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X (Twitter) 视频画质修复

强制 X (Twitter) 播放最高画质的视频

  1. // ==UserScript==
  2. // @name                Video Quality Fixer for X (Twitter)
  3. // @name:zh             X (Twitter) 视频画质修复
  4. // @name:zh-CN          X (Twitter) 视频画质修复
  5. // @namespace           https://github.com/yuhaofe
  6. // @version             0.2.1
  7. // @description         Force highest quality playback for X (Twitter) videos.
  8. // @description:zh      强制 X (Twitter) 播放最高画质的视频
  9. // @description:zh-CN   强制 X (Twitter) 播放最高画质的视频
  10. // @author              yuhaofe
  11. // @match               https://x.com/*
  12. // @match               https://mobile.x.com/*
  13. // @match               https://twitter.com/*
  14. // @match               https://mobile.twitter.com/*
  15. // @grant               none
  16. // ==/UserScript==
  17.  
  18. (function() {
  19.     'use strict';
  20.     initHijack();
  21.     initUI();
  22.     
  23.     function initHijack() {
  24.         var realOpen = window.XMLHttpRequest.prototype.open;
  25.         window.XMLHttpRequest.prototype.open = hijackedOpen;
  26.         
  27.         function hijackedOpen() {
  28.             var url = arguments['1'];
  29.             if (isHLSPlaylist(url)) {
  30.                 this.addEventListener('readystatechange', function(e) {
  31.                     if (this.readyState === 4) {
  32.                         var originalText = e.target.responseText;
  33.                         if(isMasterPlaylist(originalText)) {
  34.                             var modifiedText = modifyMasterPlaylist(originalText);
  35.                             Object.defineProperty(this, 'response', {writable: true});
  36.                             Object.defineProperty(this, 'responseText', {writable: true});
  37.                             this.response = this.responseText = modifiedText;
  38.                         }
  39.                     }
  40.                 });
  41.             }
  42.             return realOpen.apply(this, arguments);
  43.         };
  44.  
  45.         function isHLSPlaylist(url) {
  46.             var reg = new RegExp(/^https:\/\/video\.twimg\.com\/.+m3u8?/, 'i') ;
  47.             return reg.test(url);
  48.         }
  49.  
  50.         function isMasterPlaylist(text) {
  51.             return text.indexOf('#EXT-X-TARGETDURATION') === -1 && text.indexOf('#EXT-X-STREAM-INF') != -1;
  52.         }
  53.  
  54.         function modifyMasterPlaylist(text) {
  55.             var result = text;
  56.             var reg = new RegExp(/^#EXT-X-STREAM-INF:.*BANDWIDTH=(\d+).*\r?\n.*$/, 'gm');
  57.             var stream = reg.exec(text);
  58.             if (stream) {
  59.                 var globalTags = text.substring(0, stream.index);
  60.  
  61.                 // find max bitrate media playlist
  62.                 var maxBitrateStream = stream;
  63.                 while((stream = reg.exec(text)) != null){
  64.                     if (parseInt(stream[1]) > parseInt(maxBitrateStream[1])) {
  65.                         maxBitrateStream = stream;
  66.                     }
  67.                 }
  68.     
  69.                 result = globalTags + maxBitrateStream[0];
  70.             }
  71.             return result;
  72.         }
  73.     }
  74.     
  75.     function initUI() {
  76.         // add a mark helps identify if userscript loaded successfully
  77.         var disableHQ = localStorage.getItem('vqfft-disablehq');
  78.         if(!disableHQ) {
  79.             var mark = document.createElement('button');
  80.             mark.innerText = 'HQ';
  81.             mark.style = "position: fixed;right: 5px;top: 5px;color: white;border-width: 0px;border-radius: 5px;background-color: gray;opacity: 0.5;";
  82.             mark.onclick = function() {
  83.                 if(confirm('Do not display HQ mark anymore?')){
  84.                     localStorage.setItem('vqfft-disablehq', 'true');
  85.                     mark.remove();
  86.                 }
  87.             };
  88.             document.body.appendChild(mark);
  89.         }
  90.     }
  91. })();
  92.