节拍器

原因

用Qwen做了一个节拍器,主要是拍合唱分镜时,每一次唱的节拍不固定,导致后期剪辑非常难受,常规节拍器有声音,也不能录进去,而且不能让大家都听到,但是用看的方式就好许多,于是就有了这个想法。

Snipaste_2025-03-28_21-02-58.png

具体代码

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<!DOCTYPE html>
<html>
<head>
<title>可定制节拍器</title>
<style>
:root {
--primary-bg: #1a1a1a;
--secondary-bg: #333;
--accent: #ff6b6b;
--text-color: white;
--border-radius: 8px;
}

body {
margin: 0;
height: 100vh;
display: flex;
flex-direction: column;
align-items: center;
background-color: var(--primary-bg);
color: var(--text-color);
transition: all 0.3s;
}

.container {
flex: 1;
width: 80%;
max-width: 400px;
display: flex;
flex-direction: column;
padding: 20px 0;
}

.beat-pad {
flex: 1;
width: 100%;
background-color: var(--secondary-bg);
border: 2px solid #444;
margin: 4px 0;
border-radius: var(--border-radius);
transition: background-color 0.2s;
}

.controls {
margin: 20px;
text-align: center;
}

.settings-panel {
position: fixed;
top: 0;
right: -320px;
width: 300px;
height: 100%;
background: var(--primary-bg);
padding: 20px;
transition: right 0.3s;
box-shadow: -2px 0 5px rgba(0,0,0,0.2);
}

.settings-panel.active {
right: 0;
}

.setting-group {
margin-bottom: 20px;
}

input[type="color"], input[type="range"] {
width: 100%;
margin: 8px 0;
}

button {
background: var(--secondary-bg);
color: var(--text-color);
border: none;
padding: 8px 16px;
margin: 5px 0;
cursor: pointer;
border-radius: 4px;
}

.preset-colors {
display: flex;
gap: 8px;
margin: 10px 0;
}

.preset-color {
width: 30px;
height: 30px;
border-radius: 50%;
cursor: pointer;
border: 2px solid #555;
}

.close-btn {
position: absolute;
right: 10px;
top: 10px;
background: none;
color: var(--text-color);
border: none;
font-size: 1.2em;
cursor: pointer;
}
</style>
</head>
<body>
<div class="container" id="beatContainer"></div>
<div class="controls">
<div>BPM: <span id="bpmDisplay">60</span></div>
<button onclick="toggleSettings()">⚙️ 设置</button>
<button onclick="toggleMetronome()" id="startStopBtn">开始</button>
</div>

<div class="settings-panel" id="settingsPanel">
<button class="close-btn" onclick="toggleSettings()">×</button>
<h3>设置</h3>

<div class="setting-group">
<label>速度 (BPM):</label>
<input type="range" id="bpmSlider" min="30" max="240" value="60">
<div class="bpm-value">60</div>
</div>

<div class="setting-group">
<label>主题模式:</label>
<select id="themeSelect" onchange="updateTheme()">
<option value="dark">深色模式</option>
<option value="light">亮色模式</option>
</select>
</div>

<div class="setting-group">
<label>节拍颜色:</label>
<div class="preset-colors">
<div class="preset-color" style="background: #ff6b6b" onclick="selectColor('#ff6b6b')"></div>
<div class="preset-color" style="background: #4ecdc4" onclick="selectColor('#4ecdc4')"></div>
<div class="preset-color" style="background: #45b7d1" onclick="selectColor('#45b7d1')"></div>
<div class="preset-color" style="background: #96ce7d" onclick="selectColor('#96ce7d')"></div>
</div>
<input type="color" id="customColor" value="#ff6b6b">
</div>

<div class="setting-group">
<label>圆角大小:</label>
<input type="range" id="radiusSlider" min="0" max="25" value="8">
<span id="radiusValue">8px</span>
</div>

<div class="setting-group">
<label>声音开关:</label>
<input type="checkbox" id="soundToggle" checked>
</div>
</div>

