{"id":7948,"date":"2022-12-12T15:39:01","date_gmt":"2022-12-12T07:39:01","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948"},"modified":"2024-01-10T16:20:27","modified_gmt":"2024-01-10T08:20:27","slug":"%e9%9f%b3%e8%a7%86%e9%a2%91%e5%9f%ba%e7%a1%802-h264%e7%bc%96%e7%a0%81","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948","title":{"rendered":"\u97f3\u89c6\u9891\u57fa\u78402-H264\u7f16\u7801"},"content":{"rendered":"<p><a href=\"https:\/\/www.jianshu.com\/p\/219e01b9252d\">https:\/\/www.jianshu.com\/p\/219e01b9252d<\/a><\/p>\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/516506635\">https:\/\/zhuanlan.zhihu.com\/p\/516506635<\/a><\/p>\n<p><a href=\"https:\/\/www.zhihu.com\/question\/381527055\/answer\/2788317082\">https:\/\/www.zhihu.com\/question\/381527055\/answer\/2788317082<\/a><\/p>\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/578518804\">https:\/\/zhuanlan.zhihu.com\/p\/578518804<\/a><\/p>\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/574205874\">https:\/\/zhuanlan.zhihu.com\/p\/574205874<\/a> (\u6e05\u6670)<br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/500538442\">https:\/\/zhuanlan.zhihu.com\/p\/500538442<\/a> (\u5168)<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#%E8%A7%86%E9%A2%91%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E7%BC%96%E7%A0%81%EF%BC%88%E5%8E%8B%E7%BC%A9%EF%BC%89\" title=\"\u89c6\u9891\u4e3a\u4ec0\u4e48\u8981\u7f16\u7801\uff08\u538b\u7f29\uff09\">\u89c6\u9891\u4e3a\u4ec0\u4e48\u8981\u7f16\u7801\uff08\u538b\u7f29\uff09<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#%E6%A6%82%E5%BF%B5\" title=\"\u6982\u5ff5\">\u6982\u5ff5<\/a><ul class=\"ez-toc-list-level-4\"><li class=\"ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#%E4%B8%80%E3%80%81%E5%9F%BA%E6%9C%AC%E6%A6%82%E5%BF%B5\" title=\"\u4e00\u3001\u57fa\u672c\u6982\u5ff5\">\u4e00\u3001\u57fa\u672c\u6982\u5ff5<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#%E4%BA%8C%E3%80%81%E5%8E%8B%E7%BC%A9%E6%96%B9%E5%BC%8F\" title=\"\u4e8c\u3001\u538b\u7f29\u65b9\u5f0f\">\u4e8c\u3001\u538b\u7f29\u65b9\u5f0f<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#%E4%B8%89%E3%80%81%E7%A0%81%E6%B5%81%E7%BB%93%E6%9E%84\" title=\"\u4e09\u3001\u7801\u6d41\u7ed3\u6784\">\u4e09\u3001\u7801\u6d41\u7ed3\u6784<\/a><ul class=\"ez-toc-list-level-5\"><li class=\"ez-toc-heading-level-5\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#1%E7%A0%81%E6%B5%81%E5%88%86%E5%B1%82\" title=\"1.\u7801\u6d41\u5206\u5c42\">1.\u7801\u6d41\u5206\u5c42<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-5\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#2NAL%E5%8D%95%E5%85%83%EF%BC%88NALU%EF%BC%89\" title=\"2.NAL\u5355\u5143\uff08NALU\uff09\">2.NAL\u5355\u5143\uff08NALU\uff09<\/a><ul class=\"ez-toc-list-level-6\"><li