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feat(video): improve video playback with cross-fade transition

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Implement smooth transition between videos using CSS opacity animation
Add support for multiple video elements to enable seamless switching
This commit is contained in:
F04C
2025-07-16 14:43:33 +08:00
parent a09fd72659
commit 2dd0daceb4
3 changed files with 70 additions and 28 deletions
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index.html
+10 -5
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@@ -11,11 +11,16 @@
<body>
<!-- 视频背景 -->
<video autoplay muted id="bg-video">
<!-- 初始可以留空，或放一个默认视频 -->
<source id="video-source" src="视频资源/3D 建模图片制作.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<div class="video-container">
<video autoplay muted class="bg-video active" id="video1">
<source src="视频资源/3D 建模图片制作.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<video muted class="bg-video" id="video2">
<source src="" type="video/mp4">
Your browser does not support the video tag.
</video>
</div>
<!-- 内容层，覆盖在视频之上 -->
<div class="content-overlay">
script.js
+42 -19
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@@ -1,11 +1,14 @@
document.addEventListener('DOMContentLoaded', function() {
// 获取需要的 DOM 元素
const bgVideo = document.getElementById('bg-video');
const videoSource = document.getElementById('video-source');
let video1 = document.getElementById('video1');
let video2 = document.getElementById('video2');
const micButton = document.getElementById('mic-button');
const favorabilityBar = document.getElementById('favorability-bar');
let activeVideo = video1;
let inactiveVideo = video2;
// 视频列表
const videoList = [
'视频资源/3D 建模图片制作.mp4',
@@ -13,25 +16,45 @@ document.addEventListener('DOMContentLoaded', function() {
'视频资源/生成加油视频.mp4'
];
// --- 视频随机播放功能 ---
bgVideo.addEventListener('ended', function() {
// 获取当前播放的视频
const currentVideo = videoSource.getAttribute('src');
// 过滤掉当前视频，从剩下的视频中随机选择一个
let nextVideo = currentVideo;
while (nextVideo === currentVideo) {
// --- 视频交叉淡入淡出播放功能 ---
function switchVideo() {
// 1. 选择下一个视频
const currentVideoSrc = activeVideo.querySelector('source').getAttribute('src');
let nextVideoSrc = currentVideoSrc;
while (nextVideoSrc === currentVideoSrc) {
const randomIndex = Math.floor(Math.random() * videoList.length);
nextVideo = videoList[randomIndex];
nextVideoSrc = videoList[randomIndex];
}
// 设置新的视频源并播放
videoSource.setAttribute('src', nextVideo);
bgVideo.load();
bgVideo.play().catch(error => {
console.error("Video play failed:", error);
});
});
// 2. 设置不活动的 video 元素的 source
inactiveVideo.querySelector('source').setAttribute('src', nextVideoSrc);
inactiveVideo.load();
// 3. 当不活动的视频可以播放时，执行切换
inactiveVideo.addEventListener('canplaythrough', function onCanPlayThrough() {
// 确保事件只触发一次
inactiveVideo.removeEventListener('canplaythrough', onCanPlayThrough);
// 4. 播放新视频
inactiveVideo.play().catch(error => {
console.error("Video play failed:", error);
});
// 5. 切换 active class 来触发 CSS 过渡
activeVideo.classList.remove('active');
inactiveVideo.classList.add('active');
// 6. 更新角色
[activeVideo, inactiveVideo] = [inactiveVideo, activeVideo];
// 为新的 activeVideo 绑定 ended 事件
activeVideo.addEventListener('ended', switchVideo, { once: true });
}, { once: true }); // 使用 { once: true } 确保事件只被处理一次
}
// 初始启动
activeVideo.addEventListener('ended', switchVideo, { once: true });
// --- 麦克风按钮交互和好感度条模拟 ---
let isListening = false;
style.css
+18 -4
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@@ -13,15 +13,29 @@ html, body {
}
/* --- 视频背景 --- */
#bg-video {
.video-container {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: -1; /* 将视频置于最底层 */
object-fit: cover; /* 默认填满整个屏幕（裁剪），JS会切换它 */
background-color: #1a1a1a; /* 视频加载前的背景色 */
z-index: -1;
background-color: #1a1a1a;
}
.bg-video {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
object-fit: cover;
opacity: 0;
transition: opacity 1.5s ease-in-out; /* 交叉淡入淡出动画 */
}
.bg-video.active {
opacity: 1;
}
/* --- 内容覆盖层 --- */