do nothing.
let response = await fetch(url);
let body = await readAllChunks(response.body)
let value = parse_youtube_XML_to_SRT(body);
//dowmload the subtitle
downloadString(value, "text/plain", filename,type);
return true;
}
async function readAllChunks(readableStream) {
const reader = readableStream.getReader();
const chunks = [];
let done, value;
var output = '';
while (!done) {
({ value, done } = await reader.read());
if (done) {
return output;
}
output = output + new TextDecoder().decode(value);
}
}
// copy from: https://gist.github.com/danallison/3ec9d5314788b337b682
// Thanks! https://github.com/danallison
// work in Chrome 66
// test passed: 2018-5-19
function downloadString(text, fileType, fileName, type) {
var blob = new Blob([text],{
type: fileType
});
var a = document.createElement('a');
a.download = `${fileName}.${type}`;
a.href = URL.createObjectURL(blob);
a.dataset.downloadurl = [fileType, a.download, a.href].join(':');
a.style.display = "none";
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
setTimeout(function() {
URL.revokeObjectURL(a.href);
}, 1500);
}
})();