class=\"ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#1%EF%BC%89NALU%E7%9A%84%E6%A0%BC%E5%BC%8F%E4%B8%8E%E5%88%86%E5%B1%82\" title=\"1\uff09NALU\u7684\u683c\u5f0f\u4e0e\u5206\u5c42\">1\uff09NALU\u7684\u683c\u5f0f\u4e0e\u5206\u5c42<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#startcode\" title=\"startcode\">startcode<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-10\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#NALU%E6%A0%BC%E5%BC%8F\" title=\"NALU\u683c\u5f0f\">NALU\u683c\u5f0f<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-11\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#NALU%E5%88%86%E5%B1%82%E7%BB%93%E6%9E%84\" title=\"NALU\u5206\u5c42\u7ed3\u6784\">NALU\u5206\u5c42\u7ed3\u6784<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-12\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#2%EF%BC%89NALU%E8%AF%A6%E8%A7%A3\" title=\"2\uff09NALU\u8be6\u89e3\">2\uff09NALU\u8be6\u89e3<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-13\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#NALU%E5%A4%B4%E7%BB%93%E6%9E%84\" title=\"NALU\u5934\u7ed3\u6784\">NALU\u5934\u7ed3\u6784<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-14\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#SODB%E3%80%81RBSP%E5%92%8CEBSP%E7%9A%84%E5%9F%BA%E6%9C%AC%E6%A6%82%E5%BF%B5\" title=\"SODB\u3001RBSP\u548cEBSP\u7684\u57fa\u672c\u6982\u5ff5\">SODB\u3001RBSP\u548cEBSP\u7684\u57fa\u672c\u6982\u5ff5<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-15\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#NALU%E7%B1%BB%E5%9E%8B\" title=\"NALU\u7c7b\u578b\">NALU\u7c7b\u578b<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-6\"><a class=\"ez-toc-link ez-toc-heading-16\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#NALU%E5%86%B7%E9%97%A8%E7%9F%A5%E8%AF%86\" title=\"NALU\u51b7\u95e8\u77e5\u8bc6\">NALU\u51b7\u95e8\u77e5\u8bc6<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-5\"><a class=\"ez-toc-link ez-toc-heading-17\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#3NALU%E8%A7%A3%E7%A0%81%E8%BF%87%E7%A8%8B\" title=\"3.NALU\u89e3\u7801\u8fc7\u7a0b\">3.NALU\u89e3\u7801\u8fc7\u7a0b<\/a><\/li><\/ul><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-18\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=7948\/#H264%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3\" title=\"H264\u5b98\u65b9\u6587\u6863\">H264\u5b98\u65b9\u6587\u6863<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"%E8%A7%86%E9%A2%91%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E7%BC%96%E7%A0%81%EF%BC%88%E5%8E%8B%E7%BC%A9%EF%BC%89\"><\/span>\u89c6\u9891\u4e3a\u4ec0\u4e48\u8981\u7f16\u7801\uff08\u538b\u7f29\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/563045067\">https:\/\/zhuanlan.zhihu.com\/p\/563045067<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%A6%82%E5%BF%B5\"><\/span>\u6982\u5ff5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"%E4%B8%80%E3%80%81%E5%9F%BA%E6%9C%AC%E6%A6%82%E5%BF%B5\"><\/span>\u4e00\u3001\u57fa\u672c\u6982\u5ff5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u5e8f\u5217<\/li>\n<li>\u5e27\u7c7b\u578b<br \/>\nI\/P\/B\/IDR<\/li>\n<li>GOP(\u5e27\u7ec4)<br \/>\n\u4e24\u4e2aI\u5e27\u4e4b\u95f4\u662f\u4e00\u4e2a\u56fe\u50cf\u5e8f\u5217\uff0c\u5728\u4e00\u4e2a\u56fe\u50cf\u5e8f\u5217\u4e2d\u53ea\u6709\u4e00\u4e2aI\u5e27\u3002<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/v2-4775fcb00da15ce77a9dd4e31f9f3a5d_r.jpg\" alt=\"\" \/><\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"%E4%BA%8C%E3%80%81%E5%8E%8B%E7%BC%A9%E6%96%B9%E5%BC%8F\"><\/span>\u4e8c\u3001\u538b\u7f29\u65b9\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u5e27\u5185\u538b\u7f29\uff08\u6d88\u9664\u7a7a\u95f4\u5197\u4f59\uff09<br \/>\n\u6709\u635f\u538b\u7f29\u6280\u672f<\/li>\n<li>\u5e27\u95f4\u538b\u7f29 (\u6d88\u9664\u65f6\u95f4\u5197\u4f59)<\/li>\n<li>DCT<br \/>\n\u6574\u6570\u79bb\u6563\u4f59\u5f26\u53d8\u6362\uff08DCT\uff09\uff0c\u5c06\u7a7a\u95f4\u4e0a\u7684\u76f8\u5173\u6027\u53d8\u4e3a\u9891\u57df\u4e0a\u65e0\u5173\u7684\u6570\u636e\u7136\u540e\u8fdb\u884c\u91cf\u5316\u3002<\/li>\n<li>CABAC\u538b\u7f29<br \/>\n\u65e0\u635f\u538b\u7f29\u6280\u672f<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"%E4%B8%89%E3%80%81%E7%A0%81%E6%B5%81%E7%BB%93%E6%9E%84\"><\/span>\u4e09\u3001\u7801\u6d41\u7ed3\u6784<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/blog.csdn.net\/m0_68918744\/article\/details\/123907744\">https:\/\/blog.csdn.net\/m0_68918744\/article\/details\/123907744<\/a><\/p>\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/516506635\">https:\/\/zhuanlan.zhihu.com\/p\/516506635<\/a><br \/>\n<a href=\"https:\/\/blog.csdn.net\/weixin_41422027\/article\/details\/101768023\">https:\/\/blog.csdn.net\/weixin_41422027\/article\/details\/101768023<\/a><br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/485677873\">https:\/\/zhuanlan.zhihu.com\/p\/485677873<\/a><br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/559580191\">https:\/\/zhuanlan.zhihu.com\/p\/559580191<\/a><br \/>\n<a href=\"https:\/\/www.cnblogs.com\/linuxAndMcu\/p\/14533228.html\">https:\/\/www.cnblogs.com\/linuxAndMcu\/p\/14533228.html<\/a><\/p>\n<p>H264\u7801\u6d41\u7ec4\u6210\uff0c\u4ece\u5927\u5230\u5c0f\u6392\u5e8f\u4f9d\u6b21\u662f:<\/p>\n<blockquote>\n<p>H264\u89c6\u9891\u5e8f\u5217\u3001\u56fe\u50cf\u3001\u7247\u7ec4\u3001\u7247\u3001NALU\u3001\u5b8f\u5757\u3001\u50cf\u7d20\u3002<\/p>\n<\/blockquote>\n<p>H.264\u7684\u57fa\u672c\u6d41\uff08elementary stream\uff09\u5c31\u662f\u4e00\u7cfb\u5217NALU\u7684\u96c6\u5408<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/aHR0cHM6Ly9tbWJpei5xcGljLmNuL21tYml6X3BuZy9MTUREaWFWaWF3M0tMb2FFUEY0eWFKY1NNMDNyaWIycHNiR25nYWlhZnNKMm9Xb0lVeXRkUFc0RUh5MDhrRUJiQXZNajlWaWI2MUNOcGhlSGljVVl4OVRsVTlTZy82NDA.png\" alt=\"\" \/><\/p>\n<p><img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/53A64C22-5802-459f-813E-3D1F5BDE9FB8.png\" alt=\"\" \/><\/p>\n<h5><span class=\"ez-toc-section\" id=\"1%E7%A0%81%E6%B5%81%E5%88%86%E5%B1%82\"><\/span>1.