{"id":10021064,"date":"2025-11-05T11:26:44","date_gmt":"2025-11-05T03:26:44","guid":{"rendered":"https:\/\/itmax.cn\/?p=10021064"},"modified":"2025-11-05T11:26:44","modified_gmt":"2025-11-05T03:26:44","slug":"java-%e5%86%85%e5%ad%98%e7%ba%a7-wav-%e9%9f%b3%e9%a2%91%e5%8f%98%e9%80%9f%ef%bc%9a%e7%ba%bf%e6%80%a7%e6%8f%92%e5%80%bc%e6%b3%95%e5%ae%9e%e7%8e%b0%e3%80%90%e5%bd%bb%e5%ba%95%e6%91%86%e8%84%b1-ffmpeg","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10021064","title":{"rendered":"Java \u5185\u5b58\u7ea7 WAV \u97f3\u9891\u53d8\u901f\uff1a\u7ebf\u6027\u63d2\u503c\u6cd5\u5b9e\u73b0\u3010\u5f7b\u5e95\u6446\u8131 FFmpeg \u4f9d\u8d56\uff0c\u63d0\u5347\u6027\u80fd\u4e0e\u6548\u7387\u3011"},"content":{"rendered":"<h2>Java \u5185\u5b58\u7ea7 WAV \u97f3\u9891\u53d8\u901f\uff1a\u7ebf\u6027\u63d2\u503c\u6cd5\u5b9e\u73b0\u3010\u5f7b\u5e95\u6446\u8131 FFmpeg \u4f9d\u8d56\uff0c\u63d0\u5347\u6027\u80fd\u4e0e\u6548\u7387\u3011<\/h2>\n<p>\u5728\u97f3\u89c6\u9891\u5904\u7406\u7cfb\u7edf\u4e2d\uff0c<strong>\u97f3\u9891\u53d8\u901f\uff08Audio Speed Adjustment\uff09<\/strong> \u662f\u975e\u5e38\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u4f8b\u5982\u5728\u8bed\u97f3\u52a0\u901f\u64ad\u653e\u3001\u7d20\u6750\u65f6\u95f4\u5339\u914d\u3001AI \u8bed\u97f3\u6570\u636e\u589e\u5f3a\u7b49\u573a\u666f\u4e2d\u3002\u4f20\u7edf\u505a\u6cd5\u901a\u5e38\u4f9d\u8d56 <strong>FFmpeg<\/strong> \u7b49\u5916\u90e8\u5de5\u5177\u5b8c\u6210\uff0c\u4f46\u5728\u9ad8\u5e76\u53d1\u6216\u65e0\u5916\u90e8\u4f9d\u8d56\u73af\u5883\u4e0b\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5f80\u5f80\u9020\u6210 <strong>CPU \u8d1f\u8f7d\u9ad8\u3001I\/O \u9891\u7e41\u3001\u5904\u7406\u5ef6\u8fdf\u5927<\/strong> \u7b49\u95ee\u9898\u3002<\/p>\n<p>\u672c\u6587\u5c06\u4ecb\u7ecd\u4e00\u79cd\u57fa\u4e8e <strong>\u7eaf Java \u5185\u5b58\u8ba1\u7b97<\/strong> \u7684 WAV \u97f3\u9891\u53d8\u901f\u65b9\u6848\uff0c\u901a\u8fc7 <strong>\u7ebf\u6027\u63d2\u503c\uff08Linear Interpolation\uff09<\/strong> \u5b9e\u73b0\u91c7\u6837\u70b9\u91cd\u6392\uff0c\u4ece\u800c\u5728\u4e0d\u4f9d\u8d56\u4efb\u4f55\u5916\u90e8\u5e93\u7684\u60c5\u51b5\u4e0b\u5b8c\u6210\u9ad8\u6548\u7684\u97f3\u9891\u52a0\u901f\u6216\u51cf\u901f\u3002<\/p>\n<hr>\n<h3>\u5b8c\u6574\u5b9e\u73b0\u4ee3\u7801<\/h3>\n<p>\ud83d\udce6 \u5b8c\u6574\u5b9e\u73b0\u4ee3\u7801,\u4e4b\u524d\u5df2\u7ecf\u5728\u4e0b\u9762\u8fd9\u7bc7\u6587\u7ae0\u5185\u5199\u8fc7\u4e86\uff0c\u9700\u8981\u6211\u7684\u5b8c\u6574\u5c01\u88c5\u597d\u7684\u4ee3\u7801\uff0c\u53ef\u652f\u6301\u4e0b\u9762\u6587\u7ae0\u3002<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<blockquote><p><a href=\"https:\/\/link.segmentfault.com\/?enc=PJpLNtT91q2GBaQtNtulfA%3D%3D.R5R%2Bj4iNWbXkFgHn0%2F0LfN7vA23HBqiWOC4xutKNLfgxRljx6jHdVODpKv7sODzi1Iie%2FK2OlNI%2BR%2FCaMUWU7Q%3D%3D\" rel=\"nofollow noopener noreferrer\" target=\"_blank\">https:\/\/blog.csdn.net\/weixin_52908342\/article\/details\/154183903<\/a><\/p><\/blockquote>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000047369182\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" title=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"><\/p>\n<h3>\u4e00\u3001\u97f3\u9891\u53d8\u901f\u7684\u57fa\u672c\u539f\u7406<\/h3>\n<p>WAV \u6587\u4ef6\u662f\u4e00\u79cd\u5c01\u88c5\u4e86 <strong>PCM\uff08Pulse Code Modulation\uff0c\u8109\u51b2\u7f16\u7801\u8c03\u5236\uff09<\/strong> \u6570\u636e\u7684\u65e0\u538b\u7f29\u97f3\u9891\u683c\u5f0f\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u5b83\u5c31\u662f\u4e00\u7cfb\u5217\u8fde\u7eed\u7684\u6570\u503c\u6837\u672c\uff0c\u8bb0\u5f55\u4e86\u58f0\u6ce2\u5728\u65f6\u95f4\u8f74\u4e0a\u7684\u632f\u5e45\u53d8\u5316\u3002<\/p>\n<p>\u5f53\u6211\u4eec\u5bf9\u97f3\u9891\u8fdb\u884c\u53d8\u901f\u65f6\uff0c\u672c\u8d28\u4e0a\u662f\u5728\u91cd\u65b0\u5b9a\u4e49\u201c\u6bcf\u4e00\u79d2\u949f\u64ad\u653e\u591a\u5c11\u4e2a\u6837\u672c\u70b9\u201d\uff1a<\/p>\n<ul>\n<li><strong>\u52a0\u901f\u64ad\u653e<\/strong>\uff1a\u5355\u4f4d\u65f6\u95f4\u5185\u64ad\u653e\u66f4\u591a\u91c7\u6837\u70b9 \u2192 \u58f0\u97f3\u53d8\u5feb\u3001\u97f3\u9ad8\u5347\u9ad8\uff1b<\/li>\n<li><strong>\u51cf\u901f\u64ad\u653e<\/strong>\uff1a\u5355\u4f4d\u65f6\u95f4\u5185\u64ad\u653e\u66f4\u5c11\u91c7\u6837\u70b9 \u2192 \u58f0\u97f3\u53d8\u6162\u3001\u97f3\u9ad8\u964d\u4f4e\u3002<\/li>\n<\/ul>\n<p>\u5728\u672c\u6587\u4ecb\u7ecd\u7684\u65b9\u6848\u4e2d\uff0c\u6211\u4eec\u91c7\u7528 <strong>\u7ebf\u6027\u63d2\u503c\u7b97\u6cd5<\/strong> \u8fdb\u884c\u91cd\u91c7\u6837\uff08Resampling\uff09\uff1a<\/p>\n<ol>\n<li>\u6839\u636e\u76ee\u6807\u901f\u5ea6\uff0c\u8ba1\u7b97\u65b0\u7684\u76ee\u6807\u91c7\u6837\u6570\u91cf\uff1b<\/li>\n<li>\u901a\u8fc7\u6bd4\u4f8b\u6620\u5c04\uff0c\u786e\u5b9a\u65b0\u6837\u672c\u5728\u539f\u97f3\u9891\u4e2d\u7684\u5bf9\u5e94