{"id":786,"date":"2026-01-25T09:50:50","date_gmt":"2026-01-25T01:50:50","guid":{"rendered":"https:\/\/ixriver.com\/?p=786"},"modified":"2026-01-25T09:50:50","modified_gmt":"2026-01-25T01:50:50","slug":"%e5%bc%b1%e7%bd%91%e5%af%b9%e6%8a%97%e6%8a%80%e6%9c%af%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/www.v.ixriver.com\/?p=786","title":{"rendered":"\u5f31\u7f51\u5bf9\u6297\u6280\u672f\u65b9\u6848"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg 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\u8f6f\u7f16\u7801\u5668\u52a8\u6001\u914d\u7f6e (Software Encoder Reconfiguration)\">2. \u8f6f\u7f16\u7801\u5668\u52a8\u6001\u914d\u7f6e (Software Encoder Reconfiguration)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#3_%E5%8D%87%E7%BB%B4%E9%99%8D%E7%BB%B4_%E5%86%B7%E5%8D%B4%E6%9C%BA%E5%88%B6_Cool-down\" title=\"3. \u5347\u7ef4\/\u964d\u7ef4 \u51b7\u5374\u673a\u5236 (Cool-down)\">3. \u5347\u7ef4\/\u964d\u7ef4 \u51b7\u5374\u673a\u5236 (Cool-down)<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E4%B8%89%E3%80%81%E5%85%B7%E4%BD%93%E7%9A%84%E5%8F%82%E6%95%B0%E8%B0%83%E6%95%B4%E7%AE%97%E6%B3%95%E7%A4%BA%E4%BE%8B_%E4%BC%AA%E4%BB%A3%E7%A0%81%E9%80%BB%E8%BE%91\" title=\"\u4e09\u3001\u5177\u4f53\u7684\u53c2\u6570\u8c03\u6574\u7b97\u6cd5\u793a\u4f8b (\u4f2a\u4ee3\u7801\u903b\u8f91)\">\u4e09\u3001\u5177\u4f53\u7684\u53c2\u6570\u8c03\u6574\u7b97\u6cd5\u793a\u4f8b (\u4f2a\u4ee3\u7801\u903b\u8f91)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E7%8A%B6%E6%80%81%E6%9C%BA%E9%80%BB%E8%BE%91\" title=\"\u72b6\u6001\u673a\u903b\u8f91\">\u72b6\u6001\u673a\u903b\u8f91<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#1_%E6%8E%A2%E6%B5%8B%E9%98%B6%E6%AE%B5\" title=\"1. \u63a2\u6d4b\u9636\u6bb5\">1. \u63a2\u6d4b\u9636\u6bb5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#2_%E5%86%B3%E7%AD%96%E9%98%B6%E6%AE%B5\" title=\"2. \u51b3\u7b56\u9636\u6bb5\">2. \u51b3\u7b56\u9636\u6bb5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#3_%E6%89%A7%E8%A1%8C%E9%98%B6%E6%AE%B5%EF%BC%88%E9%92%88%E5%AF%B9_RTMP_%E6%97%A0%E6%B3%95%E5%8A%A8%E6%80%81%E5%88%87%E5%88%86%E8%BE%A8%E7%8E%87%E7%9A%84%E5%A6%A5%E5%8D%8F%EF%BC%89\" title=\"3. \u6267\u884c\u9636\u6bb5\uff08\u9488\u5bf9 RTMP \u65e0\u6cd5\u52a8\u6001\u5207\u5206\u8fa8\u7387\u7684\u59a5\u534f\uff09\">3. \u6267\u884c\u9636\u6bb5\uff08\u9488\u5bf9 RTMP \u65e0\u6cd5\u52a8\u6001\u5207\u5206\u8fa8\u7387\u7684\u59a5\u534f\uff09<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E5%9B%9B%E3%80%81%E8%BF%9B%E9%98%B6%EF%BC%9AAI_%E8%BE%85%E5%8A%A9%E7%9A%84%E6%99%BA%E8%83%BD%E6%B5%81%E6%8E%A7\" title=\"\u56db\u3001\u8fdb\u9636\uff1aAI \u8f85\u52a9\u7684\u667a\u80fd\u6d41\u63a7\">\u56db\u3001\u8fdb\u9636\uff1aAI \u8f85\u52a9\u7684\u667a\u80fd\u6d41\u63a7<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#1_%E5%9C%BA%E6%99%AF%E8%AF%86%E5%88%AB\" title=\"1. \u573a\u666f\u8bc6\u522b\">1. \u573a\u666f\u8bc6\u522b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#2_%E7%BD%91%E7%BB%9C%E9%A2%84%E6%B5%8B\" title=\"2. \u7f51\u7edc\u9884\u6d4b\">2. \u7f51\u7edc\u9884\u6d4b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#3_ROI_%E7%BC%96%E7%A0%81_Region_of_Interest\" title=\"3. ROI \u7f16\u7801 (Region of Interest)\">3. ROI \u7f16\u7801 (Region of Interest)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E6%80%BB%E7%BB%93%E5%BB%BA%E8%AE%AE\" title=\"\u603b\u7ed3\u5efa\u8bae\">\u603b\u7ed3\u5efa\u8bae<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E8%B5%B7%E6%AD%A5%E9%98%B6%E6%AE%B5\" title=\"\u8d77\u6b65\u9636\u6bb5\">\u8d77\u6b65\u9636\u6bb5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E8%BF%9B%E9%98%B6%E9%98%B6%E6%AE%B5\" title=\"\u8fdb\u9636\u9636\u6bb5\">\u8fdb\u9636\u9636\u6bb5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.v.ixriver.com\/?p=786\/#%E9%AB%98%E9%98%B6%E9%98%B6%E6%AE%B5%EF%BC%88WebRTC%EF%BC%89\" title=\"\u9ad8\u9636\u9636\u6bb5\uff08WebRTC\uff09\">\u9ad8\u9636\u9636\u6bb5\uff08WebRTC\uff09<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E5%BC%B1%E7%BD%91%E5%AF%B9%E6%8A%97%E6%8A%80%E6%9C%AF%E6%96%B9%E6%A1%88\"><\/span>\u5f31\u7f51\u5bf9\u6297\u6280\u672f\u65b9\u6848<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"%E6%A6%82%E8%BF%B0\"><\/span>\u6982\u8ff0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5728\u76f4\u64ad\u573a\u666f\u4e2d\uff0c\u6839\u636e\u7f51\u7edc\u60c5\u51b5\u52a8\u6001\u8c03\u6574\u7f16\u7801\u53c2\u6570\uff08\u5373<strong>\u5f31\u7f51\u5bf9\u6297<\/strong>\u6216<strong>\u81ea\u9002\u5e94\u7801\u7387\/QoS\u7b56\u7565<\/strong>\uff09\u662f\u4fdd\u8bc1\u7528\u6237\u4f53\u9a8c\uff08QoE\uff09\u7684\u6838\u5fc3\u6280\u672f\u3002<\/p>\n<p>\u4e1a\u754c\u6210\u719f\u7684\u65b9\u6848\u901a\u5e38\u9075\u5faa\u4e00\u4e2a\u95ed\u73af\u63a7\u5236\u7cfb\u7edf\uff1a<strong>\u7f51\u7edc\u63a2\u6d4b\uff08Sensing\uff09 -&gt; \u7b56\u7565\u51b3\u7b56\uff08Decision\uff09 -&gt; \u7f16\u7801\u6267\u884c\uff08Execution\uff09<\/strong>\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u9488\u5bf9\u4e0d\u540c\u76f4\u64ad\u67b6\u6784\uff08WebRTC\/\u5b9e\u65f6\u4e92\u52a8 vs RTMP\/CDN\u63a8\u6d41\uff09\u7684\u4e1a\u754c\u6210\u719f\u65b9\u6848\u8be6\u89e3\uff1a<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E4%B8%80%E3%80%81%E6%A0%B8%E5%BF%83%E9%80%BB%E8%BE%91%E9%97%AD%E7%8E%AF\"><\/span>\u4e00\u3001\u6838\u5fc3\u903b\u8f91\u95ed\u73af<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_%E7%BD%91%E7%BB%9C%E6%8E%A2%E6%B5%8B%EF%BC%88Sensing%EF%BC%89%EF%BC%9A%E6%80%8E%E4%B9%88%E7%9F%A5%E9%81%93%E7%BD%91%E7%BB%9C%E5%8F%98%E5%B7%AE%E4%BA%86%EF%BC%9F\"><\/span>1. \u7f51\u7edc\u63a2\u6d4b\uff08Sensing\uff09\uff1a\u600e\u4e48\u77e5\u9053\u7f51\u7edc\u53d8\u5dee\u4e86\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8fd9\u662f\u57fa\u7840\uff0c\u901a\u5e38\u901a\u8fc7\u4f20\u8f93\u5c42\u534f\u8bae\u53cd\u9988\u83b7\u53d6\u6307\u6807\uff1a<\/p>\n<ul>\n<li><strong>\u53d1\u9001\u7f13\u51b2\u533a\u5806\u79ef (Buffer Level):<\/strong> RTMP\/TCP\u573a\u666f\u4e0b\uff0c\u5982\u679c\u672c\u5730\u53d1\u9001Buffer\u53d8\u5927\uff0c\u8bf4\u660e\u4e0a\u884c\u5e26\u5bbd\u4e0d\u8db3\u3002<\/li>\n<li><strong>\u4e22\u5305\u7387 (Packet Loss):<\/strong> \u63a5\u6536\u7aef\u901a\u8fc7RTCP (RR) \u6216 NACK \u53cd\u9988\u4e22\u5305\u60c5\u51b5\u3002<\/li>\n<li><strong>\u5f80\u8fd4\u65f6\u5ef6 (RTT):<\/strong> \u8861\u91cf\u7f51\u7edc\u62e5\u585e\u7a0b\u5ea6\u7684\u91cd\u8981\u6307\u6807\u3002<\/li>\n<li><strong>\u5e26\u5bbd\u4f30\u8ba1 (BWE &#8211; Bandwidth Estimation):<\/strong> \u8fd9\u662f\u6700\u6838\u5fc3\u7684\u6280\u672f\uff08\u5982 WebRTC \u4e2d\u7684 GCC \u7b97\u6cd5\uff09\u3002<\/li>\n<li><em>\u57fa\u4e8e\u5ef6\u8fdf (Delay-based):<\/em> \u53d1\u73b0\u5355\u5411\u5ef6\u8fdf\u589e\u52a0\uff08One-way delay variation\uff09\uff0c\u9884\u793a\u62e5\u585e\u5373\u5c06\u53d1\u751f\uff0c\u964d\u4f4e\u7801\u7387\u3002<\/li>\n<li><em>\u57fa\u4e8e\u4e22\u5305 (Loss-based):<\/em> \u53d1\u73b0\u4e22\u5305\u5df2\u7ecf\u53d1\u751f\uff0c\u6025\u5267\u964d\u4f4e\u7801\u7387\u3002<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"2_%E7%AD%96%E7%95%A5%E5%86%B3%E7%AD%96%EF%BC%88Decision%EF%BC%89%EF%BC%9A%E8%AF%A5%E8%B0%83%E5%93%AA%E4%B8%AA%E5%8F%82%E6%95%B0%EF%BC%9F\"><\/span>2. \u7b56\u7565\u51b3\u7b56\uff08Decision\uff09\uff1a\u8be5\u8c03\u54ea\u4e2a\u53c2\u6570\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8c03\u6574\u901a\u5e38\u6709\u4f18\u5148\u7ea7\uff0c\u4e1a\u754c\u901a\u7528\u7684<strong>\u964d\u7ea7\u7b56\u7565\uff08Degradation Preference\uff09<\/strong>\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li><strong>\u8c03\u8282\u7801\u7387 (Bitrate):<\/strong> \u6700\u5e73\u6ed1\uff0c\u4f18\u5148\u8c03\u6574\u3002<\/li>\n<li><strong>\u8c03\u8282\u5e27\u7387 (Framerate):<\/strong> \u5f53\u7801\u7387\u964d\u5230\u4e00\u5b9a\u9608\u503c\uff08\u5982\u6e05\u6670\u5ea6\u65e0\u6cd5\u63a5\u53d7\u65f6\uff09\uff0c\u5f00\u59cb\u4e22\u5e27\u3002\u4fdd\u6301\u753b\u9762\u6e05\u6670\uff0c\u4f46\u53d8\u5361\u987f\u3002<\/li>\n<li><strong>\u8c03\u8282\u5206\u8fa8\u7387 (Resolution):<\/strong> \u6700\u540e\u7684\u624b\u6bb5\u3002\u964d\u4f4e\u5206\u8fa8\u7387\u4f1a\u663e\u8457\u51cf\u5c11\u6570\u636e\u91cf\uff0c\u4f46\u753b\u9762\u53d8\u6a21\u7cca\u3002<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"3_%E7%BC%96%E7%A0%81%E6%89%A7%E8%A1%8C_Execution%EF%BC%9A%E5%A6%82%E4%BD%95%E8%90%BD%E5%9C%B0%EF%BC%9F\"><\/span>3. \u7f16\u7801\u6267\u884c (Execution)\uff1a\u5982\u4f55\u843d\u5730\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8c03\u7528\u7f16\u7801\u5668\uff08\u5982x264, MediaCodec, VideoToolbox\uff09\u7684\u63a5\u53e3\u52a8\u6001\u91cd\u7f6e\u53c2\u6570\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E4%BA%8C%E3%80%81%E4%B8%9A%E7%95%8C%E6%88%90%E7%86%9F%E6%96%B9%E6%A1%88%E8%AF%A6%E8%A7%A3\"><\/span>\u4e8c\u3001\u4e1a\u754c\u6210\u719f\u65b9\u6848\u8be6\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%E6%96%B9%E6%A1%88_A%EF%BC%9AWebRTC_%E5%AE%9E%E6%97%B6%E9%9F%B3%E8%A7%86%E9%A2%91%E6%9E%B6%E6%9E%84_%E5%A6%82_Zoom_%E6%8A%96%E9%9F%B3%E8%BF%9E%E9%BA%A6\"><\/span>\u65b9\u6848 A\uff1aWebRTC \/ \u5b9e\u65f6\u97f3\u89c6\u9891\u67b6\u6784 (\u5982 Zoom, \u6296\u97f3\u8fde\u9ea6)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8fd9\u662f\u76ee\u524d\u6700\u5148\u8fdb\u3001\u54cd\u5e94\u6700\u5feb\u7684\u65b9\u6848\uff0c\u9002\u7528\u4e8e\u4f4e\u5ef6\u8fdf\u4e92\u52a8\u76f4\u64ad\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"1_%E6%A0%B8%E5%BF%83%E7%AE%97%E6%B3%95%EF%BC%9AGCC_Google_Congestion_Control\"><\/span>1. \u6838\u5fc3\u7b97\u6cd5\uff1aGCC (Google Congestion Control)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li><strong>\u539f\u7406\uff1a<\/strong> \u7ed3\u5408\u57fa\u4e8e\u5ef6\u8fdf\uff08Trendline\u6ee4\u6ce2\u5668\uff09\u548c\u57fa\u4e8e\u4e22\u5305\u7684\u8bc4\u4f30\u5668\uff0c\u5b9e\u65f6\u8ba1\u7b97\u51fa<strong>\u76ee\u6807\u7801\u7387\uff08Target Bitrate\uff09<\/strong>\u3002<\/li>\n<li><strong>Transport-CC:<\/strong> \u63a5\u6536\u7aef\u8bb0\u5f55\u6bcf\u4e2a\u5305\u7684\u5230\u8fbe\u65f6\u95f4\uff0c\u53cd\u9988\u7ed9\u53d1\u9001\u7aef\uff0c\u53d1\u9001\u7aef\u7edf\u4e00\u8ba1\u7b97\u5e26\u5bbd\uff0c\u8fd9\u79cd\u65b9\u5f0f\u66f4\u7cbe\u51c6\u3002<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"2_%E7%BC%96%E7%A0%81%E8%B0%83%E6%95%B4%E6%89%8B%E6%AE%B5\"><\/span>2. \u7f16\u7801\u8c03\u6574\u624b\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li><strong>Simulcast (\u591a\u6d41\u53d1\u9001):<\/strong> \u5ba2\u6237\u7aef\u540c\u65f6\u7f16\u7801\u4e09\u8def\u6d41\uff08\u5927\u3001\u4e2d\u3001\u5c0f\u6d41\uff09\u3002\u5982\u679c\u5e26\u5bbd\u4e0d\u591f\uff0c\u76f4\u63a5\u505c\u6389\u5927\u6d41\uff0c\u53ea\u53d1\u4e2d\u6d41\u3002\u8fd9\u662f\u6700&#8221;\u66b4\u529b&#8221;\u4f46\u6709\u6548\u7684\u5207\u5206\u8fa8\u7387\u65b9\u6848\u3002<\/li>\n<li><strong>SVC (Scalable Video Coding, \u53ef\u4f38\u7f29\u7f16\u7801):<\/strong> \u5c06\u89c6\u9891\u7f16\u7801\u4e3a\u57fa\u7840\u5c42\u548c\u589e\u5f3a\u5c42\u3002\u7f51\u7edc\u5dee\u65f6\uff0c\u53ea\u53d1\u57fa\u7840\u5c42\uff08\u4f4e\u6e05\/\u4f4e\u5e27\u7387\uff09\uff0c\u7f51\u7edc\u597d\u65f6\u8865\u53d1\u589e\u5f3a\u5c42\u3002H.264 SVC \u6216 AV1 \u652f\u6301\u8f83\u597d\u3002<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"3_%E5%8A%A8%E6%80%81%E8%B0%83%E6%95%B4%E7%AD%96%E7%95%A5\"><\/span>3. \u52a8\u6001\u8c03\u6574\u7b56\u7565<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li><strong>\u4fdd\u753b\u8d28\u6a21\u5f0f (Maintain