Video Speeder のソースコード

Video Speeder

Control video playback speed on any website, including advertisements. Seamlessly adjust video playback rates to suit your viewing preferences without being restricted by website constraints or ad blockers.

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// ==UserScript==
// @name         Video Speeder
// @namespace    leyuskc.video-speeder
// @version      2024-05-22
// @description  Control video playback speed on any website, including advertisements. Seamlessly adjust video playback rates to suit your viewing preferences without being restricted by website constraints or ad blockers.
// @author       leyuskc
// @match        *://*/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=tampermonkey.net
// @grant        none
// @contact     mailto:[email protected]
// @supportURL   https://twitter.com/leyuskc
// @license MIT
// ==/UserScript==

(function() {
    'use strict';

    // Function to control video playback based on key input
    const controlVideo = (key) => {
        // Get all the video elements
        const videos = document.querySelectorAll("video");

        // Helper function to apply changes to each video element
        const applyToVideos = (action,must_be_playing) => {
            videos.forEach(video => {
                if (must_be_playing && !video.paused) {
                    action(video);
                }else if(!must_be_playing){
                    action(video)
                }
            });
        };

        switch (key.toUpperCase()) {
            case 'S':
                // Increase playback rate
                applyToVideos(video => video.playbackRate += 0.25,true);
                break;
            case 'A':
                // Decrease playback rate
                applyToVideos(video => video.playbackRate -= 0.25,true);
                break;
            case 'Z':
                // Rewind 5 seconds
                applyToVideos(video => video.currentTime -= 5,true);
                break;
            case 'C':
                // Fast forward 5 seconds
                applyToVideos(video => video.currentTime += 5,true);
                break;
            case 'Q':
                // Toggle play/pause
                applyToVideos(video => video.paused ? video.play() : video.pause(),false);
                break;
            case 'D':
                // Toggle mute/unmute
                applyToVideos(video => video.muted = !video.muted,true);
                break;
        }
    };

    // Listen for keyup events, ignoring when the active element is an input field
    document.addEventListener('keyup', (event) => {
        if (document.activeElement.tagName.toLowerCase() !== 'input') {
            controlVideo(event.key);
        }
    });

})();