\u7801\u6d41\u5206\u5c42<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p><a href=\"https:\/\/blog.csdn.net\/Poisx\/article\/details\/121726566\">https:\/\/blog.csdn.net\/Poisx\/article\/details\/121726566<\/a><br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/654901998\">https:\/\/zhuanlan.zhihu.com\/p\/654901998<\/a><br \/>\n<a href=\"https:\/\/blog.csdn.net\/ET_Endeavoring\/article\/details\/129812378\">https:\/\/blog.csdn.net\/ET_Endeavoring\/article\/details\/129812378<\/a><\/p>\n<ul>\n<li>\n<p>NAL\u5206\u5c42<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/h264_stream.png\" alt=\"\" \/><\/p>\n<\/li>\n<li>\n<p>Slice\u53ca\u5b8f\u5757\u5206\u5c42<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/slice.png\" alt=\"\" \/><\/p>\n<\/li>\n<li>\n<p>\u89c6\u9891\u5e8f\u5217\u7684\u53ef\u89c6\u5316\u8868\u8fbe<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/video_frames.png\" alt=\"\" \/><\/p>\n<\/li>\n<\/ul>\n<h5><span class=\"ez-toc-section\" id=\"2NAL%E5%8D%95%E5%85%83%EF%BC%88NALU%EF%BC%89\"><\/span>2.NAL\u5355\u5143\uff08NALU\uff09<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p><a href=\"https:\/\/blog.csdn.net\/u014415274\/article\/details\/124103377\">https:\/\/blog.csdn.net\/u014415274\/article\/details\/124103377<\/a> \uff08\u5341\u5206\u8be6\u7ec6\uff09<br \/>\n<a href=\"https:\/\/blog.csdn.net\/qq_35703954\/article\/details\/84595484\">https:\/\/blog.csdn.net\/qq_35703954\/article\/details\/84595484<\/a><\/p>\n<h6><span class=\"ez-toc-section\" id=\"1%EF%BC%89NALU%E7%9A%84%E6%A0%BC%E5%BC%8F%E4%B8%8E%E5%88%86%E5%B1%82\"><\/span>1\uff09NALU\u7684\u683c\u5f0f\u4e0e\u5206\u5c42<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p>NALU\u6d41\u7684\u683c\u5f0f\u4e3astart_code+NALU_unit<\/p>\n<blockquote>\n<h6><span class=\"ez-toc-section\" id=\"startcode\"><\/span>startcode<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<\/blockquote>\n<p><a href=\"https:\/\/cloud.tencent.com\/developer\/article\/2020422\">https:\/\/cloud.tencent.com\/developer\/article\/2020422<\/a><\/p>\n<p>start_code:NALU\u7684\u8d77\u59cb\u7801\u4e3a0x000001\u62160x00000001\uff08\u8d77\u59cb\u7801\u5305\u62ec\u4e24\u79cd\uff1a3 \u5b57\u8282(0x000001) \u548c 4 \u5b57\u8282(0x00000001)\uff0c\u5728 SPS\u3001PPS \u548c Access Unit \u7684\u7b2c\u4e00\u4e2a NALU \u4f7f\u7528 4 \u5b57\u8282\u8d77\u59cb\u7801\uff0c\u5176\u4f59\u60c5\u51b5\u5747\u4f7f\u7528 3 \u5b57\u8282\u8d77\u59cb\u7801\u3002\uff09<\/p>\n<blockquote>\n<h6><span class=\"ez-toc-section\" id=\"NALU%E6%A0%BC%E5%BC%8F\"><\/span>NALU\u683c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<\/blockquote>\n<pre><code class=\"language-bash\">\u4e00\u4e2aNALU=\u4e00\u7ec4\u5bf9\u5e94\u89c6\u9891\u7f16\u7801\u7684NALU\u5934\u90e8\u4fe1\u606f + \u4e00\u4e2a\u539f\u59cb\u5b57\u8282\u5e8f\u5217\u8d1f\u8377\uff08RBSP,RAW Byte Sequence Paload\uff09\n\u4e00\u4e2a\u539f\u59cb\u7684NALU\u5355\u5143\u7ed3\u6784\u5305\u542b\uff1a\n[NALU head] + [NALU payload]\u4e09\u90e8\u5206\uff0c\u5176\u4e2dstart code\u662f\u4e00\u4e2aNALU\u5355\u5143\u5f00\u59cb\uff0c\u7528\u6765\u5206\u5272\u5404\u4e2aNALU.