{"id":1208,"date":"2022-08-18T15:27:36","date_gmt":"2022-08-18T07:27:36","guid":{"rendered":"http:\/\/blog.xtaa.cn\/?p=1208"},"modified":"2022-08-18T15:27:36","modified_gmt":"2022-08-18T07:27:36","slug":"%e6%b5%81%e5%aa%92%e4%bd%93%e8%a7%86%e9%a2%91%e5%9f%ba%e7%a1%80-mse-%e5%85%a5%e9%97%a8-ffmpeg-%e5%88%b6%e4%bd%9c%e8%a7%86%e9%a2%91%e9%a2%84%e8%a7%88%e7%bc%a9%e7%95%a5%e5%9b%be%e5%92%8c-fmp4","status":"publish","type":"post","link":"http:\/\/blog.xtaa.cn\/index.php\/2022\/08\/18\/%e6%b5%81%e5%aa%92%e4%bd%93%e8%a7%86%e9%a2%91%e5%9f%ba%e7%a1%80-mse-%e5%85%a5%e9%97%a8-ffmpeg-%e5%88%b6%e4%bd%9c%e8%a7%86%e9%a2%91%e9%a2%84%e8%a7%88%e7%bc%a9%e7%95%a5%e5%9b%be%e5%92%8c-fmp4\/","title":{"rendered":"\u6d41\u5a92\u4f53\u89c6\u9891\u57fa\u7840 MSE \u5165\u95e8 &#038; FFmpeg \u5236\u4f5c\u89c6\u9891\u9884\u89c8\u7f29\u7565\u56fe\u548c fmp4"},"content":{"rendered":"\n<p><\/p>\n\n\n\n<p>\u5982\u679c\u68c0\u67e5\u4e3b\u6d41\u89c6\u9891\u7f51\u7ad9\u7684\u89c6\u9891\uff0c\u5c31\u4f1a\u53d1\u73b0\u7f51\u7ad9\u7684 <code>video<\/code> \u5143\u7d20\u7684 <code>src<\/code> \u5c5e\u6027\u90fd\u662f <code>blob<\/code> \u5f00\u5934\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/9e3c57c7a9a2452787e6c10cf74bb1ff~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u89c6\u9891\u94fe\u63a5\u524d\u9762\u4f1a\u6709 <code>blob<\/code> \u524d\u7f00\uff1f\u8fd9\u662f\u56e0\u4e3a\u89c6\u9891\u7f51\u7ad9\u4f7f\u7528\u4e86\u8fd9\u7bc7\u6587\u7ae0\u8981\u8bb2\u7684 MSE \u6765\u64ad\u653e\u89c6\u9891\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Media Source Extensions<\/h2>\n\n\n\n<p>\u867d\u7136 <code>video<\/code> \u5f88\u5f3a\u5927\uff0c\u4f46\u662f\u8fd8\u6709\u5f88\u591a\u529f\u80fd <code>video<\/code> \u5e76\u4e0d\u652f\u6301\uff0c\u6bd4\u5982\u76f4\u64ad\uff0c\u5373\u65f6\u5207\u6362\u89c6\u9891\u6e05\u6670\u5ea6\uff0c\u52a8\u6001\u66f4\u65b0\u97f3\u9891\u8bed\u8a00\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n<p>MSE\uff08Media Source Extensions\uff09\u5c31\u6765\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\uff0c\u5b83\u662f W3C \u7684\u4e00\u79cd\u89c4\u8303\uff0c\u5982\u4eca\u5927\u90e8\u5206\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/ea9c3add197a46a6ab2efffb2338651c~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5b83\u4f7f\u7528 <code>video<\/code> \u6807\u7b7e\u52a0 JS \u6765\u5b9e\u73b0\u8fd9\u4e9b\u590d\u6742\u7684\u529f\u80fd\u3002\u5b83\u5c06 <code>video<\/code> \u7684 <code>src<\/code> \u8bbe\u7f6e\u4e3a <code>MediaSource<\/code> \u5bf9\u8c61\uff0c\u7136\u540e\u901a\u8fc7 HTTP \u8bf7\u6c42\u83b7\u53d6\u6570\u636e\uff0c\u7136\u540e\u4f20\u7ed9 <code>MeidaSource<\/code> \u4e2d\u7684 <code>SourceBuffer<\/code> \u6765\u5b9e\u73b0\u89c6\u9891\u64ad\u653e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/1abfc187e1ae43e2892b897149a957a9~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5982\u4f55\u5c06 <code>MediaSource<\/code> \u548c <code>video<\/code> \u5143\u7d20\u8fde\u63a5\u5462\uff1f\u8fd9\u5c31\u9700\u8981\u7528\u5230 <code>URL.createObjectURL<\/code> \u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a <code>DOMString<\/code> \u8868\u793a\u6307\u5b9a\u7684 <code>File<\/code> \u5bf9\u8c61\u6216 <code>Blob<\/code>\uff08\u4e8c\u8fdb\u5236\u5927\u5bf9\u8c61\uff09 \u5bf9\u8c61\u3002\u8fd9\u4e2a URL \u7684\u751f\u547d\u5468\u671f\u548c\u521b\u5efa\u5b83\u7684\u7a97\u53e3\u4e2d\u7684 <code>document<\/code> \u7ed1\u5b9a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const video = document.querySelector('video')\nconst mediaSource = new MediaSource()\n\nmediaSource.addEventListener('sourceopen', ({ target }) =&gt; {\n    URL.revokeObjectURL(video.src)\n    const mime = 'video\/webm; codecs=\"vorbis, vp8\"'\n    const sourceBuffer = target.addSourceBuffer(mime) \/\/ target \u5c31\u662f mediaSource\n    fetch('\/static\/media\/flower.webm')\n        .then(response =&gt; response.arrayBuffer())\n        .then(arrayBuffer =&gt; {\n            sourceBuffer.addEventListener('updateend', () =&gt; {\n                if (!sourceBuffer.updating &amp;&amp; target.readyState === 'open') {\n                    target.endOfStream()\n                    video.play()\n                }\n            })\n            sourceBuffer.appendBuffer(arrayBuffer)\n        })\n})\n\nvideo.src = URL.createObjectURL(mediaSource)\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p><code>addSourceBuffer<\/code> \u65b9\u6cd5\u4f1a\u6839\u636e\u7ed9\u5b9a\u7684 MIME \u7c7b\u578b\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 <code>SourceBuffer<\/code> \u5bf9\u8c61\uff0c\u7136\u540e\u4f1a\u5c06\u5b83\u8ffd\u52a0\u5230 <code>MediaSource<\/code> \u7684 <code>SourceBuffers<\/code> \u5217\u8868\u4e2d\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u9700\u8981\u4f20\u5165\u76f8\u5173\u5177\u4f53\u7684\u7f16\u89e3\u7801\u5668\uff08codecs\uff09\u5b57\u7b26\u4e32\uff0c\u8fd9\u91cc\u7b2c\u4e00\u4e2a\u662f\u97f3\u9891\uff08vorbis\uff09\uff0c\u7b2c\u4e8c\u4e2a\u662f\u89c6\u9891\uff08vp8\uff09\uff0c\u4e24\u4e2a\u4f4d\u7f6e\u4e5f\u53ef\u4ee5\u4e92\u6362\uff0c\u77e5\u9053\u4e86\u5177\u4f53\u7684\u7f16\u89e3\u7801\u5668\u6d4f\u89c8\u5668\u5c31\u65e0\u9700\u4e0b\u8f7d\u5177\u4f53\u6570\u636e\u5c31\u77e5\u9053\u5f53\u524d\u7c7b\u578b\u662f\u5426\u652f\u6301\uff0c\u5982\u679c\u4e0d\u652f\u6301\u8be5\u65b9\u6cd5\u5c31\u4f1a\u629b\u51fa <code>NotSupportedError<\/code> \u9519\u8bef\u3002\u66f4\u591a\u5173\u4e8e\u5a92\u4f53\u7c7b\u578b MIME \u7f16\u89e3\u7801\u5668\u53ef\u4ee5\u53c2\u8003 