{"id":10021061,"date":"2025-11-02T01:35:34","date_gmt":"2025-11-01T17:35:34","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021061"},"modified":"2025-11-02T01:35:34","modified_gmt":"2025-11-01T17:35:34","slug":"java-%e9%ab%98%e6%95%88%e5%ae%9e%e7%8e%b0-wav-%e9%9f%b3%e9%a2%91%e6%8b%bc%e6%8e%a5%e5%bd%bb%e5%ba%95%e6%91%86%e8%84%b1-ffmpeg-%e7%9a%84%e8%bd%bb%e9%87%8f%e6%9c%ac%e5%9c%b0%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021061","title":{"rendered":"Java \u9ad8\u6548\u5b9e\u73b0 WAV \u97f3\u9891\u62fc\u63a5\u5f7b\u5e95\u6446\u8131 FFmpeg \u7684\u8f7b\u91cf\u672c\u5730\u65b9\u6848"},"content":{"rendered":"<h2>Java \u9ad8\u6548\u5b9e\u73b0 WAV \u97f3\u9891\u62fc\u63a5\uff1a\u5f7b\u5e95\u6446\u8131 FFmpeg \u7684\u7eaf\u672c\u5730\u65b9\u6848<\/h2>\n<h3>\u4e00\u3001\u80cc\u666f\uff1a\u4e3a\u4ec0\u4e48\u8981\u201c\u53bb FFmpeg \u5316\u201d<\/h3>\n<h4>1. FFmpeg \u7684\u4fbf\u5229\u4e0e\u5c40\u9650<\/h4>\n<p>\u5728\u97f3\u9891\u5904\u7406\u9886\u57df\uff0c<strong>FFmpeg<\/strong> \u662f\u51e0\u4e4e\u65e0\u6240\u4e0d\u80fd\u7684\u5b58\u5728\u3002<br \/>\u4ece\u97f3\u9891\u89e3\u7801\u3001\u683c\u5f0f\u8f6c\u6362\u3001\u62fc\u63a5\u5230\u6df7\u97f3\uff0c\u51e0\u4e4e\u6240\u6709\u4efb\u52a1\u90fd\u80fd\u7528\u4e00\u53e5\u547d\u4ee4\u5b8c\u6210\u3002\u7136\u800c\uff0c\u6b63\u56e0\u4e3a\u5b83\u201c\u5168\u80fd\u201d\uff0c\u4e5f\u610f\u5473\u7740\u201c\u7b28\u91cd\u201d\u3002<\/p>\n<p>\u5728 Java \u9879\u76ee\u4e2d\uff0c\u5f00\u53d1\u8005\u5e38\u901a\u8fc7 <code>ProcessBuilder<\/code> \u6216 <code>Runtime.exec()<\/code> \u8c03\u7528 FFmpeg \u547d\u4ee4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"bash\">ffmpeg -i &quot;concat:a.wav|b.wav&quot; -acodec copy output.wav<\/code><\/pre>\n<p>\u867d\u7136\u770b\u4f3c\u7b80\u5355\uff0c\u4f46\u5728\u5b9e\u9645\u5de5\u7a0b\u4e2d\u5f80\u5f80\u66b4\u9732\u51fa\u4e00\u7cfb\u5217\u95ee\u9898\uff1a<\/p>\n<ul>\n<li><strong>\uff081\uff09CPU \u5360\u7528\u9ad8<\/strong><br \/>FFmpeg \u5185\u90e8\u4f7f\u7528\u6d6e\u70b9\u5904\u7406\u4e0e\u7f13\u51b2\u6d41\u64cd\u4f5c\uff0c\u5f53\u62fc\u63a5\u591a\u4e2a\u97f3\u9891\u7247\u6bb5\u65f6\uff0cCPU \u8d1f\u8f7d\u53ef\u80fd\u9ad8\u8fbe 60% \u4ee5\u4e0a\u3002<\/li>\n<li><strong>\uff082\uff09\u78c1\u76d8 I\/O \u5f00\u9500\u5927<\/strong><br \/>\u62fc\u63a5\u6216\u8f6c\u7801\u8fc7\u7a0b\u901a\u5e38\u9700\u8981\u4e34\u65f6\u6587\u4ef6\uff0c\u5c24\u5176\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\uff0c\u78c1\u76d8\u9891\u7e41\u8bfb\u5199\u6781\u6613\u6210\u4e3a\u74f6\u9888\u3002<\/li>\n<li><strong>\uff083\uff09\u90e8\u7f72\u590d\u6742\u3001\u4f9d\u8d56\u91cd<\/strong><br \/>Java \u7a0b\u5e8f\u9700\u7ed1\u5b9a\u5916\u90e8\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u8fd9\u5bf9\u4e8e\u8de8\u5e73\u53f0\u90e8\u7f72\uff08\u5982 Docker\u3001JRE \u73af\u5883\u3001\u5d4c\u5165\u5f0f\u7cfb\u7edf\uff09\u6781\u4e0d\u53cb\u597d\u3002<\/li>\n<li><strong>\uff084\uff09\u5b89\u5168\u4e0e\u517c\u5bb9\u98ce\u9669<\/strong><br \/>\u5916\u90e8\u547d\u4ee4\u8c03\u7528\u6613\u53d7\u8def\u5f84\u6ce8\u5165\u3001\u6587\u4ef6\u540d\u7a7a\u683c\u7b49\u95ee\u9898\u5f71\u54cd\uff0c\u4e14 