YouTube Speed-Adjusted Time Display/Timecode Updater/Playback Speed Timecode

Shows speed-adjusted timecode for YouTube videos
当前为 2024-10-22 提交的版本，查看最新版本。
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// ==UserScript==
// @name         YouTube Speed-Adjusted Time Display/Timecode Updater/Playback Speed Timecode
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Shows speed-adjusted timecode for YouTube videos
// @author       kavinned
// @match        https://www.youtube.com/*
// @grant        none
// @icon         https://www.google.com/s2/favicons?sz=64&domain=YouTube.com
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    function updateTimeDisplay() {
        const video = document.querySelector('video');
        if (!video) return;

        const currentTimeDisplay = document.querySelector('.ytp-time-current');
        const durationDisplay = document.querySelector('.ytp-time-duration');

        if (!currentTimeDisplay || !durationDisplay) return;

        const currentTime = video.currentTime;
        const duration = video.duration;
        const playbackRate = video.playbackRate;

        const adjustedCurrentTime = currentTime / playbackRate;
        const adjustedDuration = duration / playbackRate;

        function formatTime(seconds) {
            const hours = Math.floor(seconds / 3600);
            const minutes = Math.floor((seconds % 3600) / 60);
            const secs = Math.floor(seconds % 60);

            if (hours > 0) {
                return `${hours}:${minutes.toString().padStart(2, '0')}:${secs.toString().padStart(2, '0')}`;
            } else {
                return `${minutes}:${secs.toString().padStart(2, '0')}`;
            }
        }

        currentTimeDisplay.textContent = formatTime(adjustedCurrentTime);
        durationDisplay.textContent = formatTime(adjustedDuration);
    }

    function createSpeedTimeDisplay() {
        const timeDisplay = document.querySelector('.ytp-time-display');
        if (!timeDisplay || document.querySelector('.speed-adjusted-time')) return;

        const speedTimeDiv = document.createElement('div');
        speedTimeDiv.className = 'speed-adjusted-time ytp-time-display';
        speedTimeDiv.style.marginLeft = '10px';
        speedTimeDiv.style.color = '#fff';
        speedTimeDiv.style.fontSize = '14px';
        timeDisplay.parentNode.insertBefore(speedTimeDiv, timeDisplay.nextSibling);
    }

    const observer = new MutationObserver((mutations) => {
        if (document.querySelector('video')) {
            createSpeedTimeDisplay();
            updateTimeDisplay();
        }
    });

    observer.observe(document.body, {
        childList: true,
        subtree: true
    });

    setInterval(updateTimeDisplay, 1000);

    document.addEventListener('ratechange', updateTimeDisplay, true);
})();