// ==UserScript==
// @name Youtube 翻译中文字幕下载 v1
// @include https://*youtube.com/*
// @author Cheng Zheng
// @copyright 2018 Cheng Zheng;
// @license GNU GPL v3.0 or later. http://www.gnu.org/copyleft/gpl.html
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
// @version 1
// @grant GM_xmlhttpRequest
// @namespace https://greasyfork.org/users/5711
// @description Youtube 播放器右下角有个 Auto-tranlsate，可以把视频字幕翻成中文。这个脚本是下载这个中文字幕
// ==/UserScript==
/*
作者 : 郑诚
新浪微博: 糖醋陈皮 https://weibo.com/u/2004104451/home?wvr=5
邮箱 : [email protected]
测试视频：（代码在如下视频中试过，没有发现问题）
https://www.youtube.com/watch?v=nGlQkaoIfBI 1门语言
https://www.youtube.com/watch?v=O5nskjZ_GoI 13门语言
这个脚本有90%和我之前写的下载"完全字幕"的脚本一样：https://greasyfork.org/zh-CN/scripts/5368-youtube-subtitle-downloader-v14
这个只是把获取字幕地址的部分做了修改，拿到了翻译后的中文字幕地址。
*/
// CONFIG
var NO_SUBTITLE = 'No captions.';
var HAVE_SUBTITLE = '下载中文字幕';
var first_load = true;
// 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;
}
}
// trigger when first load (hit refresh button)
$(document).ready(function () {
// because document ready still not enough
// it's still too early, we have to wait certain element exist, then execute function.
if (new_material_design_version()) {
var material_checkExist = setInterval(function () {
if (document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer').length) {
init();
clearInterval(material_checkExist);
}
}, 330);
} else {
var checkExist = setInterval(function () {
if ($('#watch7-headline').length) {
init();
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) {
if (first_load === false) {
remove_subtitle_download_button();
init();
}
});
// trigger when loading new page
// (old version would trigger this "spfdone" event. new Material design version not sure yet.)
window.addEventListener("spfdone", function (e) {
if (current_page_is_video_page()) {
remove_subtitle_download_button();
var checkExist = setInterval(function () {
if ($('#watch7-headline').length) {
init();
clearInterval(checkExist);
}
}, 330);
}
});
// return true / false
function current_page_is_video_page() {
return get_video_id() !== null;
}
// return string like "RW1ChiWyiZQ", from "https://www.youtube.com/watch?v=RW1ChiWyiZQ"
// or null
function get_video_id() {
return getURLParameter('v');
}
//https://stackoverflow.com/questions/11582512/how-to-get-url-parameters-with-javascript/11582513#11582513
function getURLParameter(name) {
return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search) || [null, ''])[1].replace(/\+/g, '%20')) || null;
}
function remove_subtitle_download_button() {
$('#youtube-subtitle-downloader-by-1c7').remove();
}
function init() {
unsafeWindow.caption_array = [];
inject_our_script();
first_load = false;
}
function inject_our_script() {
var div = document.createElement('div'),
select = document.createElement('select'),
option = document.createElement('option'),
controls = document.getElementById('watch7-headline'); // Youtube video title DIV
if (new_material_design_version()) {
div.setAttribute('style', `display: table;
margin-top: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;
padding: 4px;
padding-right: 8px;
`);
} else {
div.setAttribute('style', `display: table;
margin-top: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;
padding: 3px;
padding-right: 8px;
`);
}
div.id = 'youtube-subtitle-downloader-by-1c7';
select.id = 'captions_selector';
select.disabled = true;
select.setAttribute('style', 'display:block; border: 1px solid rgb(0, 183, 90); cursor: pointer; color: rgb(255, 255, 255); background-color: #00B75A;');
option.textContent = '载入中...';
option.selected = true;
select.appendChild(option);
// 下拉菜单中选择后的事件侦听
select.addEventListener('change', function () {
download_subtitle(this);
}, false);
div.appendChild(select);
// put <select> into <div>
// 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);
}
load_language_list(select);
// <a> element is for download
var a = document.createElement('a');
a.style.cssText = 'display:none;';