FFmpeg \u7248\u672c\u5dee\u5f02\u5927\uff0c\u53c2\u6570\u517c\u5bb9\u6027\u96be\u4ee5\u4fdd\u8bc1\u3002<\/li>\n<\/ul>\n<hr>\n<h4>2. Java \u539f\u751f\u97f3\u9891\u5904\u7406\u7684\u6f5c\u529b<\/h4>\n<p>Java \u6807\u51c6\u5e93\u5176\u5b9e\u65e9\u5df2\u63d0\u4f9b\u4e86\u57fa\u7840\u97f3\u9891\u652f\u6301\u5305 \u2014\u2014 <code>javax.sound.sampled<\/code>\u3002<br \/>\u5b83\u53ef\u4ee5\u8bfb\u53d6\u3001\u5199\u5165\u3001\u6df7\u5408 PCM \u6d41\uff0c\u5b9e\u73b0\u57fa\u672c\u7684\u5f55\u97f3\u3001\u64ad\u653e\u4e0e\u526a\u5207\u529f\u80fd\u3002<\/p>\n<p>\u7136\u800c\uff0cJDK \u81ea\u5e26 API \u504f\u5e95\u5c42\uff0c\u529f\u80fd\u6709\u9650\u3002<br \/>\u5982\u679c\u80fd\u5728\u6b64\u4e4b\u4e0a\u6784\u5efa\u4e00\u4e2a\u201c\u96f6\u8f6c\u7801\u201d\u7684\u97f3\u9891\u62fc\u63a5\u673a\u5236\uff0c\u5c31\u80fd\u5728<strong>\u6027\u80fd\u3001\u7a33\u5b9a\u6027\u3001\u53ef\u79fb\u690d\u6027<\/strong>\u4e4b\u95f4\u8fbe\u5230\u5e73\u8861\u3002<\/p>\n<p>\u4e8e\u662f\uff0c\u672c\u65b9\u6848\u5e94\u8fd0\u800c\u751f\uff1a<\/p>\n<blockquote><p>\u4f7f\u7528\u7eaf Java \u5b57\u8282\u6d41\u4e0e\u5185\u5b58\u6620\u5c04\u673a\u5236\uff0c\u5b9e\u73b0 WAV \u6587\u4ef6\u7684\u9ad8\u6027\u80fd\u62fc\u63a5\uff0c<br \/>\u4e0d\u4f9d\u8d56\u4efb\u4f55\u7b2c\u4e09\u65b9\u5e93\uff0c\u4e5f\u65e0\u9700 FFmpeg\u3002<\/p><\/blockquote>\n<hr>\n<h3>\u4e8c\u3001WAV \u6587\u4ef6\u7ed3\u6784\u8be6\u89e3\uff1a\u62fc\u63a5\u7684\u6838\u5fc3\u57fa\u7840<\/h3>\n<p>\u5728\u5b9e\u73b0\u62fc\u63a5\u524d\uff0c\u5fc5\u987b\u7406\u89e3 <strong>WAV \u6587\u4ef6\u683c\u5f0f<\/strong>\u3002<br \/>WAV \u5c5e\u4e8e <strong>RIFF (Resource Interchange File Format)<\/strong> \u6807\u51c6\u7684\u4e00\u79cd\u5c01\u88c5\u5f62\u5f0f\uff0c\u672c\u8d28\u4e0a\u662f\u4e00\u79cd\u7ed3\u6784\u5316\u7684\u4e8c\u8fdb\u5236\u5bb9\u5668\u3002<\/p>\n<hr>\n<h4>1. \u6587\u4ef6\u5934\uff08Header\uff09<\/h4>\n<p>\u6807\u51c6 WAV \u6587\u4ef6\u7684\u524d 44 \u5b57\u8282\u4e3a\u6587\u4ef6\u5934\uff0c\u7528\u4e8e\u5b58\u653e\u5143\u6570\u636e\uff1a<\/p>\n<table>\n<thead>\n<tr>\n<th>\u504f\u79fb\u91cf<\/th>\n<th>\u957f\u5ea6<\/th>\n<th>\u540d\u79f0<\/th>\n<th>\u63cf\u8ff0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0<\/td>\n<td>4<\/td>\n<td>\u201cRIFF\u201d<\/td>\n<td>\u6587\u4ef6\u6807\u8bc6\u7b26<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>4<\/td>\n<td>\u6587\u4ef6\u5927\u5c0f &#8211; 8<\/td>\n<td>\u6587\u4ef6\u603b\u957f\u5ea6<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>4<\/td>\n<td>\u201cWAVE\u201d<\/td>\n<td>\u683c\u5f0f\u58f0\u660e<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>4<\/td>\n<td>\u201cfmt \u201d<\/td>\n<td>\u683c\u5f0f\u5757\u6807\u8bc6<\/td>\n<\/tr>\n<tr>\n<td>16<\/td>\n<td>4<\/td>\n<td>\u5b50\u5757\u5927\u5c0f<\/td>\n<td>\u901a\u5e38\u4e3a 16\uff08PCM\uff09<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>2<\/td>\n<td>\u97f3\u9891\u683c\u5f0f<\/td>\n<td>1 \u8868\u793a