js实现多轨道音频时间轴混流混音代码-html代码-BFW代码库

代码语言：html

所属分类：多媒体

代码描述：js实现多轨道音频时间轴混流混音代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>HTML5 音频编辑器</title>
    <!-- Font Awesome for icons -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css">
    <style>
        :root {
            --primary-color: #007bff;
            --primary-hover-color: #0056b3;
            --secondary-color: #6c757d;
            --light-gray: #f8f9fa;
            --medium-gray: #e9ecef;
            --dark-gray: #343a40;
            --border-color: #ced4da;
            --text-color: #212529;
            --clip-bg: #28a745; /* Green for clips */
            --clip-border: #1e7e34;
            --danger-color: #dc3545;
            --danger-hover-color: #c82333;
            --ruler-mark-width: 60px; /* Used by JS for PIXELS_PER_SECOND logic */
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            margin: 0;
            background-color: var(--light-gray);
            color: var(--text-color);
            display: flex;
            flex-direction: column;
            height: 100vh;
            overflow: hidden; /* Prevent body scroll, specific areas will scroll */
        }

        .app-container {
            display: flex;
            flex-direction: column;
            flex-grow: 1;
            padding: 15px;
            gap: 15px;
            overflow: hidden;
        }

        header {
            background-color: var(--dark-gray);
            color: white;
            padding: 10px 20px;
            text-align: center;
            flex-shrink: 0;
        }
        header h1 { margin: 0; font-size: 1.5em; }

        .main-controls {
            background-color: white;
            padding: 10px 15px;
            border-radius: 5px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }

        .main-controls button, .track-actions button {
            padding: 8px 12px;
            background-color: var(--primary-color);
            color: white;
            border: none;
            cursor: pointer;
            border-radius: 4px;
            transition: background-color 0.2s ease;
            font-size: 0.9em;
            display: inline-flex; /* For icon alignment */
            align-items: center;   /* For icon alignment */
        }
        .main-controls button i, .track-actions button i { margin-right: 6px; }
        .main-controls button:hover, .track-actions button:hover { background-color: var(--primary-hover-color); }
        .main-controls button:disabled, .track-actions button:disabled { background-color: #ccc; cursor: not-allowed; }

        .playback-controls { display: flex; gap: 8px; }
        .playback-controls button { background-color: var(--secondary-color); }
        .playback-controls button:hover { background-color: #5a6268; }


        #currentTimeDisplay {
            font-family: 'Courier New', Courier, monospace;
            font-size: 1.2em;
            background-color: var(--medium-gray);
            padding: 8px 12px;
            border-radius: 3px;
            min-width: 130px;
            text-align: center;
            color: var(--dark-gray);
            font-weight: bold;
        }

        .tracks-editor-area {
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            background-color: white;
            border-radius: 5px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            overflow: hidden;
        }

        .tracks-area-wrapper {
            position: relative;
            flex-grow: 1;
            overflow: auto;
        }

        .timeline-ruler {
            height: 30px;
            background-color: var(--medium-gray);
            position: sticky;
            top: 0;
            z-index: 10;
            display: flex;
            border-bottom: 1px solid var(--border-color);
            cursor: pointer;
            min-width: fit-content;
        }
        .ruler-mark {
            min-width: var(--ruler-mark-width); /* Controlled by CSS variable */
            border-left: 1px solid var(--border-color);
            font-size: 0.75em;
            text-align: center;
            padding-top: 8px;
            box-sizing: border-box;
            flex-shrink: 0;
            color: var(--secondary-color);
        }
        .ruler-mark:first-child { border-left: none; }

        #timelinePointer {
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0; /* Will span due to relative parent and height set by JS */
            width: 2px;
            background-color: var(--danger-color);
            z-index: 20;
            pointer-events: none;
        }

        #tracks {
            padding: 10px 0;
            min-width: fit-content;
        }
        .track {
            border: 1px solid var(--medium-gray);
            margin: 0 10px 10px 10px;
            min-height: 70px;
            position: relative;
            background-color: var(--light-gray);
            border-radius: 4px;
            padding-top: 45px; /* Space for header + some breathing room for clips */
            box-sizing: border-box;
        }
        .track-header {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 40px; /* Fixed height for header */
            font-size: 0.9em;
            color: var(--dark-gray);
            padding: 0 10px;
            background-color: #f1f3f5; /* Slightly different from track body */
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px dashed var(--border-color);
            box-sizing: border-box;
        }
        .track-name { font-weight: bold; }
        .track-actions button {
            background-color: transparent;
            color: var(--secondary-color);
            padding: 5px 8px;
            font-size: 0.9em;
        }
        .track-actions button:hover {
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