Resolution):<\/strong> \u4f18\u5148\u964d\u5e27\u7387\uff0c\u9002\u5408PPT\u5206\u4eab\u3001\u6559\u5b66\u573a\u666f\u3002<\/li>\n<li><strong>\u4fdd\u6d41\u7545\u6a21\u5f0f (Maintain Framerate):<\/strong> \u4f18\u5148\u964d\u5206\u8fa8\u7387\uff0c\u9002\u5408\u8fd0\u52a8\u3001\u6e38\u620f\u76f4\u64ad\u3002<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E6%96%B9%E6%A1%88_B%EF%BC%9ARTMP_SRT_%E7%A7%BB%E5%8A%A8%E7%AB%AF%E6%8E%A8%E6%B5%81_%E5%A6%82_%E5%B8%B8%E8%A7%81%E7%9A%84%E7%A7%80%E5%9C%BA%E7%9B%B4%E6%92%AD%E3%80%81%E7%94%B5%E5%95%86%E7%9B%B4%E6%92%AD\"><\/span>\u65b9\u6848 B\uff1aRTMP \/ SRT \/ \u79fb\u52a8\u7aef\u63a8\u6d41 (\u5982 \u5e38\u89c1\u7684\u79c0\u573a\u76f4\u64ad\u3001\u7535\u5546\u76f4\u64ad)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8fd9\u7c7b\u573a\u666f\u901a\u5e38\u57fa\u4e8eTCP\uff08RTMP\uff09\u6216 UDP\uff08SRT\uff09\uff0c\u7531\u4e8eRTMP\u4e0d\u652f\u6301\u4e2d\u9014\u52a8\u6001\u6539\u53d8\u5206\u8fa8\u7387\uff08\u4f1a\u5bfc\u81f4\u82b1\u5c4f\u6216\u64ad\u653e\u5668\u62a5\u9519\uff09\uff0c\u7b56\u7565\u7565\u6709\u4e0d\u540c\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"1_%E5%9F%BA%E4%BA%8E%E5%8F%91%E9%80%81%E7%BC%93%E5%86%B2%E5%8C%BA%E7%9A%84%E6%B5%81%E6%8E%A7_Sender-side_Buffer_Control\"><\/span>1. \u57fa\u4e8e\u53d1\u9001\u7f13\u51b2\u533a\u7684\u6d41\u63a7 (Sender-side Buffer Control)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8fd9\u662f\u5f88\u591a\u5f00\u6e90\u63a8\u6d41SDK\uff08\u5982LFLiveKit, OBS\uff09\u7684\u57fa\u7840\u7b56\u7565\u3002<\/p>\n<ul>\n<li><strong>\u76d1\u6d4b\uff1a<\/strong> \u6bcf\u9694 500ms \u68c0\u67e5 socket \u53d1\u9001\u7f13\u51b2\u533a\u7684\u5927\u5c0f\u3002<\/li>\n<li><strong>\u7b56\u7565\uff1a<\/strong><\/li>\n<li><em>\u9608\u503c 1:<\/em> \u7f13\u51b2\u533a\u8f7b\u5fae\u5806\u79ef -&gt; \u964d\u4f4e\u89c6\u9891\u7f16\u7801\u7801\u7387\uff08\u5982\u4ece 2Mbps \u964d\u5230 1.5Mbps\uff09\u3002<\/li>\n<li><em>\u9608\u503c 2:<\/em> \u7f13\u51b2\u533a\u4e25\u91cd\u5806\u79ef -&gt; \u4e3b\u52a8\u4e22\u5f03\u89c6\u9891\u5e27\uff08\u53ea\u4e22P\u5e27\/B\u5e27\uff0c\u4fddI\u5e27\uff09\uff0c\u4fd7\u79f0&#8221;\u4e3b\u52a8\u4e22\u5e27&#8221;\u4ee5\u817e\u51fa\u5e26\u5bbd\u3002<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"2_%E8%BD%AF%E7%BC%96%E7%A0%81%E5%99%A8%E5%8A%A8%E6%80%81%E9%85%8D%E7%BD%AE_Software_Encoder_Reconfiguration\"><\/span>2. \u8f6f\u7f16\u7801\u5668\u52a8\u6001\u914d\u7f6e (Software Encoder Reconfiguration)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u9488\u5bf9 x264\/OpenH264\uff1a<\/p>\n<ul>\n<li><strong>\u52a8\u6001\u7801\u7387:<\/strong> \u8c03\u7528 <code>x264_encoder_reconfig<\/code> \u4fee\u6539 <code>i_bitrate_tovisit<\/code>\u3002<\/li>\n<li><strong>\u52a8\u6001\u5e27\u7387:<\/strong> \u5e76\u4e0d\u76f4\u63a5\u4fee\u6539\u7f16\u7801\u5668FPS\uff0c\u800c\u662f\u901a\u8fc7<strong>\u91c7\u96c6\u7aef<\/strong>\u63a7\u5236\u3002\u4f8b\u5982\uff0c\u539f\u672c30fps\u91c7\u96c6\uff0c\u4e2d\u95f4\u62bd\u5e27\u53d8\u621015fps\u8f93\u5165\u7ed9\u7f16\u7801\u5668\uff0c\u540c\u65f6\u4fee\u6539PTS\uff08\u663e\u793a\u65f6\u95f4\u6233\uff09\uff0c\u8ba9\u7f16\u7801\u5668\u4ee5\u4e3a\u81ea\u5df1\u5728\u7f1615fps\u7684\u89c6\u9891\u3002<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"3_%E5%8D%87%E7%BB%B4%E9%99%8D%E7%BB%B4_%E5%86%B7%E5%8D%B4%E6%9C%BA%E5%88%B6_Cool-down\"><\/span>3. \u5347\u7ef4\/\u964d\u7ef4 \u51b7\u5374\u673a\u5236 (Cool-down)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u7f51\u7edc\u6ce2\u52a8\u662f\u5e38\u6001\uff0c\u4e0d\u80fd\u9891\u7e41\u8df3\u53d8\u3002<\/li>\n<li><strong>\u4e0b\u63a2\u5feb\uff1a<\/strong> \u53d1\u73b0\u7f51\u7edc\u5dee\uff0c\u7acb\u5373\u964d\u7801\u7387\uff08\u5982 3\u79d2\u5185\uff09\u3002<\/li>\n<li><strong>\u4e0a\u63a2\u6162\uff1a<\/strong> \u7f51\u7edc\u6062\u590d\u540e\uff0c\u89c2\u5bdf 10-20\u79d2\uff0c\u786e\u8ba4\u7a33\u5b9a\u540e\u518d\u9010\u6b65\u63d0\u5347\u7801\u7387\uff0c\u907f\u514d\u9707\u8361\u3002<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E4%B8%89%E3%80%81%E5%85%B7%E4%BD%93%E7%9A%84%E5%8F%82%E6%95%B0%E8%B0%83%E6%95%B4%E7%AE%97%E6%B3%95%E7%A4%BA%E4%BE%8B_%E4%BC%AA%E4%BB%A3%E7%A0%81%E9%80%BB%E8%BE%91\"><\/span>\u4e09\u3001\u5177\u4f53\u7684\u53c2\u6570\u8c03\u6574\u7b97\u6cd5\u793a\u4f8b (\u4f2a\u4ee3\u7801\u903b\u8f91)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5047\u8bbe\u5f53\u524d\u914d\u7f6e\uff1a1080P, 4Mbps, 30fps\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%8A%B6%E6%80%81%E6%9C%BA%E9%80%BB%E8%BE%91\"><\/span>\u72b6\u6001\u673a\u903b\u8f91<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1_%E6%8E%A2%E6%B5%8B%E9%98%B6%E6%AE%B5\"><\/span>1. \u63a2\u6d4b\u9636\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u5b9e\u65f6\u8ba1\u7b97 <code>Current_Bandwidth<\/code> (\u5f53\u524d\u53ef\u7528\u5e26\u5bbd)\u3002<\/li>\n<li>\u5982\u679c\u662f RTMP\uff0c\u8ba1\u7b97 <code>Buffer_Duration<\/code> (\u7f13\u51b2\u533a\u79ef\u538b\u65f6\u957f)\u3002<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"2_%E5%86%B3%E7%AD%96%E9%98%B6%E6%AE%B5\"><\/span>2. \u51b3\u7b56\u9636\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<pre><code class=\"language-python\">if Network_State == CONGESTED (\u62e5\u585e):\n    # \u6b65\u9aa41\uff1a\u964d\u7801\u7387\n    New_Bitrate = Current_Bitrate * 0.8 # \u6bcf\u6b21\u4e0b\u8c0320%\n    if New_Bitrate &lt; Min_Bitrate_1080P: # \u5982\u679c\u7801\u7387\u6491\u4e0d\u4f4f1080P\u4e86\n         # \u6b65\u9aa42\uff1a\u964d\u5e27\u7387 (\u5982\u679c\u573a\u666f\u5141\u8bb8)\n         Target_FPS = 15\n    if New_Bitrate &lt; Min_Bitrate_720P:\n         # \u6b65\u9aa43\uff1a\u964d\u5206\u8fa8\u7387 (RTMP\u614e\u7528\uff0cWebRTC\u53ef\u7528)\n         Target_Res = 540P\n\nelif Network_State == GOOD (\u826f\u597d) and Cooldown_Timer_Expired:\n    # \u7f13\u6162\u56de\u5347\n    