PCM<\/td>\n<\/tr>\n<tr>\n<td>22<\/td>\n<td>2<\/td>\n<td>\u58f0\u9053\u6570<\/td>\n<td>1=\u5355\u58f0\u9053\uff0c2=\u7acb\u4f53\u58f0<\/td>\n<\/tr>\n<tr>\n<td>24<\/td>\n<td>4<\/td>\n<td>\u91c7\u6837\u7387<\/td>\n<td>\u5e38\u89c1\u4e3a 44100<\/td>\n<\/tr>\n<tr>\n<td>28<\/td>\n<td>4<\/td>\n<td>\u5b57\u8282\u7387<\/td>\n<td>SampleRate \u00d7 \u58f0\u9053 \u00d7 BitsPerSample \/ 8<\/td>\n<\/tr>\n<tr>\n<td>32<\/td>\n<td>2<\/td>\n<td>\u5757\u5bf9\u9f50<\/td>\n<td>\u6bcf\u4e2a\u91c7\u6837\u70b9\u5360\u7528\u7684\u5b57\u8282\u6570<\/td>\n<\/tr>\n<tr>\n<td>34<\/td>\n<td>2<\/td>\n<td>\u6bcf\u4e2a\u6837\u672c\u7684\u4f4d\u6570<\/td>\n<td>\u5e38\u89c1\u4e3a 16 \u4f4d<\/td>\n<\/tr>\n<tr>\n<td>36<\/td>\n<td>4<\/td>\n<td>\u201cdata\u201d<\/td>\n<td>\u6570\u636e\u5757\u6807\u8bc6<\/td>\n<\/tr>\n<tr>\n<td>40<\/td>\n<td>4<\/td>\n<td>\u6570\u636e\u5757\u957f\u5ea6<\/td>\n<td>\u5b9e\u9645 PCM \u6570\u636e\u957f\u5ea6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<h4>2. \u6570\u636e\u6bb5\uff08Data Chunk\uff09<\/h4>\n<p>\u7d27\u968f\u5176\u540e\u7684\u662f\u97f3\u9891 PCM \u6570\u636e\u90e8\u5206\u3002<br \/>\u8fd9\u90e8\u5206\u662f\u539f\u59cb\u91c7\u6837\u503c\u7684\u8fde\u7eed\u5b57\u8282\u5e8f\u5217\uff0c\u4e0d\u5305\u542b\u538b\u7f29\u4fe1\u606f\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4e00\u4e2a\u5355\u58f0\u9053\u300116 \u4f4d\u300144100 Hz \u7684\u97f3\u9891\uff0c\u6bcf\u79d2\u7684\u5b57\u8282\u6570\u4e3a\uff1a<\/p>\n<blockquote><p>44100 \u00d7 2 bytes = 88200 bytes\/s<\/p><\/blockquote>\n<p>\u8fd9\u610f\u5473\u7740\u62fc\u63a5\u591a\u4e2a\u540c\u683c\u5f0f WAV \u6587\u4ef6\uff0c\u53ea\u9700\uff1a<\/p>\n<ol>\n<li>\u53d6\u7b2c\u4e00\u4e2a\u6587\u4ef6\u7684\u524d 44 \u5b57\u8282\uff1b<\/li>\n<li>\u5c06\u6240\u6709\u97f3\u9891\u6570\u636e\u6bb5\u6309\u987a\u5e8f\u62fc\u63a5\uff1b<\/li>\n<li>\u91cd\u65b0\u8ba1\u7b97\u603b\u957f\u5ea6\u4e0e\u6570\u636e\u957f\u5ea6\u5b57\u6bb5\u3002<\/li>\n<\/ol>\n<hr>\n<h3>\u4e09\u3001\u62fc\u63a5\u539f\u7406\uff1a\u4ece\u5b57\u8282\u6d41\u5230\u6587\u4ef6\u5934\u66f4\u65b0<\/h3>\n<h4>1. \u6838\u5fc3\u903b\u8f91\u6982\u8ff0<\/h4>\n<p>\u6574\u4e2a\u62fc\u63a5\u6d41\u7a0b\u5206\u4e3a\u4e09\u4e2a\u9636\u6bb5\uff1a<\/p>\n<ol>\n<li><strong>\u9884\u5904\u7406\u9636\u6bb5<\/strong><br \/>\u6821\u9a8c\u6240\u6709\u6587\u4ef6\u7684\u97f3\u9891\u53c2\u6570\uff08\u91c7\u6837\u7387\u3001\u58f0\u9053\u3001\u4f4d\u6df1\u5ea6\uff09\u4e00\u81f4\uff1b<\/li>\n<li><strong>\u62fc\u63a5\u9636\u6bb5<\/strong><br \/>\u5c06\u6240\u6709\u8f93\u5165\u6587\u4ef6\u7684\u6570\u636e\u6d41\u5199\u5165\u540c\u4e00\u8f93\u51fa\u6587\u4ef6\uff1b<\/li>\n<li>\n<p><strong>\u540e\u5904\u7406\u9636\u6bb5<\/strong><br \/>\u66f4\u65b0\u8f93\u51fa\u6587\u4ef6\u5934\u90e8\u7684\u4e24\u4e2a\u5173\u952e\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li>\u6587\u4ef6\u603b\u957f\u5ea6\uff08\u7b2c 4~7 \u5b57\u8282\uff09\uff1b<\/li>\n<li>\u6570\u636e\u5757\u957f\u5ea6\uff08\u7b2c 40~43 \u5b57\u8282\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h4>2. \u6587\u4ef6\u5934\u66f4\u65b0\u673a\u5236\uff1a<code>MappedByteBuffer<\/code> \u7684\u4f18\u52bf<\/h4>\n<p>\u5728 Java \u4e2d\uff0c\u82e5\u4f7f\u7528\u4f20\u7edf <code>RandomAccessFile<\/code> + <code>seek()<\/code>\uff0c\u867d\u7136\u53ef\u4fee\u6539\u4efb\u610f\u4f4d\u7f6e\uff0c\u4f46\u4ecd\u4f1a\u4ea7\u751f\u4e00\u5b9a I\/O \u5ef6\u8fdf\u3002<\/p>\n<p>\u66f4\u4f18\u96c5\u7684\u65b9\u6848\u662f\u5229\u7528 <strong>\u5185\u5b58\u6620\u5c04\u6587\u4ef6 (Memory-Mapped File)<\/strong>\uff1a<\/p>\n<pre><code class=\"java\">MappedByteBuffer buffer = channel.map(MapMode.READ_WRITE, 0, 44);<\/code><\/pre>\n<p>\u8fd9\u6837\uff0c\u78c1\u76d8\u6587\u4ef6\u7684\u5934\u90e8\u88ab\u76f4\u63a5\u6620\u5c04\u5230\u5185\u5b58\u4e2d\u3002<br \/>\u5bf9\u7f13\u51b2\u533a\u7684\u5199\u5165\u4f1a\u81ea\u52a8\u540c\u6b65\u5230\u6587\u4ef6\u7cfb\u7edf\uff0c\u7701\u53bb\u4e86\u663e\u5f0f I\/O \u64cd\u4f5c\u3002<\/p>\n<p>\u5176\u6027\u80fd\u4f18\u52bf\u4e3b\u8981\u4f53\u73b0\u5728\uff1a<\/p>\n<ul>\n<li>\u65e0\u9700\u91cd\u65b0\u52a0\u8f7d\u6587\u4ef6\uff1b<\/li>\n<li>\u652f\u6301\u968f\u673a\u8bbf\u95ee\uff1b<\/li>\n<li>\u5bf9\u5927\u6587\u4ef6\u64cd\u4f5c\u65f6\u5ef6\u8fdf\u66f4\u4f4e\uff1b<\/li>\n<li>\u53ef\u5e76\u53d1\u6620\u5c04\u591a\u4e2a\u6587\u4ef6\uff08\u7ebf\u7a0b\u5b89\u5168\u9700\u63a7\u5236\uff09\u3002<\/li>\n<\/ul>\n<p>\u5728\u5b9e\u9645\u6d4b\u8bd5\u4e2d\uff0c\u66f4\u65b0 1GB WAV \u6587\u4ef6\u7684\u5934\u90e8\uff0c\u4ec5\u8017\u65f6 <strong>2~3 \u6beb\u79d2<\/strong>\u3002<\/p>\n<hr>\n<h4>3. \u6570\u636e\u62fc\u63a5\uff1a\u6d41\u5f0f\u9ad8\u6548\u5199\u5165<\/h4>\n<p>\u62fc\u63a5\u97f3\u9891\u6570\u636e\u7684\u6838\u5fc3\u601d\u60f3\u662f<strong>\u987a\u5e8f\u6d41\u5f0f\u5199\u5165<\/strong>\u3002<br \/>\u5373\u8bfb\u53d6\u8f93\u5165\u6d41\u7684\u5185\u5bb9\uff0c\u76f4\u63a5\u5199\u5165\u76ee\u6807\u8f93\u51fa\u6d41\uff0c\u800c\u4e0d\u8fdb\u884c\u7f13\u5b58\u6216\u89e3\u7801\u3002<\/p>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u5177\u5907\u4ee5\u4e0b\u4f18\u70b9\uff1a<\/p>\n<ul>\n<li><strong>\u96f6\u8f6c\u7801<\/strong>\uff1a\u4ec5\u590d\u5236\u5b57\u8282\u6570\u636e\uff1b<\/li>\n<li><strong>\u96f6\u7f13\u5b58<\/strong>\uff1a\u4e0d\u52a0\u8f7d\u8fdb\u5185\u5b58\uff1b<\/li>\n<li><strong>\u96f6\u7b49\u5f85<\/strong>\uff1a\u6570\u636e\u6d41\u5f0f\u4f20\u8f93\u5373\u523b\u5199\u5165\uff1b<\/li>\n<li><strong>\u4f4e\u529f\u8017<\/strong>\uff1aCPU \u51e0\u4e4e\u53ea\u53c2\u4e0e I\/O \u8c03\u5ea6\u3002<\/li>\n<\/ul>\n<p>\u5728\u591a\u7ebf\u7a0b\u62fc\u63a5\u573a\u666f\u4e2d\uff08\u5982\u8bed\u97f3 TTS \u5e76\u53d1\u5408\u6210\uff09\uff0c\u53ef\u901a\u8fc7 NIO \u5f02\u6b65\u901a\u9053\u8fdb\u4e00\u6b65\u63d0\u5347\u5e76\u884c\u6027\u80fd\u3002<\/p>\n<hr>\n<h3>\u56db\u3001\u6027\u80fd\u5206\u6790\u4e0e\u4f18\u5316\u7b56\u7565<\/h3>\n<p>\u4e3a\u4e86\u9a8c\u8bc1\u8be5\u65b9\u6848\u7684\u9ad8\u6548\u6027\uff0c\u6211\u4eec\u8fdb\u884c\u4e86\u591a\u7ec4\u6027\u80fd\u6d4b\u8bd5\u3002<\/p>\n<h4>1. \u6d4b\u8bd5\u73af\u5883<\/h4>\n<table>\n<thead>\n<tr>\n<th>\u9879\u76ee<\/th>\n<th>\u53c2\u6570<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>CPU<\/td>\n<td>Intel i7-12700H<\/td>\n<\/tr>\n<tr>\n<td>\u5185\u5b58<\/td>\n<td>16 GB DDR5<\/td>\n<\/tr>\n<tr>\n<td>\u7cfb\u7edf<\/td>\n<td>Windows 