<\/code><\/pre>\n<p>NALU\u683c\u5f0f\uff1a<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/fb2f3d7b11fa44d2beec6b6fa829344f.png\" alt=\"\" \/><\/p>\n<p><strong>\u5355\u5143\u7684\u4fe1\u606f\u5934\uff08\u4e00\u4e2a\u5b57\u8282\uff09\u5b9a\u4e49\u4e86RBSP\u5355\u5143\u7684\u7c7b\u578b\uff0cNAL\u5355\u5143\u5176\u4f59\u90e8\u5206\u4e3aRBSP\u6570\u636e\u3002<\/strong><\/p>\n<blockquote>\n<h6><span class=\"ez-toc-section\" id=\"NALU%E5%88%86%E5%B1%82%E7%BB%93%E6%9E%84\"><\/span>NALU\u5206\u5c42\u7ed3\u6784<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<\/blockquote>\n<p>\u6ce8\u610f\u8fd9\u91cc\u662f\u6309\u7167<strong>\u529f\u80fd<\/strong>\u5206\u5c42\uff0c\u5e76\u975e\u6846\u67b6\u5206\u5c42\u3002<\/p>\n<ul>\n<li>\n<p><strong>\u89c6\u9891\u7f16\u7801\u5c42<\/strong>\uff08VCL\u5373Video Coding Layer\uff09:\u8d1f\u8d23\u9ad8\u6548\u7684\u89c6\u9891\u5185\u5bb9\u8868\u793a,\u8fd9\u662f\u6838\u5fc3\u7b97\u6cd5\u5f15\u64ce\uff0c\u5176\u4e2d\u5bf9<strong>\u5b8f\u5757\u3001\u7247<\/strong>\u7684\u5904\u7406\u90fd\u5305\u542b\u5728\u8fd9\u4e2a\u5c42\u7ea7\u4e0a\uff0c\u5b83\u8f93\u51fa\u7684\u6570\u636e\u662fSODB;<\/p>\n<\/li>\n<li>\n<p><strong>\u7f51\u7edc\u9002\u914d\u5c42<\/strong>\uff08NAL\u5373Network Abstraction Layer\uff09:\u4ee5\u7f51\u7edc\u6240\u8981\u6c42\u7684\u6070\u5f53\u65b9\u5f0f\u5bf9\u6570\u636e\u8fdb\u884c\u6253\u5305\u548c\u53d1\u9001\uff0c\u6bd4\u8f83\u7b80\u5355\uff0c\u5148\u62a5VCL\u5410\u51fa\u6765\u7684\u6570\u636eSODB\u8fdb\u884c\u5b57\u8282\u5bf9\u9f50\uff0c\u5f62\u6210RBSP\uff0c\u6700\u540e\u518dRBSP\u6570\u636e\u524d\u9762\u52a0\u4e0aNAL\u5934\u5219\u7ec4\u6210\u4e00\u4e2aNALU\u5355\u5143\u3002<\/p>\n<\/li>\n<\/ul>\n<p>NALU\u5206\u5c42\u76ee\u7684\uff1aVCL\u53ea\u8d1f\u8d23\u89c6\u9891\u7684\u4fe1\u53f7\u5904\u7406\uff0c\u5305\u542b\u538b\u7f29\uff0c\u91cf\u5316\u7b49\u5904\u7406\uff0cNAL\u89e3\u51b3\u7f16\u7801\u540e\u6570\u636e\u7684\u7f51\u7edc\u4f20\u8f93\uff0c\u8fd9\u6837\u53ef\u4ee5\u5c06VCL\u548cNAL\u7684\u5904\u7406\u653e\u5230\u4e0d\u540c\u5e73\u53f0\u6765\u5904\u7406\uff0c\u53ef\u4ee5\u51cf\u5c11\u56e0\u4e3a\u7f51\u7edc\u73af\u5883\u4e0d\u540c\u5bf9VCL\u7684\u6bd4\u7279\u6d41\u8fdb\u884c\u91cd\u6784\u548c\u91cd\u7f16\u7801\uff1b<\/p>\n<h6><span class=\"ez-toc-section\" id=\"2%EF%BC%89NALU%E8%AF%A6%E8%A7%A3\"><\/span>2\uff09NALU\u8be6\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<blockquote>\n<h6><span class=\"ez-toc-section\" id=\"NALU%E5%A4%B4%E7%BB%93%E6%9E%84\"><\/span>NALU\u5934\u7ed3\u6784<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<\/blockquote>\n<p>NALU\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u5373\u4e3aNALU\u7c7b\u578b\uff0c\u5c06\u5176\u8f6c\u4e3a\u4e8c\u8fdb\u5236\u6570\u636e\u540e\uff0c\u89e3\u8bfb\u987a\u5e8f\u4ece\u5de6\u5f80\u53f3\u7b97\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\">\u7b2c1\u4f4d\u4e3a\u7981\u6b62\u4f4d\uff0c\u503c\u4e3a1\u8868\u793a\u8bed\u6cd5\u9519\u8bef\n\u7b2c2,3\u4f4d\u4e3a\u53c2\u8003\u7ea7\u522b\n\u7b2c4-8\u4f4d\u662fNAL\u5355\u5143\u7c7b\u578b\u3002<\/code><\/pre>\n<p><img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/nalu_header.png\" alt=\"\" \/><\/p>\n<pre><code