\u4f4d\u7f6e\uff1b<\/li>\n<li>\u5bf9\u76f8\u90bb\u91c7\u6837\u70b9\u4e4b\u95f4\u8fdb\u884c\u7ebf\u6027\u63d2\u503c\uff0c\u751f\u6210\u5e73\u6ed1\u8fc7\u6e21\u7684\u65b0\u6837\u672c\uff1b<\/li>\n<li>\u6700\u7ec8\u5f62\u6210\u65b0\u7684\u97f3\u9891\u6570\u636e\u6d41\u3002<\/li>\n<\/ol>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u65e0\u9700\u4efb\u4f55\u9891\u57df\u5206\u6790\u6216\u590d\u6742\u7684\u6570\u5b66\u53d8\u6362\uff0c\u4ec5\u51ed\u91c7\u6837\u6bd4\u4f8b\u5173\u7cfb\u5373\u53ef\u5b9e\u73b0\u9ad8\u8d28\u91cf\u53d8\u901f\u3002<\/p>\n<hr>\n<h3>\u4e8c\u3001\u5b9e\u73b0\u601d\u8def\u4e0e\u5173\u952e\u70b9<\/h3>\n<p>\u8fd9\u5957\u65b9\u6848\u5728\u5b9e\u73b0\u5c42\u9762\u4e0a\u4e3b\u8981\u4f9d\u8d56 <strong>Java \u7684 AudioSystem \u4e0e\u5b57\u8282\u6d41\u5904\u7406\u673a\u5236<\/strong>\uff0c\u6838\u5fc3\u601d\u8def\u662f\uff1a<\/p>\n<ol>\n<li><strong>\u4e00\u6b21\u6027\u8bfb\u53d6\u97f3\u9891\u5b57\u8282\u6d41<\/strong>\uff0c\u5b8c\u5168\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u5904\u7406\uff0c\u907f\u514d\u78c1\u76d8 I\/O\uff1b<\/li>\n<li>\u6839\u636e\u901f\u5ea6\u53c2\u6570\u8ba1\u7b97\u65b0\u7684\u91c7\u6837\u7d22\u5f15\uff1b<\/li>\n<li>\u5bf9\u4e0d\u540c\u4f4d\u6df1\uff088bit \/ 16bit\uff09\u4e0e\u4e0d\u540c\u58f0\u9053\uff08Mono \/ Stereo\uff09\u8fdb\u884c\u5206\u522b\u5904\u7406\uff1b<\/li>\n<li>\u4f7f\u7528\u7ebf\u6027\u63d2\u503c\u751f\u6210\u65b0\u7684\u97f3\u9891\u6837\u672c\u5e8f\u5217\uff1b<\/li>\n<li>\u91cd\u65b0\u5c01\u88c5\u4e3a WAV \u6587\u4ef6\u5e76\u8f93\u51fa\u3002<\/li>\n<\/ol>\n<p>\u8be5\u65b9\u6cd5\u4e0d\u9700\u8981\u5916\u90e8\u5de5\u5177\u8c03\u7528\uff0c\u4e5f\u4e0d\u4f9d\u8d56\u539f\u751f\u7cfb\u7edf\u6307\u4ee4\uff0c\u80fd\u591f\u76f4\u63a5\u5728\u4efb\u610f Java \u73af\u5883\u4e0b\u8fd0\u884c\uff0c\u975e\u5e38\u9002\u5408 <strong>\u670d\u52a1\u7aef\u6279\u91cf\u97f3\u9891\u5904\u7406<\/strong> \u6216 <strong>\u5d4c\u5165\u5f0f\u8bed\u97f3\u7cfb\u7edf<\/strong>\u3002<\/p>\n<hr>\n<h3>\u4e09\u3001\u65b9\u6848\u4f18\u52bf\u4e0e\u6027\u80fd\u8868\u73b0<\/h3>\n<h4>1. \u5185\u5b58\u7ea7\u5904\u7406\uff0c\u6548\u7387\u66f4\u9ad8<\/h4>\n<p>\u6240\u6709\u8fd0\u7b97\u5728 JVM \u5185\u5b58\u4e2d\u5b8c\u6210\uff0c\u4e0d\u6d89\u53ca\u78c1\u76d8\u4e2d\u95f4\u6587\u4ef6\uff0c\u4e5f\u65e0\u9700\u8c03\u7528\u5916\u90e8\u8fdb\u7a0b\u3002\u5bf9\u4e8e\u5b9e\u65f6\u5904\u7406\u6216\u6279\u91cf\u8f6c\u6362\u7684\u573a\u666f\uff0c\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u5ef6\u8fdf\u4e0e