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc4281\" target=\"_blank\" rel=\"noreferrer noopener\">RFC 4281<\/a>\u3002<\/p>\n\n\n\n<p>\u8fd9\u91cc\u8fd8\u5728\u4e00\u5f00\u59cb\u5c31\u8c03\u7528\u4e86 <code>revokeObjectURL<\/code>\u3002\u8fd9\u5e76\u4e0d\u4f1a\u7834\u574f\u4efb\u4f55\u5bf9\u8c61\uff0c\u53ef\u4ee5\u5728 <code>MediaSource<\/code> \u8fde\u63a5\u5230 <code>video<\/code> \u540e\u968f\u65f6\u8c03\u7528\u3002 \u5b83\u5141\u8bb8\u6d4f\u89c8\u5668\u5728\u9002\u5f53\u7684\u65f6\u5019\u8fdb\u884c\u5783\u573e\u56de\u6536\u3002<\/p>\n\n\n\n<p>\u89c6\u9891\u5e76\u6ca1\u6709\u76f4\u63a5\u63a8\u9001\u5230 <code>MediaSource<\/code> \u4e2d\uff0c\u800c\u662f <code>SourceBuffer<\/code>\uff0c\u4e00\u4e2a <code>MeidaSource<\/code> \u4e2d\u6709\u4e00\u4e2a\u6216\u591a\u4e2a <code>SourceBuffer<\/code>\u3002\u6bcf\u4e2a\u90fd\u4e0e\u4e00\u79cd\u5185\u5bb9\u7c7b\u578b\u5173\u8054\uff0c\u53ef\u80fd\u662f\u89c6\u9891\u3001\u97f3\u9891\u3001\u89c6\u9891\u548c\u97f3\u9891\u7b49\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/f5768f8c4a604f67ae2b80454dae95da~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u89c6\u9891\u683c\u5f0f<\/h2>\n\n\n\n<p>HTML5 \u6807\u51c6\u6307\u5b9a\u65f6\uff0c\u60f3\u6307\u5b9a\u4e00\u79cd\u89c6\u9891\u683c\u5f0f\u4f5c\u4e3a\u6807\u51c6\u7684\u4e00\u90e8\u5206\uff0c\u6240\u6709\u6d4f\u89c8\u5668\u90fd\u5fc5\u987b\u5b9e\u73b0\u3002\u4f46\u662f\u5bf9\u4e8e <code>H.264<\/code> \u89c6\u9891\u7f16\u7801\u5404\u4e2a\u5382\u5546\u4ea7\u751f\u7684\u4e89\u8bba\uff0c\u4e3b\u8981\u662f <code>H.264<\/code> \u975e\u5e38\u5f3a\u5927\uff08\u9ad8\u753b\u8d28\u3001\u9ad8\u538b\u7f29\u6bd4\u3001\u6210\u719f\u7684\u7f16\u89e3\u7801\u5668&#8230;\uff09\uff0c\u4f46\u662f\u5b83\u4e5f\u8981\u9ad8\u6602\u7684\u6388\u6743\u8d39\u3002Mozilla \u8fd9\u7c7b\u514d\u8d39\u6d4f\u89c8\u5668\uff0c\u5e76\u6ca1\u6709\u4ece\u5176\u5f00\u53d1\u7684\u6d4f\u89c8\u5668\u4e0a\u83b7\u5f97\u76f4\u63a5\u6536\u5165\uff0c\u4f46\u662f\u8ba9 <code>H.264<\/code> \u52a0\u5165\u6807\u51c6\uff0c\u5b83\u5c31\u8981\u652f\u4ed8\u76f8\u5e94\u7684\u6388\u6743\u8d39\uff0c\u6240\u6709\u8ba4\u4e3a\u662f\u4e0d\u53ef\u63a5\u53d7\u7684\u3002\u4e8e\u662f\u540e\u6765\u653e\u5f03\u4e86\u89c6\u9891\u683c\u5f0f\u6307\u5b9a\u7684\u7edf\u4e00\uff0c\u6d4f\u89c8\u5668\u5382\u5546\u53ef\u4ee5\u81ea\u7531\u9009\u62e9\u652f\u6301\u7684\u683c\u5f0f\u3002<\/p>\n\n\n\n<p>\u4e0d\u8fc7\u73b0\u5728\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301 <code>H.264<\/code> \u7f16\u7801\u683c\u5f0f\u7684\u89c6\u9891\uff0c\u6240\u6709\u9009\u62e9\u89c6\u9891\u7f16\u7801\u65f6\u4f18\u5148\u9009\u62e9 <code>H.264<\/code> \u7f16\u7801\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MediaSource API<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><code>MediaSource<\/code> \u5c5e\u6027<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5c5e\u6027<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>sourceBuffers<\/td><td>\u8fd4\u56de\u5305\u542b <code>MediaSource<\/code> \u6240\u6709 <code>SourceBuffer<\/code> \u7684 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FSourceBufferList\" target=\"_blank\" rel=\"noreferrer noopener\">SourceBufferList<\/a> \u5bf9\u8c61<\/td><\/tr><tr><td>activeSourceBuffers<\/td><td>\u4e0a\u4e2a\u5c5e\u6027\u7684\u5b50\u96c6\uff0c\u8fd4\u56de\u5f53\u524d\u9009\u62e9\u7684\u89c6\u9891\u8f68\u9053\uff0c\u542f\u7528\u7684\u97f3\u9891\u89c4\u5b9a\u548c\u663e\u793a\u6216\u9690\u85cf\u7684\u6587\u672c\u8f68\u9053<\/td><\/tr><tr><td>duration<\/td><td>\u83b7\u53d6\u6216\u8005\u8bbe\u7f6e\u5f53\u524d\u5a92\u4f53\u5c55\u793a\u7684\u65f6\u957f\uff0c\u8d1f\u6570\u6216 <code>NaN<\/code> \u65f6\u629b\u51fa <code>InvalidAccessError<\/code>\uff0c<br><code>readyState<\/code> \u4e0d\u4e3a <code>open<\/code> \u6216 <code>SourceBuffer.updating<\/code> \u5c5e\u6027\u4e3a <code>true<\/code> \u65f6\u629b\u51fa <code>InvalidStateError<\/code><\/td><\/tr><tr><td>readyState<\/td><td>\u8868\u793a <code>MediaSource<\/code> \u7684\u5f53\u524d\u72b6\u6001<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><code>readyState<\/code> \u6709\u4ee5\u4e0b\u503c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>closed<\/code> \u672a\u9644\u7740\u5230\u4e00\u4e2a <code>media<\/code> \u5143\u7d20\u4e0a<\/li><li><code>open<\/code> \u5df2\u9644\u7740\u5230\u4e00\u4e2a <code>media<\/code> \u5143\u7d20\u5e76\u51c6\u5907\u597d\u63a5\u6536 <code>SourceBuffer<\/code> \u5bf9\u8c61<\/li><li><code>ended<\/code> \u5df2\u9644\u7740\u5230\u4e00\u4e2a <code>media<\/code> \u5143\u7d20\uff0c\u4f46\u6d41\u5df2\u88ab <code>MediaSource.endOfStream()<\/code> \u7ed3\u675f<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><code>MediaSource<\/code> \u65b9\u6cd5<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u65b9\u6cd5<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>addSourceBuffer(mime)<\/td><td>\u6839\u636e\u7ed9\u5b9a MIME \u7c7b\u578b\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 SourceBuffer \u5bf9\u8c61\uff0c\u5c06\u5b83\u8ffd\u52a0\u5230 MediaSource \u7684 SourceBuffers \u5217\u8868\u4e2d<\/td><\/tr><tr><td>removeSourceBuffer(sourceBuffer)<\/td><td>\u79fb\u9664 MediaSource \u4e2d\u6307\u5b9a\u7684 SourceBuffer\u3002\u5982\u679c\u4e0d\u5b58\u5728\u5219\u629b\u51fa NotFoundError \u5f02\u5e38<\/td><\/tr><tr><td>endOfStream(endOfStreamError)<\/td><td>\u5411 MediaSource \u53d1\u9001\u7ed3\u675f\u4fe1\u53f7\uff0c\u63a5\u6536\u4e00\u4e2a DOMString \u53c2\u6570\uff0c\u8868\u793a\u5230\u8fbe\u6d41\u672b\u5c3e\u65f6\u5c06\u629b\u51fa\u7684\u9519\u8bef<\/td><\/tr><tr><td>setLiveSeekableRange(start, end)<\/td><td>\u8bbe\u7f6e\u7528\u6237\u53ef\u4ee5\u8df3\u8dc3\u7684\u89c6\u9891\u8303\u56f4\uff0c\u53c2\u6570\u662f\u4ee5\u79d2\u5355\u4f4d\u7684 <code>Double<\/code> \u7c7b\u578b\uff0c\u8d1f\u6570\u7b49\u975e\u6cd5\u53c2\u6570\u4f1a\u629b\u51fa\u5f02\u5e38<\/td><\/tr><tr><td>clearLiveSeekableRange<\/td><td>\u6e05\u9664\u4e0a\u6b21\u8bbe\u7f6e\u7684 <code>LiveSeekableRange<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u5176\u4e2d <code>addSourceBuffer<\/code> \u53ef\u80fd\u4f1a\u629b\u51fa\u4e00\u4e0b\u9519\u8bef\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9519\u8bef<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>InvalidAccessError<\/td><td>\u63d0\u4ea4\u7684 mimeType \u662f\u4e00\u4e2a\u7a7a\u5b57\u7b26\u4e32<\/td><\/tr><tr><td>InvalidStateError<\/td><td>MediaSource.readyState \u7684\u503c\u4e0d\u7b49\u4e8e open<\/td><\/tr><tr><td>NotSupportedError<\/td><td>\u5f53\u524d\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\u7684 mimeType<\/td><\/tr><tr><td>QuotaExceededError<\/td><td>\u6d4f\u89c8\u5668\u4e0d\u80fd\u518d\u5904\u7406 SourceBuffer \u5bf9\u8c61<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><code>endOfStream<\/code> \u7684\u53c2\u6570\u53ef\u80fd\u662f\u5982\u4e0b\u4e24\u79cd\u5b57\u7b26\u4e32\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>network<\/code> \u7ec8\u6b62\u64ad\u653e\u5e76\u53d1\u51fa\u7f51\u7edc\u9519\u8bef\u4fe1\u53f7<\/li><li><code>decode<\/code> \u7ec8\u6b62\u64ad\u653e\u5e76\u53d1\u51fa\u89e3\u7801\u9519\u8bef\u4fe1\u53f7<\/li><\/ul>\n\n\n\n<p>\u5f53 <code>MediaSource.readyState<\/code> \u4e0d\u7b49\u4e8e <code>open<\/code> \u6216\u6709 <code>SourceBuffer.updating<\/code> \u7b49\u4e8e <code>true<\/code>\uff0c\u8c03\u7528 <code>endOfStream<\/code> \u4f1a\u629b\u51fa <code>InvalidStateError<\/code> \u5f02\u5e38\u3002<\/p>\n\n\n\n<p>\u5b83\u8fd8\u6709\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9759\u6001\u65b9\u6cd5<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>isTypeSupported(mime)<\/td><td>\u662f\u5426\u652f\u6301\u6307\u5b9a\u7684 mime \u7c7b\u578b\uff0c\u8fd4\u56de <code>true<\/code> \u8868\u793a\u53ef\u80fd\u652f\u6301\u5e76\u4e0d\u80fd\u4fdd\u8bc1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><code>MediaSource<\/code> \u4e8b\u4ef6<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u9519\u8bef<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>sourceopen<\/td><td><code>readyState<\/code> \u4ece <code>closed<\/code> \u6216 <code>ended<\/code> \u5230 <code>open<\/code><\/td><\/tr><tr><td>sourceended<\/td><td><code>readyState<\/code> \u4ece <code>open<\/code> \u5230 <code>ended<\/code><\/td><\/tr><tr><td>sourceclose<\/td><td><code>readyState<\/code> \u4ece <code>open<\/code> \u6216 <code>ended<\/code> \u5230 <code>closed<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">SourceBuffer API<\/h2>\n\n\n\n<p><code>SourceBuffer<\/code> \u901a\u8fc7 <code>MediaSource<\/code> \u5c06\u4e00\u5757\u5757\u5a92\u4f53\u6570\u636e\u4f20\u9012\u7ed9 <code>meida<\/code> \u5143\u7d20\u64ad\u653e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><code>SourceBuffer<\/code> \u5c5e\u6027<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5c5e\u6027<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>mode<\/td><td>\u63a7\u5236\u5904\u7406\u5a92\u4f53\u7247\u6bb5\u5e8f\u5217\uff0c<code>segments<\/code> \u7247\u6bb5\u65f6\u95f4\u6233\u51b3\u5b9a\u64ad\u653e\u987a\u5e8f\uff0c<code>sequence<\/code> \u6dfb\u52a0\u987a\u5e8f\u51b3\u5b9a\u64ad\u653e\u987a\u5e8f\uff0c<br>\u5728 <code>MediaSource.addSourceBuffer()<\/code> \u4e2d\u8bbe\u7f6e\u521d\u59cb\u503c\uff0c\u5982\u679c\u5a92\u4f53\u7247\u6bb5\u6709\u65f6\u95f4\u6233\u8bbe\u7f6e\u4e3a <code>segments<\/code>\uff0c\u5426\u5219 <code>sequence<\/code>\u3002<br>\u81ea\u5df1\u8bbe\u7f6e\u65f6\u53ea\u80fd\u4ece <code>segments<\/code> \u8bbe\u7f6e\u4e3a <code>sequence<\/code>\uff0c\u4e0d\u80fd\u53cd\u8fc7\u6765\u3002<\/td><\/tr><tr><td>updating<\/td><td>\u662f\u5426\u6b63\u5728\u66f4\u65b0\uff0c\u6bd4\u5982 <code>appendBuffer()<\/code> \u6216 <code>remove()<\/code> \u65b9\u6cd5\u8fd8\u5728\u5904\u7406\u4e2d<\/td><\/tr><tr><td>buffered<\/td><td>\u8fd4\u56de\u5f53\u524d\u7f13\u51b2\u7684 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FTimeRanges\" target=\"_blank\" rel=\"noreferrer noopener\">TimeRanges<\/a> \u5bf9\u8c61<\/td><\/tr><tr><td>timestampOffset<\/td><td>\u63a7\u5236\u5a92\u4f53\u7247\u6bb5\u7684\u65f6\u95f4\u6233\u504f\u79fb\u91cf\uff0c\u9ed8\u8ba4\u662f 0<\/td><\/tr><tr><td>audioTracks<\/td><td>\u8fd4\u56de\u5f53\u524d\u5305\u542b\u7684 AudioTrack \u7684 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FAudioTrackList\" target=\"_blank\" rel=\"noreferrer noopener\">AudioTrackList<\/a> \u5bf9\u8c61<\/td><\/tr><tr><td>videoTracks<\/td><td>\u8fd4\u56de\u5f53\u524d\u5305\u542b\u7684 VideoTrack \u7684 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FVideoTrackList\" target=\"_blank\" rel=\"noreferrer noopener\">VideoTrackList<\/a> \u5bf9\u8c61<\/td><\/tr><tr><td>textTracks<\/td><td>\u8fd4\u56de\u5f53\u524d\u5305\u542b\u7684 TextTrack \u7684 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fdeveloper.mozilla.org%2Fen-US%2Fdocs%2FWeb%2FAPI%2FTextTrackList\" target=\"_blank\" rel=\"noreferrer noopener\">TextTrackList<\/a> \u5bf9\u8c61<\/td><\/tr><tr><td>appendWindowStart<\/td><td>\u8bbe\u7f6e\u6216\u83b7\u53d6 append window \u7684\u5f00\u59cb\u65f6\u95f4\u6233<\/td><\/tr><tr><td>appendWindowEnd<\/td><td>\u8bbe\u7f6e\u6216\u83b7\u53d6 append window \u7684\u7ed3\u675f\u65f6\u95f4\u6233<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>append window \u662f\u4e00\u4e2a\u65f6\u95f4\u6233\u8303\u56f4\u6765\u8fc7\u6ee4 <code>append<\/code> \u7684\u7f16\u7801\u5e27\u3002\u5728\u8303\u56f4\u5185\u7684\u7f16\u7801\u7f16\u7801\u5e27\u5141\u8bb8\u6dfb\u52a0\u5230 <code>SourceBuffer<\/code>\uff0c\u4e4b\u5916\u7684\u4f1a\u88ab\u8fc7\u6ee4\u3002<\/p><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\"><code>SourceBuffer<\/code> \u65b9\u6cd5<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u65b9\u6cd5<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>appendBuffer(source)<\/td><td>\u6dfb\u52a0\u5a92\u4f53\u6570\u636e\u7247\u6bb5\uff08<code>ArrayBuffer<\/code> \u6216 <code>ArrayBufferView<\/code>\uff09\u5230 <code>SourceBuffer<\/code><\/td><\/tr><tr><td>abort<\/td><td>\u4e2d\u65ad\u5f53\u524d\u7247\u6bb5\uff0c\u91cd\u7f6e\u6bb5\u89e3\u6790\u5668\uff0c\u53ef\u4ee5\u8ba9 <code>updating<\/code> \u53d8\u6210 <code>false<\/code><\/td><\/tr><tr><td>remove(start, end)<\/td><td>\u79fb\u9664\u6307\u5b9a\u8303\u56f4\u7684\u5a92\u4f53\u6570\u636e<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><code>SourceBuffer<\/code> \u4e8b\u4ef6<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u65b9\u6cd5<\/th><th>\u63cf\u8ff0<\/th><\/tr><\/thead><tbody><tr><td>updatestart<\/td><td><code>updating<\/code> \u4ece <code>false<\/code> \u53d8\u4e3a <code>true<\/code> \u65f6<\/td><\/tr><tr><td>update<\/td><td><code>append<\/code> \u6216 <code>remove<\/code> \u5df2\u7ecf\u6210\u529f\u5b8c\u6210\uff0c<code>updating<\/code> \u4ece <code>true<\/code> \u53d8\u4e3a <code>false<\/code><\/td><\/tr><tr><td>updateend<\/td><td><code>append<\/code> \u6216 <code>remove<\/code> \u5df2\u7ecf\u7ed3\u675f\uff0c\u5728 <code>update<\/code> \u4e4b\u540e\u89e6\u53d1<\/td><\/tr><tr><td>error<\/td><td><code>append<\/code> \u65f6\u53d1\u751f\u4e86\u9519\u8bef\uff0c<code>updating<\/code> \u4ece <code>true<\/code> \u53d8\u4e3a <code>false<\/code><\/td><\/tr><tr><td>abort<\/td><td><code>append<\/code> \u6216 <code>remove<\/code> \u88ab <code>abort()<\/code> \u65b9\u6cd5\u4e2d\u65ad\uff0c<code>updating<\/code> \u4ece <code>true<\/code> \u53d8\u4e3a <code>false<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li><strong>\u51e0\u4e4e\u6240\u6709 <code>MediaSource<\/code> \u65b9\u6cd5\u8c03\u7528\u6216\u8bbe\u7f6e\u5c5e\u6027\uff0c\u5728 <code>MediaSource.readyState<\/code> \u4e0d\u662f <code>open<\/code> \u65f6\u4f1a\u629b\u51fa <code>InvalidStateError<\/code> \u9519\u8bef\uff0c\u5e94\u8be5\u5728\u8c03\u7528\u65b9\u6cd5\u6216\u8bbe\u7f6e\u5c5e\u6027\u524d\u67e5\u770b\u5f53\u524d\u72b6\u6001\uff0c\u5373\u4f7f\u662f\u5728\u4e8b\u4ef6\u56de\u8c03\u4e2d\uff0c\u56e0\u4e3a\u53ef\u80fd\u5728\u56de\u8c03\u6267\u884c\u4e4b\u524d\u6539\u53d8\u4e86\u72b6\u6001\u3002\u6b64\u5916 <code>endOfStream<\/code> \u65b9\u6cd5\u8fd8\u4f1a\u56e0\u4e3a <code>SourceBuffer<\/code> \u7684 <code>updating<\/code> \u4e3a <code>true<\/code> \u65f6\u4e5f\u629b\u51fa\u8be5\u5f02\u5e38<\/strong><\/li><li><strong>\u5728\u8c03\u7528 <code>SourceBuffer<\/code> \u65b9\u6cd5\u6216\u8bbe\u7f6e\u5c5e\u6027\u65f6\uff0c\u5e94\u8be5\u68c0\u67e5 <code>SourceBuffer<\/code> \u662f\u5426\u4e3a <code>false<\/code><\/strong><\/li><li><strong>\u5f53 <code>MediaSource.readyState<\/code> \u7684\u503c\u662f <code>ended<\/code> \u65f6\uff0c\u8c03\u7528 <code>appendBuffer()<\/code> \u548c <code>remove()<\/code> \u6216\u8bbe\u7f6e <code>mode<\/code> \u548c <code>timestampOffset<\/code> \u65f6\uff0c\u5c06\u4f1a\u8ba9 <code>readyState<\/code> \u53d8\u4e3a <code>open<\/code>\uff0c\u5e76\u89e6\u53d1 <code>sourceopen<\/code> \u4e8b\u4ef6\uff0c\u6240\u6709\u5e94\u8be5\u8981\u6709\u5904\u7406\u591a\u4e2a <code>sourceopen<\/code> \u4e8b\u4ef6\u51c6\u5907<\/strong><\/li><\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Initialization Segment<\/h2>\n\n\n\n<p>\u5982\u679c\u968f\u4fbf\u627e\u4e00\u4e2a <code>mp4<\/code> \u6587\u4ef6\uff0c\u4f7f\u7528\u4e0a\u9762\u90a3\u4e2a\u4f8b\u5b50\u64ad\u653e\uff0c\u5c31\u4f1a\u53d1\u73b0\u64ad\u653e\u4e0d\u4e86\u3002\u8fd9\u662f\u56e0\u4e3a <code>SourceBuffer<\/code> \u63a5\u6536\u4e24\u79cd\u7c7b\u578b\u7684\u6570\u636e\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><code>Initialization Segment<\/code> \u89c6\u9891\u7684\u521d\u59cb\u7247\u6bb5\uff0c\u5176\u4e2d\u5305\u542b\u5a92\u4f53\u7247\u6bb5\u5e8f\u5217\u8fdb\u884c\u89e3\u7801\u6240\u9700\u7684\u6240\u6709\u521d\u59cb\u5316\u4fe1\u606f\u3002<\/li><li><code>Media Segment<\/code> \u5305\u542b\u4e00\u90e8\u5206\u5a92\u4f53\u65f6\u95f4\u8f74\u7684\u6253\u5305\u548c\u5e26\u65f6\u95f4\u6233\u7684\u5a92\u4f53\u6570\u636e\u3002<\/li><\/ol>\n\n\n\n<p>MSE \u9700\u8981\u4f7f\u7528 <code>fmp4 (fragmented MP4)<\/code> \u683c\u5f0f\uff0c<code>MP4<\/code> \u6587\u4ef6\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u683c\u5f0f\u5176\u4e2d\u5305\u542b <code>Boxes (\u6216\u53eb Atoms)<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528 <a href=\"https:\/\/link.juejin.cn?target=http%3A%2F%2Fmp4parser.com%2F\" target=\"_blank\" rel=\"noreferrer noopener\">\u8fd9\u4e2a\u7f51\u7ad9<\/a> \u67e5\u770b <code>Mp4<\/code> \u6587\u4ef6\u4fe1\u606f\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/c6e94f5f3d8344d99580c3cb904b63f8~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u8fd9\u662f\u4e00\u4e2a\u666e\u901a\u7684 MP4 \u6587\u4ef6\uff0c\u53ef\u4ee5\u770b\u5230\u5b83\u6709\u4e00\u4e2a\u5f88\u5927\u7684 <code>mdat<\/code> \uff08\u7535\u5f71\u6570\u636e\uff09<code>box<\/code>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/f14c29127f254ad29e871b5436a5efc7~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u8fd9\u662f fragmented MP4 \u7684\u622a\u56fe\uff0cISO BMFF \u521d\u59cb\u5316\u6bb5\u5b9a\u4e49\u4e3a\u5355\u4e2a\u6587\u4ef6\u7c7b\u578b\u6846\uff08File Type Box <code>ftyp<\/code>\uff09\u540e\u8ddf\u5355\u4e2a\u7535\u5f71\u6807\u9898\u6846\uff08Movie Header Box <code>moov<\/code>\uff09\uff0c\u66f4\u591a\u4fe1\u606f\u53ef\u4ee5\u67e5\u770b <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fwww.w3.org%2FTR%2Fmse-byte-stream-format-isobmff%2F\" target=\"_blank\" rel=\"noreferrer noopener\">ISO BMFF Byte Stream Format<\/a>\u3002<\/p>\n\n\n\n<p>moov \u53ea\u5305\u542b\u4e00\u4e9b\u89c6\u9891\u57fa\u7840\u7684\u4fe1\u606f\uff08\u7c7b\u578b\uff0c\u7f16\u7801\u5668\u7b49\uff09\uff0cmoof \u5b58\u653e\u6837\u672c\u4f4d\u7f6e\u548c\u5927\u5c0f\uff0cmoof \u6846\u540e\u90fd\u6709\u4e00\u4e2a mdat\uff0c\u5176\u4e2d\u5305\u542b\u5982\u524d\u9762\u7684 moof \u6846\u4e2d\u6240\u8ff0\u7684\u6837\u672c\u3002<\/p>\n\n\n\n<p>\u8981\u67e5\u770b\u5f53\u524d\u89c6\u9891\u662f\u4e0d\u662f fmp4\uff0c\u5c31\u53ef\u4ee5\u770b ftyp \u540e\u9762\u662f\u4e0d\u662f\u8ddf\u7740 moov\uff0c\u7136\u540e\u662f moof mdat \u5bf9\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n<p>\u8981\u5c06\u666e\u901a MP4 \u8f6c\u6362\u6210 FMP4 \u53ef\u4ee5\u4e0b\u8f7d <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fwww.bento4.com%2Fdownloads%2F\" target=\"_blank\" rel=\"noreferrer noopener\">Bento4<\/a>\u3002\u7136\u540e\u7528\u547d\u4ee4\u884c\u8f93\u5165\u5982\u4e0b\u547d\u4ee4\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mp4fragment .\/friday.mp4 .\/friday.fmp4\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>Bento4 <code>\/bin<\/code> \u76ee\u5f55\u4e2d\u6709\u975e\u5e38\u591a\u597d\u7528\u7684 mp4 \u5de5\u5177\uff0c<code>\/utils<\/code> \u76ee\u5f55\u4e2d\u90fd\u662f <code>python<\/code> \u5b9e\u7528\u811a\u672c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5de5\u5177<\/h2>\n\n\n\n<p>\u9664\u4e86\u4e0a\u9762\u4ecb\u7ecd\u7684 Bento4\uff0c\u8fd8\u6709\u5f88\u591a\u5176\u4ed6\u597d\u7528\u7684\u5de5\u5177\u3002\u6709\u4e86\u4e0b\u9762\u7684\u5de5\u5177\uff0c\u5c31\u53ef\u4ee5\u5feb\u901f\u5236\u4f5c MSE \u5b9e\u8df5\u7684\u89c6\u9891\u7d20\u6750\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">chrome:\/\/media-internals\/<\/h3>\n\n\n\n<p><code>chrome:\/\/media-internals\/<\/code> \u662f chrome \u6d4f\u89c8\u5668\u7528\u6765\u8c03\u8bd5\u591a\u5a92\u4f53\u7684\u5de5\u5177\uff0c\u76f4\u63a5\u5728\u5730\u5740\u680f\u8f93\u5165\u8be5\u503c\u5c31\u53ef\u4ee5\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/4c9875884e7f4df4a4011f593aa0729a~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Shaka Packager<\/h3>\n\n\n\n<p><a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fgithub.com%2Fgoogle%2Fshaka-packager%2Freleases\" target=\"_blank\" rel=\"noreferrer noopener\">Shaka Packager<\/a> \u662f Google \u51fa\u7684\u4e00\u4e2a\u5c0f\u5de7\u89c6\u9891\u5de5\u5177\uff0c\u5b83\u53ea\u6709 5M \u5de6\u53f3\uff0c\u5b83\u53ef\u4ee5\u7528\u6765\u67e5\u770b\u89c6\u9891\u4fe1\u606f\uff0c\u5206\u79bb\u97f3\u9891\u548c\u89c6\u9891\uff0c\u8fd8\u652f\u6301 HLS \u548c DASH\u3002<\/p>\n\n\n\n<p>\u5b83\u7684\u547d\u4ee4\u884c\u4f7f\u7528\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>packager stream_descriptor&#91;,stream_descriptor] &#91;flags]\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u6bd4\u5982\u7528\u5b83\u67e5\u770b\u89c6\u9891\u4fe1\u606f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>packager in=friday.mp4 --dump_stream_info # \u67e5\u770b\u89c6\u9891\u4fe1\u606f\n\nFile \"friday.mp4\":\nFound 2 stream(s).\nStream &#91;0] type: Audio\n codec_string: mp4a.40.2 # \u97f3\u9891\u7684\u7f16\u7801\u5668\u5b57\u7b26\u4e32\n time_scale: 44100\n duration: 271360 (6.2 seconds)\n is_encrypted: false\n codec: AAC\n sample_bits: 16\n num_channels: 2\n sampling_frequency: 44100\n language: und\n\nStream &#91;1] type: Video\n codec_string: avc1.4d401e # \u89c6\u9891\u7684\u7f16\u7801\u5668\u5b57\u7b26\u4e32\n time_scale: 3000\n duration: 18500 (6.2 seconds)\n is_encrypted: false\n codec: H264\n width: 640\n height: 480\n pixel_aspect_ratio: 1:1\n trick_play_factor: 0\n nalu_length_size: 4\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u66f4\u591a\u8bf7\u67e5\u770b<a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fgoogle.github.io%2Fshaka-packager%2Fhtml%2Ftutorials%2Ftutorials.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u5b98\u65b9\u6587\u6863<\/a>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">FFmpeg<\/h3>\n\n\n\n<p><a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fwww.ffmpeg.org%2Fdownload.html\" target=\"_blank\" rel=\"noreferrer noopener\">FFmpeg<\/a> \u662f\u529f\u80fd\u975e\u5e38\u5f3a\u5927\u7684\u89c6\u9891\u5904\u7406\u5f00\u6e90\u8f6f\u4ef6\uff0c\u5f88\u591a\u89c6\u9891\u64ad\u653e\u5668\u5c31\u662f\u4f7f\u7528\u5b83\u6765\u505a\u4e3a\u5185\u6838\u3002\u540e\u9762\u6587\u7ae0\u7684\u5b9e\u4f8b\u90fd\u4f1a\u4f7f\u7528\u8fd9\u4e2a\u5de5\u5177\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u4e0a\u9762\u5c06\u666e\u901a MP4 \u8f6c\u6362\u4e3a FMP4\uff0c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -i .