{"id":933,"date":"2023-05-13T19:57:17","date_gmt":"2023-05-13T11:57:17","guid":{"rendered":"https:\/\/www.fanyamin.com\/wordpress\/?p=933"},"modified":"2023-05-14T17:53:47","modified_gmt":"2023-05-14T09:53:47","slug":"%e9%9f%b3%e8%a7%86%e9%a2%91%e7%9a%84%e5%90%8c%e6%ad%a5","status":"publish","type":"post","link":"https:\/\/www.fanyamin.com\/wordpress\/?p=933","title":{"rendered":"\u97f3\u89c6\u9891\u7684\u540c\u6b65"},"content":{"rendered":"<p>\u97f3\u89c6\u9891\u540c\u6b65\u53ef\u68c0\u6d4b\u5230\u7684\u9608\u503c\u5728 +45ms \u5230 -125ms \u4e4b\u95f4, \u53ef\u63a5\u53d7\u7684\u9608\u503c\u5e73\u5747\u7ea6\u4e3a +90ms \u5230 -185 ms, \u6b63\u503c\u8868\u793a\u58f0\u97f3\u76f8\u5bf9\u4e8e\u56fe\u50cf\u8d85\u524d\u591a\u5c11<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.fanyamin.com\/wordpress\/wp-content\/uploads\/2023\/05\/image-1683978956597.png\" alt=\"file\" \/><\/p>\n<p>\u5728 T-REC-G.114-200305 \u4e2d\u603b\u7ed3\u5230:<\/p>\n<ul>\n<li>~280ms \u6709\u4e9b\u7528\u6237\u4e0d\u6ee1\u610f<\/li>\n<li>~380ms \u8bb8\u591a\u7528\u6237\u4e0d\u6ee1\u610f<\/li>\n<li>~500ms \u51e0\u4e4e\u6240\u6709\u90fd\u4e0d\u6ee1\u610f<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.fanyamin.com\/wordpress\/wp-content\/uploads\/2023\/05\/image-1684029836252.png\" alt=\"file\" \/><\/p>\n<p>\u5ef6\u8fdf\u6765\u81ea\u54ea\u91cc, \u53ef\u4ee5\u770b\u770b\u97f3\u89c6\u9891\u5404\u81ea\u7684\u6d41\u7a0b<\/p>\n<ul>\n<li>\u97f3\u9891\u5904\u7406\u6d41\u7a0b<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.fanyamin.com\/wordpress\/wp-content\/uploads\/2023\/05\/image-1684030280019.png\" alt=\"file\" \/><\/p>\n<p>\u5ef6\u8fdf\u53ef\u80fd\u6765\u81ea\u5982\u4e0b\u6b65\u9aa4<\/p>\n<ol>\n<li>\u4ece\u8bbe\u5907\u6355\u83b7\u97f3\u9891\u7684\u5ef6\u8fdf<\/li>\n<li>\u8f93\u5165\u97f3\u9891\u5904\u7406\u7684\u5ef6\u8fdf 3A<\/li>\n<li>\u97f3\u9891\u7f16\u7801\u7684\u5ef6\u8fdf<\/li>\n<li>\u7f51\u7edc\u4f20\u8f93\u7684\u5ef6\u8fdf<\/li>\n<li>\u6296\u52a8\u7f13\u51b2\u7684\u5ef6\u8fdf<\/li>\n<li>\u97f3\u9891\u89e3\u7801\u7684\u5ef6\u8fdf<\/li>\n<li>\u97f3\u9891\u8f93\u51fa\u5904\u7406\u7684\u5ef6\u8fdf<\/li>\n<li>\u4ece\u8bbe\u5907\u8f93\u51fa\u5230\u8033\u6735\u7684\u5ef6\u8fdf<\/li>\n<\/ol>\n<ul>\n<li>\u89c6\u9891\u5904\u7406\u6d41\u7a0b<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.fanyamin.com\/wordpress\/wp-content\/uploads\/2023\/05\/image-1684030365822.png\" alt=\"file\" \/><\/p>\n<p>WebRTC \u4e2d\u6709\u76f8\u5173\u7684\u5ea6\u91cf<\/p>\n<ul>\n<li>estimatedPlayoutTimestamp of type DOMHighResTimeStamp<\/li>\n<\/ul>\n<p>This is the estimated playout time of this receiver's track. \u8fd9\u5c31\u662f\u63a5\u6536\u7684\u97f3\u8f68\u4f30\u8ba1\u7684\u56de\u653e\u65f6\u95f4<br \/>\nThe playout time is the NTP timestamp of the last playable audio sample or video frame that has a known timestamp (from an RTCP SR packet mapping RTP timestamps to NTP timestamps), extrapolated with the time elapsed since it was ready to be played out. This is the &quot;current time&quot; of the track in NTP clock time of the sender and can be present even if there is no audio currently playing.