{"id":3617,"date":"2025-11-28T14:22:31","date_gmt":"2025-11-28T06:22:31","guid":{"rendered":"http:\/\/www.51cos.com\/?p=3617"},"modified":"2025-11-28T14:22:31","modified_gmt":"2025-11-28T06:22:31","slug":"v4l2rtspserver%e6%ba%90%e4%bb%a3%e7%a0%81%e9%98%85%e8%af%bb%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"http:\/\/www.51cos.com\/?p=3617","title":{"rendered":"v4l2rtspserver\u6e90\u4ee3\u7801\u9605\u8bfb\u5206\u6790"},"content":{"rendered":"<p>\u9605\u8bfb\u5e76\u5206\u6790\u4e86 main.cpp \u548c inc\/V4l2RTSPServer.h \u7684\u4ee3\u7801\u3002\u4ee5\u4e0b\u662f\u5173\u4e8e\u60a8\u95ee\u9898\u7684\u603b\u7ed3\uff1a<\/p>\n<ol>\n<li>main.cpp\uff1a\u53c2\u6570\u89e3\u6790\u4e0e\u521d\u59cb\u5316\n<p>main.cpp \u662f\u6574\u4e2a\u7a0b\u5e8f\u7684\u5165\u53e3\u70b9\uff0c\u5176\u6838\u5fc3\u804c\u8d23\u662f\u89e3\u6790\u547d\u4ee4\u884c\u53c2\u6570\uff0c\u5e76\u6839\u636e\u8fd9\u4e9b\u53c2\u6570\u6765\u914d\u7f6e\u548c\u542f\u52a8 RTSP \u670d\u52a1\u3002<\/p>\n<p>\u53c2\u6570\u89e3\u6790\uff1a<\/p>\n<ul>\n<li>\u5de5\u5177\uff1a \u4ee3\u7801\u4f7f\u7528\u6807\u51c6\u7684 C \u5e93\u51fd\u6570 getopt() \u5728\u4e00\u4e2a while \u5faa\u73af\u4e2d\u6765\u89e3\u6790\u547d\u4ee4\u884c\u542f\u52a8\u53c2\u6570\u3002<\/li>\n<li>\u903b\u8f91\uff1a switch (c) \u7ed3\u6784\u6839\u636e\u4e0d\u540c\u7684\u53c2\u6570\u9009\u9879\uff08\u5982 -P \u7528\u4e8e RTSP \u7aef\u53e3\uff0c-F \u7528\u4e8e\u5e27\u7387\uff0c-W\/-H \u7528\u4e8e\u5206\u8fa8\u7387\uff09\u6765\u7ed9\u76f8\u5e94\u7684\u53d8\u91cf\u8d4b\u503c\u3002<\/li>\n<li>\u9ed8\u8ba4\u503c\uff1a \u5728\u53c2\u6570\u89e3\u6790\u4e4b\u524d\uff0c\u4ee3\u7801\u4e3a\u6240\u6709\u53ef\u914d\u7f6e\u9879\u8bbe\u7f6e\u4e86\u5408\u7406\u7684\u9ed8\u8ba4\u503c\uff08\u4f8b\u5982\uff0cRTSP \u7aef\u53e3\u9ed8\u8ba4\u4e3a 8554\uff0c\u8bbe\u5907\u9ed8\u8ba4\u4e3a \/dev\/video0\uff09\u3002<\/li>\n<li>\u5e2e\u52a9\u4fe1\u606f\uff1a \u5982\u679c\u7528\u6237\u63d0\u4f9b\u4e86 -h \u53c2\u6570\uff0c\u7a0b\u5e8f\u4f1a\u6253\u5370\u51fa\u6240\u6709\u652f\u6301\u7684\u53c2\u6570\u53ca\u5176\u8be6\u7ec6\u8bf4\u660e\uff0c\u7136\u540e\u9000\u51fa\u3002<\/li>\n<\/ul>\n<p>\u521d\u59cb\u5316\u914d\u7f6e\u6d41\u7a0b\uff1a<\/p>\n<ol>\n<li>\u521b\u5efa RTSP \u670d\u52a1\u5668\uff1a \u9996\u5148\u5b9e\u4f8b\u5316\u4e00\u4e2a V4l2RTSPServer \u5bf9\u8c61\uff0c\u5c06\u89e3\u6790\u5230\u7684\u7aef\u53e3\u3001\u8d85\u65f6\u65f6\u95f4\u3001HLS \u8bbe\u7f6e\u3001\u7528\u6237\u8ba4\u8bc1\u4fe1\u606f\u7b49\u6838\u5fc3\u53c2\u6570\u4f20\u9012\u7ed9\u5b83\u3002<\/li>\n<li>\u904d\u5386\u8bbe\u5907\uff1a \u7a0b\u5e8f\u652f\u6301\u540c\u65f6\u4ece\u591a\u4e2a\u8bbe\u5907\u8fdb\u884c\u6d41\u5f0f\u4f20\u8f93\u3002\u5b83\u4f1a\u904d\u5386\u6240\u6709\u6307\u5b9a\u7684\u8bbe\u5907\uff08\u4f8b\u5982 \/dev\/video0, \/dev\/video1\uff09\u3002<\/li>\n<li>\u521b\u5efa\u89c6\u9891\/\u97f3\u9891\u6e90\uff1a<\/li>\n<\/ol>\n<ul>\n<li>\u5bf9\u4e8e\u6bcf\u4e2a\u89c6\u9891\u8bbe\u5907\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a V4l2Capture \u5b9e\u4f8b\uff0c\u5e76\u6839\u636e\u5206\u8fa8\u7387\u3001\u5e27\u7387\u548c\u50cf\u7d20\u683c\u5f0f\u7b49\u53c2\u6570\u5bf9\u5176\u8fdb\u884c\u914d\u7f6e\u3002<\/li>\n<li>\u5982\u679c\u7f16\u8bd1\u65f6\u542f\u7528\u4e86 ALSA (HAVE_ALSA) \u5e76\u4e14\u6307\u5b9a\u4e86\u97f3\u9891\u8bbe\u5907\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a ALSACapture \u5b9e\u4f8b\u6765\u6355\u83b7\u97f3\u9891\u3002\n<ol start=\"4\">\n<li>\u521b\u5efa\u5a92\u4f53\u4f1a\u8bdd (Session)\uff1a<\/li>\n<\/ol>\n<\/li>\n<li>\u4f7f\u7528 DeviceSourceFactory \u4e3a\u6bcf\u4e2a\u89c6\u9891\u6216\u97f3\u9891\u6355\u83b7\u5668\u521b\u5efa\u4e00\u4e2a StreamReplicator\u3002\u8fd9\u4e2a StreamReplicator \u8d1f\u8d23\u4ece\u786c\u4ef6\u8bbe\u5907\u4e2d\u6293\u53d6\u6570\u636e\u5e76\u51c6\u5907\u597d\u7528\u4e8e\u6d41\u5f0f\u4f20\u8f93\u3002<\/li>\n<li>\u6839\u636e\u7528\u6237\u7684\u53c2\u6570\uff08\u4f8b\u5982 -u for unicast, -m for multicast\uff09\uff0c\u7a0b\u5e8f\u4f1a\u521b\u5efa\u4e0d\u540c\u7c7b\u578b\u7684 ServerMediaSubsession\uff08\u5982 UnicastServerMediaSubsession,<br \/>\n MulticastServerMediaSubsession, TSServerMediaSubsession\uff09\u3002\u8fd9\u4e9b &#8220;sub-sessions&#8221; \u4ee3\u8868\u4e86\u4e00\u4e2a\u5a92\u4f53\u6d41\uff08\u5982 H.264 \u89c6\u9891\u6d41\u6216 AAC \u97f3\u9891\u6d41\uff09\u3002<\/li>\n<li>\u6700\u540e\uff0c\u5c06\u8fd9\u4e9b sub-sessions \u6dfb\u52a0\u5230 V4l2RTSPServer \u5b9e\u4f8b\u4e2d\uff0c\u5e76\u4e3a\u5b83\u4eec\u5206\u914d\u4e00\u4e2a\u552f\u4e00\u7684 URL \u8def\u5f84\u3002\n<ol start=\"5\">\n<li>\u542f\u52a8\u4e8b\u4ef6\u5faa\u73af\uff1a \u6240\u6709\u8bbe\u5907\u548c\u4f1a\u8bdd\u90fd\u914d\u7f6e\u5b8c\u6bd5\u540e\uff0c\u8c03\u7528 rtspServer.eventLoop(&amp;quit);\uff0c\u8fd9\u5c06\u542f\u52a8 Live555 \u7684\u4e8b\u4ef6\u5904\u7406\u5faa\u73af\uff0c\u7a0b\u5e8f\u8fdb\u5165\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u72b6\u6001\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<hr \/>\n<ol start=\"2\">\n<li>V4l2RTSPServer.h\uff1a\u5bf9 Live555 \u7684\u5c01\u88c5\n<p>V4l2RTSPServer.h \u5b9a\u4e49\u4e86 V4l2RTSPServer \u7c7b\uff0c\u8fd9\u4e2a\u7c7b\u662f\u5bf9 Live555 \u5e93\u6838\u5fc3\u529f\u80fd\u7684\u4e00\u4e2a\u9ad8\u7ea7\u5c01\u88c5\uff0c\u76ee\u7684\u662f\u7b80\u5316 RTSP \u670d\u52a1\u5668\u7684\u521b\u5efa\u548c\u7ba1\u7406\u3002<\/p>\n<p>\u5b83\u4e3b\u8981\u5c01\u88c5\u4e86\u4ee5\u4e0b Live555 \u7684\u6838\u5fc3\u7c7b\u548c\u529f\u80fd\uff1a<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li><code>UsageEnvironment<\/code> (\u6210\u5458\u53d8\u91cf <code>m_env<\/code>): \u8fd9\u662f Live555 \u7684\u57fa\u7840\u73af\u5883\u7c7b\u3002V4l2RTSPServer \u5728\u6784\u9020\u51fd\u6570\u4e2d\u901a\u8fc7 BasicUsageEnvironment::createNew(&#8230;)<br \/>\n \u521b\u5efa\u5b83\u3002UsageEnvironment \u5305\u542b\u4e86\u4efb\u52a1\u8c03\u5ea6\u5668\uff0c\u5e76\u7ba1\u7406\u7740\u670d\u52a1\u5668\u8fd0\u884c\u6240\u9700\u7684\u6240\u6709\u72b6\u6001\u3002<\/li>\n<li><code>TaskScheduler<\/code>: \u4efb\u52a1\u8c03\u5ea6\u5668\u662f Live555 \u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b\u7684\u6838\u5fc3\u3002V4l2RTSPServer \u901a\u8fc7 m_env->taskScheduler() \u83b7\u53d6\u5b83\uff0c\u5e76\u901a\u8fc7\u8c03\u7528\u5176 doEventLoop()<br \/>\n \u65b9\u6cd5\u6765\u542f\u52a8\u4e8b\u4ef6\u5faa\u73af\uff0c\u4ece\u800c\u5904\u7406\u7f51\u7edc\u8fde\u63a5\u3001\u6570\u636e\u8bfb\u5199\u7b49\u6240\u6709\u5f02\u6b65\u4e8b\u4ef6\u3002<\/li>\n<li><code>RTSPServer<\/code> (\u6210\u5458\u53d8\u91cf <code>m_rtspServer<\/code>): \u8fd9\u662f Live555 \u7684 RTSP \u670d\u52a1\u5668\u4e3b\u7c7b\u3002V4l2RTSPServer \u901a\u8fc7 HTTPServer::createNew(&#8230;) \u6765\u521b\u5efa\u5b83\uff08HTTPServer<br \/>\n \u662f\u4e00\u4e2a\u7ee7\u627f\u81ea RTSPServer \u7684\u81ea\u5b9a\u4e49\u7c7b\uff0c\u589e\u52a0\u4e86\u5bf9 HTTP \u96a7\u9053\u7684\u652f\u6301\uff09\u3002\u5b83\u8d1f\u8d23\u76d1\u542c\u6307\u5b9a\u7684\u7aef\u53e3\uff0c\u5904\u7406\u6765\u81ea\u5ba2\u6237\u7aef\u7684 