\/friday.mp4 -movflags empty_moov+frag_keyframe+default_base_moof f.mp4\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u5b83\u7684\u547d\u4ee4\u884c\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg &#91;global_options] {&#91;input_file_options] -i input_url} ... {&#91;output_file_options] output_url} ...\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u5b83\u53ef\u4ee5\u6709\u4e0d\u9650\u6570\u91cf\u7684\u8f93\u5165\u548c\u8f93\u51fa\u6587\u4ef6\uff0c<code>-i<\/code> \u540e\u9762\u662f\u8f93\u5165 url\uff0c\u540e\u9762\u4e0d\u80fd\u89e3\u6790\u4e3a\u53c2\u6570\u7684\u4e3a\u8f93\u51fa\u6587\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> _______              ______________\n|       |            |              |\n| input |  demuxer   | encoded data |   decoder\n| file  | ---------&gt; | packets      | -----+\n|_______|            |______________|      |\n                                           v\n                                       _________\n                                      |         |\n                                      | decoded |\n                                      | frames  |\n                                      |_________|\n ________             ______________       |\n|        |           |              |      |\n| output | &lt;-------- | encoded data | &lt;----+\n| file   |   muxer   | packets      |   encoder\n|________|           |______________|\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u5b83\u5c06\u8f93\u5165\u6587\u4ef6\u7684\u5bb9\u5668\u89e3\u5f00\uff0c\u7136\u540e\u5bf9\u91cc\u9762\u7684\u6570\u636e\u8fdb\u884c\u89e3\u7801\uff0c\u7136\u540e\u6309\u7167\u6307\u5b9a\u7684\u683c\u5f0f\u8fdb\u884c\u7f16\u7801\uff0c\u7136\u540e\u4f7f\u7528\u6307\u5b9a\u7684\u5bb9\u5668\u8fdb\u884c\u5c01\u88c5\u751f\u6210\u8f93\u51fa\u6587\u4ef6\u3002\u5728 <code>decoded frames<\/code> \u540e FFmpeg \u53ef\u4ee5\u4f7f\u7528 filter \u8fdb\u884c\u5904\u7406\uff0c\u6bd4\u5982\u6dfb\u52a0\u6ee4\u955c\u3001\u65cb\u8f6c\u3001\u9510\u5316\u7b49\u64cd\u4f5c\uff0cfilter \u5206\u4e3a\u7b80\u5355\u548c\u590d\u6742\uff0c\u590d\u6742\u53ef\u4ee5\u5904\u7406\u591a\u4e2a\u8f93\u5165\u6d41\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u6211\u4eec\u53ea\u662f\u60f3\u6539\u53d8\u89c6\u9891\u7684\u5bb9\u5668\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u7701\u7565\u89e3\u7801\u548c\u7f16\u7801\u8fc7\u7a0b\uff0c\u6765\u63d0\u5347\u901f\u5ea6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -i input.avi -c copy output.mp4\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p><code>-c<\/code> \u662f\u6307\u5b9a\u7f16\u7801\u5668\uff0c<code>-c copy<\/code> \u8868\u793a\u76f4\u63a5\u590d\u5236\u7f16\u7801\uff0c<code>-c:v<\/code> \u8868\u793a\u89c6\u9891\u7f16\u7801\uff0c<code>-c:a<\/code> \u8868\u793a\u97f3\u9891\u7f16\u7801\uff0c\u6bd4\u5982 <code>-c:v libx264<\/code> \u8868\u793a\u4f7f\u7528 CPU \u5c06\u89c6\u9891\u7f16\u7801\u4e3a <code>h.264<\/code>\uff0c<code>-c:v h264_nvenc<\/code> \u5219\u662f\u4f7f\u7528 N\u5361\uff0c\u8fd9\u6837\u901f\u5ea6\u66f4\u5feb\u3002<code>-c:a copy<\/code> \u8868\u793a\u76f4\u63a5\u590d\u5236\u97f3\u9891\u7f16\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -y -i myvideo.mp4 -c:v copy -an myvideo_video.mp4\nffmpeg -y -i myvideo.mp4 -c:a copy -vn myvideo_audio.m4a\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p><code>-an<\/code> \u53bb\u9664\u97f3\u9891\u6d41 <code>-vn<\/code> \u53bb\u9664\u89c6\u9891\u6d41\u3002<code>-y<\/code> \u662f\u4e0d\u7ecf\u8fc7\u786e\u8ba4\uff0c\u8f93\u51fa\u65f6\u76f4\u63a5\u8986\u76d6\u540c\u540d\u6587\u4ef6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -help #\u67e5\u770b\u5e2e\u52a9\nffmpeg -i input.mp4 # \u67e5\u770b\u89c6\u9891\u4fe1\u606f\nffmpeg -formats # \u67e5\u770b\u652f\u6301\u7684\u5bb9\u5668\nffmpeg -codecs # \u67e5\u770b\u652f\u6301\u7684\u7f16\u7801\u683c\u5f0f\nffmpeg -encoders # \u67e5\u770b\u5185\u7f6e\u7684\u7f16\u7801\u5668\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u66f4\u591a\u5173\u4e8e FFmpeg \u8bf7\u67e5\u770b<a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fwww.ffmpeg.org%2Fffmpeg-all.html\" target=\"_blank\" rel=\"noreferrer noopener\">\u5b98\u65b9\u6587\u6863<\/a>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u89c6\u9891\u7f29\u7565\u56fe\u9884\u89c8<\/h2>\n\n\n\n<p>\u4e86\u89e3\u4e86\u4e0a\u9762\u597d\u7528\u7684\u5de5\u5177\uff0c\u5c31\u6765\u7528 FFmpeg \u6765\u5b9e\u73b0\u4e00\u4e2a\u89c6\u9891\u64ad\u653e\u5668\u5c0f\u529f\u80fd\u5427\u3002<\/p>\n\n\n\n<p>\u73b0\u5728\u89c6\u9891\u7f51\u7ad9\uff0c\u5f53\u9f20\u6807\u653e\u5230\u8fdb\u5ea6\u6761\u4e0a\u65f6\u5c31\u4f1a\u51fa\u73b0\uff0c\u4e00\u4e2a\u5c0f\u7f29\u7565\u56fe\u6765\u9884\u89c8\u8fd9\u4e2a\u65f6\u95f4\u70b9\u5185\u5bb9\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -i .\/test.webm -vf 'fps=1\/10:round=zero:start_time=-9,scale=160x90,tile=5x5' M%d.jpg\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0a\u9762\u8fd9\u4e2a\u547d\u4ee4\u751f\u6210\u4e00\u4e2a\u96ea\u78a7\u56fe\uff0c\u7531 25 \u5f20 160&#215;90 \u9884\u89c8\u56fe\u7ec4\u6210\u3002<\/p>\n\n\n\n<p><code>-vf<\/code> \u53c2\u6570\u540e\u9762\u8ddf\u7740\u8fc7\u6ee4\u5668\uff0c\u591a\u4e2a\u8fc7\u6ee4\u5668\u7528 <code>,<\/code> \u5206\u5f00\uff0c\u4e00\u4e2a\u8fc7\u6ee4\u5668\u591a\u4e2a\u53c2\u6570\u4f7f\u7528 <code>:<\/code> \u5206\u5f00\u3002<\/p>\n\n\n\n<p><code>fps=1\/10<\/code> \u8868\u793a 10 \u79d2\u8f93\u51fa\u4e00\u5f20\u56fe\uff0c<code>fps=1\/60<\/code> \u4e3a\u4e00\u5206\u949f\u4e00\u5f20\uff0c<code>round=zero<\/code> \u65f6\u95f4\u6233\u5411 0 \u53d6\u6574\uff0c<code>start_time=-9<\/code> \u662f\u56e0\u4e3a <code>fps<\/code> \u662f\u6bcf\u591a\u5c11\u79d2\u751f\u6210\u4e00\u5f20\uff0c\u5e76\u4e0d\u662f\u4ece 0 \u79d2\u5f00\u59cb <code>-9<\/code> \u662f\u8ba9\u5b83\u4ece 1 \u79d2\u5f00\u59cb\u622a\u53d6\uff0c\u5ffd\u7565\u6389 0 \u79d2\u7684\u9ed1\u5c4f\u5e27\u3002<\/p>\n\n\n\n<p><code>scale=160x90<\/code> \u8bbe\u7f6e\u8f93\u51fa\u56fe\u50cf\u5206\u8fa8\u7387\u5927\u5c0f\uff0c<code>tile=5x5<\/code> \u5c06\u5c0f\u56fe\u7528 5&#215;5 \u7684\u65b9\u5f0f\u7ec4\u5408\u5728\u4e00\u8d77\uff0c<code>M%d.jpg<\/code> \u8868\u793a\u8f93\u51fa\u4e3a jpg\uff0c\u800c\u4e14\u6587\u4ef6\u662f <code>M1.jpg M2.jpg...