<\/p>\n<p>\u8fd9\u4e2a\u56de\u653e\u65f6\u95f4\u662f\u6700\u8fd1\u7684\u53ef\u64ad\u653e\u7684\u97f3\u9891\u91c7\u6837\u6216\u89c6\u9891\u5e27\u7684 NTP timestamp<br \/>\n\u8fd9\u4e2a NTP timestamp \u901a\u8fc7 RTCP SR \u5305\u7684 RTP timestamp \u4e0e NTP timestamp \u7684\u6620\u5c04\u7b97\u51fa\u6765\u7684, <\/p>\n<p>This can be useful for estimating how much audio and video is out of sync for two tracks from the same source, audioInboundRtpStats.estimatedPlayoutTimestamp - videoInboundRtpStats.estimatedPlayoutTimestamp.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u97f3\u89c6\u9891\u540c\u6b65\u53ef\u68c0\u6d4b\u5230\u7684\u9608\u503c\u5728 +45ms \u5230 -125ms \u4e4b\u95f4, \u53ef\u63a5\u53d7\u7684\u9608\u503c\u5e73\u5747\u7ea6\u4e3a +90ms \u5230 -185 ms, \u6b63\u503c\u8868\u793a\u58f0\u97f3\u76f8\u5bf9\u4e8e\u56fe\u50cf\u8d85\u524d\u591a\u5c11 \u5728 T-REC-G.114-200305 \u4e2d\u603b\u7ed3\u5230: ~280ms \u6709\u4e9b\u7528\u6237\u4e0d\u6ee1\u610f ~380ms \u8bb8\u591a\u7528\u6237\u4e0d\u6ee1\u610f ~500ms \u51e0\u4e4e\u6240\u6709\u90fd\u4e0d\u6ee1\u610f \u5ef6\u8fdf\u6765\u81ea\u54ea\u91cc, \u53ef\u4ee5\u770b\u770b\u97f3\u89c6\u9891\u5404\u81ea\u7684\u6d41\u7a0b \u97f3\u9891\u5904\u7406\u6d41\u7a0b \u5ef6\u8fdf\u53ef\u80fd\u6765\u81ea\u5982\u4e0b\u6b65\u9aa4 \u4ece\u8bbe\u5907\u6355\u83b7\u97f3\u9891\u7684\u5ef6\u8fdf \u8f93\u5165\u97f3\u9891\u5904\u7406\u7684\u5ef6\u8fdf 3A \u97f3\u9891\u7f16\u7801\u7684\u5ef6\u8fdf \u7f51\u7edc\u4f20\u8f93\u7684\u5ef6\u8fdf \u6296\u52a8\u7f13\u51b2\u7684\u5ef6\u8fdf \u97f3\u9891\u89e3\u7801\u7684\u5ef6\u8fdf \u97f3\u9891\u8f93\u51fa\u5904\u7406\u7684\u5ef6\u8fdf \u4ece\u8bbe\u5907\u8f93\u51fa\u5230\u8033\u6735\u7684\u5ef6\u8fdf \u89c6\u9891\u5904\u7406\u6d41\u7a0b WebRTC \u4e2d\u6709\u76f8\u5173\u7684\u5ea6\u91cf estimatedPlayoutTimestamp of type DOMHighResTimeStamp This is the estimated playout time of this receiver&#8217;s track. \u8fd9\u5c31\u662f\u63a5\u6536\u7684\u97f3\u8f68\u4f30\u8ba1\u7684\u56de\u653e\u65f6\u95f4 The playout time is [&hellip;] <a class=\"read-more\" href=\"https:\/\/www.fanyamin.com\/wordpress\/?p=933\" title=\"Permanent Link to: \u97f3\u89c6\u9891\u7684\u540c\u6b65\">&rarr;Read&nbsp;more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-933","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/933"}],"collection":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=933"}],"version-history":[{"count":7,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/933\/revisions"}],"predecessor-version":[{"id":944,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/933\/revisions\/944"}],"wp:attachment":[{"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fanyamin.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}