11<\/td>\n<\/tr>\n<tr>\n<td>JDK<\/td>\n<td>OpenJDK 17<\/td>\n<\/tr>\n<tr>\n<td>\u6587\u4ef6\u6570\u91cf<\/td>\n<td>10 \u4e2a WAV \u6587\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>\u6bcf\u4e2a\u5927\u5c0f<\/td>\n<td>5 MB<\/td>\n<\/tr>\n<tr>\n<td>\u91c7\u6837\u7387<\/td>\n<td>44100 Hz, \u5355\u58f0\u9053, 16 bit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr>\n<h4>2. FFmpeg \u5bf9\u6bd4\u6d4b\u8bd5<\/h4>\n<table>\n<thead>\n<tr>\n<th>\u6d4b\u8bd5\u9879<\/th>\n<th>FFmpeg \u547d\u4ee4\u65b9\u5f0f<\/th>\n<th>Java \u672c\u5730\u65b9\u6848<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u62fc\u63a5\u8017\u65f6<\/td>\n<td>3.8 \u79d2<\/td>\n<td>0.82 \u79d2<\/td>\n<\/tr>\n<tr>\n<td>CPU \u5360\u7528<\/td>\n<td>58%<\/td>\n<td>4.7%<\/td>\n<\/tr>\n<tr>\n<td>\u5185\u5b58\u5360\u7528<\/td>\n<td>180 MB<\/td>\n<td>32 MB<\/td>\n<\/tr>\n<tr>\n<td>I\/O \u8c03\u7528\u6b21\u6570<\/td>\n<td>&gt;4000<\/td>\n<td>&lt;400<\/td>\n<\/tr>\n<tr>\n<td>\u5916\u90e8\u4f9d\u8d56<\/td>\n<td>\u9700\u8981 FFmpeg \u53ef\u6267\u884c\u6587\u4ef6<\/td>\n<td>\u65e0\u4f9d\u8d56<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u7ed3\u679c\u8868\u660e\uff1a<\/p>\n<blockquote><p>\u5728\u76f8\u540c\u6570\u636e\u91cf\u4e0b\uff0cJava \u65b9\u6848\u6027\u80fd\u63d0\u5347\u7ea6 <strong>4.6 \u500d<\/strong>\uff0cCPU \u5360\u7528\u4e0b\u964d <strong>\u8d85\u8fc7 10 \u500d<\/strong>\u3002<\/p><\/blockquote>\n<hr>\n<h4>3. \u4e3b\u8981\u6027\u80fd\u4f18\u5316\u7b56\u7565<\/h4>\n<table>\n<thead>\n<tr>\n<th>\u4f18\u5316\u70b9<\/th>\n<th>\u6280\u672f\u624b\u6bb5<\/th>\n<th>\u6027\u80fd\u6536\u76ca<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u6587\u4ef6\u5934\u66f4\u65b0<\/td>\n<td>MappedByteBuffer<\/td>\n<td>\u51cf\u5c11 I\/O<\/td>\n<\/tr>\n<tr>\n<td>\u6570\u636e\u62fc\u63a5<\/td>\n<td>Buffered \u6d41\u5f0f\u590d\u5236<\/td>\n<td>\u964d\u4f4e\u5185\u5b58\u5360\u7528<\/td>\n<\/tr>\n<tr>\n<td>\u5f02\u5e38\u5904\u7406<\/td>\n<td>try-with-resources \u81ea\u52a8\u5173\u95ed\u6d41<\/td>\n<td>\u9632\u6b62\u53e5\u67c4\u6cc4\u9732<\/td>\n<\/tr>\n<tr>\n<td>\u6587\u4ef6\u6821\u9a8c<\/td>\n<td>\u63d0\u524d\u68c0\u6d4b\u91c7\u6837\u7387\u4e00\u81f4\u6027<\/td>\n<td>\u907f\u514d\u91cd\u5199\u65e0\u6548\u6587\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>\u8f93\u51fa\u6587\u4ef6\u521b\u5efa<\/td>\n<td>\u63d0\u524d\u5206\u914d\u76ee\u5f55\u4e0e\u6587\u4ef6<\/td>\n<td>\u907f\u514d I\/O \u963b\u585e<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u901a\u8fc7\u8fd9\u4e9b\u4f18\u5316\uff0c\u6574\u4f53\u6027\u80fd\u8fbe\u5230\u4e86\u63a5\u8fd1\u5e95\u5c42 C \u5b9e\u73b0\u7684\u6c34\u5e73\u3002<\/p>\n<hr>\n<h3>\u4e94\u3001\u5e94\u7528\u573a\u666f\u4e0e\u5de5\u7a0b\u5b9e\u8df5<\/h3>\n<h4>1. \u5728\u7ebf\u8bed\u97f3\u7cfb\u7edf<\/h4>\n<p>\u5728\u8bed\u97f3\u64ad\u62a5\u3001\u5bfc\u822a\u8bed\u97f3\u3001TTS \u5408\u6210\u7cfb\u7edf\u4e2d\uff0c\u7ecf\u5e38\u9700\u8981\u5c06\u591a\u6bb5\u77ed\u97f3\u9891\uff08\u5982\u6570\u5b57\u3001\u5355\u4f4d\u3001\u540d\u79f0\uff09\u62fc\u63a5\u4e3a\u5b8c\u6574\u53e5\u5b50\u3002<\/p>\n<p>\u672c\u65b9\u6848\u53ef\u76f4\u63a5\u7528\u4e8e\uff1a<\/p>\n<ul>\n<li>\u670d\u52a1\u7aef\u5b9e\u65f6\u62fc\u63a5\u8bed\u97f3\u5e76\u8fd4\u56de\uff1b<\/li>\n<li>Android \u79bb\u7ebf\u8bed\u97f3\u5408\u6210\uff1b<\/li>\n<li>\u667a\u80fd\u97f3\u7bb1\u6307\u4ee4\u8bed\u97f3\u8f93\u51fa\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>\u201c\u8bf7\u5728\u524d\u65b9 200 \u7c73 \u5de6\u8f6c\u201d\n=&gt;\n\u201c\u8bf7\u5728\u524d\u65b9\u201d + \u201c200\u201d + \u201c\u7c73\u201d + \u201c\u5de6\u8f6c\u201d<\/code><\/pre>\n<p>\u901a\u8fc7\u672c\u5730\u62fc\u63a5\u673a\u5236\uff0c\u53ef\u5728\u6beb\u79d2\u7ea7\u5b8c\u6210\u8f93\u51fa\u3002<\/p>\n<hr>\n<h4>2. \u64ad\u5ba2\u4e0e\u77ed\u89c6\u9891\u540e\u671f<\/h4>\n<p>\u7f16\u8f91\u5de5\u5177\u53ef\u5229\u7528\u6b64\u65b9\u6848\u8fdb\u884c\uff1a<\/p>\n<ul>\n<li>\u97f3\u4e50\u7247\u5934\/\u7247\u5c3e\u81ea\u52a8\u62fc\u5408\uff1b<\/li>\n<li>\u5e7f\u544a\u7247\u6bb5\u52a8\u6001\u63d2\u5165\uff1b<\/li>\n<li>\u6279\u91cf\u97f3\u9891\u6a21\u677f\u5408\u5e76\u3002<\/li>\n<\/ul>\n<p>\u7531\u4e8e\u65e0\u9700\u8f6c\u7801\uff0c\u62fc\u63a5\u8fc7\u7a0b\u51e0\u4e4e\u53ef\u89c6\u4e3a\u5373\u65f6\u5b8c\u6210\u3002<\/p>\n<hr>\n<h4>3. \u5d4c\u5165\u5f0f\u8bed\u97f3\u8bbe\u5907<\/h4>\n<p>\u5728\u8f66\u8f7d\u7ec8\u7aef\u3001IoT \u667a\u80fd\u786c\u4ef6\u4e2d\uff0cFFmpeg \u4f53\u79ef\u8fc7\u5927\u4e14\u529f\u8017\u9ad8\u3002<br \/>\u800c Java \u672c\u5730\u65b9\u6848\u53ef\u76f4\u63a5\u8fd0\u884c\u5728 JVM\uff08\u5982 Android ART \u6216 Dalvik\uff09\u4e0a\uff0c\u51e0\u4e4e\u4e0d\u589e\u52a0\u80fd\u8017\uff0c\u975e\u5e38\u9002\u5408\u4f4e\u529f\u8017\u8bbe\u5907\u3002<\/p>\n<hr>\n<h3>\u516d\u3001\u5f02\u5e38\u5904\u7406\u4e0e\u8fb9\u754c\u60c5\u51b5<\/h3>\n<p>\u5728\u5de5\u7a0b\u843d\u5730\u8fc7\u7a0b\u4e2d\uff0c\u8fd8\u9700\u8003\u8651\u82e5\u5e72\u8fb9\u754c\u95ee\u9898\uff1a<\/p>\n<h4>1. \u6587\u4ef6\u683c\u5f0f\u4e0d\u4e00\u81f4<\/h4>\n<p>\u82e5\u8f93\u5165\u6587\u4ef6\u7684\u91c7\u6837\u7387\u6216\u58f0\u9053\u4e0d\u540c\uff0c\u62fc\u63a5\u540e\u53ef\u80fd\u51fa\u73b0\u201c\u7834\u97f3\u201d\u6216\u201c\u64ad\u653e\u65f6\u957f\u5f02\u5e38\u201d\u3002<br \/>\u89e3\u51b3\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u9884\u89e3\u6790 WAV Header\uff1b<\/li>\n<li>\u68c0\u67e5\u5b57\u6bb5\u4e00\u81f4\u6027\uff1b<\/li>\n<li>\u4e0d\u4e00\u81f4\u65f6\u629b\u51fa\u5f02\u5e38\u6216\u81ea\u52a8\u91cd\u91c7\u6837\u3002<\/li>\n<\/ul>\n<h4>2. \u6587\u4ef6\u5934\u4e0d\u6807\u51c6<\/h4>\n<p>\u90e8\u5206\u5f55\u97f3\u8bbe\u5907\u751f\u6210\u7684 WAV \u6587\u4ef6\u53ef\u80fd\u5305\u542b \u201cLIST\u201d\u3001\u201cJUNK\u201d \u7b49\u6269\u5c55\u5757\u3002<br \/>\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6587\u4ef6\u5934\u957f\u5ea6\u53ef\u80fd &gt;44 \u5b57\u8282\uff0c\u9700\u52a8\u6001\u89e3\u6790 \u201cfmt \u201d \u4e0e \u201cdata\u201d \u5757\u4f4d\u7f6e\u3002<\/p>\n<h4>3. \u5185\u5b58\u6ea2\u51fa\u4e0e\u6587\u4ef6\u9501\u5b9a<\/h4>\n<p>\u901a\u8fc7 <code>try-with-resources<\/code> \u7ba1\u7406\u6240\u6709\u6587\u4ef6\u53e5\u67c4\uff1b<br \/>\u5728 Windows \u5e73\u53f0\u9700\u6ce8\u610f\u6587\u4ef6\u6d41\u672a\u5173\u95ed\u5bfc\u81f4\u6587\u4ef6\u9501\u5b9a\u3002<\/p>\n<h4>4. \u8d85\u5927\u6587\u4ef6 (&gt;2GB) \u5904\u7406<\/h4>\n<p>\u5e94\u91c7\u7528 <code>FileChannel<\/code> + <code>MappedByteBuffer<\/code> \u5206\u6bb5\u6620\u5c04\u5199\u5165\uff0c\u907f\u514d\u4e00\u6b21\u6027\u5185\u5b58\u6620\u5c04\u8d85\u9650\u3002<\/p>\n<hr>\n<h3>\u4e03\u3001\u672a\u6765\u6269\u5c55\u65b9\u5411<\/h3>\n<h4>1. \u591a\u683c\u5f0f\u652f\u6301<\/h4>\n<ul>\n<li>\u7ed3\u5408 <code>mp3spi<\/code> \u5e93\u53ef\u5b9e\u73b0 MP3 \u65e0\u8f6c\u7801\u62fc\u63a5\uff1b<\/li>\n<li>\u4f7f\u7528 <code>jflac<\/code> \u53ef\u6269\u5c55\u5230 FLAC\u3001APE \u7b49\u65e0\u635f\u683c\u5f0f\uff1b<\/li>\n<li>\u652f\u6301 WAV \u2192 AAC\u3001OGG \u6df7\u5408\u62fc\u63a5\uff08\u9700\u6269\u5c55\u5934\u90e8\u751f\u6210\u903b\u8f91\uff09\u3002<\/li>\n<\/ul>\n<h4>2. \u5b9e\u65f6\u62fc\u63a5\u4e0e\u6d41\u5f0f\u4f20\u8f93<\/h4>\n<p>\u5c06 <code>OutputStream<\/code> \u66ff\u6362\u4e3a <code>Socket<\/code> \u6216 <code>WebSocket<\/code>\uff0c<br \/>\u5373\u53ef\u5b9e\u73b0 \u201c\u8fb9\u62fc\u63a5\u8fb9\u63a8\u9001\u201d \u7684\u5b9e\u65f6\u97f3\u9891\u6d41\u8f93\u51fa\uff0c\u975e\u5e38\u9002\u5408\u4e91\u7aef TTS \u4e0e\u8bed\u97f3\u4f1a\u8bae\u573a\u666f\u3002<\/p>\n<h4>3. \u591a\u7ebf\u7a0b\u4e0e\u5e76\u884c\u4f18\u5316<\/h4>\n<p>\u5bf9\u4e8e\u5927\u89c4\u6a21\u62fc\u63a5\u4efb\u52a1\uff0c\u53ef\u6309\u6bb5\u843d\u62c6\u5206\u97f3\u9891\uff0c\u5e76\u4f7f\u7528 <code>CompletableFuture<\/code> \u5e76\u884c\u5904\u7406\uff0c<br \/>\u6700\u540e\u518d\u6309\u5e8f\u5408\u5e76\uff0c\u63d0\u5347\u541e\u5410\u6027\u80fd\u3002<\/p>\n<h4>4. GUI \u53ef\u89c6\u5316\u5de5\u5177<\/h4>\n<p>\u7ed3\u5408 JavaFX \u6216 Swing\uff0c\u53ef\u5feb\u901f\u6784\u5efa\u4e00\u4e2a\u97f3\u9891\u62fc\u63a5\u5668\u56fe\u5f62\u754c\u9762\uff0c\u5b9e\u73b0\u62d6\u62fd\u6587\u4ef6\u3001\u9884\u89c8\u6ce2\u5f62\u3001\u5b9e\u65f6\u5bfc\u51fa\u7b49\u529f\u80fd\u3002<\/p>\n<hr>\n<h3>\u516b\u3001\u603b\u7ed3\u4e0e\u601d\u8003<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u7279\u6027\u5bf9\u6bd4<\/th>\n<th>FFmpeg \u65b9\u6848<\/th>\n<th>Java \u7eaf\u672c\u5730\u65b9\u6848<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5916\u90e8\u4f9d\u8d56<\/td>\n<td>\u9700\u5b89\u88c5\u53ef\u6267\u884c\u6587\u4ef6<\/td>\n<td>\u65e0\u4f9d\u8d56<\/td>\n<\/tr>\n<tr>\n<td>\u5e73\u53f0\u517c\u5bb9\u6027<\/td>\n<td>\u4e0e\u7cfb\u7edf\u7ed1\u5b9a<\/td>\n<td>\u8de8\u5e73\u53f0\uff08JVM\uff09<\/td>\n<\/tr>\n<tr>\n<td>CPU \u5360\u7528<\/td>\n<td>\u9ad8\uff08&gt;50%\uff09<\/td>\n<td>\u4f4e\uff08&lt;5%\uff09<\/td>\n<\/tr>\n<tr>\n<td>\u5185\u5b58\u5360\u7528<\/td>\n<td>\u8f83\u9ad8<\/td>\n<td>\u6781\u4f4e<\/td>\n<\/tr>\n<tr>\n<td>\u5b9e\u65f6\u6027<\/td>\n<td>\u9700\u7b49\u5f85\u8f6c\u7801<\/td>\n<td>\u5373\u65f6\u8f93\u51fa<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u7528\u573a\u666f<\/td>\n<td>\u8f6c\u7801\u3001\u6df7\u97f3<\/td>\n<td>\u540c\u683c\u5f0f\u62fc\u63a5<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u914d\u96be\u5ea6<\/td>\n<td>\u53c2\u6570\u590d\u6742<\/td>\n<td>\u4ee3\u7801\u53ef\u63a7<\/td>\n<\/tr>\n<tr>\n<td>\u6269\u5c55\u6027<\/td>\n<td>\u53d7\u9650<\/td>\n<td>\u53ef\u81ea\u7531\u6269\u5c55<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u901a\u8fc7\u672c\u65b9\u6848\uff0c\u6211\u4eec\u5728 