RTSP \u8bf7\u6c42\uff08\u5982 DESCRIBE, SETUP, PLAY\uff09\u3002<\/li>\n<li><code>ServerMediaSession<\/code>: \u5728 addSession \u65b9\u6cd5\u4e2d\uff0c\u6b64\u7c7b\u7528\u4e8e\u8868\u793a\u4e00\u4e2a\u5b8c\u6574\u7684\u5a92\u4f53\u4f1a\u8bdd\uff0c\u5b83\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u5a92\u4f53\u5b50\u4f1a\u8bdd\uff08\u4f8b\u5982\uff0c\u4e00\u4e2a\u89c6\u9891\u6d41\u548c\u4e00\u4e2a\u97f3\u9891\u6d41\uff09\u3002<\/li>\n<li><code>ServerMediaSubsession<\/code>: V4l2RTSPServer \u5e76\u4e0d\u76f4\u63a5\u521b\u5efa\u5b50\u4f1a\u8bdd\uff0c\u800c\u662f\u63d0\u4f9b addSession \u63a5\u53e3\uff0c\u8ba9 main.cpp \u4e2d\u521b\u5efa\u7684\u5404\u79cd\u5b50\u4f1a\u8bdd\uff08UnicastServerMediaSubsession<br \/>\n \u7b49\uff09\u53ef\u4ee5\u88ab\u6dfb\u52a0\u8fdb\u6765\u3002<\/li>\n<li>\n<p><code>UserAuthenticationDatabase<\/code>: V4l2RTSPServer \u5185\u90e8\u4f7f\u7528\u8fd9\u4e2a\u7c7b\u6765\u7ba1\u7406\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u4e3a RTSP \u6d41\u63d0\u4f9b\u8bbf\u95ee\u63a7\u5236\u3002<\/p>\n<p>\u603b\u7ed3\u6765\u8bf4\uff0cV4l2RTSPServer \u7c7b\u626e\u6f14\u4e86\u4e00\u4e2a\u201c\u7ecf\u7406\u201d\u7684\u89d2\u8272\u3002\u5b83\u9690\u85cf\u4e86 Live555 \u5e93\u4e2d\u5bf9\u8c61\uff08\u5982 UsageEnvironment,<br \/>\nRTSPServer\uff09\u7684\u590d\u6742\u521d\u59cb\u5316\u548c\u5173\u8054\u8fc7\u7a0b\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u5957\u7b80\u6d01\u7684\u63a5\u53e3\uff08\u5982 addSession, eventLoop\uff09\uff0c\u8ba9 main.cpp \u53ef\u4ee5\u66f4\u65b9\u4fbf\u5730\u5b9a\u4e49\u6d41\u5a92\u4f53\u5185\u5bb9\u5e76\u542f\u52a8\u670d\u52a1\u5668\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u9605\u8bfb\u5e76\u5206\u6790\u4e86 H264_V4l2DeviceSource.h \u548c H264_V4l2DeviceSource.cpp\u3002\u8fd9\u4e24\u4e2a\u6587\u4ef6\u5b9a\u4e49\u4e86\u5c06 V4L2 \u8bbe\u5907\u6355\u83b7\u7684 H.264 \u88f8\u6d41\uff08byte-stream\uff09\u9002\u914d\u5230 Live555<br \/>\n  \u6846\u67b6\u7684\u6838\u5fc3\u903b\u8f91\u3002<\/p>\n<p>\u5176\u5b9e\u73b0\u975e\u5e38\u7cbe\u5de7\uff0c\u91c7\u7528\u4e86\u7ee7\u627f\u548c\u865a\u51fd\u6570\u7684\u65b9\u5f0f\u5c06\u901a\u7528\u903b\u8f91\u548c\u7279\u5b9a\u683c\u5f0f\u7684\u89e3\u6790\u903b\u8f91\u89e3\u8026\u3002\u4e0b\u9762\u662f\u8be6\u7ec6\u7684\u89e3\u91ca\uff1a<\/p>\n<ol>\n<li>\u7ee7\u627f\u4f53\u7cfb\u4e0e\u804c\u8d23\u5212\u5206\n<p>\u9996\u5148\uff0c\u8fd9\u4e2a\u7c7b\u7684\u7ee7\u627f\u5173\u7cfb\u662f\u7406\u89e3\u5176\u5de5\u4f5c\u65b9\u5f0f\u7684\u5173\u952e\uff1a<br \/>\nH264_V4l2DeviceSource -> H26X_V4l2DeviceSource -> V4L2DeviceSource -> FramedSource (Live555)<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li><code>FramedSource<\/code> (Live555)\uff1a\u8fd9\u662f Live555 \u4e2d\u6240\u6709\u201c\u5e27\u5316\u201d\u6570\u636e\u6e90\u7684\u57fa\u7c7b\u3002\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u201c\u62c9\u201d\uff08pull\uff09\u6a21\u578b\u63a5\u53e3\uff0c\u6838\u5fc3\u662f\u865a\u51fd\u6570 doGetNextFrame()\u3002Live555 \u7684 RTPSink<br \/>\n \u901a\u8fc7\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u6765\u8bf7\u6c42\u4e0b\u4e00\u4e2a\u6570\u636e\u5e27\uff08\u5728\u8fd9\u91cc\uff0c\u4e00\u4e2a\u201c\u5e27\u201d\u5c31\u662f\u4e00\u4e2a NALU\uff09\u3002<\/li>\n<li><code>V4L2DeviceSource<\/code>\uff1a\u8fd9\u4e2a\u57fa\u7c7b\uff08\u4ee3\u7801\u672a\u5728\u6b64\u5c55\u793a\uff0c\u4f46\u4ece\u7ed3\u6784\u53ef\u77e5\uff09\u8d1f\u8d23\u5904\u7406\u4e0e V4L2 \u8bbe\u5907\u7684\u901a\u7528\u4ea4\u4e92\u3002\u5b83\u5b9e\u73b0\u4e86 