a.setAttribute("id", "ForSubtitleDownload");
var body = document.getElementsByTagName('body')[0];
body.appendChild(a);
}
// Input: 语言代码（代表要从哪个语言转成中文）
// Ouput: 字幕的 URL，或者 false（找不到的话）
function get_chinese_subtitle_url(from_language_code) {
var raw_string = ytplayer.config.args.player_response;
var json = JSON.parse(raw_string);
var captionTracks = json.captions.playerCaptionsTracklistRenderer.captionTracks;
// 有多少种语言，captionTracks 就有多少个数组。
// 从 captionTracks 里面用 loop 来搜索对应语言。返回 baseUrl。
var baseURL = '';
for (var index in captionTracks) {
var caption = captionTracks[index];
if (caption.languageCode === from_language_code) {
baseURL = captionTracks[index].baseUrl;
}
}
if (baseURL == '') {
return false; // 上面的 loop 要是没找到对应的语言，导致 url 是空，那也只能返回 false
}
var chinese_subtitle_url = baseURL + "&tlang=zh-Hans"; // 转成中文字幕
return chinese_subtitle_url;
}
function download_subtitle(selector) {
var caption = caption_array[selector.selectedIndex - 1];
if (!caption) return;
var language_name_1c7 = caption.lang_name;
var from_language_code = caption.lang_code;
var url = get_chinese_subtitle_url(from_language_code);
jQuery.get(url).done(function (r) {
// format should look like this: (2018-2-10)
// youtube change their format from time to time. I already change my code to fit their new format twice
/*
<transcript>
<text start="54" dur="3">My name is Derpy Hooves</text>
<text start="57" dur="3">I am a simple pegasus pony from Ponyville</text>
<text start="65" dur="5">
However, there is something about me that you must know
</text>
<text start="78" dur="5">
I have strabismus, meaning that my eyes are not properly aligned with each others
</text>
<text start="113" dur="2">My problem was neurological</text>
<text start="115" dur="3">
The doctors couldn't do anything to ... correct the problem
</text>
<text start="122" dur="3">It's not only with my vision</text>
<text start="125" dur="3">It's also affecting the front of my body</text>
<text start="128" dur="2">Giving me my "Derpy Hooves"</text>
<text start="130" dur="5">
My clumsiness is so important it was represented by my cutie mark
</text>
<text start="135" dur="4">Seven bubbles representing luck and fragility</text>
<text start="139" dur="2">They joked about the way I acted</text>
<text start="141" dur="4">Saying that I was just stupid and silly</text>
<text start="145" dur="2">This was not my fault</text>
<text start="147" dur="3">
This was the way I was and I couldn't do anything about it
</text>
<text start="158" dur="2">I wished to get my body fixed</text>
<text start="160" dur="2">Later I realised this was not what I really wanted</text>
<text start="162" dur="3">I wanted respect, and I had to earn it by mysel</text>
<text start="196" dur="4">
Despite being a great flyer raised by a former Wonderbolts member
</text>
<text start="200" dur="2">I couldn't join them because</text>
<text start="202" dur="2">They didn't trust my impaired vision</text>
<text start="213" dur="2">Instead, I used my silly eyes as an advantage</text>
<text start="215" dur="3">And became one of the best mailmares in Ponyville</text>
<text start="260" dur="3">
I know I will have to live with this for the rest of my life
</text>
<text start="263" dur="2">But I don't really mind anymore</text>
<text start="265" dur="4">
My best memories are the voices of my friends and my familly, I don't need perfect vision to be happy
</text>
<text start="273" dur="3">I might be unable to walk correctly either</text>
<text start="276" dur="2">But I still got my wings, and I will live with it</text>
<text start="327" dur="4">
And I won't allow you to blind those who are important to me
</text>
</transcript>
sometime it's different:
https://video.google.com/timedtext?hl=en&lang=en&name=&v=a8uyilHatBA
<transcript>
<text start="0.07" dur="3.569">
About a year ago, Elon Musk was sitting in traffic in Los Angeles, and thought about
</text>
<text start="3.639" dur="2.971">
how cool it would be if he built a tunnel under the city.
