\u5b8c\u5168\u53d6\u6d88\u5ef6\u9072<\/p>\n\n\n\n\n\n\n\n
ffmpeg -loglevel error \\\n -probesize 32 -analyzeduration 0 \\\n -fflags nobuffer+igndts+genpts -flags low_delay \\\n -use_wallclock_as_timestamps 1 \\\n -max_delay 0 -reorder_queue_size 0 \\\n -buffer_size 102400 \\\n -rtsp_transport tcp \\\n -i 'rtsp:\/\/admin:pwd@192.168.31.160:554\/profile3\/media.smp' \\\n -c copy \\\n -f flv -flvflags no_duration_filesize \\\n -flush_packets 1 \\\n \"rtmp:\/\/127.0.0.1:1935\/live\/liveQQ\"<\/code><\/pre>\n\n\n\n-probesize 32 -analyzeduration 0<\/code><\/strong>\uff1a\uff08\u6700\u95dc\u9375\uff01<\/strong>\uff09\u9810\u8a2d FFmpeg \u6703\u8b80\u53d6\u7d04 5 \u79d2\uff085,000,000 microseconds\uff09\u7684\u5c01\u5305\u4f86\u5206\u6790 Codec \u8cc7\u8a0a\u3002\u5c07\u9019\u5169\u500b\u503c\u6b78\u96f6\/\u6975\u5c0f\u5316\uff0c\u53ef\u4ee5\u7acb\u523b\u7701\u4e0b 2~3 \u79d2\u7684\u958b\u982d\u5ef6\u9072<\/strong>\u3002<\/p>\n\n\n\n-fflags nobuffer+igndts+genpts -flags low_delay<\/code><\/strong>\uff1a\u5f37\u5236\u505c\u7528\u8f38\u5165\u8207\u5167\u90e8\u7684 Packet \u7de9\u885d\u5340\uff0c\u8cc7\u6599\u4e00\u9032\u4f86\u5c31\u7acb\u523b\u5f80\u8f38\u51fa\u7aef\u62cb\u3002<\/p>\n\n\n\n\u5b8c\u5168\u4e0d\u7559\u5b58\u4efb\u4f55\u8f38\u5165\u5c01\u5305\uff08nobuffer\uff09\uff0c\u653e\u68c4\u8017\u6642\u7684\u89e3\u78bc\u6642\u9593\u6233\u6392\u5e8f\uff08igndts\uff09\uff0c\u4e26\u7528\u5373\u6642\u7522\u751f\u7684\u6642\u9593\u6233\u88dc\u9f4a\u683c\u5f0f\uff08genpts\uff09\u3002\u300d\n\n\u9019\u662f FFmpeg \u5728\u505a Stream Copy (\u4e0d\u91cd\u65b0\u7de8\u78bc) \u8f49\u63a8\u6642\uff0c\u65e2\u80fd\u9054\u5230\u96f6\u8a18\u61b6\u9ad4\u6eef\u7559\uff08\u6700\u4f4e\u5ef6\u9072\uff09\uff0c\u53c8\u80fd\u78ba\u4fdd\u4e32\u6d41\u6642\u9593\u8ef8\u4e0d\u5d29\u6f70\u7684\u9ec3\u91d1\u7d44\u5408\u4e4b\u4e00\u3002<\/code><\/pre>\n\n\n\n-use_wallclock_as_timestamps 1<\/code><\/strong>\uff1a \u5728 -i<\/code> \u4e4b\u524d\u52a0\u4e0a\u6b64\u53c3\u6578\u3002\u9019\u6703\u544a\u8a34 FFmpeg \u5b8c\u5168\u62cb\u68c4\u651d\u5f71\u6a5f\u50b3\u904e\u4f86\u7684 RTSP PTS\/DTS\uff0c\u76f4\u63a5\u4ee5 FFmpeg \u6536\u5230\u5c01\u5305\u7576\u4e0b\u7684\u7cfb\u7d71\u6642\u9418\uff08Wallclock\uff09<\/strong> \u4f5c\u70ba\u6642\u9593\u6233\u3002\u9019\u80fd\u7701\u53bb FFmpeg \u89e3\u6790\u8207\u904b\u7b97\u539f\u59cb RTP Header \u6642\u9593\u6233\u7684\u908f\u8f2f\u958b\u92b7\u3002<\/p>\n\n\n\n-flvflags