doGetNextFrame() \u7684\u4e3b\u4f53\u903b\u8f91\uff0c\u7ba1\u7406\u4e00\u4e2a\u5e27\u961f\u5217\uff0c\u5e76\u4ece<br \/>\n V4L2 \u6355\u83b7\u8bbe\u5907\u8bfb\u53d6\u4e00\u6574\u5757\u6570\u636e\uff08\u8fd9\u4e00\u6574\u5757\u6570\u636e\u53ef\u80fd\u5305\u542b\u591a\u4e2a NALU\uff09\u3002\u5f53\u5b83\u4ece\u8bbe\u5907\u8bfb\u5230\u4e00\u5757\u6570\u636e\u540e\uff0c\u4f1a\u8c03\u7528\u4e00\u4e2a\u865a\u51fd\u6570 splitFrames() \u6765\u8fdb\u884c\u7279\u5b9a\u683c\u5f0f\u7684\u89e3\u6790\u3002<\/li>\n<li><code>H26X_V4l2DeviceSource<\/code>\uff1a\u8fd9\u662f\u4e00\u4e2a\u4e2d\u95f4\u57fa\u7c7b\uff0c\u5b9e\u73b0\u4e86 H.264 \u548c H.265 NALU \u89e3\u6790\u7684\u901a\u7528\u51fd\u6570 extractFrame()\u3002<\/li>\n<li>\n<p><code>H264_V4l2DeviceSource<\/code>\uff1a\u8fd9\u662f\u6700\u7ec8\u7684\u5b9e\u73b0\u7c7b\u3002\u5b83\u53ea\u505a\u4e00\u4ef6\u4e8b\uff1a\u91cd\u5199\uff08override\uff09splitFrames() \u65b9\u6cd5\uff0c\u63d0\u4f9b H.264 \u683c\u5f0f\u7684\u4e13\u5c5e\u89e3\u6790\u903b\u8f91\u3002<\/p>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u4f7f\u5f97 V4L2DeviceSource \u65e0\u9700\u5173\u5fc3\u89c6\u9891\u7684\u5177\u4f53\u7f16\u7801\u683c\u5f0f\uff0c\u800c H264_V4l2DeviceSource \u5219\u53ea\u9700\u4e13\u6ce8\u4e8e\u5982\u4f55\u4ece\u4e00\u4e2a\u539f\u59cb\u6570\u636e\u5757\u4e2d\u5206\u79bb\u51fa H.264 NALU\uff0c\u804c\u8d23\u975e\u5e38\u6e05\u6670\u3002<\/p>\n<ol start=\"2\">\n<li>H.264 NALU \u7684\u63d0\u53d6\u4e0e\u5c01\u88c5\u8fc7\u7a0b<\/li>\n<\/ol>\n<p>V4L2 \u9a71\u52a8\u901a\u5e38\u4f1a\u8f93\u51fa\u4e00\u4e2a\u8fde\u7eed\u7684 H.264 \u5b57\u8282\u6d41\uff0c\u5176\u4e2d\u5305\u542b\u7531\u201c\u8d77\u59cb\u7801\u201d\uff08Start Code\uff09\u5206\u9694\u7684\u591a\u4e2a NALU\u3002H264_V4l2DeviceSource<br \/>\n\u7684\u6838\u5fc3\u4efb\u52a1\u5c31\u662f\u5c06\u8fd9\u4e2a\u5b57\u8282\u6d41\u5207\u5206\u6210\u4e00\u4e2a\u4e2a\u72ec\u7acb\u7684 NALU\uff0c\u5e76\u4ea4\u7ed9 Live555\u3002<\/p>\n<p>\u8fd9\u4e2a\u8fc7\u7a0b\u5728 splitFrames() \u548c extractFrame() \u65b9\u6cd5\u4e2d\u5b9e\u73b0\uff1a<\/p>\n<p>extractFrame() &#8211; \u67e5\u627e\u5355\u4e2a NALU<br \/>\n\u8fd9\u4e2a\u51fd\u6570\u662f\u5b9e\u9645\u7684\u201c\u626b\u63cf\u5668\u201d\u3002<\/p>\n<\/li>\n<\/ul>\n<ol>\n<li>\u8f93\u5165\uff1a\u4e00\u4e2a\u6307\u5411\u6570\u636e\u7f13\u51b2\u533a\u7684\u6307\u9488 frame \u548c\u7f13\u51b2\u533a\u5927\u5c0f size\u3002<\/li>\n<li>\u67e5\u627e\u8d77\u59cb\u7801\uff1a\u5b83\u4f7f\u7528 memmem() \u51fd\u6570\u5728\u7f13\u51b2\u533a\u4e2d\u641c\u7d22 H.264 \u7684\u8d77\u59cb\u7801\uff080x000001 \u6216 0x00000001\uff09\u3002<\/li>\n<li>\u786e\u5b9a NALU \u8fb9\u754c\uff1a\n<ul>\n<li>\u4e00\u65e6\u627e\u5230\u4e00\u4e2a\u8d77\u59cb\u7801\uff0c\u5b83\u5c31\u5c06\u5f53\u524d\u4f4d\u7f6e\u6807\u8bb0\u4e3a NALU \u7684\u5f00\u59cb\u3002<\/li>\n<li>\u7136\u540e\uff0c\u5b83\u4ece\u5f53\u524d\u4f4d\u7f6e\u4e4b\u540e\u7ee7\u7eed\u641c\u7d22\u4e0b\u4e00\u4e2a\u8d77\u59cb\u7801\u3002<\/li>\n<li>\u4e0b\u4e00\u4e2a\u8d77\u59cb\u7801\u7684\u4f4d\u7f6e\u5c31\u662f\u5f53\u524d NALU \u7684\u7ed3\u675f\u4f4d\u7f6e\u3002<\/li>\n<li>\u5982\u679c\u627e\u4e0d\u5230\u4e0b\u4e00\u4e2a\u8d77\u59cb\u7801\uff0c\u5219\u8ba4\u4e3a\u5f53\u524d NALU \u4e00\u76f4\u6301\u7eed\u5230\u7f13\u51b2\u533a\u7684\u672b\u5c3e\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8f93\u51fa\uff1a\u5b83\u8fd4\u56de\u4e00\u4e2a\u6307\u5411 NALU \u6570\u636e\u5f00\u59cb\u4f4d\u7f6e\u7684\u6307\u9488 outFrame \u548c\u8be5 