<\/code> \u8fd9\u6837\u9012\u589e\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u5982\u679c\u60f3\u7528 NodeJS\uff0c\u53ef\u4ee5\u7528 node-fluent-ffmpeg \u7684 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fgithub.com%2Ffluent-ffmpeg%2Fnode-fluent-ffmpeg%23screenshotsoptions-dirname-generate-thumbnails\" target=\"_blank\" rel=\"noreferrer noopener\">thumbnails<\/a> \u65b9\u6cd5\u6765\u751f\u6210\u3002<\/p><\/blockquote>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p3-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/229a4f50d5d84b96904b47f90edc06a6~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u6709\u4e86\u96ea\u78a7\u56fe\uff0c\u6211\u4eec\u5c31\u5728\u4e0a\u7bc7\u6587\u7ae0\u5b9e\u73b0\u7684\u64ad\u653e\u5668\u7684\u57fa\u7840\u4e0a\u5728\u52a0\u4e2a\u89c6\u9891\u7f29\u7565\u56fe\u529f\u80fd\u3002\u4e3b\u8981\u901a\u8fc7 css \u7684 <code>background<\/code> \u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const thumb = document.querySelector('.thumb')\nconst gapSec = 10 \/\/ \u4e00\u5f20\u56fe\u7247\u663e\u793a\u51e0\u79d2\nconst images = &#91;...] \/\/ \u56fe\u7247\nconst row = 5, col = 5 \/\/ \u4e00\u5f20\u56fe\u6709\u51e0\u884c\u51e0\u5217\nconst width = 160, height = 90; \/\/ \u7f29\u7565\u56fe\u7684\u5bbd\u9ad8\nconst thumbQuantityPerImg = col * row\n\nfunction updateThumbnail(seconds) { \/\/ \u4f20\u5165\u8981\u663e\u793a\u7f29\u7565\u56fe\u7684\u79d2\u6570\n    const thumbNum = (seconds \/ gapSec) | 0; \/\/ \u5f53\u524d\u662f\u7b2c\u51e0\u5f20\u7f29\u7565\u56fe\n    const url = images&#91;(thumbNum \/ thumbQuantityPerImg) | 0];\n    const x = (thumbNum % col) * width; \/\/ x \u7684\u504f\u79fb\u91cf\n    const y = ~~((thumbNum % thumbQuantityPerImg) \/ row) * height; \/\/ y \u7684\u504f\u79fb\u91cf\n\n    thumb.style.backgroundImage = `url(${url})`;\n    thumb.style.backgroundPosition = `-${x}px -${y}px`;\n}\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u6548\u679c\u5982\u4e0b<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/p1-juejin.byteimg.com\/tos-cn-i-k3u1fbpfcp\/7dbca167b60241ea8789b0240080381b~tplv-k3u1fbpfcp-zoom-in-crop-mark:3024:0:0:0.awebp\" alt=\"image.png\"\/><\/figure>\n\n\n\n<p>\u8fd9\u91cc\u53ea\u5c55\u793a\u7f29\u7565\u56fe\u66f4\u65b0\u7684\u903b\u8f91\uff0c\u5ffd\u7565\u4e86\u65f6\u95f4\u663e\u793a\uff0c\u4e8b\u4ef6\u5904\u7406\u548c\u6837\u5f0f\u7b49\u4ee3\u7801\u3002<\/p>\n\n\n\n<p>\u5b8c\u6574\u7684\u4ee3\u7801\u8bf7\u53c2\u8003 <a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fgithub.com%2Fwoopen%2Fnplayer\" target=\"_blank\" rel=\"noreferrer noopener\">NPlayer<\/a>\u3002<\/p>\n\n\n\n<p>\u5728\u7ebf\u6f14\u793a\uff1a<a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fnplayer.js.org%2F\" target=\"_blank\" rel=\"noreferrer noopener\">nplayer.js.org\/<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u89c6\u9891\u5207\u7247<\/h2>\n\n\n\n<p>\u6709\u4e86 MSE \u6211\u4eec\u5c31\u53ef\u4ee5\u5c06\u4e00\u4e2a\u89c6\u9891\u5206\u5272\u6210\u591a\u4e2a\u5c0f\u89c6\u9891\uff0c\u7136\u540e\u53ef\u4ee5\u81ea\u5df1\u63a7\u5236\u7f13\u5b58\u8fdb\u5ea6\u6765\u8282\u7701\u6d41\u91cf\uff0c\u8fd8\u53ef\u4ee5\u5c06\u89c6\u9891\u538b\u7f29\u6210\u4e0d\u540c\u7684\u5206\u8fa8\u7387\uff0c\u5728\u7528\u6237\u7f51\u4e0d\u597d\u7684\u60c5\u51b5\u52a8\u6001\u52a0\u8f7d\u7801\u7387\u4f4e\u7684\u5206\u6bb5\uff0c\u5206\u6210\u591a\u6bb5\u8fd8\u53ef\u4ee5\u5b9e\u73b0\u63d2\u5165\u5e7f\u544a\uff0c\u52a8\u6001\u5207\u6362\u97f3\u9891\u8bed\u8a00\u7b49\u529f\u80fd\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>.\/audio\/\n  \u251c\u2500\u2500 .\/128kbps\/\n  |     \u251c\u2500\u2500 segment0.mp4\n  |     \u251c\u2500\u2500 segment1.mp4\n  |     \u2514\u2500\u2500 segment2.mp4\n  \u2514\u2500\u2500 .\/320kbps\/\n        \u251c\u2500\u2500 segment0.mp4\n        \u251c\u2500\u2500 segment1.mp4\n        \u2514\u2500\u2500 segment2.mp4\n.\/video\/\n  \u251c\u2500\u2500 .\/240p\/\n  |     \u251c\u2500\u2500 segment0.mp4\n  |     \u251c\u2500\u2500 segment1.mp4\n  |     \u2514\u2500\u2500 segment2.mp4\n  \u2514\u2500\u2500 .\/720p\/\n        \u251c\u2500\u2500 segment0.mp4\n        \u251c\u2500\u2500 segment1.mp4\n        \u2514\u2500\u2500 segment2.mp4\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u5f53\u7136\u4e5f\u53ef\u4ee5\u4e0d\u5207\u5272\u89c6\u9891\uff0c\u800c\u4f7f\u7528 HTTP Range \u6765\u8303\u56f4\u8bf7\u6c42\u6570\u636e\u3002<\/p><\/blockquote>\n\n\n\n<pre class=\"wp-block-code\"><code>ffmpeg -i .