</text>
<text start="6.61" dur="1.21">So he built a tunnel under the city.</text>
<text start="7.82" dur="2.279">And he started selling hats for his tunnel.</text>
<text start="10.099" dur="3.931">
50,000 hats later, he got bored with hats, and switched the hats out for flamethrowers.
</text>
<text start="14.03" dur="3.999">
He sold 20,000 of those, and then five days later he tied his car up to the most powerful
</text>
<text start="18.029" dur="3.431">rocket ever made, and shot it into fuckin space.</text>
<text start="23.1" dur="2.44">And then the rocket fuckin landed itself.</text>
</transcript>
*/
var text = r.getElementsByTagName('text');
// 拿所有 text 节点
var result = "";
var BOM = "\uFEFF";
result = BOM + result;
// 保存结果的字符串
for (var i = 0; i < text.length; i++) {
var index = i + 1;
// 这个是字幕的索引, 从1开始的, 但是因为我们的循环是从0开始的, 所以加个1
var content = text[i].textContent.replace(/\n/g, " ");
// content 保存的是字幕内容 - 这里把换行换成了空格, 因为 Youtube 显示的多行字幕中间会有个\n, 如果不加这个replace. 两行的内容就会黏在一起.
var start = parseFloat(text[i].getAttribute('start'));
var end = start + parseFloat(text[i].getAttribute('dur'));
if (!end) {
end = start + 5;
}
// ==== 开始处理数据, 把数据保存到result里. ====
result = result + index + escape('\r\n');
// 把序号加进去
var start_time = process_time(parseFloat(start));
result = result + start_time;
// 拿到 开始时间 之后往result字符串里存一下
result = result + ' --> ';
// 标准srt时间轴: 00:00:01,850 --> 00:00:02,720
// 我们现在加个中间的箭头..
var end_time = process_time(parseFloat(end));
result = result + end_time + escape('\r\n');
// 拿到 结束时间 之后往result字符串里存一下
result = result + content + escape('\r\n\r\n');
// 加字幕内容
}
var title = get_file_name(language_name_1c7);
downloadFile(title, result);
// 下载
}).fail(function () {
alert("Error: No response from server.");
});
selector.options[0].selected = true;
// 下载后把 <select> 选回第一个元素.
}
// Return something like: "(English)How Did Python Become A Data Science Powerhouse?.srt"
function get_file_name(language_name) {
if (new_material_design_version()) {
var title_element = document.querySelectorAll('.title.style-scope.ytd-video-primary-info-renderer');
var video_name = title_element[0].childNodes[0].data;
return '(' + language_name + ' 转中文)' + video_name + '.srt';
} else {
return '(' + language_name + ' 转中文)' + unsafeWindow.ytplayer.config.args.title + '.srt';
}
}
// 载入有多少种语言, 然后加到 <select> 里
function load_language_list(select) {
GM_xmlhttpRequest({
method: 'GET',
url: 'https://video.google.com/timedtext?hl=en&v=' + get_video_id() + '&type=list',
onload: function (xhr) {
var caption, option, caption_info,
captions = new DOMParser().parseFromString(xhr.responseText, "text/xml").getElementsByTagName('track');
if (captions.length === 0) {
select.options[0].textContent = NO_SUBTITLE;
if (new_material_design_version()) {
$('#youtube-subtitle-downloader-by-1c7').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color', '#95a5a6').css('padding', '6px');
$('#captions_selector').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color', '#95a5a6');
} else {
$('#youtube-subtitle-downloader-by-1c7').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color', '#95a5a6').css('padding', '5px');
$('#captions_selector').css('border', '#95a5a6').css('cursor', 'not-allowed').css('background-color', '#95a5a6');
}
return false;
}
for (var i = 0, il = captions.length; i < il; i++) {
caption = captions[i];
option = document.createElement('option');
caption_info = {
name: caption.getAttribute('name'),
lang_code: caption.getAttribute('lang_code'),
lang_name: caption.getAttribute('lang_translated')
};
caption_array.push(caption_info);
// 注意这里是加到 caption_array, 一个全局变量, 我们待会要依靠它来下载.