NALU \u7684\u957f\u5ea6 outsize\u3002<\/p>\n<p>splitFrames() &#8211; \u5faa\u73af\u89e3\u6790\u4e0e\u5904\u7406<br \/>\n\u8fd9\u4e2a\u51fd\u6570\u662f NALU \u7684\u201c\u5904\u7406\u5668\u201d\u3002<\/p>\n<\/li>\n<li>\u5b83\u5728\u4e00\u4e2a while \u5faa\u73af\u4e2d\u53cd\u590d\u8c03\u7528 extractFrame()\uff0c\u76f4\u5230\u6574\u4e2a\u6570\u636e\u5757\u88ab\u626b\u63cf\u5b8c\u6bd5\u3002<\/li>\n<li>\u6bcf\u5f53 extractFrame() \u8fd4\u56de\u4e00\u4e2a\u6709\u6548\u7684 NALU\uff0csplitFrames() \u5c31\u4f1a\u68c0\u67e5\u8fd9\u4e2a NALU \u7684\u7c7b\u578b\uff08\u901a\u8fc7 NALU Header \u7684\u7b2c1\u4e2a\u5b57\u8282\uff09\u3002<\/li>\n<li>\u5904\u7406 SPS \u548c PPS\uff1a\n<ul>\n<li>\u5982\u679c NALU \u7c7b\u578b\u662f SPS (Sequence Parameter Set) \u6216 PPS (Picture Parameter Set)\uff0c\u5b83\u4f1a\u5c06\u5176\u5185\u5bb9\u5206\u522b\u7f13\u5b58\u5230\u6210\u5458\u53d8\u91cf m_sps \u548c m_pps \u4e2d\u3002<\/li>\n<li>\u540c\u65f6\uff0c\u5b83\u4f1a\u4f7f\u7528 Base64 \u5bf9 SPS\/PPS \u8fdb\u884c\u7f16\u7801\uff0c\u5e76\u751f\u6210 sprop-parameter-sets \u5b57\u7b26\u4e32\uff0c\u8fd9\u662f RTSP \u534f\u8bae\u4e2d SDP \u63cf\u8ff0\u6240\u5fc5\u9700\u7684\uff0c\u7528\u4e8e\u544a\u77e5\u5ba2\u6237\u7aef\u89e3\u7801\u5668\u521d\u59cb\u5316\u53c2\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\u5904\u7406 IDR \u5e27\uff1a\n<ul>\n<li>\u5982\u679c NALU \u7c7b\u578b\u662f IDR \u5e27\uff08\u5173\u952e\u5e27\uff09\uff0c\u5e76\u4e14 m_repeatConfig \u9009\u9879\u4e3a\u771f\uff0c\u5b83\u4f1a\u5728\u8fd9\u4e2a IDR \u5e27\u4e4b\u524d\uff0c\u5148\u5c06\u7f13\u5b58\u7684 SPS \u548c PPS \u6dfb\u52a0\u5230\u8981\u53d1\u9001\u7684\u5e27\u5217\u8868\u4e2d\u3002<\/li>\n<li>\u8fd9\u4e00\u70b9\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u4fdd\u8bc1\u4e86\u4efb\u4f55\u65f6\u5019\u52a0\u5165\u6d41\u5a92\u4f53\u7684\u5ba2\u6237\u7aef\u90fd\u80fd\u5728\u6536\u5230\u7b2c\u4e00\u4e2a\u5173\u952e\u5e27\u65f6\u83b7\u5f97\u5fc5\u8981\u7684\u89e3\u7801\u914d\u7f6e\u4fe1\u606f\uff0c\u4ece\u800c\u80fd\u7acb\u5373\u5f00\u59cb\u6b63\u786e\u89e3\u7801\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6784\u5efa\u5e27\u5217\u8868\uff1a\u6240\u6709\u63d0\u53d6\u51fa\u7684 NALU\uff08\u5305\u62ec\u989d\u5916\u6dfb\u52a0\u7684 SPS\/PPS\uff09\u7684\u6307\u9488\u548c\u5927\u5c0f\u88ab\u5b58\u5165\u4e00\u4e2a std::list \u5e76\u8fd4\u56de\u3002<\/p>\n<p>\u603b\u7ed3\uff1a\u5982\u4f55\u8fde\u63a5\u5230 Live555<\/p>\n<p>\u6574\u4e2a\u6d41\u7a0b\u5982\u4e0b\uff1a<\/p>\n<\/li>\n<li>Live555 \u7684 RTPSink \u9700\u8981\u6570\u636e\uff0c\u4e8e\u662f\u8c03\u7528 H264_V4l2DeviceSource \u7684 doGetNextFrame() \u65b9\u6cd5\u3002<\/li>\n<li>doGetNextFrame() \u68c0\u67e5\u5176\u5185\u90e8\u961f\u5217\u662f\u5426\u6709\u5df2\u7ecf\u89e3\u6790\u597d\u7684 NALU\u3002<\/li>\n<li>\u5982\u679c\u6ca1\u6709\uff0c\u5b83\u4fbf\u4ece V4L2 \u8bbe\u5907\u8bfb\u53d6\u4e00\u5927\u5757\u539f\u59cb\u6570\u636e\uff0c\u7136\u540e\u8c03\u7528\u88ab\u91cd\u5199\u7684 splitFrames() \u65b9\u6cd5\u3002<\/li>\n<li>splitFrames() \u5c06\u8fd9\u5757\u6570\u636e\u5207\u5272\u6210\u4e00\u4e2a NALU \u5217\u8868\uff0c\u5e76\u8fd4\u56de\u7ed9 doGetNextFrame()\u3002<\/li>\n<li>doGetNextFrame() \u5c06\u8fd9\u4e2a NALU \u5217\u8868\u5b58\u5165\u81ea\u5df1\u7684\u5185\u90e8\u961f\u5217\u3002<\/li>\n<li>\u73b0\u5728\u961f\u5217\u4e2d\u6709\u4e86\u6570\u636e\uff0cdoGetNextFrame() \u53d6\u51fa\u961f\u5217\u4e2d\u7684\u7b2c\u4e00\u4e2a NALU\uff0c\u5c06\u5176\u6570\u636e\u548c\u65f6\u95f4\u6233\u590d\u5236\u5230 