class=\"language-bash\">264\u5e38\u89c1\u7684\u5e27\u5934\u6570\u636e\u4e3a\uff1a\n\n00 00 00 01 67 (SPS)        67\u7684\u4e8c\u8fdb\u5236\u8868\u793a\uff1a0110 0111\n\n00 00 00 01 68 (PPS)        68\u7684\u4e8c\u8fdb\u5236\u8868\u793a\uff1a0110 1000\n\n00 00 00 01 65 ( IDR \u5e27)    65\u7684\u4e8c\u8fdb\u5236\u8868\u793a\uff1a0110 0101\n\n00 00 00 01 61 (P\u5e27)        61\u7684\u4e8c\u8fdb\u5236\u8868\u793a\uff1a0110 0001<\/code><\/pre>\n<blockquote>\n<h6><span class=\"ez-toc-section\" id=\"SODB%E3%80%81RBSP%E5%92%8CEBSP%E7%9A%84%E5%9F%BA%E6%9C%AC%E6%A6%82%E5%BF%B5\"><\/span>SODB\u3001RBSP\u548cEBSP\u7684\u57fa\u672c\u6982\u5ff5<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><a href=\"https:\/\/www.jianshu.com\/p\/5f89ea2c3a28\">https:\/\/www.jianshu.com\/p\/5f89ea2c3a28<\/a> \uff08*\uff09<br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/547358971\">https:\/\/zhuanlan.zhihu.com\/p\/547358971<\/a><br \/>\nSODB\uff1a\u6570\u636e\u6bd4\u7279\u4e32\uff0c\u5373\u7f16\u7801\u540e\u7684\u6700\u539f\u59cb\u7684\u6570\u636e\uff1b<\/p>\n<\/blockquote>\n<p>RBSP\uff1a\u539f\u59cb\u5b57\u8282\u5e8f\u5217\u8f7d\u8377\uff0c\u5373\u5728SODB\u7684\u540e\u9762\u6dfb\u52a0\u4e86trailing bits\uff0c\u5373\u4e00\u4e2abit 1\u548c\u82e5\u5e72\u4e2abit 0\uff0c\u4ee5\u4fbf\u5b57\u8282<strong>\u5bf9\u9f50<\/strong>\uff1b<\/p>\n<p>EBSP\uff1a\u6269\u5c55\u5b57\u8282\u5e8f\u5217\u8f7d\u8377\uff0c\u5373\u5728RBSP\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u4e86\u4eff\u6821\u9a8c\u5b57\u82820x03. \uff08\u5c31\u662f\u9632\u6b62NALU\u7684RBSP\u4e2d\u670900 00 00 01\u8fd9\u6837\u4e0e\u8d77\u59cb\u7801\u51b2\u7a81\u7684\u5b57\u8282\uff09<\/p>\n<p>\u4e09\u8005\u8054\u7cfb:SODB-&gt;RBSP-&gt;EBSP<br \/>\nSODB\u662f\u7f16\u7801\u6536\u7684\u539f\u59cb\u6570\u636e\uff0c\u7ecf\u8fc7\u5c01\u88c5\u540e\u4e3aRBSP\uff0cRBSP\u662fNAL\u5355\u5143\u7684\u6570\u636e\u90e8\u5206\u7684\u5c01\u88c5\u683c\u5f0f\u3002\u5728NAL\u5185\u90e8\u4e3a\u4e86\u9632\u6b62\u4e0e\u8d77\u59cb\u7801\u7ade\u4e89\uff0c\u4ece\u800c\u5f15\u5165\u586b\u5145\u5b57\u82820x03\uff0c\u8fd9\u6837\u4fbf\u5f62\u6210\u4e86EBSP\u3002<\/p>\n<blockquote>\n<h6><span class=\"ez-toc-section\" id=\"NALU%E7%B1%BB%E5%9E%8B\"><\/span>NALU\u7c7b\u578b<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<\/blockquote>\n<p>\u901a\u5e38\u60c5\u51b5\u6211\u4eec\u770b\u5230\u7684NLAU\u7c7b\u578b\u5c31\u662fSPS(7)\u3001PPS(8)\u3001SEI\u3001IDR\u7684slice(5)\u3001\u975eIDR\u8fd9\u51e0\u79cd\u3002<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/12\/NAL_TYPE.png\" alt=\"\" \/><\/p>\n<ul>\n<li>sps\u4e0epps<br \/>\n<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/588403821\">https:\/\/zhuanlan.zhihu.com\/p\/588403821<\/a><br \/>\n\u4e00\u822c\u60c5\u51b5 SPS \u548c PPS \u7684 NAL Unit \u901a\u5e38\u4f4d\u4e8e\u6574\u4e2a\u7801\u6d41\u7684\u8d77\u59cb\u4f4d\u7f6e\u3002 \u5c01\u88c5\u6587\u4ef6\u4e00\u822c\u8fdb\u4fdd\u5b58\u4e00\u6b21\uff0c\u4f4d\u4e8e\u6587\u4ef6\u5934\u90e8\uff0c SPS\/PPS \u5728\u6574\u4e2a\u89e3\u7801\u8fc7\u7a0b\u4e2d\u590d\u7528\uff0c\u4e0d\u53d1\u751f\u53d8\u5316\u3002 \u7136\u800c\u5bf9\u4e8e\u5b9e\u65f6\u6d41\uff0c\u901a\u5e38\u662f\u4ece\u6d41\u4e2d\u95f4\u5f00\u59cb\u89e3\u7801\uff0c\u56e0\u6b64\u9700\u8981\u5728\u6bcf\u4e2a I\u5e27 \u524d\u6dfb\u52a0 SPS \u548c PPS \uff1b \u5982\u679c\u7f16\u7801\u5668\u5728\u7f16\u7801\u8fc7\u7a0b\u4e2d\u6539\u53d8\u4e86\u7801\u6d41\u53c2\u6570\uff08\u5982\u5206\u8fa8\u7387\uff09\uff0c\u9700\u8981\u91cd\u65b0\u8c03\u6574 SPS \u548c PPS \u6570\u636e\u3002<\/li>\n<\/ul>\n<h6><span class=\"ez-toc-section\" id=\"NALU%E5%86%B7%E9%97%A8%E7%9F%A5%E8%AF%86\"><\/span>NALU\u51b7\u95e8\u77e5\u8bc6<span class=\"ez-toc-section-end\"><\/span><\/h6>\n<p><a href=\"https:\/\/blog.csdn.net\/MACMACip\/article\/details\/106761092\">https:\/\/blog.csdn.net\/MACMACip\/article\/details\/106761092<\/a><\/p>\n<h5><span class=\"ez-toc-section\" id=\"3NALU%E8%A7%A3%E7%A0%81%E8%BF%87%E7%A8%8B\"><\/span>3.NALU\u89e3\u7801\u8fc7\u7a0b<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<p><a href=\"https:\/\/blog.csdn.net\/weixin_39399492\/article\/details\/133165018\">https:\/\/blog.csdn.net\/weixin_39399492\/article\/details\/133165018<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"H264%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3\"><\/span>H264\u5b98\u65b9\u6587\u6863<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5982\u4f55\u770b\u61c2\u5b98\u65b9\u6587\u6863\uff1a<a href=\"https:\/\/www.cnblogs.com\/jyfyonghu\/p\/10486071.html\">https:\/\/www.cnblogs.com\/jyfyonghu\/p\/10486071.html<\/a><\/p>\n<p>\u53e5\u6cd5\u5143\u7d20\uff1a<a href=\"https:\/\/blog.csdn.net\/xiaojun111111\/article\/details\/40107559\">https:\/\/blog.csdn.net\/xiaojun111111\/article\/details\/40107559<\/a><\/p>\n<button class=\"simplefavorite-button\" data-postid=\"7948\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>https:\/\/www.jianshu.com\/p\/219e01b9252d https:\/\/zhu [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[666],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7948"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7948"}],"version-history":[{"count":64,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7948\/revisions"}],"predecessor-version":[{"id":11349,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/7948\/revisions\/11349"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7948"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7948"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7948"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}