option.textContent = caption_info.lang_name + " -> 翻译成中字";
select.appendChild(option);
}
select.options[0].textContent = HAVE_SUBTITLE;
select.disabled = false;
}
});
}
// 处理时间. 比如 start="671.33" start="37.64" start="12" start="23.029"
// 处理成 srt 时间, 比如 00:00:00,090 00:00:08,460 00:10:29,350
function process_time(s) {
s = s.toFixed(3);
// 超棒的函数, 不论是整数还是小数都给弄成3位小数形式
// 举个柚子:
// 671.33 -> 671.330
// 671 -> 671.000
// 注意函数会四舍五入. 具体读文档
var array = s.split('.');
// 把开始时间根据句号分割
// 671.330 会分割成数组: [671, 330]
var Hour = 0;
var Minute = 0;
var Second = array[0]; // 671
var MilliSecond = array[1]; // 330
// 先声明下变量, 待会把这几个拼好就行了
// 我们来处理秒数. 把"分钟"和"小时"除出来
if (Second >= 60) {
Minute = Math.floor(Second / 60);
Second = Second - Minute * 60;
// 把 秒 拆成 分钟和秒, 比如121秒, 拆成2分钟1秒
Hour = Math.floor(Minute / 60);
Minute = Minute - Hour * 60;
// 把 分钟 拆成 小时和分钟, 比如700分钟, 拆成11小时40分钟
}
// 分钟，如果位数不够两位就变成两位，下面两个if语句的作用也是一样。
if (Minute < 10) {
Minute = '0' + Minute;
}
// 小时
if (Hour < 10) {
Hour = '0' + Hour;
}
// 秒
if (Second < 10) {
Second = '0' + Second;
}
return Hour + ':' + Minute + ':' + Second + ',' + MilliSecond;
}
function downloadFile(fileName, content) {
var TITLE = unsafeWindow.ytplayer.config.args.title; // Video title
var version = getChromeVersion();
// dummy element for download
if ($('#youtube-subtitle-downloader-dummy-element-for-download').length > 0) {
} else {
$("body").append('<a id="youtube-subtitle-downloader-dummy-element-for-download"></a>');
}
var dummy = $('#youtube-subtitle-downloader-dummy-element-for-download');
// 判断 Chrome 版本选择下载方法，Chrome 52 和 53 的文件下载方式不一样
if (version > 52) {
dummy.attr('download', fileName);
dummy.attr('href', 'data:Content-type: text/plain,' + htmlDecode(content));
dummy[0].click();
} else {
downloadViaBlob(fileName, htmlDecode(content));
}
}
// 复制自： http://www.alloyteam.com/2014/01/use-js-file-download/
// Chrome 53 之后这个函数失效。52有效。
function downloadViaBlob(fileName, content) {
var aLink = document.createElement('a');
var blob = new Blob([content]);
var evt = document.createEvent("HTMLEvents");
evt.initEvent("click", false, false);
aLink.download = fileName;
aLink.href = URL.createObjectURL(blob);
aLink.dispatchEvent(evt);
}
//http://stackoverflow.com/questions/4900436/how-to-detect-the-installed-chrome-version
function getChromeVersion() {
var raw = navigator.userAgent.match(/Chrom(e|ium)\/([0-9]+)\./);
return raw ? parseInt(raw[2], 10) : false;
}
// https://css-tricks.com/snippets/javascript/unescape-html-in-js/
// turn HTML entity back to text, example: " should be "
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;
}