Live555 \u63d0\u4f9b\u7684\u7f13\u51b2\u533a\u4e2d\uff0c\u7136\u540e\u901a\u8fc7 afterGetting() \u901a\u77e5<br \/>\n  Live555\uff1a\u201c\u6211\u5df2\u51c6\u5907\u597d\u4e00\u5e27\uff08\u4e00\u4e2a NALU\uff09\u201d\u3002<\/li>\n<li>\n<p>Live555 \u62ff\u5230\u8fd9\u4e2a NALU\uff0c\u5c06\u5176\u6253\u5305\u6210 RTP \u5305\u5e76\u53d1\u9001\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0cH264_V4l2DeviceSource \u5b8c\u7f8e\u5730\u626e\u6f14\u4e86\u9002\u914d\u5668\u7684\u89d2\u8272\uff0c\u5c06 V4L2 \u8bbe\u5907\u7684 H.264 \u5b57\u8282\u6d41\u8f6c\u6362\u6210\u4e86 Live555 \u6846\u67b6\u80fd\u591f\u7406\u89e3\u548c\u5904\u7406\u7684\u3001\u4ee5 NALU \u4e3a\u5355\u4f4d\u7684\u201c\u5e27\u201d\u5e8f\u5217\u3002<\/p>\n<ol>\n<li>\u7f13\u51b2\u533a\/\u5e27\u961f\u5217\u673a\u5236<\/li>\n<\/ol>\n<p>\u662f\u7684\uff0c\u4ee3\u7801\u4e2d\u5b58\u5728\u4e00\u4e2a\u663e\u5f0f\u7684\u5e27\u961f\u5217\u3002<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>\n<p>\u5b9e\u73b0\u65b9\u5f0f\uff1a\u5728 inc\/DeviceSource.h \u6587\u4ef6\u7684 V4L2DeviceSource \u7c7b\u5b9a\u4e49\u4e2d\uff0c\u6709\u4e00\u4e2a\u6210\u5458\u53d8\u91cf\uff1a<br \/>\n1     std::list&lt;Frame*> m_captureQueue;<br \/>\n  \u8fd9\u4e2a std::list \u5c31\u662f\u7528\u6765\u7f13\u5b58\u4ece V4L2 \u8bbe\u5907\u8bfb\u53d6\u5e76\u89e3\u6790\u540e\u7684\u89c6\u9891\u5e27\uff08NALU\uff09\u7684\u961f\u5217\u3002\u961f\u5217\u4e2d\u5b58\u50a8\u7684\u662f\u6307\u5411 Frame \u5bf9\u8c61\u7684\u6307\u9488\uff0c\u8be5\u7ed3\u6784\u4f53\u5c01\u88c5\u4e86\u5e27\u6570\u636e\u3001\u5927\u5c0f\u548c\u65f6\u95f4\u6233\u3002<\/p>\n<\/li>\n<li>\n<p>\u5927\u5c0f\/\u6df1\u5ea6\u786e\u5b9a\uff1a<\/p>\n<ul>\n<li>V4L2DeviceSource \u7c7b\u4e2d\u8fd8\u6709\u4e00\u4e2a\u6210\u5458\u53d8\u91cf unsigned int m_queueSize;\uff0c\u5b83\u51b3\u5b9a\u4e86\u4e0a\u8ff0\u961f\u5217\u7684\u6700\u5927\u6df1\u5ea6\u3002<\/li>\n<li>\u8fd9\u4e2a m_queueSize \u7684\u503c\u662f\u5728 V4L2DeviceSource \u7684\u6784\u9020\u51fd\u6570\u4e2d\u8bbe\u7f6e\u7684\uff0c\u5176\u503c\u6765\u81ea\u4e8e main.cpp \u4e2d\u4f20\u9012\u7684 queueSize \u53c2\u6570\u3002<\/li>\n<li>\u8fd9\u4e2a queueSize \u53c2\u6570\u53ef\u4ee5\u901a\u8fc7\u547d\u4ee4\u884c\u7684 -Q \u9009\u9879\u8fdb\u884c\u914d\u7f6e\uff0c\u9ed8\u8ba4\u503c\u4e3a 10\u3002<\/li>\n<li>\u5728 src\/DeviceSource.cpp \u7684 queueFrame() \u65b9\u6cd5\u4e2d\uff0c\u6709\u660e\u786e\u7684\u961f\u5217\u7ba1\u7406\u903b\u8f91\uff1a\u5728\u5411\u961f\u5217\u4e2d\u6dfb\u52a0\u65b0\u5e27\u4e4b\u524d\uff0c\u4f1a\u68c0\u67e5\u961f\u5217\u5927\u5c0f\u3002\u5982\u679c m_captureQueue.size() >=<br \/>\n m_queueSize\uff0c\u7a0b\u5e8f\u4f1a\u8ba4\u4e3a\u961f\u5217\u5df2\u6ee1\uff0c\u5e76\u4e22\u5f03\u961f\u5217\u4e2d\u6700\u65e7\u7684\u4e00\u5e27\uff0c\u4ee5\u9632\u6b62\u5185\u5b58\u65e0\u9650\u5236\u589e\u957f\u3002<\/li>\n<\/ul>\n<ol start=\"2\">\n<li>Live555 \u8c03\u5ea6\u4e0e\u5e27\u8bfb\u53d6\u65f6\u673a<\/li>\n<\/ol>\n<p>DeviceSource \u7c7b\u5de7\u5999\u5730\u5229\u7528\u4e86 Live555<br \/>\n\u7684\u8c03\u5ea6\u673a\u5236\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e24\u79cd\u5de5\u4f5c\u6a21\u5f0f\uff08\u7ebf\u7a0b\u6a21\u5f0f\u548c\u975e\u7ebf\u7a0b\u6a21\u5f0f\uff09\uff0c\u4ee5\u51b3\u5b9a\u4f55\u65f6\u8bfb\u53d6\u548c\u4ea4\u4ed8\u5e27\u3002\u8fd9\u4e24\u79cd\u6a21\u5f0f\u90fd\u9075\u5faa\u4e00\u4e2a\u6838\u5fc3\u7684\u751f\u4ea7\u8005-\u6d88\u8d39\u8005\u6a21\u578b\uff0c\u5176\u4e2d m_captureQueue<br \/>\n\u662f\u6570\u636e\u4ea4\u6362\u7684\u4e2d\u5fc3\u3002<\/p>\n<p>\u751f\u4ea7\u8005\uff08\u8bfb\u53d6\u5e27\uff09\uff1a\u8d1f\u8d23\u4ece V4L2 \u8bbe\u5907\u8bfb\u53d6\u6570\u636e\uff0c\u89e3\u6790\u6210 NALU\uff0c\u7136\u540e\u653e\u5165 m_captureQueue\u3002<br \/>\n\u6d88\u8d39\u8005\uff08\u4ea4\u4ed8\u5e27\uff09\uff1a\u8d1f\u8d23\u4ece m_captureQueue \u53d6\u51fa NALU\uff0c\u7136\u540e\u901a\u8fc7 Live555 \u7684 afterGetting() \u4ea4\u4ed8\u7ed9 RTP \u5c01\u88c5\u5668\u3002<\/p>\n<p>\u8fd9\u4e24\u79cd\u6a21\u5f0f\u7531 main.cpp \u4e2d\u7684 useThread \u53d8\u91cf\uff08\u53ef\u901a\u8fc7 -s \u547d\u4ee4\u884c\u5f00\u5173\u63a7\u5236\uff09\u51b3\u5b9a\u3002<\/p>\n<p>\u6a21\u5f0f\u4e00\uff1a\u4f7f\u7528\u72ec\u7acb\u7ebf\u7a0b (useThread = true\uff0c\u9ed8\u8ba4\u6a21\u5f0f)<\/p>\n<\/li>\n<\/ul>\n<ol>\n<li>\u542f\u52a8\uff1aV4L2DeviceSource \u7684\u6784\u9020\u51fd\u6570\u4f1a\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684 pthread \u7ebf\u7a0b\uff0c\u8be5\u7ebf\u7a0b\u6267\u884c V4L2DeviceSource::thread() \u65b9\u6cd5\u3002<\/li>\n<li>\u8bfb\u53d6\u65f6\u673a\uff1a\u5728 thread() \u65b9\u6cd5\u4e2d\uff0c\u7a0b\u5e8f\u4f7f\u7528 select() \u7cfb\u7edf\u8c03\u7528\u6765\u963b\u585e\u5f0f\u5730\u7b49\u5f85 V4L2 \u8bbe\u5907\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u53d8\u4e3a\u201c\u53ef\u8bfb\u201d\u72b6\u6001\u3002\u8fd9\u610f\u5473\u7740\u4e00\u65e6 V4L2<br \/>\n  \u9a71\u52a8\u51c6\u5907\u597d\u4e86\u65b0\u7684\u4e00\u5e27\u6570\u636e\uff0c<code>select()<\/code> \u5c31\u4f1a\u7acb\u5373\u8fd4\u56de\u3002<\/li>\n<li>\u89e6\u53d1\u4ea4\u4ed8\uff1aselect() \u8fd4\u56de\u540e\uff0c\u7ebf\u7a0b\u4f1a\u8c03\u7528 getNextFrame() -> processFrame() -> queueFrame()\u3002\u5728 queueFrame() \u65b9\u6cd5\u7684\u6700\u540e\uff0c\u5b83\u4f1a\u6267\u884c\u4ee5\u4e0b\u5173\u952e\u4ee3\u7801\uff1a<br \/>\n1     envir().taskScheduler().triggerEvent(m_eventTriggerId, this);<br \/>\n  \u8fd9\u884c\u4ee3\u7801\u7684\u4f5c\u7528\u662f\u5411 Live555 \u7684\u4e3b\u4e8b\u4ef6\u5faa\u73af\uff08Task Scheduler\uff09\u53d1\u9001\u4e00\u4e2a\u4e8b\u4ef6\u901a\u77e5\uff0c\u544a\u8bc9\u5b83\uff1a\u201c\u563f\uff0c\u6211\u521a\u521a\u5728\u961f\u5217\u91cc\u653e\u4e86\u65b0\u4e1c\u897f\uff01\u201d<\/li>\n<li>\n<p>\u4ea4\u4ed8\uff1aLive555 \u7684\u4e3b\u5faa\u73af\u5728\u6536\u5230\u8fd9\u4e2a\u4e8b\u4ef6\u540e\uff0c\u4f1a\u8c03\u7528 V4L2DeviceSource::deliverFrame() \u65b9\u6cd5\u3002\u6b64\u65b9\u6cd5\u4ece m_captureQueue \u4e2d\u53d6\u51fa\u5e27\u5e76\u4ea4\u4ed8\u3002<\/p>\n<p>\u6a21\u5f0f\u4e8c\uff1a\u4f7f\u7528 Live555 \u5185\u7f6e\u8c03\u5ea6 (useThread = false)<\/p>\n<\/li>\n<li>\n<p>\u542f\u52a8\uff1a\u6784\u9020\u51fd\u6570\u4e0d\u521b\u5efa\u72ec\u7acb\u7ebf\u7a0b\uff0c\u800c\u662f\u8c03\u7528\uff1a<\/p>\n<p>1     envir().taskScheduler().turnOnBackgroundReadHandling(m_device->getFd(), &#8230;);<br \/>\n  \u8fd9\u4f1a\u8bf7\u6c42 Live555 \u7684 TaskScheduler \u4eb2\u81ea\u53bb\u76d1\u542c V4L2 \u8bbe\u5907\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002<\/p>\n<\/li>\n<li>\u8bfb\u53d6\u65f6\u673a\uff1a\u4e0e\u6a21\u5f0f\u4e00\u7c7b\u4f3c\uff0c\u5f53\u8bbe\u5907\u6587\u4ef6\u63cf\u8ff0\u7b26\u53d8\u4e3a\u201c\u53ef\u8bfb\u201d\u65f6\uff0cLive555 \u7684\u4e8b\u4ef6\u5faa\u73af\u4f1a\u81ea\u52a8\u8c03\u7528\u6ce8\u518c\u7684\u56de\u8c03\u51fd\u6570 incomingPacketHandler()\u3002<\/li>\n<li>\n<p>\u89e6\u53d1\u4ea4\u4ed8\uff1aincomingPacketHandler() \u63a5\u7740\u8c03\u7528 getNextFrame()\uff0c\u540e\u7eed\u6d41\u7a0b\u4e0e\u6a21\u5f0f\u4e00\u5b8c\u5168\u76f8\u540c\uff0c\u6700\u7ec8\u4e5f\u662f\u901a\u8fc7 