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bilidl

download bilibili DASH videos as fast as possible

  1. // ==UserScript==
  2. // @name                 bilidl
  3. // @name:zh-CN           bilidl
  4. // @namespace            https://tampermonkey.net/
  5. // @version              0.1.1
  6. // @description          download bilibili DASH videos as fast as possible
  7. // @description:zh-CN    B站DASH流视频下载
  8. // @author               shiroikoi
  9. // @match                https://www.bilibili.com/bangumi/play/*
  10. // @match                https://www.bilibili.com/video/*
  11. // @grant                none
  12. // @run-at               document-idle
  13. // @require              https://cdn.jsdelivr.net/npm/vue@2.6.11/dist/vue.min.js
  14. // @require              https://unpkg.com/@ffmpeg/ffmpeg@0.7.0/dist/ffmpeg.min.js
  15. // @require              https://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.2/jquery.min.js
  16. // @compatible           firefox >=52
  17. // @compatible           chrome >=57
  18. // @license              MIT
  19. // ==/UserScript==
  20.  
  21. (function () {
  22.     'use strict';
  23.     let controller, fileName, dataObj, qualityList, videoList;
  24.     let span = document.createElement("span"),
  25.         option = document.createElement("option"),
  26.         div = document.createElement("div"),
  27.         select = document.createElement("select"),
  28.         button = document.createElement("button");
  29.     let loop = function (i) {
  30.         if ($(i)[0] === undefined) {
  31.             setTimeout(() => {
  32.                 loop(i);
  33.             }, 1000)
  34.         } else {
  35.             fileName = $(i)[0].textContent
  36.         }
  37.     }
  38.  
  39.     if ($(".special-cover")[0] != undefined) {
  40.         div.style.position = "absolute"
  41.     }
  42.     div.style.marginLeft = "137.667px"
  43.     button.style.width = "90px"
  44.     button.style.height = "49px"
  45.     button.style.fontSize = "20px"
  46.     select.style.fontSize = "20px"
  47.     select.style.height = "45px"
  48.     select.style.width = "320px"
  49.     span.style.fontSize = "20px"
  50.     button.setAttribute("v-on:click", "click")
  51.     option.setAttribute("v-for", "i in options")
  52.     button.textContent = "{{text}}"
  53.     option.textContent = "{{ i }}"
  54.     span.textContent = "{{text}}"
  55.  
  56.     if (window.location.href.match(/video/)) {
  57.         $("#video-page-app")[0].after(div)
  58.         div.prepend(select)
  59.         select.after(button)
  60.         select.prepend(option)
  61.         button.after(span)
  62.         loop(".tit")
  63.     } else if (window.location.href.match(/bangumi/)) {
  64.         $("#app")[0].before(div)
  65.         div.prepend(select)
  66.         select.after(button)
  67.         select.prepend(option)
  68.         button.after(span)
  69.         loop(".bilibili-player-video-top-title")
  70.     }
  71.  
  72.     //merge
  73.     const ffWorker = FFmpeg.createWorker();
  74.     (async function () { await ffWorker.load() })()
  75.     let mergeVideo = async (video, audio) => {
  76.         await ffWorker.write('video.mp4', video)
  77.         await ffWorker.write('audio.mp4', audio)
  78.         await ffWorker.run('-i video.mp4 -i audio.mp4 -c copy output.mp4', {
  79.             input: ['video.mp4', 'audio.mp4'],
  80.             output: 'output.mp4'
  81.         })
  82.         let data = await ffWorker.read('output.mp4')
  83.         await ffWorker.remove('output.mp4')
  84.         return data
  85.     }
  86.  
  87.     let statVm = new Vue({
  88.         el: span,
  89.         data: {
  90.             text: ""
  91.         }
  92.     })
  93.  
  94.     let buttVm = new Vue({
  95.         el: button,
  96.         data: {
  97.             text: "下载",
  98.             signal: false
  99.         },
  100.         methods: {
  101.             click: function () {
  102.                 if (buttVm.signal === false) {
  103.                     controller = new AbortController();
  104.                     this.signal = true
  105.                     this.stat2()
  106.                     for (let i = 0; i < seleVm.$el.length; i++) {
  107.                         let s = seleVm.$el[i]
  108.                         if (s.selected === true) {
  109.                             this.download(i)
  110.                         }
  111.                     }
  112.                 } else {
  113.                     //abort
  114.                     this.signal = false
  115.                     controller.abort()
  116.                     this.stat1()
  117.                     statVm.text = " 已取消!"
