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Fullscreen Video Speed Controller

Control playback speed, fix A/V sync issues, and seek for fullscreen videos

当前为 2025-05-16 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Fullscreen Video Speed Controller
  3. // @version      2.0.0
  4. // @description  Control playback speed, fix A/V sync issues, and seek for fullscreen videos
  5. // @author       Wanten
  6. // @copyright    2025 Wanten
  7. // @license      MIT
  8. // @supportURL   https://gist.github.com/WantenMN/c0afabc32a911d4dd10e06cff6bcb211
  9. // @homepageURL  https://gist.github.com/WantenMN/c0afabc32a911d4dd10e06cff6bcb211
  10. // @namespace    https://greasyfork.org/en/scripts/536243
  11. // @run-at       document-end
  12. // @match        https://*/*
  13. // @grant        none
  14. // ==/UserScript==
  15.  
  16. (function() {
  17.     'use strict';
  18.  
  19.     // Helper function to get the fullscreen video element
  20.     function getFullscreenVideo() {
  21.         if (document.fullscreenElement && document.fullscreenElement.tagName === 'VIDEO') {
  22.             return document.fullscreenElement;
  23.         }
  24.  
  25.         const videos = document.getElementsByTagName('video');
  26.         for (const video of videos) {
  27.             if (video.offsetWidth === window.innerWidth && video.offsetHeight === window.innerHeight) {
  28.                 return video;
  29.             }
  30.         }
  31.         return null;
  32.     }
  33.  
  34.     // Function to set the video speed
  35.     function setVideoSpeed(speed) {
  36.         const video = getFullscreenVideo();
  37.         if (video) {
  38.             video.playbackRate = speed;
  39.         }
  40.     }
  41.  
  42.     // Function to seek the video forward or backward
  43.     function seekVideo(offset) {
  44.         const video = getFullscreenVideo();
  45.         if (video) {
  46.             video.currentTime += offset;
  47.         }
  48.     }
  49.  
  50.     // Event listeners for key presses
  51.     document.addEventListener('keydown', function(event) {
  52.         switch(event.key) {
  53.             case 'j':
  54.                 setVideoSpeed(1.00);
  55.                 break;
  56.             case 'k':
  57.                 setVideoSpeed(2);
  58.                 break;
  59.             case 'l':
  60.                 setVideoSpeed(3.00);
  61.                 break;
  62.             case 'i': // Fix audio/video synchronization issues
  63.                 seekVideo(0.00001);
  64.                 break;
  65.             case 'h':
  66.                 seekVideo(-5); // Rewind 5 seconds
  67.                 break;
  68.             case ';':
  69.                 seekVideo(5); // Fast-forward 5 seconds
  70.                 break;
  71.         }
  72.     });
  73. })();