triggerEvent \u6765\u901a\u77e5 deliverFrame() \u8fdb\u884c\u4ea4\u4ed8\u3002<\/p>\n<p>\u603b\u7ed3\uff1aDeviceSource \u5e76\u4e0d\u662f\u6309\u56fa\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u53bb\u201c\u8f6e\u8be2\u201d\u8bbe\u5907\uff0c\u800c\u662f\u91c7\u7528\u4e8b\u4ef6\u9a71\u52a8\u7684\u65b9\u5f0f\u3002\u65e0\u8bba\u662f\u901a\u8fc7\u72ec\u7acb\u7ebf\u7a0b\u4e2d\u7684 select() \u8fd8\u662f Live555 \u7684<br \/>\nturnOnBackgroundReadHandling()\uff0c\u5b83\u603b\u662f\u5728\u8bbe\u5907\u771f\u6b63\u6709\u6570\u636e\u53ef\u8bfb\u7684\u90a3\u4e00\u523b\u624d\u53bb\u6267\u884c\u8bfb\u53d6\u64cd\u4f5c\u3002\u8bfb\u53d6\u548c\u4ea4\u4ed8\u662f\u5f02\u6b65\u7684\uff0c\u901a\u8fc7 m_captureQueue \u548c triggerEvent \u673a\u5236\u89e3\u8026\u3002<\/p>\n<ol start=\"3\">\n<li>\u663e\u5f0f\u5ef6\u8fdf\uff08Artificial Delays\uff09<\/li>\n<\/ol>\n<p>\u5728\u5206\u6790\u7684\u4ee3\u7801\u4e2d\uff0c\u6ca1\u6709\u53d1\u73b0\u4efb\u4f55\u4e3a\u4e86\u9650\u901f\u6216\u540c\u6b65\u800c\u5f15\u5165\u7684\u4eba\u4e3a\u7684\u3001\u963b\u585e\u5f0f\u7684\u5ef6\u8fdf\u4ee3\u7801\u3002<\/p>\n<\/li>\n<\/ol>\n<ul>\n<li>\u4ee3\u7801\u4e2d\u6ca1\u6709\u4f7f\u7528 sleep()\u3001usleep() \u6216 std::this_thread::sleep_for() \u7b49\u4efb\u4f55\u4f1a\u963b\u585e\u7ebf\u7a0b\u7684\u5ef6\u8fdf\u51fd\u6570\u3002\u8fd9\u5728\u4e8b\u4ef6\u9a71\u52a8\u7684\u7a0b\u5e8f\u4e2d\u662f\u4f18\u79c0\u7684\u8bbe\u8ba1\u5b9e\u8df5\u3002<\/li>\n<li>\n<p>\u5728\u7ebf\u7a0b\u6a21\u5f0f\u7684 select() \u8c03\u7528\u4e2d\uff0c\u867d\u7136\u8bbe\u7f6e\u4e86 1 \u79d2\u7684\u8d85\u65f6<br \/>\n (tv.tv_sec=1)\uff0c\u4f46\u8fd9\u5e76\u975e\u4e3a\u4e86\u5f15\u5165\u5ef6\u8fdf\u3002\u5b83\u7684\u4f5c\u7528\u662f\u9632\u6b62\u7ebf\u7a0b\u5728\u8bbe\u5907\u6c38\u4e45\u4e0d\u8fd4\u56de\u6570\u636e\u7684\u60c5\u51b5\u4e0b\u65e0\u9650\u671f\u963b\u585e\uff0c\u662f\u4e00\u79cd\u201c\u6d3b\u6027\u201d\u68c0\u67e5\uff0c\u800c\u4e0d\u662f\u201c\u9650\u901f\u201d\u673a\u5236\u3002\u5728\u6b63\u5e38\u5de5\u4f5c\u65f6\uff0cselect<br \/>\n () \u4f1a\u5728\u8fdc\u5c0f\u4e8e 1 \u79d2\u7684\u65f6\u95f4\u5185\u88ab\u8bbe\u5907\u6570\u636e\u4e8b\u4ef6\u6240\u5524\u9192\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u8be5\u7cfb\u7edf\u7684\u8bbe\u8ba1\u76ee\u6807\u662f\u5c3d\u53ef\u80fd\u5feb\u5730\u4ece\u8bbe\u5907\u83b7\u53d6\u5e27\u5e76\u8fdb\u884c\u6d41\u5f0f\u4f20\u8f93\uff0c\u5176\u5e27\u7387\u5b8c\u5168\u7531 V4L2 \u8bbe\u5907\u7684\u5b9e\u9645\u8f93\u51fa\u901f\u7387\u51b3\u5b9a\u3002<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u9605\u8bfb\u5e76\u5206\u6790\u4e86 main.cpp \u548c inc\/V4l2RTSPServer.h \u7684\u4ee3\u7801\u3002\u4ee5\u4e0b\u662f\u5173\u4e8e\u60a8\u95ee\u9898\u7684\u603b\u7ed3\uff1a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-3617","post","type-post","status-publish","format-standard","hentry","category-embedded"],"_links":{"self":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/3617","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3617"}],"version-history":[{"count":1,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/3617\/revisions"}],"predecessor-version":[{"id":3618,"href":"http:\/\/www.51cos.com\/index.php?rest_route=\/wp\/v2\/posts\/3617\/revisions\/3618"}],"wp:attachment":[{"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3617"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.51cos.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}