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自定义视频播放速度

允许自定义视频播放速度

目前為 2023-07-14 提交的版本，檢視 最新版本。

  1. // ==UserScript==
  2. // @name         自定义视频播放速度
  3. // @version      2.1
  4. // @description  允许自定义视频播放速度
  5. // @author       ChatGPT
  6. // @match        http://*/*
  7. // @match        https://*/*
  8. // @grant        GM_setValue
  9. // @grant        GM_getValue
  10. // @run-at       document-end
  11. // @namespace    https://gf.qytechs.cn/users/452911
  12. // ==/UserScript==
  13.  
  14. function setVideoSpeed() {
  15.   'use strict';
  16.  
  17.   let videos = document.querySelectorAll('video,[class*="player"] *');
  18.   if (videos.length > 0 && !document.fullscreenElement) {
  19.     (function() {
  20.       'use strict';
  21.  
  22.       let defaultSpeed = 1;
  23.       let currentSpeed = defaultSpeed;
  24.  
  25.       let savedSpeed = GM_getValue('videoSpeed');
  26.       if (savedSpeed) {
  27.         defaultSpeed = parseFloat(savedSpeed);
  28.         currentSpeed = defaultSpeed; 
  29.       }
  30.  
  31.       let videos = document.querySelectorAll('video,[class*="player"] *');
  32.       for (let i = 0; i < videos.length; i++) {
  33.         videos[i].playbackRate = currentSpeed;
  34.       }
  35.  
  36.       let control = document.createElement('div');
  37.       control.textContent = '倍速控制';
  38.       control.style.cssText = `
  39.         position: fixed;
  40.         right: 5px;
  41.         top: 30px;
  42.         padding: 2px; 
  43.         background: #ddd;
  44.         border: 1px solid #999;
  45.         cursor: pointer;
  46.         z-index: 9999;
  47.       `;
  48.  
  49.       document.body.appendChild(control);
  50.  
  51.       control.addEventListener('click', () => {
  52.         let newSpeed = prompt('请输入新的播放倍速:', currentSpeed);
  53.         if (newSpeed) {
  54.           saveSpeed(newSpeed);
  55.           updateSpeed(newSpeed);
  56.         }
  57.       });
  58.  
  59.       function updateSpeed(newSpeed) {
  60.         for (let i = 0; i < videos.length; i++) {
  61.           videos[i].playbackRate = newSpeed;
  62.         }
  63.         currentSpeed = newSpeed;
  64.       }
  65.  
  66.       function saveSpeed(newSpeed) {
  67.         GM_setValue('videoSpeed', newSpeed);
  68.       }
  69.  
  70.       window.addEventListener('speedChanged', (e) => {
  71.         let newSpeed = e.data;
  72.         updateSpeed(newSpeed);
  73.       });
  74.  
  75.       let iframes = document.querySelectorAll('iframe');
  76.       iframes.forEach(applySpeed);
  77.  
  78.       function applySpeed(iframe) {
  79.         let doc = iframe.contentDocument;
  80.         let videos = doc.querySelectorAll('video,[class*="player"] *');
  81.         videos.forEach(v => v.playbackRate = currentSpeed);
  82.         let iframes = doc.querySelectorAll('iframe');
  83.         iframes.forEach(applySpeed);
  84.       }
  85.     })();
  86.   } 
  87. }
  88.  
  89. document.addEventListener('touchstart', () => {
  90.   setVideoSpeed(); 
  91. });
  92.  
  93. setVideoSpeed();

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