  118.                 }
  119.             },
  120.             download: async function (i) {
  121.                 try {
  122.                     let resV = await fetch(videoList[i].baseUrl.replace("http:", "https:"), { signal: controller.signal })
  123.                     let resA = await fetch(dataObj.dash.audio[0].baseUrl.replace("http:", "https:"), { signal: controller.signal })
  124.                     const readerV = resV.body.getReader()
  125.                     const readerA = resA.body.getReader()
  126.                     const VcontentLength = resV.headers.get('Content-Length')
  127.                     const AcontentLength = resA.headers.get('Content-Length')
  128.                     const totalLength = ((parseInt(VcontentLength) + parseInt(AcontentLength)) / (1024 * 1024)).toFixed(2);
  129.                     let receivedLength = 0;
  130.                     let vchunks = [];
  131.                     let achunks = [];
  132.                     //fetch progress
  133.                     while (true) {
  134.                         const { done, value } = await readerV.read()
  135.                         if (done) {
  136.                             break;
  137.                         }
  138.                         vchunks.push(value)
  139.                         receivedLength += value.length;
  140.                         statVm.text = ` 已下载:${(parseFloat(receivedLength) / 1024 / 1024).toFixed(2)}MiB 预计总:${totalLength}MiB`
  141.                     }
  142.                     while (true) {
  143.                         const { done, value } = await readerA.read()
  144.                         if (done) {
  145.                             break;
  146.                         }
  147.                         achunks.push(value)
  148.                         receivedLength += value.length;
  149.                         statVm.text = ` 已下载:${(parseFloat(receivedLength) / 1024 / 1024).toFixed(2)}MiB 预计总:${totalLength}MiB`
  150.                     }
  151.                     let vblob = new Blob(vchunks)
  152.                     let ablob = new Blob(achunks)
  153.                     statVm.text = ` 合并中... 预计总:${totalLength}MiB`
  154.                     let result = await mergeVideo(vblob, ablob)
  155.                     let blob = new Blob([result.data])
  156.                     let dl = document.createElement("a")
  157.                     dl.download = `${fileName}.mp4`
  158.                     dl.href = URL.createObjectURL(blob)
  159.                     dl.click()
  160.                     URL.revokeObjectURL(dl.href)
  161.                     dl.remove()
  162.                     statVm.text = ` 合并完成! 总:${totalLength}MiB`
  163.                     this.stat1()
  164.                     this.signal = false
  165.                 } catch (err) {
  166.                     console.log(err.name)
  167.                     if (err.name != "AbortError") { statVm.text = " 发生错误! 请重试" }
  168.                     this.stat1() 
  169.                 }
  170.             },
  171.             stat1: function () {
  172.                 this.text = "下载";
  173.                 this.$el.style.backgroundColor = ""
  174.             },
  175.             stat2: function () {
  176.                 this.text = "取消"
  177.                 this.$el.style.backgroundColor = "#99ccff"
  178.             }
  179.         }
  180.     })
  181.  
  182.     try {
  183.         // parse url
  184.         for (let i = 0; i < document.querySelectorAll("script").length; i++) {
  185.             if (/^window.__playinfo__/.test(document.querySelectorAll("script")[i].innerText)) {
  186.                 dataObj = JSON.parse(document.querySelectorAll("script")[i].innerText.replace("window.__playinfo__=", "")).data
  187.                 break
  188.             }
  189.         }
  190.         qualityList = [];
  191.         videoList = dataObj.dash.video;
  192.         videoList.forEach((item, index) => {
  193.             let fps
  194.             if (item.id == 116 || item.id == 74) {
  195.                 fps = "60"
  196.             } else { fps = "" }
  197.             qualityList[index] = item.height + "p" + fps + " " + item.mimeType.replace(/....../, "") + "-" + item.codecs
  198.         });
  199.     } catch (err) {
  200.         //error when parsing premium video with non-premium account or getting network issue
  201.         statVm.text = " 解析错误! 请尝试刷新页面";
  202.         buttVm.$el.disabled = true
  203.     }
  204.  
  205.     let optionsList = { options: qualityList }
  206.     let seleVm = new Vue({
  207.         el: select,
  208.         data: optionsList
  209.     })
  210. })();

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