no_duration_filesize<\/code><\/strong>\uff1a\u907f\u514d RTMP\/FLV \u5c01\u88dd\u6642\u70ba\u4e86\u5beb\u5165\u9577\u5ea6\u8cc7\u8a0a\u800c\u7d2f\u7a4d Header \u7de9\u885d\u3002<\/p>\n\n\n\n-max_delay 0<\/code><\/strong>\uff1a\u5f37\u5236\u5c07 muxing\/demuxing \u7684\u6700\u5927\u5ef6\u9072\u8a2d\u70ba 0\uff08\u9810\u8a2d\u70ba 0.7 \u79d2\uff09\u3002<\/p>\n\n\n\n-buffer_size 102400<\/code><\/strong>\uff08\u6216\u66f4\u5c0f\uff09\uff1a\u9650\u5236 RTSP \u8f38\u5165\u7aef\u7684 Socket Receive Buffer\u3002\u9810\u8a2d\u7684\u63a5\u6536\u7de9\u885d\u5340\u8f03\u5927\uff0c\u7576\u7db2\u8def\u6709\u5fae\u5c0f\u6ce2\u52d5\u6642\u5bb9\u6613\u5728 Socket \u5c64\u7a4d\u58d3\u8cc7\u6599\uff1b\u7e2e\u5c0f Buffer \u80fd\u5f37\u5236 Socket \u6709\u8cc7\u6599\u5c31\u7acb\u523b\u62cb\u7d66 FFmpeg\u3002<\/p>\n\n\n\n-reorder_queue_size 0<\/code><\/strong>\uff1a\uff08\u6975\u91cd\u8981\uff09<\/strong> \u544a\u8a34 FFmpeg \u95dc\u9589 RTP \u5c01\u5305\u91cd\u6392\u4f47\u5217\u3002\u5982\u679c\u4f60\u7684\u651d\u5f71\u6a5f\u539f\u672c\u5c31\u4e0d\u542b B-frame\uff08\u4e0d\u9700 PTS\/DTS \u91cd\u6392\uff09\uff0c\u958b\u555f\u9019\u500b\u53c3\u6578\u53ef\u4ee5\u7701\u53bb 1~2 \u500b Frame \u7684\u7b49\u5f85\u7de9\u885d\uff08\u7d04 33~66ms\uff09\u3002<\/p>\n\n\n\n-flush_packets 1<\/code><\/strong>\uff1a\u9019\u662f FFmpeg \u6838\u5fc3\u5c64\u7d1a\u7684\u901a\u7528\u53c3\u6578\uff0c\u5f37\u5236\u8981\u6c42 Muxer \u6bcf\u6536\u5230\u4e00\u500b\u5f71\u97f3 Packet \u5c31\u7acb\u523b\u5beb\u5165 Socket \u62cb\u51fa\uff0c\u4e0d\u7559\u5728 Userspace \u7684 Buffer \u4e2d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5b8c\u5168\u53d6\u6d88\u5ef6\u9072<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4726","post","type-post","status-publish","format-standard","hentry","category-photo"],"_links":{"self":[{"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=\/wp\/v2\/posts\/4726","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4726"}],"version-history":[{"count":1,"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=\/wp\/v2\/posts\/4726\/revisions"}],"predecessor-version":[{"id":4727,"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=\/wp\/v2\/posts\/4726\/revisions\/4727"}],"wp:attachment":[{"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.quantoyo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}