<script>
const beatContainer = document.getElementById('beatContainer');
const bpmDisplay = document.getElementById('bpmDisplay');
const bpmSlider = document.getElementById('bpmSlider');
const settingsPanel = document.getElementById('settingsPanel');
const customColor = document.getElementById('customColor');
const radiusSlider = document.getElementById('radiusSlider');
const radiusValue = document.getElementById('radiusValue');
const soundToggle = document.getElementById('soundToggle');

let currentStep = 0;
let intervalId = null;
let audioContext = new (window.AudioContext || window.webkitAudioContext)();
let soundEnabled = true;

// 创建四个节拍块
for(let i = 0; i < 4; i++) {
const pad = document.createElement('div');
pad.className = 'beat-pad';
beatContainer.appendChild(pad);
}

function playSound(isPrimary) {
if(!soundEnabled) return;

const oscillator = audioContext.createOscillator();
const gainNode = audioContext.createGain();

oscillator.type = isPrimary ? 'sine' : 'square';
oscillator.frequency.setValueAtTime(
isPrimary ? 440 : 880,
audioContext.currentTime
);

oscillator.connect(gainNode);
gainNode.connect(audioContext.destination);
gainNode.gain.setValueAtTime(0.3, audioContext.currentTime);

oscillator.start();
gainNode.gain.exponentialRampToValueAtTime(0.001, audioContext.currentTime + 0.1);
oscillator.stop(audioContext.currentTime + 0.1);
}

function updateMetronome() {
const pads = document.querySelectorAll('.beat-pad');
const bpm = parseInt(bpmDisplay.textContent);

// 重置所有颜色
pads.forEach(pad => pad.style.backgroundColor = 'var(--secondary-bg)');

// 设置当前节拍颜色和声音
if(currentStep < 3) {
pads[currentStep].style.backgroundColor = 'white';
playSound(true);
} else {
pads[currentStep].style.backgroundColor = 'var(--accent)';
playSound(false);
}

// 更新节拍位置
currentStep = (currentStep + 1) % 4;
}

function toggleMetronome() {
if(intervalId) {
clearInterval(intervalId);
intervalId = null;
document.getElementById('startStopBtn').textContent = '开始';
} else {
const bpm = parseInt(bpmDisplay.textContent);
const interval = (60 / bpm) * 1000;
intervalId = setInterval(updateMetronome, interval);
document.getElementById('startStopBtn').textContent = '停止';
updateMetronome();
}
}

function toggleSettings() {
settingsPanel.classList.toggle('active');
}

function updateTheme() {
const theme = document.getElementById('themeSelect').value;
const root = document.documentElement;

if(theme === 'dark') {
root.style.setProperty('--primary-bg', '#1a1a1a');
root.style.setProperty('--secondary-bg', '#333');
root.style.setProperty('--text-color', 'white');
} else {
root.style.setProperty('--primary-bg', 'white');
root.style.setProperty('--secondary-bg', '#f0f0f0');
root.style.setProperty('--text-color', '#1a1a1a');
}
}

function selectColor(color) {
customColor.value = color;
document.documentElement.style.setProperty('--accent', color);
}

function syncBPM() {
const value = bpmSlider.value;
bpmDisplay.textContent = value;
document.querySelector('.bpm-value').textContent = value;

if(intervalId) {
clearInterval(intervalId);
const interval = (60 / value) * 1000;
intervalId = setInterval(updateMetronome, interval);
}
}

function updateRadius() {
const radius = radiusSlider.value;
document.documentElement.style.setProperty('--border-radius', `${radius}px`);
radiusValue.textContent = `${radius}px`;
}

function toggleSound() {
soundEnabled = soundToggle.checked;
}

// 初始化设置
bpmSlider.addEventListener('input', syncBPM);
radiusSlider.addEventListener('input', updateRadius);
customColor.addEventListener('change', () => selectColor(customColor.value));
soundToggle.addEventListener('change', toggleSound);

// 初始化BPM显示
syncBPM();
</script>
</body>
</html>