Java \u73af\u5883\u4e0b\u5b9e\u73b0\u4e86\u771f\u6b63\u610f\u4e49\u4e0a\u7684<strong>\u8f7b\u91cf\u7ea7\u97f3\u9891\u62fc\u63a5\u5f15\u64ce<\/strong>\uff0c<br \/>\u5b83\u4e0d\u4ec5\u6446\u8131\u4e86 FFmpeg \u7684\u9ad8\u8d1f\u8f7d\u4e0e\u4f9d\u8d56\uff0c\u8fd8\u5177\u5907\u5de5\u7a0b\u5316\u53ef\u7ef4\u62a4\u6027\u4e0e\u8de8\u5e73\u53f0\u517c\u5bb9\u6027\u3002<\/p>\n<hr>\n<h3>\u4e5d\u3001\u7ed3\u8bed<\/h3>\n<p>\u97f3\u9891\u5904\u7406\u4ece\u6765\u4e0d\u662f\u5fc5\u987b\u4f9d\u8d56\u5916\u90e8\u5de5\u5177\u3002<br \/>\u7406\u89e3\u6587\u4ef6\u7ed3\u6784\u3001\u5584\u7528\u5b57\u8282\u64cd\u4f5c\u4e0e\u5185\u5b58\u6620\u5c04\uff0c\u6211\u4eec\u5b8c\u5168\u53ef\u4ee5\u7528\u7eaf Java \u6253\u9020\u4e00\u4e2a<\/p>\n<blockquote><p><strong>\u96f6\u4f9d\u8d56\u3001\u4f4e\u529f\u8017\u3001\u9ad8\u6027\u80fd\u7684\u672c\u5730\u97f3\u9891\u5408\u5e76\u5668\u3002<\/strong><\/p><\/blockquote>\n<p>\u8fd9\u6b63\u662f\u5de5\u7a0b\u4f18\u96c5\u4e0e\u5e95\u5c42\u7406\u89e3\u76f8\u7ed3\u5408\u7684\u6700\u4f73\u4f53\u73b0\u3002<\/p>\n<h2>\u5b8c\u6574\u5b9e\u73b0\u4ee3\u7801<\/h2>\n<p>\ud83d\udce6 \u83b7\u53d6\u5b8c\u6574\u6e90\u7801<br \/>\uff08\u5305\u542b\u5b8c\u6574\u7c7b\u5b9a\u4e49\u3001\u5f02\u5e38\u5904\u7406\u4e0e\u65e5\u5fd7\u8f93\u51fa\u903b\u8f91\uff09<br \/>\u5230\u4e0b\u9762\u6587\u7ae0\u4e2d\u83b7\u53d6\uff0c\u4eb2\u6d4b\u5b8c\u6574\u4ee3\u7801\uff0c\u53ef\u8fd0\u884c\uff0c\u76ee\u524d\u6ca1\u6709\u53d1\u73b0bug\uff0c\u8fd0\u884c\u826f\u597d\u3002<\/p>\n<p>\ud83d\udc49 <a href=\"https:\/\/link.segmentfault.com\/?enc=FY%2FDZMfHa5zn%2FHFyEOlUQQ%3D%3D.syKtl3tvZi9rDJ%2BirOg%2FbidIhtRq86y3Veov2%2BOvFmI9YJH1M1fjpDwRk1K%2Fn3h1gSK63r6IRqXttU7871naQw%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">https:\/\/blog.csdn.net\/weixin_52908342\/article\/details\/154174970<\/a><br \/><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000047362647\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" title=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000047362645\">https:\/\/segmentfault.com\/a\/1190000047362645<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u9ad8\u6548\u5b9e\u73b0 WAV \u97f3\u9891\u62fc\u63a5\uff1a\u5f7b\u5e95\u6446\u8131 FFmpeg \u7684\u7eaf\u672c\u5730\u65b9\u6848 \u4e00\u3001\u80cc\u666f\uff1a\u4e3a\u4ec0\u4e48\u8981\u201c\u53bb FFmpe [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10021061","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10021061","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10021061"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10021061\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10021061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10021061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10021061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}