\/friday.mp4 -f segment -segment_time 2 -segment_format_options movflags=dash ff%04d.mp4\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u6211\u4eec\u4f7f\u7528\u4e0a\u9762\u547d\u4ee4\u5c06\u4e00\u4e2a\u89c6\u9891\u5207\u6210 2 \u79d2\u7684 fmp4 \u89c6\u9891\u7247\u6bb5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>window.MediaSource = window.MediaSource || window.WebKitMediaSource\nconst video = document.querySelector('video')\nconst mime = 'video\/mp4; codecs=\"avc1.4d401e, mp4a.40.2\"'\nconst segments = &#91;\n    '\/static\/media\/ff0000.5b66d30e.mp4', \n    '\/static\/media\/ff0001.89895c46.mp4', \n    '\/static\/media\/ff0002.44cfe1e4.mp4'\n]\nconst segmentData = &#91;]\nlet currentSegment = 0\n\nif ('MediaSource' in window &amp;&amp; MediaSource.isTypeSupported(mime)) {\n    const ms = new MediaSource()\n    video.src = URL.createObjectURL(ms)\n    mediaSource.addEventListener('sourceopen', sourceOpen)\n}\n\nfunction sourceOpen({ target }) {\n    URL.revokeObjectURL(video.src)\n    target.removeEventListener('sourceopen', sourceOpen)\n    const sb = target.addSourceBuffer(mime)\n    fetchSegment(ab =&gt; sb.appendBuffer(ab))\n    sb.addEventListener('updateend', () =&gt; {\n        if (!sb.updating &amp;&amp; segmentData.length ) {\n            sb.appendBuffer(segmentData.shift())\n        }\n    })\n    video.addEventListener('timeupdate', function timeupdate() {\n        if (\n            currentSegment &gt; segments.length &amp;&amp;\n            !sb.updating &amp;&amp;\n            target.readyState === 'open'\n        ) { \/\/ \u6240\u6709\u7247\u6bb5\u5168\u90e8\u52a0\u8f7d\u5b8c\u6210\n            target.endOfStream()\n            video.removeEventListener('timeupdate', timeupdate)\n        } else if (\n            video.currentTime &gt; (currentSegment * 2 * 0.8) \n            \/\/ \u4e00\u4e2a\u7247\u6bb5\u65f6\u957f 2 \u79d2\n            \/\/ \u5728\u4e00\u4e2a\u7247\u6bb5\u64ad\u653e\u5230 80% \u7684\u65f6\u5019\u624d\u53bb\u8bf7\u6c42\u4e0b\u4e00\u4e2a\u7247\u6bb5\n        ) {\n            fetchSegment(ab =&gt; {\n                if (sb.updating) {\n                    segmentData.push(ab)\n                } else {\n                    sb.appendBuffer(ab)\n                }\n            })\n        }\n    })\n    video.addEventListener('canplay', () =&gt; {\n        video.play()\n    })\n}\n\nfunction fetchSegment(cb) {\n    fetch(segments&#91;currentSegment])\n        .then(response =&gt; response.arrayBuffer())\n        .then(arrayBuffer =&gt; {\n            currentSegment += 1\n            cb(arrayBuffer)\n        })\n}\n\u590d\u5236\u4ee3\u7801<\/code><\/pre>\n\n\n\n<p>\u8fd9\u4e2a\u5b9e\u4f8b\u975e\u5e38\u7b80\u5355\uff0c\u5e76\u6ca1\u6709\u5904\u7406 seek\uff0c\u81ea\u9002\u5e94\u7801\u7387\u7b49\u590d\u6742\u529f\u80fd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<p>\u73b0\u5728\u89c6\u9891\u7f51\u7ad9\u51e0\u4e4e\u5168\u90e8\u90fd\u5728\u4f7f\u7528 MSE \u6765\u64ad\u653e\u89c6\u9891\u3002\u4f7f\u7528 MSE \u6709\u63d0\u4f9b\u66f4\u597d\u7684\u7528\u6237\u4f53\u9a8c\uff0c\u66f4\u52a0\u8282\u7ea6\u6210\u672c\u7b49\u597d\u5904\u3002\u867d\u7136\u89c6\u9891\u64ad\u653e\u4e00\u822c\u4f7f\u7528 <code>hls<\/code> <code>dash<\/code> \u7b49\u534f\u8bae\u7684\u5f00\u6e90\u5ba2\u6237\u7aef\u6765\u64ad\u653e\u89c6\u9891\uff0c\u6211\u4eec\u81ea\u5df1\u4e0d\u4f1a\u4f7f\u7528\u5230 MSE\uff0c\u4f46\u8fd9\u4e9b\u5ba2\u6237\u7aef\u5e95\u5c42\u90fd\u662f\u4f7f\u7528 MSE\uff0c\u4e86\u89e3 MSE \u624d\u66f4\u4e86\u89e3\u8fd9\u4e9b\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5b98\u7f51\uff1a<a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fnplayer.js.org\" target=\"_blank\" rel=\"noreferrer noopener\">nplayer.js.org<\/a><\/li><li>\u6e90\u7801\uff1a<a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fgithub.com%2Fwoopen%2Fnplayer\" target=\"_blank\" rel=\"noreferrer noopener\">github.com\/woopen\/npla\u2026<\/a><\/li><li>\u5728\u7ebf\u7f16\u8f91 &amp; \u9884\u89c8\uff1a<a href=\"https:\/\/link.juejin.cn?target=https%3A%2F%2Fcodesandbox.io%2Fs%2Fancient-sky-ujtms%3Ffile%3D%2Fsrc%2Findex.js\" target=\"_blank\" rel=\"noreferrer noopener\">codesandbox.io\/s\/ancient-s\u2026<\/a><\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u8fd9\u662f\u5f39\u5e55\u64ad\u653e\u5668\u7cfb\u5217\u6587\u7ae0\u7b2c\u4e8c\u7bc7\uff0c\u4e0a\u7bc7\u8bf7\u67e5\u770b\u00a0<a rel=\"noreferrer noopener\" href=\"https:\/\/juejin.cn\/post\/6953429334937829384\" target=\"_blank\">\u4ece\u96f6\u5f00\u53d1\u5f39\u5e55\u89c6\u9891\u64ad\u653e\u56681<\/a>\u3002\u4e0b\u7bc7\u8bf7\u67e5\u770b\u00a0<a rel=\"noreferrer noopener\" href=\"https:\/\/juejin.cn\/post\/6954761121727250439\" target=\"_blank\">\u539f\u6765\u7231\u4f18\u817e\u7b49\u89c6\u9891\u7f51\u7ad9\u90fd\u662f\u7528\u8fd9\u4e2a\u6765\u64ad\u653e\u6d41\u5a92\u4f53\u7684<\/a><\/p>\n\n\n\n<p>\u4f5c\u8005\uff1awopen<br>\u94fe\u63a5\uff1ahttps:\/\/juejin.cn\/post\/6953777965838630926<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u679c\u68c0\u67e5\u4e3b\u6d41\u89c6\u9891\u7f51\u7ad9\u7684\u89c6\u9891\uff0c\u5c31\u4f1a\u53d1\u73b0\u7f51\u7ad9\u7684 video \u5143\u7d20\u7684 src \u5c5e\u6027\u90fd\u662f blob \u5f00\u5934\u7684\u5b57\u7b26\u4e32\u3002 \u4e3a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-1208","post","type-post","status-publish","format-standard","hentry","category-24"],"_links":{"self":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts\/1208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1208"}],"version-history":[{"count":0,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/posts\/1208\/revisions"}],"wp:attachment":[{"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1208"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.xtaa.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}