New_Bitrate = min(Max_Bitrate, Current_Bitrate + 200kbps)\n<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"3_%E6%89%A7%E8%A1%8C%E9%98%B6%E6%AE%B5%EF%BC%88%E9%92%88%E5%AF%B9_RTMP_%E6%97%A0%E6%B3%95%E5%8A%A8%E6%80%81%E5%88%87%E5%88%86%E8%BE%A8%E7%8E%87%E7%9A%84%E5%A6%A5%E5%8D%8F%EF%BC%89\"><\/span>3. \u6267\u884c\u9636\u6bb5\uff08\u9488\u5bf9 RTMP \u65e0\u6cd5\u52a8\u6001\u5207\u5206\u8fa8\u7387\u7684\u59a5\u534f\uff09<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li><strong>Trick:<\/strong> \u5982\u679c\u5fc5\u987b\u5728 RTMP \u4e2d\u964d\u5206\u8fa8\u7387\uff0c\u901a\u5e38\u505a\u6cd5\u662f\u4fdd\u6301\u7f16\u7801\u5206\u8fa8\u7387\u4e0d\u53d8\uff08\u59821080P\uff09\uff0c\u4f46\u5b9e\u9645\u4e0a\u628a\u56fe\u50cf\u7f29\u5c0f\u8d34\u9ed1\u8fb9\uff0c\u6216\u8005\u7b80\u5355\u5730\u5fcd\u53d7\u4f4e\u7801\u7387\u5e26\u6765\u7684\u9a6c\u8d5b\u514b\uff08\u5757\u6548\u5e94\uff09\uff0c\u800c\u4e0d\u53bb\u6539\u53d8 SPS\/PPS \u4fe1\u606f\u3002<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%E5%9B%9B%E3%80%81%E8%BF%9B%E9%98%B6%EF%BC%9AAI_%E8%BE%85%E5%8A%A9%E7%9A%84%E6%99%BA%E8%83%BD%E6%B5%81%E6%8E%A7\"><\/span>\u56db\u3001\u8fdb\u9636\uff1aAI \u8f85\u52a9\u7684\u667a\u80fd\u6d41\u63a7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u73b0\u5728\u7684\u5934\u90e8\u5382\u5546\uff08\u5982\u58f0\u7f51\u3001\u817e\u8baf\u4e91\u3001\u5b57\u8282\u8df3\u52a8\uff09\u6b63\u5728\u4f7f\u7528 AI\/RL\uff08\u5f3a\u5316\u5b66\u4e60\uff09\u6765\u505a\u8c03\u6574\uff1a<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_%E5%9C%BA%E6%99%AF%E8%AF%86%E5%88%AB\"><\/span>1. \u573a\u666f\u8bc6\u522b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>AI \u8bc6\u522b\u5f53\u524d\u662f&#8221;\u4eba\u8138\u8bf4\u8bdd&#8221;\uff08\u9759\u6001\uff09\u8fd8\u662f&#8221;\u6e38\u620f\u6253\u6597&#8221;\uff08\u52a8\u6001\uff09\u3002\u5982\u679c\u662f\u9759\u6001\uff0c\u5927\u529b\u964d\u5e27\u7387\u7701\u5e26\u5bbd\uff1b\u5982\u679c\u662f\u52a8\u6001\uff0c\u4f18\u5148\u4fdd\u5e27\u7387\u964d\u753b\u8d28\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_%E7%BD%91%E7%BB%9C%E9%A2%84%E6%B5%8B\"><\/span>2. \u7f51\u7edc\u9884\u6d4b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f7f\u7528 LSTM \u6216 Transformer \u6a21\u578b\u6839\u636e\u8fc7\u53bb 10\u79d2\u7684\u7f51\u7edc\u6296\u52a8\uff0c\u9884\u6d4b\u672a\u6765 5\u79d2\u7684\u5e26\u5bbd\uff0c\u63d0\u524d\u8c03\u6574\uff0c\u800c\u4e0d\u662f\u7b49\u5230\u4e22\u5305\u4e86\u518d\u8c03\u6574\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_ROI_%E7%BC%96%E7%A0%81_Region_of_Interest\"><\/span>3. ROI \u7f16\u7801 (Region of