I\/O \u74f6\u9888\u3002<\/p>\n<h4>2. \u8ba1\u7b97\u590d\u6742\u5ea6\u4f4e<\/h4>\n<p>\u7b97\u6cd5\u91c7\u7528\u7ebf\u6027\u63d2\u503c\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n)\u3002<br \/>\u76f8\u6bd4\u9891\u57df\u7b97\u6cd5\uff08\u5982 FFT\uff09\u6216 FFmpeg \u5185\u90e8\u7684\u9ad8\u9636\u91cd\u91c7\u6837\uff0cCPU \u5360\u7528\u6781\u4f4e\u3002<\/p>\n<h4>3. \u901a\u7528\u6027\u5f3a<\/h4>\n<p>\u8be5\u65b9\u6848\u652f\u6301\uff1a<\/p>\n<ul>\n<li>PCM 8bit \/ 16bit \u7cbe\u5ea6\uff1b<\/li>\n<li>\u5355\u58f0\u9053\u4e0e\u7acb\u4f53\u58f0\uff1b<\/li>\n<li>\u53ef\u65e0\u7f1d\u5d4c\u5165\u5176\u4ed6\u97f3\u9891\u5904\u7406\u6a21\u5757\uff0c\u5982\u97f3\u91cf\u5f52\u4e00\u5316\u3001\u88c1\u526a\u3001\u6df7\u97f3\u7b49\u3002<\/li>\n<\/ul>\n<h4>4. \u5b8c\u5168\u72ec\u7acb\u4e8e\u5916\u90e8\u4f9d\u8d56<\/h4>\n<p>\u65e0\u9700\u5b89\u88c5 FFmpeg\uff0c\u65e0\u9700 JNI \u6216\u539f\u751f\u5e93\u7ed1\u5b9a\u3002<br \/>\u53ef\u76f4\u63a5\u96c6\u6210\u81f3\u4efb\u610f Java \u9879\u76ee\u3001Web \u670d\u52a1\u6216\u8de8\u5e73\u53f0\u97f3\u9891\u5de5\u5177\u4e2d\u3002<\/p>\n<hr>\n<h3>\u56db\u3001\u4f7f\u7528\u4e0e\u6269\u5c55\u5efa\u8bae<\/h3>\n<ol>\n<li><strong>\u97f3\u9ad8\u53d8\u5316\u95ee\u9898<\/strong><br \/>\u7531\u4e8e\u8be5\u65b9\u6cd5\u76f4\u63a5\u8c03\u6574\u91c7\u6837\u901f\u7387\uff0c\u4f1a\u5bfc\u81f4\u97f3\u9ad8\u968f\u901f\u5ea6\u53d8\u5316\u3002\u5982\u679c\u9700\u8981\u4fdd\u6301\u97f3\u9ad8\u4e0d\u53d8\uff0c\u53ef\u8fdb\u4e00\u6b65\u5f15\u5165 <strong>\u65f6\u95f4\u62c9\u4f38\uff08Time-Stretch\uff09\u7b97\u6cd5<\/strong>\uff0c\u5982 WSOLA\uff08Waveform Similarity Overlap-Add\uff09\u3002<\/li>\n<li><strong>\u5185\u5b58\u4f18\u5316\u5efa\u8bae<\/strong><br \/>\u5bf9\u4e8e\u6570\u767e MB \u4ee5\u4e0a\u7684\u97f3\u9891\u6587\u4ef6\uff0c\u5efa\u8bae\u91c7\u7528 <strong>\u5206\u5757\u8bfb\u53d6\u4e0e\u5904\u7406\u673a\u5236<\/strong>\uff0c\u4ee5\u907f\u514d\u5185\u5b58\u6ea2\u51fa\u3002<\/li>\n<li><strong>\u9002\u7528\u8303\u56f4<\/strong><br \/>\u672c\u7b97\u6cd5\u4ec5\u9002\u7528\u4e8e <strong>\u672a\u538b\u7f29\u7684 PCM WAV \u6587\u4ef6<\/strong>\u3002<br \/>\u5bf9\u4e8e MP3\u3001AAC \u7b49\u538b\u7f29\u683c\u5f0f\uff0c\u9700\u5148\u8fdb\u884c\u89e3\u7801\u518d\u5904\u7406\u3002<\/li>\n<\/ol>\n<hr>\n<h3>\u4e94\u3001\u603b\u7ed3<\/h3>\n<p>\u672c\u6587\u4ecb\u7ecd\u4e86\u4e00\u79cd <strong>\u57fa\u4e8e\u7ebf\u6027\u63d2\u503c\u7684 Java \u5185\u5b58\u7ea7 WAV \u97f3\u9891\u53d8\u901f\u65b9\u6848<\/strong>\u3002<br \/>\u5b83\u901a\u8fc7\u91cd\u65b0\u8ba1\u7b97\u91c7\u6837\u70b9\uff0c\u5b9e\u73b0\u97f3\u9891\u64ad\u653e\u901f\u5ea6\u7684\u52a0\u5feb\u6216\u51cf\u6162\uff0c\u5177\u6709\u4ee5\u4e0b\u663e\u8457\u7279\u70b9\uff1a<\/p>\n<ul>\n<li>\u65e0\u9700 FFmpeg \u6216\u5916\u90e8\u547d\u4ee4\uff1b<\/li>\n<li>\u8fd0\u7b97\u8f7b\u91cf\u3001CPU \u5360\u7528\u4f4e\uff1b<\/li>\n<li>\u6613\u4e8e\u96c6\u6210\u3001\u8de8\u5e73\u53f0\u7a33\u5b9a\uff1b<\/li>\n<li>\u53ef\u4f5c\u4e3a\u901a\u7528\u97f3\u9891\u5904\u7406\u6a21\u5757\u7684\u4e00\u90e8\u5206\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u9700\u8981 <strong>\u672c\u5730\u5316\u97f3\u9891\u5904\u7406\u3001\u9ad8\u6027\u80fd\u6279\u91cf\u53d8\u901f\u6216\u65e0\u5916\u90e8\u4f9d\u8d56\u90e8\u7f72<\/strong> \u7684\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u8fd9\u662f\u4e00\u79cd\u7b80\u5355\u3001\u4f18\u96c5\u4e14\u9ad8\u6548\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<hr>\n<p><img decoding=\"async\"   referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000047369183\" alt=\"\u7ebf\u6027\u63d2\u503c\u539f\u7406\u793a\u610f\u56fe\" title=\"\u7ebf\u6027\u63d2\u503c\u539f\u7406\u793a\u610f\u56fe\" loading=\"lazy\"><\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000047369180\">https:\/\/segmentfault.com\/a\/1190000047369180<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u5185\u5b58\u7ea7 WAV \u97f3\u9891\u53d8\u901f\uff1a\u7ebf\u6027\u63d2\u503c\u6cd5\u5b9e\u73b0\u3010\u5f7b\u5e95\u6446\u8131 FFmpeg \u4f9d\u8d56\uff0c\u63d0\u5347\u6027\u80fd\u4e0e\u6548\u7387\u3011 \u5728\u97f3\u89c6\u9891\u5904 [&hellip;]<\/p>\n","protected":false},"author":3,"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-10021064","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\/10021064","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\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10021064"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10021064\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10021064"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10021064"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10021064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}