HTML5视频倍速

精准控制视频速度不跳帧(1=1x, 2=2x, 3=3x)

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(У мене вже є менеджер скриптів, дайте мені встановити його!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         HTML5视频倍速
// @namespace    http://tampermonkey.net/
// @version      1.0.3
// @description  精准控制视频速度不跳帧(1=1x, 2=2x, 3=3x)
// @author       重庆吴亦凡
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // 更稳定的样式注入
    const style = document.createElement('style');
    style.textContent = `
        .speed-hud {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(0,0,0,0.8);
            color: white;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 18px;
            font-family: Arial;
            z-index: 99999;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .speed-hud.show {
            opacity: 1;
        }
    `;
    document.head.appendChild(style);

    class VideoMaster {
        constructor() {
            this.speeds = {'1':1.0, '2':2.0, '3':3.0};
            this.hud = this.createHUD();
            this.currentVideo = null;
            this.observer = new MutationObserver(() => this.detectVideo());
            this.detectVideo();
        }

        createHUD() {
            const hud = document.createElement('div');
            hud.className = 'speed-hud';
            document.body.appendChild(hud);
            return hud;
        }

        detectVideo() {
            // 优先选择正在播放的视频
            const videos = Array.from(document.querySelectorAll('video'));
            this.currentVideo = videos.find(v => !v.paused) || videos[0];

            // 自动监控iframe内的视频
            if (!this.currentVideo) {
                document.querySelectorAll('iframe').forEach(iframe => {
                    try {
                        const iframeDoc = iframe.contentDocument;
                        if (iframeDoc) {
                            const iframeVideos = iframeDoc.querySelectorAll('video');
                            if (iframeVideos.length) {
                                this.currentVideo = iframeVideos[0];
                            }
                        }
                    } catch (e) {}
                });
            }

            // 开始观察DOM变化
            if (!this.observer) {
                this.observer = new MutationObserver(() => this.detectVideo());
                this.observer.observe(document.body, {
                    childList: true,
                    subtree: true
                });
            }
        }

        setSpeed(speed) {
            if (!this.currentVideo) {
                this.detectVideo();
                if (!this.currentVideo) return false;
            }

            // 保存当前播放时间(避免跳帧)
            const currentTime = this.currentVideo.currentTime;
            const wasPaused = this.currentVideo.paused;

            this.currentVideo.playbackRate = speed;
            this.currentVideo.currentTime = currentTime; // 锁定时间点

            if (!wasPaused) {
                this.currentVideo.play().catch(e => console.log(e));
            }

            this.showHUD(`${speed}x`);
            return true;
        }

        showHUD(text) {
            this.hud.textContent = `速度: ${text}`;
            this.hud.classList.add('show');
            clearTimeout(this.hudTimer);
            this.hudTimer = setTimeout(() => {
                this.hud.classList.remove('show');
            }, 1000);
        }
    }

    const vm = new VideoMaster();

    // 强化版事件监听
    document.addEventListener('keydown', function(e) {
        // 排除输入框/可编辑区域
        if (['INPUT','TEXTAREA'].includes(document.activeElement.tagName) ||
            document.activeElement.isContentEditable) return;

        // 只响应独立数字键(不响应组合键)
        if (['1','2','3'].includes(e.key) && !e.ctrlKey && !e.altKey && !e.metaKey) {
            e.stopImmediatePropagation();
            e.preventDefault();

            // 确保视频已加载
            if (!vm.currentVideo || vm.currentVideo.readyState < 2) {
                vm.detectVideo();
                if (!vm.currentVideo) return;
            }

            vm.setSpeed(vm.speeds[e.key]);
        }
    }, true); // 使用捕获阶段确保优先处理
})();