Interest)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7f51\u7edc\u5dee\u65f6\uff0c\u628a\u7801\u7387\u5168\u90e8\u5206\u914d\u7ed9\u4eba\u8138\u533a\u57df\uff0c\u80cc\u666f\u6781\u5ea6\u6a21\u7cca\u3002\u8fd9\u662f\u4e00\u79cd&#8221;\u611f\u5b98\u4e0a&#8221;\u7684\u53c2\u6570\u8c03\u6574\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E6%80%BB%E7%BB%93%E5%BB%BA%E8%AE%AE\"><\/span>\u603b\u7ed3\u5efa\u8bae<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5982\u679c\u4f60\u9700\u8981\u81ea\u5df1\u5b9e\u73b0\u4e00\u5957\u65b9\u6848\uff1a<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E8%B5%B7%E6%AD%A5%E9%98%B6%E6%AE%B5\"><\/span>\u8d77\u6b65\u9636\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u57fa\u4e8e<strong>\u53d1\u9001\u7f13\u51b2\u533a\u5806\u79ef\u7387<\/strong>\uff0c\u53ea\u52a8\u6001\u8c03\u6574<strong>\u7801\u7387\uff08Bitrate\uff09<\/strong>\u3002\u8fd9\u662f\u6700\u5b89\u5168\u3001\u517c\u5bb9\u6027\u6700\u597d\u7684\u65b9\u5f0f\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E8%BF%9B%E9%98%B6%E9%98%B6%E6%AE%B5\"><\/span>\u8fdb\u9636\u9636\u6bb5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5f15\u5165\u4e22\u5e27\u903b\u8f91\uff08Drop Frames\uff09\uff0c\u5728\u5e94\u7528\u5c42\u4e22\u5f03P\u5e27\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E9%AB%98%E9%98%B6%E9%98%B6%E6%AE%B5%EF%BC%88WebRTC%EF%BC%89\"><\/span>\u9ad8\u9636\u9636\u6bb5\uff08WebRTC\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u79fb\u690d GCC \u7b97\u6cd5\uff0c\u5b9e\u73b0\u7cbe\u51c6\u7684\u5e26\u5bbd\u4f30\u8ba1\uff0c\u5e76\u7ed3\u5408 Simulcast \u505a\u5206\u8fa8\u7387\u5207\u6362\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f31\u7f51\u5bf9\u6297\u6280\u672f\u65b9\u6848 \u6982\u8ff0 \u5728\u76f4\u64ad\u573a\u666f\u4e2d\uff0c\u6839\u636e\u7f51\u7edc\u60c5\u51b5\u52a8\u6001\u8c03\u6574\u7f16\u7801\u53c2\u6570\uff08\u5373\u5f31\u7f51\u5bf9\u6297\u6216\u81ea\u9002\u5e94\u7801\u7387\/QoS\u7b56\u7565\uff09\u662f\u4fdd\u8bc1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"blocksy_meta":[],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"post_excerpt_stackable":"<p>\u76ee\u5f55 Toggle \u5f31\u7f51\u5bf9\u6297\u6280\u672f\u65b9\u6848\u6982\u8ff0\u4e00\u3001\u6838\u5fc3\u903b\u8f91\u95ed\u73af1. \u7f51\u7edc\u63a2\u6d4b\uff08Sensing\uff09\uff1a\u600e\u4e48\u77e5\u9053\u7f51\u7edc\u53d8\u5dee\u4e86\uff1f2. \u7b56\u7565\u51b3\u7b56\uff08Decision\uff09\uff1a\u8be5\u8c03\u54ea\u4e2a\u53c2\u6570\uff1f3. \u7f16\u7801\u6267\u884c (Execution)\uff1a&hellip;<\/p>\n","category_list":"<a href=\"https:\/\/www.v.ixriver.com\/?cat=28\" rel=\"category\">\u89c6\u9891<\/a>","author_info":{"name":"admin","url":"https:\/\/www.v.ixriver.com\/?author=1"},"comments_num":"0 comments","_links":{"self":[{"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=\/wp\/v2\/posts\/786"}],"collection":[{"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=786"}],"version-history":[{"count":0,"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=\/wp\/v2\/posts\/786\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.v.ixriver.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}